代码拉出一个没有类型的对象 pyglet

Question

这是我知道出错的代码

    self.scale_loc = glGetUniformLocation(shader, b"scale")

    self.rotate_loc = glGetUniformLocation(shader, b"rotate")

    self.scale = pyrr.Matrix44.identity()
    
    self.rot_y = pyrr.Matrix44.identity()

def rotate(self):
    self.scale = pyrr.Matrix44.from_scale(pyrr.Vector3([0.2, 0.2, 1.0])).flatten()
    
    self.rot_y = pyrr.Matrix44.from_y_rotation(time.perf_counter() * 2).flatten
    
    #self.rot_y = [y for x in self.rot_y for y in x]
    c_scale = (GLfloat * len(self.scale))(*self.scale)
    c_rotate_y = (GLfloat * len(self.rot_y))(*self.rot_y)

    glUniformMatrix4fv(self.scale_loc, 1, GL_FALSE, c_scale)
    glUniformMatrix4fv(self.rotate_loc, 1, GL_FALSE, c_rotate_y)

错误是

   c_rotate_y = (GLfloat * len(self.rot_y))(*self.rot_y)
   TypeError: object of type 'builtin_function_or_method' has no len()

我不知道它是过时了还是什么。我正在学习一个 4 年前的教程系列。如果您需要更多信息，请告诉我

Answer 1

Pyrr - Matrices are represented by 2 dimensional NumPy arrays. To convert the NumPy array to a ctypes you have to flatten it. The number of elements in the array can be get from the size属性：

self.scale = pyrr.Matrix44.from_scale(pyrr.Vector3([0.2, 0.2, 1.0])).flatten()
self.rot_y = pyrr.Matrix44.from_y_rotation(time.perf_counter() * 2).flatten()

c_scale = (GLfloat * self.scale.size)(*self.scale)
c_rotate_y = (GLfloat * self.rot_y.size)(*self.rot_y)

glUniformMatrix4fv(self.scale_loc, 1, GL_FALSE, c_scale)
glUniformMatrix4fv(self.rotate_loc, 1, GL_FALSE, c_rotate_y)

代码拉出一个没有类型的对象 pyglet

code pulls up an object has no type pyglet

opengl

shader

pyglet

opengl-3

python-3.x