def RenderToDrawBuffer_SceneBoxWire(self, vpMat: QMatrix4x4,
boxSize: QVector3D):
with uglw.VAOBound(self._vao_blank):
with uglw.ProgBound(self._sceneBoxWireProgramInfo.__progHandle__):
glUniform3fv(self._sceneBoxWireProgramInfo.boxSize, 1,
utyp.GetTuple(boxSize))
glUniformMatrix4fv(self._sceneBoxWireProgramInfo.vpMat, 1,
GL_FALSE, vpMat.data())
glDrawArrays(GL_LINES, 0, 24)
def RenderToDrawBuffer_VelocityLine(self, vpMat: QMatrix4x4,
tex3DName_velocity: GLuint,
cellScale: float, lineScale: float):
with uglw.VAOBound(self._vao_blank):
with uglw.TextureBound(GL_TEXTURE_3D, tex3DName_velocity):
with uglw.ProgBound(
self._velocityLineProgramInfo.__progHandle__):
cellNx2 = self._fieldSize[0] * self._fieldSize[
1] * self._fieldSize[2] * 2
glUniform1fv(self._velocityLineProgramInfo.lineScale, 1,
lineScale)
glUniform1fv(self._velocityLineProgramInfo.cellScale, 1,
cellScale)
glUniformMatrix4fv(self._velocityLineProgramInfo.vpMat, 1,
GL_FALSE, vpMat.data())
glDrawArrays(GL_LINES, 0, cellNx2)
glDrawArrays(GL_POINTS, 0, cellNx2)
def GetSceneBoxCursorIntersection(self, vpMat: QMatrix4x4,
boxSize: QVector3D,
winspaceCursorPos: QPoint,
winspaceDimension: QPoint) -> QVector3D:
"""
:param winspaceCursorPos: lower-left corner as origin
:return: 3D world position of cursor interaction
"""
# render depthImage and get depthValue -------------------------------------------------------------------------
self._depthInteractionBuffer.RequestBindFBO(winspaceDimension)
glViewport(0, 0, winspaceDimension.x(), winspaceDimension.y())
with uglw.VAOBound(self._vao_blank):
with uglw.ProgBound(self._sceneBoxSurfProgramInfo.__progHandle__):
with uglw.EnableScope(GL_DEPTH_TEST):
glClearBufferfv(GL_DEPTH, 0, (1., ))
glUniform3fv(self._sceneBoxSurfProgramInfo.boxSize, 1,
utyp.GetTuple(boxSize))
glUniformMatrix4fv(self._sceneBoxSurfProgramInfo.vpMat, 1,
GL_FALSE, vpMat.data())
glDrawArrays(GL_TRIANGLES, 0, 3 * 2 * 6)
winspaceCursorDepthValue = glReadPixels(winspaceCursorPos.x(),
winspaceCursorPos.y(), 1, 1,
GL_DEPTH_COMPONENT,
GL_FLOAT)[0][0]
# print( winspaceCursorDepthValue )
glBindFramebuffer(GL_FRAMEBUFFER, 0)
# unproject cursor into worldCoord -----------------------------------------------------------------------------
if winspaceCursorDepthValue == 1.0:
raise ValueError # cursor ray hit background, no object to manipulate
return self.GetUnprojection(winspaceCursorPos,
winspaceCursorDepthValue,
winspaceDimension, vpMat)