PyOpenGL FPS改进

Question

我正在尝试提高python OpenGL程序的FPS速率。到目前为止，我的方法是：

    self.bufferVertices = glGenBuffers(1)
    glBindBuffer(GL_ARRAY_BUFFER_ARB, self.bufferVertices)
    glBufferData(GL_ARRAY_BUFFER_ARB, ADT.arrayByteCount(vertices), ADT.voidDataPointer(vertices), GL_STATIC_DRAW_ARB)

    self.bufferNormals = glGenBuffers(1)
    glBindBuffer(GL_ARRAY_BUFFER_ARB, self.bufferNormals)
    glBufferData(GL_ARRAY_BUFFER_ARB, ADT.arrayByteCount(normals), ADT.voidDataPointer(normals), GL_STATIC_DRAW_ARB)

    self.size = len(triangles)
    self.bufferTriangles = glGenBuffers(1)
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, self.bufferTriangles)
    glBufferData(GL_ELEMENT_ARRAY_BUFFER_ARB, len(triangles), ADT.voidDataPointer(triangles), GL_STATIC_DRAW_ARB)
-----------------------------------------------------------------
    glEnableClientState(GL_VERTEX_ARRAY) 
    glBindBuffer(GL_ARRAY_BUFFER_ARB, self.bufferVertices)
    glVertexPointer(3, GL_FLOAT, 0, None)
    glBindBuffer(GL_ARRAY_BUFFER_ARB, self.bufferNormals)
    glNormalPointer(GL_FLOAT, 0, None)
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, self.bufferTriangles)
    glIndexPointer(GL_INT, 0, None)

    glDrawElements(displayType, self.size, GL_UNSIGNED_INT, 0)

    glDisableClientState(GL_VERTEX_ARRAY) 

现在，在GL_POINTS和GL_TRIANGLES之间更改displayType。我目前的点数大约为28FPS，三角形只有大约5-6FPS。我这个差异正常吗？我该怎么做才能改善FPS？

Answer 1

由于您正在使用顶点缓冲区对象，因此您不受CPU限制。所以要么你有很多几何，要么你实际上没有硬件加速。无论哪种方式，由于更高的填充率要求，预计从点到填充三角形的性能切换减少。