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 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()
