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 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 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 SquircleRenderer(QObject):
def __init__(self, parent=None):
super().__init__(parent)
self._shader_program = None
self._t = 0.0
self._viewport_size = QSize()
self._window = None
def set_viewport_size(self, viewport_size):
self._viewport_size = viewport_size
def set_t(self, t):
self._t = t
def set_window(self, window):
self._window = window
@Slot()
def paint(self):
try:
print("drawing")
if self._shader_program is None:
self._shader_program = QOpenGLShaderProgram()
self._shader_program.addShaderFromSourceCode(
QOpenGLShader.Vertex, "attribute highp vec4 vertices;"
"varying highp vec2 coords;"
"void main() {"
" gl_Position = vertices;"
" coords = vertices.xy;"
"}")
self._shader_program.addShaderFromSourceCode(
QOpenGLShader.Fragment, "uniform lowp float t;"
"varying highp vec2 coords;"
"void main() {"
" lowp float i = 1. - (pow(abs(coords.x), 4.) + pow(abs(coords.y), 4.));"
" i = smoothstep(t - 0.8, t + 0.8, i);"
" i = floor(i * 20.) / 20.;"
" gl_FragColor = vec4(coords * .5 + .5, i, i);"
"}")
self._shader_program.bindAttributeLocation('vertices', 0)
self._shader_program.link()
self._shader_program.bind()
self._shader_program.enableAttributeArray(0)
values = np.array([(-1.0, -1.0), (1.0, -1.0), (-1.0, 1.0),
(1.0, 1.0)],
dtype=ctypes.c_float)
self._shader_program.setAttributeArray(0, GL_FLOAT,
values.tobytes(), 2)
self._shader_program.setUniformValue1f('t', self._t)
gl = self._window.openglContext().functions()
gl.glViewport(0, 0, self._viewport_size.width(),
self._viewport_size.height())
gl.glDisable(GL_DEPTH_TEST)
gl.glClearColor(0.1, 0.1, 0.1, 1)
gl.glClear(GL_COLOR_BUFFER_BIT)
gl.glEnable(GL_BLEND)
gl.glBlendFunc(GL_SRC_ALPHA, GL_ONE)
gl.glDrawArrays(GL_TRIANGLE_STRIP, 0, 4)
self._shader_program.disableAttributeArray(0)
self._shader_program.release()
self._window.resetOpenGLState()
except Exception as e:
print(e)
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 Shader(SceneState):
def __init__(self, scene, filename):
super(Shader, self).__init__(scene, filename)
self.path = Path(__file__).parent.parent / 'shaders'
self.filename = filename
self.mtime = 0
self.program = None
def toJSON(self):
data = super(Shader, self).toJSON()
data['filename'] = self.filename
return data
def setAttributeArray(self, name, gltype, offset=0, count=3, stride=0):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.setAttributeBuffer(name, gltype, offset, count, stride)
self.program.enableAttributeArray(name)
def unsetAttributeArray(self, name):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.disableAttributeArray(name)
def setValue(self, name, v):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.setUniformValue(name, v)
def setValues(self, name, *values):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.setUniformValue(name, *values)
def setVector2(self, name, v):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.setUniformValue(name, QVector2D(*v.flat))
def setVector3(self, name, v):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.setUniformValue(name, QVector3D(*v.flat))
def setVector4(self, name, v):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.setUniformValue(name, QVector4D(*v.flat))
def setMatrix4x4(self, name, m):
if self.enabled <= 0:
raise Exception("shader must be enabled")
self.program.setUniformValue(name, QMatrix4x4(*m.flat))
def setUniforms(self, uniforms):
if self.enabled <= 0:
raise Exception("shader must be enabled")
for (name, values) in uniforms.items():
self.program.setUniformValue(name, *values)
def oncleanup(self):
for item in list(self.deps):
item.detachShader(self)
super(Shader, self).oncleanup()
def createimpl(self, gl):
if not self.filename:
raise Exception("missing program filename")
self.program = QOpenGLShaderProgram()
self.mtime = max(
os.stat(self.path / ('%s.vs' % self.filename)).st_mtime,
os.stat(self.path / ('%s.fs' % self.filename)).st_mtime)
with io.open(self.path / ('%s.vs' % self.filename), 'r') as f:
self.program.addShaderFromSourceCode(QOpenGLShader.Vertex,
f.read())
with io.open(self.path / ('%s.fs' % self.filename), 'r') as f:
self.program.addShaderFromSourceCode(QOpenGLShader.Fragment,
f.read())
if not self.program.link():
raise Exception("invalid program")
def updateimpl(self, gl):
if not self.filename:
raise Exception("missing program filename")
mtime = max(
os.stat(self.path / ('%s.vs' % self.filename)).st_mtime,
os.stat(self.path / ('%s.fs' % self.filename)).st_mtime)
if mtime == self.mtime:
return
self.destroyimpl(gl)
self.createimpl(gl)
def destroyimpl(self, gl):
self.program.removeAllShaders()
# self.program.destroy()
self.program = None
def enableimpl(self, gl, camera, shader):
self.program.bind()
def disableimpl(self, gl, camera, shader):
self.program.release()