class MeshVertexBuffer(object):
def __init__(self, vertices=0):
self.update(vertices)
self.uniforms = dict()
self.buffer = None
def update(self, vertices):
self.vertices = vertices
self.attributes = dict()
self.offsets = dict()
self.size = 0
self.changed = True
def add(self, name, data, count=3, datatype=GL.GL_FLOAT):
self.attributes[name] = MeshVertexAttribute(name, data, count, datatype)
self.changed = True
def remove(self, name):
if name in self.attributes:
del self.attributes[name]
self.changed = True
def create(self, gl):
if not self.buffer:
self.buffer = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
if not self.buffer.isCreated() and not self.buffer.create():
raise Exception("buffer creation failed!")
self.buffer.bind()
self.offsets = dict()
self.size = 0
for item in self.attributes.values():
self.offsets[item.name] = self.size
self.size += self.vertices * item.count * item.datasize
self.buffer.allocate(self.size)
for item in self.attributes.values():
self.buffer.write(self.offsets[item.name], item.data.data, self.vertices * item.count * item.datasize)
self.buffer.release()
self.changed = False
def destroy(self, gl):
if not self.buffer:
return
self.buffer.destroy()
self.buffer = None
self.changed = True
def enable(self, gl, shader):
if self.changed:
self.create(gl)
shader.setUniforms(self.uniforms)
self.buffer.bind()
for item in self.attributes.values():
if item.enabled:
shader.setAttributeArray(item.name, item.datatype, self.offsets[item.name], item.count)
self.buffer.release()
def disable(self, gl, shader):
for item in self.attributes.values():
if item.enabled:
shader.unsetAttributeArray(item.name)
class MeshIndexBuffer(object):
def __init__(self, elements=0, data=np.zeros((0), dtype=np.uint32), primitives=GL.GL_POINTS, datatype=GL.GL_UNSIGNED_INT):
self.update(elements, data, primitives, datatype)
self.uniforms = dict()
self.buffer = None
def update(self, elements, data, primitives=GL.GL_POINTS, datatype=GL.GL_UNSIGNED_INT):
self.elements = elements
self.data = data
self.primitives = primitives
self.datatype = datatype
if datatype == GL.GL_UNSIGNED_BYTE:
self.datasize = 1
elif datatype == GL.GL_UNSIGNED_SHORT:
self.datasize = 2
elif datatype == GL.GL_UNSIGNED_INT:
self.datasize = 4
else:
raise Exception("unsupported index type")
self.size = 0
self.changed = True
def create(self, gl):
if not self.buffer:
self.buffer = QOpenGLBuffer(QOpenGLBuffer.IndexBuffer)
if not self.buffer.isCreated() and not self.buffer.create():
raise Exception("buffer creation failed!")
self.buffer.bind()
self.size = self.elements * self.datasize
self.buffer.allocate(self.size)
self.buffer.write(0, self.data.data, self.elements * self.datasize)
self.buffer.release()
self.changed = False
def destroy(self, gl):
if not self.buffer:
return
self.buffer.destroy()
self.buffer = None
self.changed = True
def enable(self, gl, shader):
if self.changed:
self.create(gl)
shader.setUniforms(self.uniforms)
self.buffer.bind()
def disable(self, gl, shader):
self.buffer.release()
class RenderWindow(QWindow):
def __init__(self, format):
super(RenderWindow, self).__init__()
self.setSurfaceType(QWindow.OpenGLSurface)
self.setFormat(format)
self.context = QOpenGLContext(self)
self.context.setFormat(self.requestedFormat())
if not self.context.create():
raise Exception("Unable to create GL context")
self.program = None
self.timer = None
self.angle = 0
def initGl(self):
self.program = QOpenGLShaderProgram(self)
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer()
format = self.context.format()
useNewStyleShader = format.profile() == QSurfaceFormat.CoreProfile
# Try to handle 3.0 & 3.1 that do not have the core/compatibility profile
# concept 3.2+ has. This may still fail since version 150 (3.2) is
# specified in the sources but it's worth a try.
if (format.renderableType() == QSurfaceFormat.OpenGL and format.majorVersion() == 3
and format.minorVersion() <= 1):
useNewStyleShader = not format.testOption(QSurfaceFormat.DeprecatedFunctions)
vertexShader = vertexShaderSource if useNewStyleShader else vertexShaderSource110
fragmentShader = fragmentShaderSource if useNewStyleShader else fragmentShaderSource110
if not self.program.addShaderFromSourceCode(QOpenGLShader.Vertex, vertexShader):
raise Exception("Vertex shader could not be added: {} ({})".format(self.program.log(), vertexShader))
if not self.program.addShaderFromSourceCode(QOpenGLShader.Fragment, fragmentShader):
raise Exception("Fragment shader could not be added: {} ({})".format(self.program.log(), fragmentShader))
if not self.program.link():
raise Exception("Could not link shaders: {}".format(self.program.log()))
self.posAttr = self.program.attributeLocation("posAttr")
self.colAttr = self.program.attributeLocation("colAttr")
self.matrixUniform = self.program.uniformLocation("matrix")
self.vbo.create()
self.vbo.bind()
self.verticesData = vertices.tobytes()
self.colorsData = colors.tobytes()
verticesSize = 4 * vertices.size
colorsSize = 4 * colors.size
self.vbo.allocate(VoidPtr(self.verticesData), verticesSize + colorsSize)
self.vbo.write(verticesSize, VoidPtr(self.colorsData), colorsSize)
self.vbo.release()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
if self.vao.isCreated(): # have VAO support, use it
self.setupVertexAttribs()
def setupVertexAttribs(self):
self.vbo.bind()
self.program.setAttributeBuffer(self.posAttr, GL.GL_FLOAT, 0, 2)
self.program.setAttributeBuffer(self.colAttr, GL.GL_FLOAT, 4 * vertices.size, 3)
self.program.enableAttributeArray(self.posAttr)
self.program.enableAttributeArray(self.colAttr)
self.vbo.release()
def exposeEvent(self, event):
if self.isExposed():
self.render()
if self.timer is None:
self.timer = QTimer(self)
self.timer.timeout.connect(self.slotTimer)
if not self.timer.isActive():
self.timer.start(10)
else:
if self.timer and self.timer.isActive():
self.timer.stop()
def render(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
if self.program is None:
functions.glEnable(GL.GL_DEPTH_TEST)
functions.glClearColor(0, 0, 0, 1)
self.initGl()
retinaScale = self.devicePixelRatio()
functions.glViewport(0, 0, self.width() * retinaScale,
self.height() * retinaScale)
functions.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
self.program.bind()
matrix = QMatrix4x4()
matrix.perspective(60, 4 / 3, 0.1, 100)
matrix.translate(0, 0, -2)
matrix.rotate(self.angle, 0, 1, 0)
self.program.setUniformValue(self.matrixUniform, matrix)
if self.vao.isCreated():
self.vao.bind()
else: # no VAO support, set the vertex attribute arrays now
self.setupVertexAttribs()
functions.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
self.vao.release()
self.program.release()
# swapInterval is 1 by default which means that swapBuffers() will (hopefully) block
# and wait for vsync.
self.context.swapBuffers(self)
self.context.doneCurrent()
def slotTimer(self):
self.render()
self.angle += 1
def glInfo(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
text = """Vendor: {}\nRenderer: {}\nVersion: {}\nShading language: {}
\nContext Format: {}\n\nSurface Format: {}""".format(
functions.glGetString(GL.GL_VENDOR), functions.glGetString(GL.GL_RENDERER),
functions.glGetString(GL.GL_VERSION),
functions.glGetString(GL.GL_SHADING_LANGUAGE_VERSION),
print_surface_format(self.context.format()),
print_surface_format(self.format()))
self.context.doneCurrent()
return text
class GLWidget(QOpenGLWidget, QOpenGLFunctions):
xRotationChanged = Signal(int)
yRotationChanged = Signal(int)
zRotationChanged = Signal(int)
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
QOpenGLFunctions.__init__(self)
self.core = "--coreprofile" in QCoreApplication.arguments()
self.xRot = 0
self.yRot = 0
self.zRot = 0
self.lastPos = 0
self.logo = Logo()
self.vao = QOpenGLVertexArrayObject()
self.logoVbo = QOpenGLBuffer()
self.program = QOpenGLShaderProgram()
self.projMatrixLoc = 0
self.mvMatrixLoc = 0
self.normalMatrixLoc = 0
self.lightPosLoc = 0
self.proj = QMatrix4x4()
self.camera = QMatrix4x4()
self.world = QMatrix4x4()
self.transparent = "--transparent" in QCoreApplication.arguments()
if self.transparent:
fmt = self.format()
fmt.setAlphaBufferSize(8)
self.setFormat(fmt)
def xRotation(self):
return self.xRot
def yRotation(self):
return self.yRot
def zRotation(self):
return self.zRot
def minimumSizeHint(self):
return QSize(50, 50)
def sizeHint(self):
return QSize(400, 400)
def normalizeAngle(self, angle):
while angle < 0:
angle += 360 * 16
while angle > 360 * 16:
angle -= 360 * 16
return angle
def setXRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.xRot:
self.xRot = angle
self.emit(SIGNAL("xRotationChanged(int)"), angle)
self.update()
def setYRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.yRot:
self.yRot = angle
self.emit(SIGNAL("yRotationChanged(int)"), angle)
self.update()
def setZRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.zRot:
self.zRot = angle
self.emit(SIGNAL("zRotationChanged(int)"), angle)
self.update()
def cleanup(self):
self.makeCurrent()
self.logoVbo.destroy()
del self.program
self.program = None
self.doneCurrent()
def vertexShaderSourceCore(self):
return """#version 150
in vec4 vertex;
in vec3 normal;
out vec3 vert;
out vec3 vertNormal;
uniform mat4 projMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
void main() {
vert = vertex.xyz;
vertNormal = normalMatrix * normal;
gl_Position = projMatrix * mvMatrix * vertex;
}"""
def fragmentShaderSourceCore(self):
return """#version 150
in highp vec3 vert;
in highp vec3 vertNormal;
out highp vec4 fragColor;
uniform highp vec3 lightPos;
void main() {
highp vec3 L = normalize(lightPos - vert);
highp float NL = max(dot(normalize(vertNormal), L), 0.0);
highp vec3 color = vec3(0.39, 1.0, 0.0);
highp vec3 col = clamp(color * 0.2 + color * 0.8 * NL, 0.0, 1.0);
fragColor = vec4(col, 1.0);
}"""
def vertexShaderSource(self):
return """attribute vec4 vertex;
attribute vec3 normal;
varying vec3 vert;
varying vec3 vertNormal;
uniform mat4 projMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
void main() {
vert = vertex.xyz;
vertNormal = normalMatrix * normal;
gl_Position = projMatrix * mvMatrix * vertex;
}"""
def fragmentShaderSource(self):
return """varying highp vec3 vert;
varying highp vec3 vertNormal;
uniform highp vec3 lightPos;
void main() {
highp vec3 L = normalize(lightPos - vert);
highp float NL = max(dot(normalize(vertNormal), L), 0.0);
highp vec3 color = vec3(0.39, 1.0, 0.0);
highp vec3 col = clamp(color * 0.2 + color * 0.8 * NL, 0.0, 1.0);
gl_FragColor = vec4(col, 1.0);
}"""
def initializeGL(self):
self.context().aboutToBeDestroyed.connect(self.cleanup)
self.initializeOpenGLFunctions()
self.glClearColor(0, 0, 0, 1)
self.program = QOpenGLShaderProgram()
if self.core:
self.vertexShader = self.vertexShaderSourceCore()
self.fragmentShader = self.fragmentShaderSourceCore()
else:
self.vertexShader = self.vertexShaderSource()
self.fragmentShader = self.fragmentShaderSource()
self.program.addShaderFromSourceCode(QOpenGLShader.Vertex,
self.vertexShader)
self.program.addShaderFromSourceCode(QOpenGLShader.Fragment,
self.fragmentShader)
self.program.bindAttributeLocation("vertex", 0)
self.program.bindAttributeLocation("normal", 1)
self.program.link()
self.program.bind()
self.projMatrixLoc = self.program.uniformLocation("projMatrix")
self.mvMatrixLoc = self.program.uniformLocation("mvMatrix")
self.normalMatrixLoc = self.program.uniformLocation("normalMatrix")
self.lightPosLoc = self.program.uniformLocation("lightPos")
self.vao.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.logoVbo.create()
self.logoVbo.bind()
float_size = ctypes.sizeof(ctypes.c_float)
self.logoVbo.allocate(self.logo.constData(),
self.logo.count() * float_size)
self.setupVertexAttribs()
self.camera.setToIdentity()
self.camera.translate(0, 0, -1)
self.program.setUniformValue(self.lightPosLoc, QVector3D(0, 0, 70))
self.program.release()
vaoBinder = None
def setupVertexAttribs(self):
self.logoVbo.bind()
f = QOpenGLContext.currentContext().functions()
f.glEnableVertexAttribArray(0)
f.glEnableVertexAttribArray(1)
float_size = ctypes.sizeof(ctypes.c_float)
null = VoidPtr(0)
pointer = VoidPtr(3 * float_size)
f.glVertexAttribPointer(0, 3, int(GL.GL_FLOAT), int(GL.GL_FALSE),
6 * float_size, null)
f.glVertexAttribPointer(1, 3, int(GL.GL_FLOAT), int(GL.GL_FALSE),
6 * float_size, pointer)
self.logoVbo.release()
def paintGL(self):
self.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
self.glEnable(GL.GL_DEPTH_TEST)
self.glEnable(GL.GL_CULL_FACE)
self.world.setToIdentity()
self.world.rotate(180 - (self.xRot / 16), 1, 0, 0)
self.world.rotate(self.yRot / 16, 0, 1, 0)
self.world.rotate(self.zRot / 16, 0, 0, 1)
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.program.bind()
self.program.setUniformValue(self.projMatrixLoc, self.proj)
self.program.setUniformValue(self.mvMatrixLoc,
self.camera * self.world)
normalMatrix = self.world.normalMatrix()
self.program.setUniformValue(self.normalMatrixLoc, normalMatrix)
self.glDrawArrays(GL.GL_TRIANGLES, 0, self.logo.vertexCount())
self.program.release()
vaoBinder = None
def resizeGL(self, width, height):
self.proj.setToIdentity()
self.proj.perspective(45, width / height, 0.01, 100)
def mousePressEvent(self, event):
self.lastPos = QPoint(event.pos())
def mouseMoveEvent(self, event):
dx = event.x() - self.lastPos.x()
dy = event.y() - self.lastPos.y()
if event.buttons() & Qt.LeftButton:
self.setXRotation(self.xRot + 8 * dy)
self.setYRotation(self.yRot + 8 * dx)
elif event.buttons() & Qt.RightButton:
self.setXRotation(self.xRot + 8 * dy)
self.setZRotation(self.zRot + 8 * dx)
self.lastPos = QPoint(event.pos())
class GLWidget(QOpenGLWidget, QOpenGLFunctions):
xRotationChanged = Signal(int)
yRotationChanged = Signal(int)
zRotationChanged = Signal(int)
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
QOpenGLFunctions.__init__(self)
self.core = "--coreprofile" in QCoreApplication.arguments()
self.xRot = 0
self.yRot = 0
self.zRot = 0
self.lastPos = 0
self.logo = Logo()
self.vao = QOpenGLVertexArrayObject()
self.logoVbo = QOpenGLBuffer()
self.program = QOpenGLShaderProgram()
self.projMatrixLoc = 0
self.mvMatrixLoc = 0
self.normalMatrixLoc = 0
self.lightPosLoc = 0
self.proj = QMatrix4x4()
self.camera = QMatrix4x4()
self.world = QMatrix4x4()
self.transparent = "--transparent" in QCoreApplication.arguments()
if self.transparent:
fmt = self.format()
fmt.setAlphaBufferSize(8)
self.setFormat(fmt)
def xRotation(self):
return self.xRot
def yRotation(self):
return self.yRot
def zRotation(self):
return self.zRot
def minimumSizeHint(self):
return QSize(50, 50)
def sizeHint(self):
return QSize(400, 400)
def normalizeAngle(self, angle):
while angle < 0:
angle += 360 * 16
while angle > 360 * 16:
angle -= 360 * 16
return angle
def setXRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.xRot:
self.xRot = angle
self.emit(SIGNAL("xRotationChanged(int)"), angle)
self.update()
def setYRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.yRot:
self.yRot = angle
self.emit(SIGNAL("yRotationChanged(int)"), angle)
self.update()
def setZRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.zRot:
self.zRot = angle
self.emit(SIGNAL("zRotationChanged(int)"), angle)
self.update()
def cleanup(self):
self.makeCurrent()
self.logoVbo.destroy()
del self.program
self.program = None
self.doneCurrent()
def vertexShaderSourceCore(self):
return """#version 150
in vec4 vertex;
in vec3 normal;
out vec3 vert;
out vec3 vertNormal;
uniform mat4 projMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
void main() {
vert = vertex.xyz;
vertNormal = normalMatrix * normal;
gl_Position = projMatrix * mvMatrix * vertex;
}"""
def fragmentShaderSourceCore(self):
return """#version 150
in highp vec3 vert;
in highp vec3 vertNormal;
out highp vec4 fragColor;
uniform highp vec3 lightPos;
void main() {
highp vec3 L = normalize(lightPos - vert);
highp float NL = max(dot(normalize(vertNormal), L), 0.0);
highp vec3 color = vec3(0.39, 1.0, 0.0);
highp vec3 col = clamp(color * 0.2 + color * 0.8 * NL, 0.0, 1.0);
fragColor = vec4(col, 1.0);
}"""
def vertexShaderSource(self):
return """attribute vec4 vertex;
attribute vec3 normal;
varying vec3 vert;
varying vec3 vertNormal;
uniform mat4 projMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
void main() {
vert = vertex.xyz;
vertNormal = normalMatrix * normal;
gl_Position = projMatrix * mvMatrix * vertex;
}"""
def fragmentShaderSource(self):
return """varying highp vec3 vert;
varying highp vec3 vertNormal;
uniform highp vec3 lightPos;
void main() {
highp vec3 L = normalize(lightPos - vert);
highp float NL = max(dot(normalize(vertNormal), L), 0.0);
highp vec3 color = vec3(0.39, 1.0, 0.0);
highp vec3 col = clamp(color * 0.2 + color * 0.8 * NL, 0.0, 1.0);
gl_FragColor = vec4(col, 1.0);
}"""
def initializeGL(self):
self.context().aboutToBeDestroyed.connect(self.cleanup)
self.initializeOpenGLFunctions()
self.glClearColor(0, 0, 0, 1)
self.program = QOpenGLShaderProgram()
if self.core:
self.vertexShader = self.vertexShaderSourceCore()
self.fragmentShader = self.fragmentShaderSourceCore()
else:
self.vertexShader = self.vertexShaderSource()
self.fragmentShader = self.fragmentShaderSource()
self.program.addShaderFromSourceCode(QOpenGLShader.Vertex, self.vertexShader)
self.program.addShaderFromSourceCode(QOpenGLShader.Fragment, self.fragmentShader)
self.program.bindAttributeLocation("vertex", 0)
self.program.bindAttributeLocation("normal", 1)
self.program.link()
self.program.bind()
self.projMatrixLoc = self.program.uniformLocation("projMatrix")
self.mvMatrixLoc = self.program.uniformLocation("mvMatrix")
self.normalMatrixLoc = self.program.uniformLocation("normalMatrix")
self.lightPosLoc = self.program.uniformLocation("lightPos")
self.vao.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.logoVbo.create()
self.logoVbo.bind()
float_size = ctypes.sizeof(ctypes.c_float)
self.logoVbo.allocate(self.logo.constData(), self.logo.count() * float_size)
self.setupVertexAttribs()
self.camera.setToIdentity()
self.camera.translate(0, 0, -1)
self.program.setUniformValue(self.lightPosLoc, QVector3D(0, 0, 70))
self.program.release()
vaoBinder = None
def setupVertexAttribs(self):
self.logoVbo.bind()
f = QOpenGLContext.currentContext().functions()
f.glEnableVertexAttribArray(0)
f.glEnableVertexAttribArray(1)
float_size = ctypes.sizeof(ctypes.c_float)
null = VoidPtr(0)
pointer = VoidPtr(3 * float_size)
f.glVertexAttribPointer(0, 3, int(GL.GL_FLOAT), int(GL.GL_FALSE), 6 * float_size, null)
f.glVertexAttribPointer(1, 3, int(GL.GL_FLOAT), int(GL.GL_FALSE), 6 * float_size, pointer)
self.logoVbo.release()
def paintGL(self):
self.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
self.glEnable(GL.GL_DEPTH_TEST)
self.glEnable(GL.GL_CULL_FACE)
self.world.setToIdentity()
self.world.rotate(180 - (self.xRot / 16), 1, 0, 0)
self.world.rotate(self.yRot / 16, 0, 1, 0)
self.world.rotate(self.zRot / 16, 0, 0, 1)
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.program.bind()
self.program.setUniformValue(self.projMatrixLoc, self.proj)
self.program.setUniformValue(self.mvMatrixLoc, self.camera * self.world)
normalMatrix = self.world.normalMatrix()
self.program.setUniformValue(self.normalMatrixLoc, normalMatrix)
self.glDrawArrays(GL.GL_TRIANGLES, 0, self.logo.vertexCount())
self.program.release()
vaoBinder = None
def resizeGL(self, width, height):
self.proj.setToIdentity()
self.proj.perspective(45, width / height, 0.01, 100)
def mousePressEvent(self, event):
self.lastPos = QPoint(event.pos())
def mouseMoveEvent(self, event):
dx = event.x() - self.lastPos.x()
dy = event.y() - self.lastPos.y()
if event.buttons() & Qt.LeftButton:
self.setXRotation(self.xRot + 8 * dy)
self.setYRotation(self.yRot + 8 * dx)
elif event.buttons() & Qt.RightButton:
self.setXRotation(self.xRot + 8 * dy)
self.setZRotation(self.zRot + 8 * dx)
self.lastPos = QPoint(event.pos())
class SquareObject(QObject):
def __init__(self, parent=None):
super(SquareObject, self).__init__(parent=parent)
self.initialize_shader_program()
self.initialize_geometry()
self.initialize_geometry_on_gpu()
self.initialize_texture_on_gpu()
def destroy(self):
self.vao.release()
self.vao.destroy()
self.vbo.release()
self.vbo.destroy()
self.ebo.release()
self.ebo.destroy()
self.texture0.release()
self.texture0.destroy()
self.texture1.release()
self.texture1.destroy()
def initialize_shader_program(self):
self.vertex_shader = """
#version 330 core
layout (location = 0) in vec3 in_coords;
layout (location = 1) in vec3 in_color;
layout (location = 2) in vec2 in_tex_coords;
uniform mat4 transform;
out vec3 out_color;
out vec2 out_tex_coords;
void main()
{
gl_Position = transform * vec4(in_coords, 1.0);
out_color = in_color;
out_tex_coords = vec2(in_tex_coords.x, in_tex_coords.y);
}
"""
self.fragment_shader = """
#version 330 core
in vec3 out_color;
in vec2 out_tex_coords;
out vec4 frag_color;
uniform sampler2D texture0;
uniform sampler2D texture1;
void main()
{
if (out_tex_coords.x > 0.5)
frag_color = texture(texture0, out_tex_coords);
else
frag_color = texture(texture1, out_tex_coords);
//frag_color = mix(texture(texture0, out_tex_coords),
// texture(texture1, out_tex_coords), 0.5)
// * vec4(out_color, 1.0);
}
"""
self.arg_pos = {
'in_coords': 0,
'in_color': 1,
'in_tex_coords': 2,
'out_color': 0
}
self.program = QOpenGLShaderProgram(parent=self.parent())
self.program.addCacheableShaderFromSourceCode(QOpenGLShader.Vertex,
self.vertex_shader)
self.program.addCacheableShaderFromSourceCode(QOpenGLShader.Fragment,
self.fragment_shader)
self.program.link()
self.program.bind()
def initialize_geometry(self):
self.vertices = np.array(
[
# coords color texture coords
[0.5, -0.5, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0], # bottom-right
[0.5, 0.5, 0.0, 1.0, 0.0, 0.0, 1.0, 1.0], # top-right
[-0.5, 0.5, 0.0, 1.0, 1.0, 0.0, 0.0, 1.0], # top-let
[-0.5, -0.5, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0] # bottom-let
],
dtype=np.float32)
self.triangles = np.array([[0, 1, 2], [2, 3, 0]], dtype=np.int32)
def initialize_geometry_on_gpu(self):
self.vao = QOpenGLVertexArrayObject(self.parent())
if not self.vao.create():
raise ValueError('Could not create VAO')
self.vao.bind()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
if not self.vbo.create():
raise ValueError('Could not create VBO')
self.vbo.bind()
self.vbo.setUsagePattern(QOpenGLBuffer.StaticDraw)
vertices_data = self.vertices.tostring()
self.vbo.allocate(len(vertices_data))
self.vbo.write(0, vertices_data, len(vertices_data))
self.ebo = QOpenGLBuffer(QOpenGLBuffer.IndexBuffer)
if not self.ebo.create():
raise ValueError('Could not create EBO')
self.ebo.bind()
self.ebo.setUsagePattern(QOpenGLBuffer.StaticDraw)
triangles_data = self.triangles.tostring()
self.ebo.allocate(len(triangles_data))
self.ebo.write(0, triangles_data, len(triangles_data))
self.program.enableAttributeArray(self.arg_pos['in_coords'])
self.program.setAttributeBuffer(
self.arg_pos['in_coords'], gl.GL_FLOAT, 0, 3,
self.vertices.shape[1] * self.vertices.dtype.itemsize)
self.program.enableAttributeArray(self.arg_pos['in_color'])
self.program.setAttributeBuffer(
self.arg_pos['in_color'], gl.GL_FLOAT,
3 * self.vertices.dtype.itemsize, 3,
self.vertices.shape[1] * self.vertices.dtype.itemsize)
self.program.enableAttributeArray(self.arg_pos['in_tex_coords'])
self.program.setAttributeBuffer(
self.arg_pos['in_tex_coords'], gl.GL_FLOAT,
6 * self.vertices.dtype.itemsize, 2,
self.vertices.shape[1] * self.vertices.dtype.itemsize)
self.vao.release()
self.vbo.release()
self.ebo.release()
def initialize_texture_on_gpu(self):
# Texture 0.
image0 = QImage(path.join(DATA_DIR, 'ksmall.jpg')).mirrored()
self.texture0 = QOpenGLTexture(image0)
self.texture0.setMinificationFilter(QOpenGLTexture.LinearMipMapLinear)
self.texture0.setMagnificationFilter(QOpenGLTexture.Linear)
self.texture0.setWrapMode(QOpenGLTexture.Repeat)
self.texture0.bind(0)
self.program.setUniformValue(self.program.uniformLocation('texture0'),
0)
# Texture 1.
image1 = QImage(path.join(DATA_DIR, 'sunflowerField.jpg')).mirrored()
self.texture1 = QOpenGLTexture(image1)
self.texture1.setMinificationFilter(QOpenGLTexture.LinearMipMapLinear)
self.texture1.setMagnificationFilter(QOpenGLTexture.Linear)
self.texture1.setWrapMode(QOpenGLTexture.Repeat)
self.texture1.bind(1)
self.program.setUniformValue(self.program.uniformLocation('texture1'),
1)
def render(self, transform):
self.program.bind()
self.program.setUniformValue('transform', transform)
self.vao.bind()
gl.glDrawElements(gl.GL_TRIANGLES, self.triangles.size,
gl.GL_UNSIGNED_INT, None)
self.program.release()
class OpenGLWidget(QOpenGLWidget, QOpenGLExtraFunctions):
def __init__(self, fmt: QSurfaceFormat, parent=None, *args, **kwargs):
QOpenGLWidget.__init__(self, parent, *args, **kwargs)
QOpenGLExtraFunctions.__init__(self, *args, **kwargs)
self.width, self.height = 1280, 720
self.program = QOpenGLShaderProgram()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.ebo = QOpenGLBuffer(QOpenGLBuffer.IndexBuffer)
self.vao = QOpenGLVertexArrayObject()
self.model_loc = None
self.projection_loc = None
self.camera_loc = None
self.attrib_loc = None
self.shape = Cube()
self.models = []
self.model = None
self.projection = None
self.camera = Camera()
self.last_pos = QPoint(self.width / 2.0, self.height / 2.0)
self.setFormat(fmt)
self.context = QOpenGLContext(self)
if not self.context.create():
raise RuntimeError("Unable to create GL context")
self.timer = QTimer()
self.timer.timeout.connect(self.update)
self.timer.start(1000.0/FPS)
### QtGL ###
def initializeGL(self) -> None:
self.context.aboutToBeDestroyed.connect(self.cleanup)
self.initializeOpenGLFunctions()
self.build_shaders()
self.create_vbo()
self.glClearColor(0.2, 0.0, 0.2, 0.5)
def paintGL(self) -> None:
self.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT)
self.glEnable(gl.GL_DEPTH_TEST)
self.camera.move()
self.render()
def resizeGL(self, width: int, height: int) -> None:
self.width, self.height = width, height
self.glViewport(0, 0, width, height)
self.projection = pyrr.matrix44.create_perspective_projection_matrix(45, width/height, 0.1, 150)
def render(self) -> None:
self.program.bind()
vao_binder = QOpenGLVertexArrayObject.Binder(self.vao)
# TODO: switch to Qt functions (doesn't work)
gl.glUniformMatrix4fv(self.projection_loc, 1, gl.GL_FALSE, self.projection)
view = self.camera.get_view_matrix()
gl.glUniformMatrix4fv(self.camera_loc, 1, gl.GL_FALSE, view)
for model in self.models:
# TODO: move to entity class ?
rotation = pyrr.matrix44.create_from_axis_rotation(
pyrr.vector3.create_from_matrix44_translation(model),
time.time(),
)
scale = pyrr.matrix44.create_from_scale(
pyrr.vector3.create_from_matrix44_translation(model) * 0.1,
)
rotation = pyrr.matrix44.multiply(scale, rotation)
model = pyrr.matrix44.multiply(rotation, model)
orbit = pyrr.Matrix44.from_y_rotation(-0.1*time.time())
model = pyrr.matrix44.multiply(model, orbit)
gl.glUniformMatrix4fv(self.model_loc, 1, gl.GL_FALSE, model)
self.glDrawElements(gl.GL_TRIANGLES, len(self.shape.indices), gl.GL_UNSIGNED_INT, VoidPtr(0))
self.program.release()
vao_binder = None
### Helpers ###
def build_shaders(self) -> None:
if not self.program.addShaderFromSourceFile(QOpenGLShader.Vertex, "shaders/vertex_shader.glsl"):
raise FileNotFoundError("Unable to load vertex shader")
if not self.program.addShaderFromSourceFile(QOpenGLShader.Fragment, "shaders/fragment_shader.glsl"):
raise FileNotFoundError("Unable to load fragment shader")
if not self.program.link():
raise RuntimeError("Unable to link shader program")
def create_vbo(self) -> None:
self.program.bind() # suspicious behaviour ?
self.vao.create()
vao_binder = QOpenGLVertexArrayObject.Binder(self.vao)
self.vbo.create()
self.vbo.bind()
self.vbo.allocate(self.shape.vertices, self.shape.vertices.nbytes)
self.attrib_loc = self.program.attributeLocation("a_position")
self.model_loc = self.program.uniformLocation("model")
self.projection_loc = self.program.uniformLocation("projection")
self.camera_loc = self.program.uniformLocation("camera")
for i in range(150):
x, y, z = random.normalvariate(0, 15), random.normalvariate(0, 15), random.normalvariate(0, 15)
self.models.append(pyrr.matrix44.create_from_translation(pyrr.Vector3([x, y, z])))
self.ebo.create()
self.ebo.bind()
self.ebo.allocate(self.shape.indices, self.shape.indices.nbytes)
float_size = ctypes.sizeof(ctypes.c_float) # (4)
null = VoidPtr(0)
pointer = VoidPtr(3 * float_size)
self.glEnableVertexAttribArray(0)
self.glVertexAttribPointer(
0, 3, gl.GL_FLOAT, gl.GL_FALSE, 6 * float_size, null
)
self.glEnableVertexAttribArray(1)
self.glVertexAttribPointer(
1, 3, gl.GL_FLOAT, gl.GL_FALSE, 6 * float_size, pointer
)
self.vao.release()
self.vbo.release()
self.ebo.release()
self.program.release()
vao_binder = None
### Events ###
def keyPressEvent(self, event):
"""W: 0x57, A: 0x41, S: 0x53, D: 0x44, space: 0x20, shift: 0x01000020""" # TODO: make keymap
if event.key() == int(0x57):
self.camera.keyboard_press("FORWARD")
elif event.key() == int(0x53):
self.camera.keyboard_press("BACKWARD")
if event.key() == int(0x41):
self.camera.keyboard_press("LEFT")
elif event.key() == int(0x44):
self.camera.keyboard_press("RIGHT")
if event.key() == int(0x20):
self.camera.keyboard_press("UP")
elif event.key() == int(0x01000020):
self.camera.keyboard_press("DOWN")
def keyReleaseEvent(self, event):
if event.key() == int(0x57):
self.camera.keyboard_release("FORWARD")
elif event.key() == int(0x53):
self.camera.keyboard_release("BACKWARD")
if event.key() == int(0x41):
self.camera.keyboard_release("LEFT")
elif event.key() == int(0x44):
self.camera.keyboard_release("RIGHT")
if event.key() == int(0x20):
self.camera.keyboard_release("UP")
elif event.key() == int(0x01000020):
self.camera.keyboard_release("DOWN")
def mousePressEvent(self, event):
self.last_pos = QPoint(event.pos())
event.accept()
def mouseMoveEvent(self, event):
dx = event.x() - self.last_pos.x()
dy = event.y() - self.last_pos.y()
if event.buttons():
self.camera.mouse_movement(float(dx), float(dy))
event.accept()
self.last_pos = QPoint(event.pos())
def wheelEvent(self, event):
if event.type() in (Qt.ScrollBegin, Qt.ScrollEnd): # FIXME: doesn't seem to work, true divide err
return
degrees = event.delta() / 8
steps = degrees / 15
event.accept()
self.camera.scroll_movement(steps)
### Slots ###
@Slot()
def cleanup(self):
if not self.makeCurrent():
raise Exception("Could not make context current")
self.vbo.destroy()
self.program.bind()
self.program.removeAllShaders()
self.program.release()
del self.program
self.program = None
self.doneCurrent()
class EventsGL(QOpenGLWidget):
"Cube gl widget"
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
# camera
self.camera = QtCamera()
self.camera.position = QVector3D(0.0, 0.0, 3.0)
self.camera.front = QVector3D(0.0, 0.0, -1.0)
self.camera.up = QVector3D(0.0, 1.0, 0.0)
self.camera.movementSensitivity = 0.05
# shaders etc
tutoTutoDir = os.path.dirname(__file__)
tutoPardir = os.path.join(tutoTutoDir, os.pardir)
tutoPardir = os.path.realpath(tutoPardir)
mediaDir = os.path.join(tutoPardir, "media")
shaderDir = os.path.join(mediaDir, "shaders")
availableShaders = ["cube"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
}
for name in availableShaders
}
self.core = "--coreprofile" in QCoreApplication.arguments()
imdir = os.path.join(mediaDir, "images")
imFName = "im"
imageFile1 = os.path.join(imdir, imFName + "0.png")
self.image1 = QImage(imageFile1).mirrored()
imageFile2 = os.path.join(imdir, imFName + "1.png")
self.image2 = QImage(imageFile2).mirrored()
# opengl data related
self.context = QOpenGLContext()
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.program = QOpenGLShaderProgram()
self.texture1 = None
self.texture2 = None
self.texUnit1 = 0
self.texUnit2 = 1
# vertex data
self.cubeVertices = np.array(
[
# pos vec3 || texcoord vec2
-0.5,
-0.5,
-0.5,
0.0,
0.0,
0.5,
-0.5,
-0.5,
1.0,
0.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
-0.5,
0.5,
-0.5,
0.0,
1.0,
-0.5,
-0.5,
-0.5,
0.0,
0.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
0.5,
-0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
0.5,
1.0,
1.0,
0.5,
0.5,
0.5,
1.0,
1.0,
-0.5,
0.5,
0.5,
0.0,
1.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
-0.5,
0.5,
0.5,
1.0,
0.0,
-0.5,
0.5,
-0.5,
1.0,
1.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
-0.5,
0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
0.5,
-0.5,
-0.5,
0.0,
1.0,
0.5,
-0.5,
-0.5,
0.0,
1.0,
0.5,
-0.5,
0.5,
0.0,
0.0,
0.5,
0.5,
0.5,
1.0,
0.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
0.5,
-0.5,
-0.5,
1.0,
1.0,
0.5,
-0.5,
0.5,
1.0,
0.0,
0.5,
-0.5,
0.5,
1.0,
0.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
-0.5,
0.5,
-0.5,
0.0,
1.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
0.5,
0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
0.5,
1.0,
0.0,
-0.5,
0.5,
0.5,
0.0,
0.0,
-0.5,
0.5,
-0.5,
0.0,
1.0
],
dtype=ctypes.c_float)
# cube worldSpace coordinates
self.cubeCoords = [
QVector3D(0.2, 1.1, -1.0),
QVector3D(2.0, 5.0, -15.0),
QVector3D(-1.5, -2.2, -2.5),
QVector3D(-3.8, -2.0, -12.3),
QVector3D(2.4, -0.4, -3.5),
QVector3D(-1.7, 3.0, -7.5),
QVector3D(1.3, -2.0, -2.5),
QVector3D(1.5, 2.0, -2.5),
QVector3D(1.5, 0.2, -1.5),
QVector3D(-1.3, 1.0, -1.5)
]
self.rotateVector = QVector3D(0.7, 0.2, 0.5)
def loadShader(self, shaderName: str, shaderType: str):
"Load shader"
shader = self.shaders[shaderName]
shaderSourcePath = shader[shaderType]
if shaderType == "vertex":
shader = QOpenGLShader(QOpenGLShader.Vertex)
else:
shader = QOpenGLShader(QOpenGLShader.Fragment)
#
isCompiled = shader.compileSourceFile(shaderSourcePath)
if isCompiled is False:
print(shader.log())
raise ValueError(
"{0} shader {2} known as {1} is not compiled".format(
shaderType, shaderName, shaderSourcePath))
return shader
def useShaders(self, shaderProgram: QOpenGLShaderProgram,
shaders: {"shaderName": ["shaderType"]}, attrLocs: dict):
""
print("program shaders: ", shaderProgram.shaders())
for shaderName, shaderTypes in shaders.items():
#
if len(shaderTypes) == 2:
self.useShaderSingleName(shaderProgram=shaderProgram,
shaderName=shaderName,
attrLocs=attrLocs)
elif len(shaderTypes) == 1:
shaderType = shaderTypes[0]
if shaderType == "vertex":
shader = self.loadVertexShader(shaderName)
else:
shader = self.loadFragmentShader(shaderName)
shaderProgram.addShader(shader)
# adding shader
self.bindLinkProgram(shaderProgram, attrLocs)
def loadVertexShader(self, shaderName: str):
"load vertex shader"
return self.loadShader(shaderName, "vertex")
def loadFragmentShader(self, shaderName: str):
"load fragment shader"
return self.loadShader(shaderName, "fragment")
def getGlInfo(self):
"Get opengl info"
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(pygl.glGetString(pygl.GL_VENDOR),
pygl.glGetString(pygl.GL_RENDERER),
pygl.glGetString(pygl.GL_VERSION),
pygl.glGetString(pygl.GL_SHADING_LANGUAGE_VERSION))
return info
def moveCamera(self, direction: str):
"Move camera to certain direction and update gl widget"
self.camera.move(direction, deltaTime=0.05)
self.update()
def turnAround(self, x: float, y: float):
""
self.camera.lookAround(xoffset=x, yoffset=y, pitchBound=True)
self.update()
def rotateCubes(self, xval: float, yval: float, zval: float):
""
self.rotateVector.setZ(zval)
self.rotateVector.setY(yval)
self.rotateVector.setX(xval)
self.update()
def cleanUpGl(self):
"Clean up everything"
self.context.makeCurrent()
self.vbo.destroy()
self.texture1.destroy()
self.texture2.destroy()
self.vao.destroy()
del self.program
self.program = None
self.doneCurrent()
def resizeGL(self, width: int, height: int):
"Resize the viewport"
funcs = self.context.functions()
funcs.glViewport(0, 0, width, height)
def initializeGL(self):
print('gl initial')
print(self.getGlInfo())
# create context and make it current
self.context.create()
self.context.aboutToBeDestroyed.connect(self.cleanUpGl)
# initialize functions
funcs = self.context.functions()
funcs.initializeOpenGLFunctions()
funcs.glClearColor(0.0, 0.4, 0.4, 0)
funcs.glEnable(pygl.GL_DEPTH_TEST)
funcs.glEnable(pygl.GL_TEXTURE_2D)
# create uniform values for shaders
# deal with shaders
# cube shader
self.program = QOpenGLShaderProgram(self.context)
vshader = self.loadVertexShader("cube")
fshader = self.loadFragmentShader("cube")
self.program.addShader(vshader) # adding vertex shader
self.program.addShader(fshader) # adding fragment shader
self.program.bindAttributeLocation("aPos", 0)
self.program.bindAttributeLocation("aTexCoord", 1)
isLinked = self.program.link()
print("cube shader program is linked: ", isLinked)
# bind the program
self.program.bind()
self.program.setUniformValue('myTexture1', self.texUnit1)
self.program.setUniformValue('myTexture2', self.texUnit2)
#
# deal with vaos and vbo
# vbo
isVbo = self.vbo.create()
isVboBound = self.vbo.bind()
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate space on vbo buffer
self.vbo.allocate(self.cubeVertices.tobytes(),
floatSize * self.cubeVertices.size)
self.vao.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
funcs.glEnableVertexAttribArray(0) # viewport
funcs.glVertexAttribPointer(0, 3, int(pygl.GL_FLOAT),
int(pygl.GL_FALSE), 5 * floatSize,
VoidPtr(0))
funcs.glEnableVertexAttribArray(1)
funcs.glVertexAttribPointer(1, 2, int(pygl.GL_FLOAT),
int(pygl.GL_FALSE), 5 * floatSize,
VoidPtr(3 * floatSize))
# deal with textures
# first texture
self.texture1 = QOpenGLTexture(QOpenGLTexture.Target2D)
self.texture1.create()
self.texture1.bind(self.texUnit1)
self.texture1.setData(self.image1)
self.texture1.setMinMagFilters(QOpenGLTexture.Nearest,
QOpenGLTexture.Nearest)
self.texture1.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self.texture1.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
# second texture
self.texture2 = QOpenGLTexture(QOpenGLTexture.Target2D)
self.texture2.create()
self.texture2.bind(self.texUnit2)
self.texture2.setData(self.image2)
self.texture2.setMinMagFilters(QOpenGLTexture.Linear,
QOpenGLTexture.Linear)
self.texture2.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self.texture2.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
self.vbo.release()
vaoBinder = None
print("gl initialized")
def paintGL(self):
"drawing loop"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT | pygl.GL_DEPTH_BUFFER_BIT)
self.vao.bind()
self.vbo.bind()
# actual drawing
self.program.bind()
# set projection matrix
projectionMatrix = QMatrix4x4()
projectionMatrix.perspective(self.camera.zoom,
self.width() / self.height(), 0.2, 100.0)
self.program.setUniformValue('projection', projectionMatrix)
# set view/camera matrix
viewMatrix = self.camera.getViewMatrix()
self.program.setUniformValue('view', viewMatrix)
# bind textures
for i, pos in enumerate(self.cubeCoords):
#
cubeModel = QMatrix4x4()
cubeModel.translate(pos)
angle = 30 * i
cubeModel.rotate(angle, self.rotateVector)
self.program.setUniformValue("model", cubeModel)
self.texture1.bind(self.texUnit1)
self.texture2.bind(self.texUnit2)
funcs.glDrawArrays(pygl.GL_TRIANGLES, 0, 36)
self.vbo.release()
self.program.release()
self.texture1.release()
self.texture2.release()
class RenderWindow(QWindow):
def __init__(self, format):
super(RenderWindow, self).__init__()
self.setSurfaceType(QWindow.OpenGLSurface)
self.setFormat(format)
self.context = QOpenGLContext(self)
self.context.setFormat(self.requestedFormat())
if not self.context.create():
raise Exception("Unable to create GL context")
self.program = None
self.timer = None
self.angle = 0
def initGl(self):
self.program = QOpenGLShaderProgram(self)
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer()
format = self.context.format()
useNewStyleShader = format.profile() == QSurfaceFormat.CoreProfile
# Try to handle 3.0 & 3.1 that do not have the core/compatibility profile
# concept 3.2+ has. This may still fail since version 150 (3.2) is
# specified in the sources but it's worth a try.
if (format.renderableType() == QSurfaceFormat.OpenGL and format.majorVersion() == 3
and format.minorVersion() <= 1):
useNewStyleShader = not format.testOption(QSurfaceFormat.DeprecatedFunctions)
vertexShader = vertexShaderSource if useNewStyleShader else vertexShaderSource110
fragmentShader = fragmentShaderSource if useNewStyleShader else fragmentShaderSource110
if not self.program.addShaderFromSourceCode(QOpenGLShader.Vertex, vertexShader):
raise Exception("Vertex shader could not be added: {} ({})".format(self.program.log(), vertexShader))
if not self.program.addShaderFromSourceCode(QOpenGLShader.Fragment, fragmentShader):
raise Exception("Fragment shader could not be added: {} ({})".format(self.program.log(), fragmentShader))
if not self.program.link():
raise Exception("Could not link shaders: {}".format(self.program.log()))
self.posAttr = self.program.attributeLocation("posAttr")
self.colAttr = self.program.attributeLocation("colAttr")
self.matrixUniform = self.program.uniformLocation("matrix")
self.vbo.create()
self.vbo.bind()
self.verticesData = vertices.tobytes()
self.colorsData = colors.tobytes()
verticesSize = 4 * vertices.size
colorsSize = 4 * colors.size
self.vbo.allocate(VoidPtr(self.verticesData), verticesSize + colorsSize)
self.vbo.write(verticesSize, VoidPtr(self.colorsData), colorsSize)
self.vbo.release()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
if self.vao.isCreated(): # have VAO support, use it
self.setupVertexAttribs()
def setupVertexAttribs(self):
self.vbo.bind()
self.program.setAttributeBuffer(self.posAttr, GL.GL_FLOAT, 0, 2)
self.program.setAttributeBuffer(self.colAttr, GL.GL_FLOAT, 4 * vertices.size, 3)
self.program.enableAttributeArray(self.posAttr)
self.program.enableAttributeArray(self.colAttr)
self.vbo.release()
def exposeEvent(self, event):
if self.isExposed():
self.render()
if self.timer is None:
self.timer = QTimer(self)
self.timer.timeout.connect(self.slotTimer)
self.timer.start(10)
def render(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
if self.program is None:
functions.glEnable(GL.GL_DEPTH_TEST)
functions.glClearColor(0, 0, 0, 1)
self.initGl()
functions.glViewport(0, 0, self.width(), self.height())
functions.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
self.program.bind()
matrix = QMatrix4x4()
matrix.perspective(60, 4 / 3, 0.1, 100)
matrix.translate(0, 0, -2)
matrix.rotate(self.angle, 0, 1, 0)
self.program.setUniformValue(self.matrixUniform, matrix)
if self.vao.isCreated():
self.vao.bind()
else: # no VAO support, set the vertex attribute arrays now
self.setupVertexAttribs()
functions.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
self.vao.release()
self.program.release()
# swapInterval is 1 by default which means that swapBuffers() will (hopefully) block
# and wait for vsync.
self.context.swapBuffers(self)
self.context.doneCurrent()
def slotTimer(self):
self.render()
self.angle += 1
def glInfo(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
text = "Vendor: {}\nRenderer: {}\nVersion: {}\nShading language: {}".format(
functions.glGetString(GL.GL_VENDOR), functions.glGetString(GL.GL_RENDERER),
functions.glGetString(GL.GL_VERSION),
functions.glGetString(GL.GL_SHADING_LANGUAGE_VERSION))
self.context.doneCurrent()
return text
class TriangleGL(QOpenGLWidget):
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
# shaders etc
triangleTutoDir = os.path.dirname(__file__)
trianglePardir = os.path.join(triangleTutoDir, os.pardir)
mediaDir = os.path.join(trianglePardir, "media")
shaderDir = os.path.join(mediaDir, "shaders")
availableShaders = ["triangle", "triangle2"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
} for name in availableShaders
}
self.core = "--coreprofile" in QCoreApplication.arguments()
# opengl data related
self.context = QOpenGLContext()
self.vao1 = QOpenGLVertexArrayObject()
self.vbo1 = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.vao2 = QOpenGLVertexArrayObject()
self.vbo2 = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.program1 = QOpenGLShaderProgram()
self.program2 = QOpenGLShaderProgram()
# some vertex data for corners of triangle
self.vertexData1 = np.array(
[0.9, 0.9, 0.0, # x, y, z
0.9, 0.7, 0.0, # x, y, z
0.7, 0.9, 0.0], # x, y, z
dtype=ctypes.c_float
)
self.vertexData2 = np.array(
[-0.9, -0.9, 0.0, # x, y, z
-0.9, -0.7, 0.0, # x, y, z
-0.7, -0.9, 0.0], # x, y, z
dtype=ctypes.c_float
)
# triangle color
self.triangleColor1 = QVector4D(1.0, 0.0, 0.0, 0.0) # yellow triangle
self.triangleColor2 = QVector4D(
0.0, 0.0, 0.5, 0.0) # not yellow triangle
def loadShader(self,
shaderName: str,
shaderType: str):
"Load shader"
shader = self.shaders[shaderName]
shaderSourcePath = shader[shaderType]
if shaderType == "vertex":
shader = QOpenGLShader(QOpenGLShader.Vertex)
else:
shader = QOpenGLShader(QOpenGLShader.Fragment)
#
isCompiled = shader.compileSourceFile(shaderSourcePath)
if isCompiled is False:
print(shader.log())
raise ValueError(
"{0} shader {2} known as {1} is not compiled".format(
shaderType, shaderName, shaderSourcePath
)
)
return shader
def loadVertexShader(self, shaderName: str):
"load vertex shader"
return self.loadShader(shaderName, "vertex")
def loadFragmentShader(self, shaderName: str):
"load fragment shader"
return self.loadShader(shaderName, "fragment")
def getGlInfo(self):
"Get opengl info"
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(
pygl.glGetString(pygl.GL_VENDOR),
pygl.glGetString(pygl.GL_RENDERER),
pygl.glGetString(pygl.GL_VERSION),
pygl.glGetString(pygl.GL_SHADING_LANGUAGE_VERSION)
)
return info
def initializeGL(self):
print('gl initial')
print(self.getGlInfo())
# create context and make it current
self.context.create()
self.context.aboutToBeDestroyed.connect(self.cleanUpGl)
# initialize functions
funcs = self.context.functions()
funcs.initializeOpenGLFunctions()
funcs.glClearColor(1, 1, 1, 1)
# deal with shaders
# first shader
shaderName = "triangle"
vshader = self.loadVertexShader(shaderName)
fshader = self.loadFragmentShader(shaderName)
# creating shader program
self.program1 = QOpenGLShaderProgram(self.context)
self.program1.addShader(vshader) # adding vertex shader
self.program1.addShader(fshader) # adding fragment shader
# bind attribute to a location
self.program1.bindAttributeLocation("aPos", 0)
# link shader program1
isLinked = self.program1.link()
print("shader program1 is linked: ", isLinked)
# bind the program1
self.program1.bind()
# specify uniform value
colorLoc = self.program1.uniformLocation("color")
self.program1.setUniformValue(colorLoc,
self.triangleColor1)
# second shader
shaderName = "triangle2"
vshader = self.loadVertexShader(shaderName)
fshader = self.loadFragmentShader(shaderName)
#
self.program2 = QOpenGLShaderProgram(self.context)
self.program2.addShader(vshader) # adding vertex shader
self.program2.addShader(fshader) # adding fragment shader
# bind attribute to a location
self.program2.bindAttributeLocation("aPos", 0)
# link shader program2
isLinked = self.program2.link()
print("shader program2 is linked: ", isLinked)
# bind the program2
self.program2.bind()
# specify uniform value
colorLoc = self.program2.uniformLocation("color")
self.program2.setUniformValue(colorLoc,
self.triangleColor2)
# self.useShader("triangle")
# deal with vao and vbo
# create vao and vbo
# vao
isVao = self.vao1.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao1)
# vbo
isVbo = self.vbo1.create()
isBound = self.vbo1.bind()
# check if vao and vbo are created
print('vao created: ', isVao)
print('vbo created: ', isVbo)
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate space on buffer
self.vbo1.allocate(self.vertexData1.tobytes(),
floatSize * self.vertexData1.size)
funcs.glEnableVertexAttribArray(0)
nullptr = VoidPtr(0)
funcs.glVertexAttribPointer(0,
3,
int(pygl.GL_FLOAT),
int(pygl.GL_FALSE),
3 * floatSize,
nullptr)
self.vbo1.release()
vaoBinder = None
# second triangle vao vbo
# vao
isVao = self.vao2.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao2)
# vbo
isVbo = self.vbo2.create()
isBound = self.vbo2.bind()
# check if vao and vbo are created
print('vao created: ', isVao)
print('vbo created: ', isVbo)
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate space on buffer
self.vbo2.allocate(self.vertexData2.tobytes(),
floatSize * self.vertexData2.size)
funcs.glEnableVertexAttribArray(0)
nullptr = VoidPtr(0)
funcs.glVertexAttribPointer(0,
3,
int(pygl.GL_FLOAT),
int(pygl.GL_FALSE),
3 * floatSize,
nullptr)
self.vbo2.release()
self.program2.release()
def cleanUpGl(self):
"Clean up everything"
self.context.makeCurrent()
self.vbo.destroy()
del self.program
self.program = None
self.doneCurrent()
def resizeGL(self, width: int, height: int):
"Resize the viewport"
funcs = self.context.functions()
funcs.glViewport(0, 0, width, height)
def paintGL(self):
"drawing loop"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT)
# actual drawing
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao1)
self.program1.bind()
funcs.glDrawArrays(pygl.GL_TRIANGLES, # mode
0, # first
3) # count
vaoBinder = None
self.program1.release()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao2)
self.program2.bind()
funcs.glDrawArrays(pygl.GL_TRIANGLES, # mode
0, # first
3) # count
vaoBinder = None
self.program2.release()
class SquareObject(QObject):
def __init__(self, parent=None):
super(SquareObject, self).__init__(parent=parent)
self.initialize_shader_program()
self.initialize_geometry()
self.initialize_geometry_on_gpu()
def initialize_shader_program(self):
self.vertex_shader = """
#version 330 core
layout (location = 0) in vec3 in_coords;
layout (location = 1) in vec3 in_color;
out vec3 out_color;
void main()
{
gl_Position = vec4(in_coords, 1.0);
gl_PointSize = 200.0;
out_color = in_color;
}
"""
self.fragment_shader = """
#version 330 core
in vec3 out_color;
out vec4 frag_color;
void main()
{
frag_color = vec4(out_color, 1.0);
}
"""
self.arg_pos = {'in_coords': 0, 'in_color': 1, 'out_color': 0}
self.program = QOpenGLShaderProgram(parent=self.parent())
self.program.addCacheableShaderFromSourceCode(QOpenGLShader.Vertex,
self.vertex_shader)
self.program.addCacheableShaderFromSourceCode(QOpenGLShader.Fragment,
self.fragment_shader)
self.program.link()
def initialize_geometry(self):
self.vertices = np.array(
[
# coords color
[0.5, 0.5, 0.0, 1.0, 0.0, 0.0], # top-right
[0.5, -0.5, 0.0, 0.0, 1.0, 0.0], # bottom-right
[-0.5, -0.5, 0.0, 0.0, 0.0, 1.0], # bottom-left
[-0.5, 0.5, 0.0, 1.0, 1.0, 0.0] # top-left
],
dtype=np.float32)
self.triangles = np.array([[0, 1, 2], [2, 3, 0]], dtype=np.int32)
def initialize_geometry_on_gpu(self):
self.vao = QOpenGLVertexArrayObject(self.parent())
if not self.vao.create():
raise ValueError('Could not create VAO')
self.vao.bind()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
if not self.vbo.create():
raise ValueError('Could not create VBO')
self.vbo.bind()
self.vbo.setUsagePattern(QOpenGLBuffer.StaticDraw)
vertices_data = self.vertices.tostring()
self.vbo.allocate(len(vertices_data))
self.vbo.write(0, vertices_data, len(vertices_data))
self.ebo = QOpenGLBuffer(QOpenGLBuffer.IndexBuffer)
if not self.ebo.create():
raise ValueError('Could not create EBO')
self.ebo.bind()
self.ebo.setUsagePattern(QOpenGLBuffer.StaticDraw)
triangles_data = self.triangles.tostring()
self.ebo.allocate(len(triangles_data))
self.ebo.write(0, triangles_data, len(triangles_data))
self.program.enableAttributeArray(self.arg_pos['in_coords'])
self.program.setAttributeBuffer(
self.arg_pos['in_coords'], gl.GL_FLOAT, 0, 3,
self.vertices.shape[1] * self.vertices.dtype.itemsize)
self.program.enableAttributeArray(self.arg_pos['in_color'])
self.program.setAttributeBuffer(
self.arg_pos['in_color'], gl.GL_FLOAT,
3 * self.vertices.dtype.itemsize, 3,
self.vertices.shape[1] * self.vertices.dtype.itemsize)
self.vao.release()
self.vbo.release()
self.ebo.release()
def render(self):
self.program.bind()
self.vao.bind()
gl.glDrawElements(gl.GL_TRIANGLES, self.triangles.size,
gl.GL_UNSIGNED_INT, None)
self.program.release()
class GLWidget(QOpenGLWidget, QOpenGLFunctions):
xRotationChanged = Signal(int)
yRotationChanged = Signal(int)
zRotationChanged = Signal(int)
zoomChanged = Signal(int)
fileSaved = Signal()
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
QOpenGLFunctions.__init__(self)
self.core = "--coreprofile" in QCoreApplication.arguments()
self.xRot = 0
self.yRot = 0
self.zRot = 4327
self.zoom = 0
self.lastPos = 0
self.lithophane = Lithophane()
self.vao = QOpenGLVertexArrayObject()
self.lithophaneVbo = QOpenGLBuffer()
self.program = QOpenGLShaderProgram()
self.projMatrixLoc = 0
self.mvMatrixLoc = 0
self.normalMatrixLoc = 0
self.lightPosLoc = 0
self.proj = QMatrix4x4()
self.camera = QMatrix4x4()
self.world = QMatrix4x4()
self.transparent = "--transparent" in QCoreApplication.arguments()
if self.transparent:
fmt = self.format()
fmt.setAlphaBufferSize(8)
self.setFormat(fmt)
def updateImage(self, img_scr):
self.fileDir = img_scr
self.lithophane.generateVertex(img_scr)
self.initializeGL()
def generateSTL(self,file_name):
file=open(file_name, "w")
file.write("solid lithophane\n")
i=0
v_data=[]
while(i <= self.lithophane.m_count):
n1=self.lithophane.m_data[i]
i+=1
n2=self.lithophane.m_data[i]
i+=1
n3=self.lithophane.m_data[i]
i+=1
v1=self.lithophane.m_data[i]
i+=1
v2=self.lithophane.m_data[i]
i+=1
v3=self.lithophane.m_data[i]
i+=1
v_data.append([n1,n2,n3])
triangle_count = 0
for i in range(0,len(v_data)-1,4):
q1 = v_data[i]
q2 = v_data[i+1]
q3 = v_data[i+2]
q4 = v_data[i+3]
file.write("facet normal 0.0 0.0 0.0\n")
file.write(" outer loop\n")
file.write(" vertex {} {} {}\n".format(np.float32(q1[0]),np.float32(q1[1]),np.float32(q1[2])))
file.write(" vertex {} {} {}\n".format(np.float32(q2[0]),np.float32(q2[1]),np.float32(q2[2])))
file.write(" vertex {} {} {}\n".format(np.float32(q4[0]),np.float32(q4[1]),np.float32(q4[2])))
file.write(" end loop\n")
file.write("endfacet\n")
file.write("facet normal 0.0 0.0 0.0\n")
file.write(" outer loop\n")
file.write(" vertex {} {} {}\n".format(np.float32(q2[0]),np.float32(q2[1]),np.float32(q2[2])))
file.write(" vertex {} {} {}\n".format(np.float32(q3[0]),np.float32(q3[1]),np.float32(q3[2])))
file.write(" vertex {} {} {}\n".format(np.float32(q4[0]),np.float32(q4[1]),np.float32(q4[2])))
file.write(" end loop\n")
file.write("endfacet\n")
triangle_count+=2
print("Written {} triangles".format(triangle_count))
file.close()
self.fileSaved.emit()
def xRotation(self):
return self.xRot
def yRotation(self):
return self.yRot
def zRotation(self):
return self.zRot
def minimumSizeHint(self):
return QSize(50, 50)
def sizeHint(self):
return QSize(400, 400)
def normalizeAngle(self, angle):
while angle < 0:
angle += 360 * 16
while angle > 360 * 16:
angle -= 360 * 16
return angle
def setXRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.xRot:
self.xRot = angle
self.emit(SIGNAL("xRotationChanged(int)"), angle)
self.update()
def setYRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.yRot:
self.yRot = angle
self.emit(SIGNAL("yRotationChanged(int)"), angle)
self.update()
def setZRotation(self, angle):
angle = self.normalizeAngle(angle)
if angle != self.zRot:
self.zRot = angle
self.emit(SIGNAL("zRotationChanged(int)"), angle)
print(angle)
self.update()
def setZoom(self, val):
if val != self.zoom:
self.zoom = -val
self.emit(SIGNAL("zoomChanged(int)"), val)
self.update()
def applyParams(self, minT, maxT, step_size):
if not self.fileDir:
return
self.lithophane.setParams(minT,maxT,step_size)
self.updateImage(self.fileDir)
def cleanup(self):
self.makeCurrent()
self.lithophaneVbo.destroy()
del self.program
self.program = None
self.doneCurrent()
def vertexShaderSourceCore(self):
return """#version 150
in vec4 vertex;
in vec3 normal;
out vec3 vert;
out vec3 vertNormal;
uniform mat4 projMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
void main() {
vert = vertex.xyz;
vertNormal = normalMatrix * normal;
gl_Position = projMatrix * mvMatrix * vertex;
}"""
def fragmentShaderSourceCore(self):
return """#version 150
in highp vec3 vert;
in highp vec3 vertNormal;
out highp vec4 fragColor;
uniform highp vec3 lightPos;
void main() {
highp vec3 L = normalize(lightPos - vert);
highp float NL = max(dot(normalize(vertNormal), L), 0.0);
highp vec3 color = vec3(0.39, 1.0, 0.0);
highp vec3 col = clamp(color * 0.2 + color * 0.8 * NL, 0.0, 1.0);
fragColor = vec4(col, 1.0);
}"""
def vertexShaderSource(self):
return """attribute vec4 vertex;
attribute vec3 normal;
varying vec3 vert;
varying vec3 vertNormal;
uniform mat4 projMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
void main() {
vert = vertex.xyz;
vertNormal = normalMatrix * normal;
gl_Position = projMatrix * mvMatrix * vertex;
}"""
def fragmentShaderSource(self):
return """varying highp vec3 vert;
varying highp vec3 vertNormal;
uniform highp vec3 lightPos;
void main() {
highp vec3 L = normalize(lightPos - vert);
highp float NL = max(dot(normalize(vertNormal), L), 0.0);
highp vec3 color = vec3(0.39, 1.0, 0.0);
highp vec3 col = clamp(color * 0.2 + color * 0.8 * NL, 0.0, 1.0);
gl_FragColor = vec4(col, 1);
}"""
def initializeGL(self):
self.context().aboutToBeDestroyed.connect(self.cleanup)
self.initializeOpenGLFunctions()
self.glClearColor(0, 0, 0, 1)
self.program = QOpenGLShaderProgram()
if self.core:
self.vertexShader = self.vertexShaderSourceCore()
self.fragmentShader = self.fragmentShaderSourceCore()
else:
self.vertexShader = self.vertexShaderSource()
self.fragmentShader = self.fragmentShaderSource()
self.program.addShaderFromSourceCode(QOpenGLShader.Vertex, self.vertexShader)
self.program.addShaderFromSourceCode(QOpenGLShader.Fragment, self.fragmentShader)
self.program.bindAttributeLocation("vertex", 0)
self.program.bindAttributeLocation("normal", 1)
self.program.link()
self.program.bind()
self.projMatrixLoc = self.program.uniformLocation("projMatrix")
self.mvMatrixLoc = self.program.uniformLocation("mvMatrix")
self.normalMatrixLoc = self.program.uniformLocation("normalMatrix")
self.lightPosLoc = self.program.uniformLocation("lightPos")
self.vao.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.lithophaneVbo.create()
self.lithophaneVbo.bind()
float_size = ctypes.sizeof(ctypes.c_float)
self.lithophaneVbo.allocate(self.lithophane.constData(), 300000 *6 * float_size)
self.setupVertexAttribs()
self.camera.setToIdentity()
self.camera.translate(0, 0, -90)
self.program.setUniformValue(self.lightPosLoc, QVector3D(10, 0, 20))
self.program.release()
vaoBinder = None
def setupVertexAttribs(self):
self.lithophaneVbo.bind()
f = QOpenGLContext.currentContext().functions()
f.glEnableVertexAttribArray(0)
f.glEnableVertexAttribArray(1)
float_size = ctypes.sizeof(ctypes.c_float)
null = VoidPtr(0)
pointer = VoidPtr(3 * float_size)
f.glVertexAttribPointer(0, 3, int(GL.GL_FLOAT), int(GL.GL_FALSE), 6 * float_size, null)
f.glVertexAttribPointer(1, 3, int(GL.GL_FLOAT), int(GL.GL_FALSE), 6 * float_size, pointer)
self.lithophaneVbo.release()
def paintGL(self):
self.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
self.glEnable(GL.GL_DEPTH_TEST)
self.glEnable(GL.GL_CULL_FACE)
self.world.setToIdentity()
self.world.rotate(self.xRot / 16, 1, 0, 0)
self.world.rotate(self.yRot / 16, 0, 1, 0)
self.world.rotate(self.zRot / 16, 0, 0, 1)
self.camera.setToIdentity()
self.camera.translate(0,0,self.zoom)
self.world.translate(-self.lithophane.width*0.5*0.2,-self.lithophane.height*0.5*0.2 , 0)
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.program.bind()
self.program.setUniformValue(self.projMatrixLoc, self.proj)
self.program.setUniformValue(self.mvMatrixLoc, self.camera * self.world)
normalMatrix = self.world.normalMatrix()
self.program.setUniformValue(self.normalMatrixLoc, normalMatrix)
self.glDrawArrays(GL.GL_QUADS, 0, self.lithophane.vertexCount())
self.program.release()
vaoBinder = None
def resizeGL(self, width, height):
self.proj.setToIdentity()
self.proj.perspective(45, width / height, 0.01, 1000)
def mousePressEvent(self, event):
self.lastPos = QPoint(event.pos())
def mouseMoveEvent(self, event):
dx = event.x() - self.lastPos.x()
dy = event.y() - self.lastPos.y()
if event.buttons() & Qt.LeftButton:
self.setXRotation(self.xRot + 8 * dy)
self.setYRotation(self.yRot + 8 * dx)
elif event.buttons() & Qt.RightButton:
self.setXRotation(self.xRot + 8 * dy)
self.setZRotation(self.zRot + 8 * dx)
self.lastPos = QPoint(event.pos())
class RectangleGL(QOpenGLWidget):
"Texture loading opengl widget"
def __init__(self, parent=None):
"Constructor"
QOpenGLWidget.__init__(self, parent)
tutoTutoDir = os.path.dirname(__file__)
tutoPardir = os.path.join(tutoTutoDir, os.pardir)
tutoPardir = os.path.realpath(tutoPardir)
mediaDir = os.path.join(tutoPardir, "media")
shaderDir = os.path.join(mediaDir, "shaders")
#
availableShaders = ["rectangle", "triangle"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
}
for name in availableShaders
}
self.core = "--coreprofile" in QCoreApplication.arguments()
# opengl data related
self.context = QOpenGLContext()
self.program = QOpenGLShaderProgram()
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.indices = np.array(
[
0,
1,
3, # first triangle
1,
2,
3 # second triangle
],
dtype=ctypes.c_uint)
# vertex data of the panel that would hold the image
self.vertexData = np.array(
[
# viewport position || colors || texture coords
0.5,
0.5,
0.0, # top right
0.5,
-0.5,
0.0, # bottom right
-0.5,
-0.5,
0.0, # bottom left
-0.5,
0.5,
0.0, # top left
],
dtype=ctypes.c_float)
self.rectColor = QVector4D(0.0, 1.0, 1.0, 0.0)
def loadShader(self, shaderName: str, shaderType: str):
"Load shader"
shader = self.shaders[shaderName]
shaderSourcePath = shader[shaderType]
if shaderType == "vertex":
shader = QOpenGLShader(QOpenGLShader.Vertex)
else:
shader = QOpenGLShader(QOpenGLShader.Fragment)
#
isCompiled = shader.compileSourceFile(shaderSourcePath)
if isCompiled is False:
print(shader.log())
raise ValueError(
"{0} shader {2} known as {1} is not compiled".format(
shaderType, shaderName, shaderSourcePath))
return shader
def loadVertexShader(self, shaderName: str):
"load vertex shader"
return self.loadShader(shaderName, "vertex")
def loadFragmentShader(self, shaderName: str):
"load fragment shader"
return self.loadShader(shaderName, "fragment")
def getGlInfo(self):
"Get opengl info"
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(pygl.glGetString(pygl.GL_VENDOR),
pygl.glGetString(pygl.GL_RENDERER),
pygl.glGetString(pygl.GL_VERSION),
pygl.glGetString(pygl.GL_SHADING_LANGUAGE_VERSION))
return info
def cleanUpGl(self):
"Clean up everything"
self.context.makeCurrent()
del self.program
self.program = None
self.vbo.release()
self.doneCurrent()
def resizeGL(self, width: int, height: int):
"Resize the viewport"
funcs = self.context.functions()
funcs.glViewport(0, 0, width, height)
def initializeGL(self):
"Initialize opengl "
print('gl initial')
print(self.getGlInfo())
# create context and make it current
self.context.create()
self.context.aboutToBeDestroyed.connect(self.cleanUpGl)
# initialize functions
funcs = self.context.functions()
funcs.initializeOpenGLFunctions()
funcs.glClearColor(1, 1, 1, 1)
# shader
shaderName = "triangle"
vshader = self.loadVertexShader(shaderName)
fshader = self.loadFragmentShader(shaderName)
# create shader program
self.program = QOpenGLShaderProgram(self.context)
self.program.addShader(vshader)
self.program.addShader(fshader)
# bind attribute location
self.program.bindAttributeLocation("aPos", 0)
# link shader program
isLinked = self.program.link()
print("shader program is linked: ", isLinked)
# activate shader program to set uniform an attribute values
self.program.bind()
# specify uniform value
colorLoc = self.program.uniformLocation("color")
self.program.setUniformValue(colorLoc, self.rectColor)
# vao, vbo, texture
# vao
isVao = self.vao.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
# vbo
isVbo = self.vbo.create()
isVboBound = self.vbo.bind()
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate vbo
self.vbo.allocate(self.vertexData.tobytes(),
floatSize * self.vertexData.size)
print("vao created: ", isVao)
print("vbo created: ", isVbo)
print("vbo bound: ", isVboBound)
# dealing with attributes
# vertex array position
funcs.glVertexAttribPointer(0, 3, int(pygl.GL_FLOAT),
int(pygl.GL_FALSE), 3 * floatSize,
VoidPtr(0))
funcs.glEnableVertexAttribArray(0)
self.vbo.release()
vaoBinder = None
def paintGL(self):
"paint gl"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT)
# bind texture
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.program.bind()
# draw stuff
funcs.glDrawElements(pygl.GL_TRIANGLES, self.indices.size,
pygl.GL_UNSIGNED_INT, self.indices.tobytes())
# VoidPtr(self.indices.tobytes() * ctypes.sizeof(ctypes.c_uint)))
vaoBinder = None
self.program.release()