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 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 TGLViewport(QOpenGLWidget, QOpenGLFunctions):
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
QOpenGLFunctions.__init__(self)
self.setMinimumSize(32, 32)
self.info = ""
self._supported_images = [
"TGA", "PNG", "JPG", "JPEG", "TIF", "TIFF", "BMP", "DDS"
]
# indices
indices = [0, 1, 3, 1, 2, 3]
self._indices = array('I', indices)
# vertices
# 3 position | 2 texture coord
vertex = [
1.0,
1.0,
0.0,
1.0,
1.0, # top right
1.0,
-1.0,
0.0,
1.0,
0.0, # bottom right
-1.0,
-1.0,
0.0,
0.0,
0.0, # bottom left
-1.0,
1.0,
0.0,
0.0,
1.0 # top left
]
self._vertex = array('f', vertex)
# opengl data related
self._program = QOpenGLShaderProgram()
self._program_bg = QOpenGLShaderProgram()
self._vao = QOpenGLVertexArrayObject()
self._vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self._texture = None
self._texture_size = (1, 1)
self._location = ()
self._colors_default = (QColor.fromRgbF(0.65, 0.65, 0.65, 1.0),
QColor.fromRgbF(0.90, 0.90, 0.90, 1.0))
self._u_colors = self._colors_default
self._height = QVector4D(0, self.height(), 0, 0)
self._u_channels = QMatrix4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0,
0, 0)
def initializeGL(self):
# Set up the rendering context, define display lists etc.
self.initializeOpenGLFunctions()
self.glClearColor(0.2, 0.0, 0.2, 0.0)
self.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
# shader code (OpenGL ES)
# texture
vs_source_es = """
attribute highp vec3 Pos;
attribute highp vec2 UV;
uniform highp vec2 Scale;
varying highp vec2 oUV;
void main() {
gl_Position = vec4(Pos * vec3(Scale, 1.0), 1.0);
oUV = UV;
}
"""
ps_source_es = """
varying highp vec2 oUV;
uniform sampler2D Texture;
uniform highp mat4 Channels;
uniform highp vec4 Add;
void main() {
gl_FragColor = texture2D(Texture, oUV * vec2(1.0, -1.0)) * Channels;
gl_FragColor.a += (1.0 - Channels[3][3]);
}
"""
# background
vs_grid_es = """
attribute highp vec3 Pos;
void main() {
gl_Position = vec4(Pos, 1.0);
}
"""
ps_grid_es = """
uniform highp vec4 Color1;
uniform highp vec4 Color2;
uniform highp vec4 Height;
void main() {
highp vec2 a = floor((Height.xy - gl_FragCoord.xy) / 64.0);
highp float even = mod(a.x + a.y, 2.0);
highp vec3 c = mix(Color1.rgb, Color2.rgb, even);
gl_FragColor = vec4(c, 1);
}
"""
# program - texture
# shader
vs = self.__create_shader(QOpenGLShader.Vertex, vs_source_es)
fs = self.__create_shader(QOpenGLShader.Fragment, ps_source_es)
# program
self._program = QOpenGLShaderProgram(self.context())
self._program.addShader(vs)
self._program.addShader(fs)
# attribute location
self._program.bindAttributeLocation("Pos", 0)
self._program.bindAttributeLocation("UV", 1)
# link program
r = self._program.link()
# program - background
# shader
vs = self.__create_shader(QOpenGLShader.Vertex, vs_grid_es)
fs = self.__create_shader(QOpenGLShader.Fragment, ps_grid_es)
# program
self._program_bg = QOpenGLShaderProgram(self.context())
self._program_bg.addShader(vs)
self._program_bg.addShader(fs)
# attribute location
self._program_bg.bindAttributeLocation("Pos", 0)
# link program
r = self._program_bg.link()
# uniform locations
self._location = (
self._program.uniformLocation("Scale"),
self._program.uniformLocation("Channels"),
self._program_bg.uniformLocation("Color1"),
self._program_bg.uniformLocation("Color2"),
self._program_bg.uniformLocation("Height"),
)
# vao
r = self._vao.create()
r = self._vao.bind()
# vbo
r = self._vbo.create()
self._vbo.setUsagePattern(QOpenGLBuffer.StaticDraw)
r = self._vbo.bind()
sz_float = ctypes.sizeof(ctypes.c_float)
self._vbo.allocate(self._vertex.tobytes(),
sz_float * len(self._vertex))
self._vao.release()
# texture
self.set_texture(r"C:")
def resizeGL(self, width, height):
self.__update_scale(width, height)
self._height = QVector4D(0, self.height(), 0, 0)
self.glViewport(0, 0, width, height)
def paintGL(self):
SZ_FLOAT = ctypes.sizeof(ctypes.c_float)
# draw the scene
self.glClear(GL.GL_COLOR_BUFFER_BIT)
self._vao.bind()
# background
self._program_bg.bind()
self._program.setAttributeBuffer(0, GL.GL_FLOAT, 0, 3, 5 * SZ_FLOAT)
self._program.enableAttributeArray(0)
self._program.setUniformValue(self._location[2], self._u_colors[0])
self._program.setUniformValue(self._location[3], self._u_colors[1])
self._program.setUniformValue(self._location[4], self._height)
self.glDrawElements(GL.GL_TRIANGLES, len(self._indices),
GL.GL_UNSIGNED_INT, self._indices.tobytes())
# texture
if self._texture is None:
return
self.glEnable(GL.GL_BLEND)
self._program.bind()
self._program.setAttributeBuffer(1, GL.GL_FLOAT, 3 * SZ_FLOAT, 2,
5 * SZ_FLOAT)
self._program.enableAttributeArray(1)
self._program.setUniformValue(self._location[0], *self._scale)
self._program.setUniformValue(self._location[1], self._u_channels)
self._texture.bind()
self.glDrawElements(GL.GL_TRIANGLES, len(self._indices),
GL.GL_UNSIGNED_INT, self._indices.tobytes())
self.glDisable(GL.GL_BLEND)
@staticmethod
def __create_shader(type_: QOpenGLShader.ShaderType, source):
shader = QOpenGLShader(type_)
r = shader.compileSourceCode(source)
if not r:
print(shader.log())
return shader
def __update_scale(self, width, height):
# calc texture scale
if self._texture_size[0] < width and self._texture_size[1] < height:
self._scale = (self._texture_size[0] / width,
self._texture_size[1] / height)
else:
tw = width
th = self._texture_size[1] / self._texture_size[0] * tw
if th > height:
th = height
tw = th * self._texture_size[0] / self._texture_size[1]
self._scale = (tw / width, th / height)
def get_gl_info(self):
self.makeCurrent()
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(self.glGetString(GL.GL_VENDOR), self.glGetString(GL.GL_RENDERER),
self.glGetString(GL.GL_VERSION),
self.glGetString(GL.GL_SHADING_LANGUAGE_VERSION))
return info
def set_channels(self, r, g, b, a):
r, g, b, a = float(r), float(g), float(b), float(a)
s = r + g + b
if s > 1.1:
self._u_channels = QMatrix4x4(r, 0, 0, 0, 0, g, 0, 0, 0, 0, b, 0,
0, 0, 0, a)
elif s < 0.1:
self._u_channels = QMatrix4x4(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
a, a, a, 0)
elif a:
self._u_channels = QMatrix4x4(r, 0, 0, 0, 0, g, 0, 0, 0, 0, b, 0,
0, 0, 0, a)
else:
self._u_channels = QMatrix4x4(r, r, r, 0, g, g, g, 0, b, b, b, 0,
0, 0, 0, a)
# redraw
self.update()
def set_texture(self, filename):
# load image
p = Path(filename)
suffix = p.suffix[1:].upper()
try:
if p.is_file() and suffix in self._supported_images:
pim = Image.open(filename)
img = ImageQt(pim)
self.info = f"{pim.format} - {pim.size} - {pim.mode} "
else:
ico = QFileIconProvider().icon(QFileInfo(filename))
pix = ico.pixmap(256, 256)
img = pix.toImage()
self.info = "not an image "
except UnidentifiedImageError as e:
print("UnidentifiedImageError:\n", e, flush=True)
return
self._texture_size = img.width(), img.height()
self.__update_scale(self.width(), self.height())
# create texture
self.makeCurrent()
self._texture = QOpenGLTexture(QOpenGLTexture.Target2D)
self._texture.create()
self._texture.bind()
self._texture.setMinMagFilters(QOpenGLTexture.LinearMipMapLinear,
QOpenGLTexture.Linear)
self._texture.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self._texture.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
self._texture.setData(img)
self._texture.release()
# redraw
self.update()
def set_colors(self, checkerboard, color1, color2):
if checkerboard:
self._u_colors = self._colors_default
else:
self._u_colors = (color1, color2)
self.update()
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 TextureGL(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 = ["texture"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
}
for name in availableShaders
}
imdir = os.path.join(mediaDir, "images")
imFName = "im"
imageFile = os.path.join(imdir, imFName + "0.png")
self.image = QImage(imageFile).mirrored()
self.core = "--coreprofile" in QCoreApplication.arguments()
# opengl data related
self.context = QOpenGLContext()
self.program = QOpenGLShaderProgram()
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.texture = None
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 || texture coords
0.5,
0.5,
0.0,
1.0,
1.0, # top right
0.5,
-0.5,
0.0,
1.0,
0.0, # bottom right
-0.5,
-0.5,
0.0,
0.0,
0.0, # bottom left
-0.5,
0.5,
0.0,
0.0,
1.0 # top left
],
dtype=ctypes.c_float)
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.texture.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, 0, 1, 1)
# shader
shaderName = "texture"
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)
self.program.bindAttributeLocation("aTexCoord", 1)
# 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()
self.program.setUniformValue('myTexture', 0)
# 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)
# texture new school
self.texture = QOpenGLTexture(QOpenGLTexture.Target2D)
self.texture.create()
# new school
self.texture.bind()
self.texture.setData(self.image)
self.texture.setMinMagFilters(QOpenGLTexture.Linear,
QOpenGLTexture.Linear)
self.texture.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self.texture.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
def paintGL(self):
"paint gl"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT)
self.program.bind()
self.program.enableAttributeArray(0)
self.program.enableAttributeArray(1)
floatSize = ctypes.sizeof(ctypes.c_float)
# set attribute values
self.program.setAttributeBuffer(
0, # viewport position
pygl.GL_FLOAT, # coord type
0, # offset
3,
5 * floatSize)
self.program.setAttributeBuffer(
1, # viewport position
pygl.GL_FLOAT, # coord type
3 * floatSize, # offset
2,
5 * floatSize)
# bind texture
self.texture.bind()
funcs.glDrawElements(pygl.GL_TRIANGLES, self.indices.size,
pygl.GL_UNSIGNED_INT, self.indices.tobytes())
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 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()