我有一个搅拌机模型,下面是我将模型加载到 python 时如何渲染的图像。看起来法线都搞砸了。我为每个顶点使用正确的法线。我以正确的顺序导出它们。我在搅拌机控制台中对此进行了测试,实际导出文件具有正确的数据。
我知道我必须在 python 中旋转模型,因为 z 轴不同,所以我不确定法线 z 是否指向错误的方向。
我正在使用pyglet。以前有人遇到过这个问题吗?关于我可以做些什么来尝试解决它的任何想法?
我不确定这是 OpenGL 还是 python 问题。
opengl设置代码:
glMatrixMode(GL_PROJECTION)
zNear = 0.01
zFar = 1000.0
fieldOfView = 45.0
size = zNear * math.tan(math.radians(fieldOfView) / 2.0)
glFrustum(-size, size, -size / (w / h), size /
(w / h), zNear, zFar);
glViewport(0, 0, w, h);
# Set-up projection matrix
# TODO
glMatrixMode(GL_MODELVIEW)
glShadeModel(GL_SMOOTH)
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
light0Ambient = (GLfloat * 4)(*[])
light0Ambient[0] = 0.2
light0Ambient[1] = 0.2
light0Ambient[2] = 0.2
light0Ambient[3] = 1.0
glLightfv(GL_LIGHT0, GL_AMBIENT, light0Ambient);
lightpos = (GLfloat * 3)(*[])
lightpos[0] = 5.0
lightpos[1] = 5.0
lightpos[2] = 5.0
glLightfv(GL_LIGHT0, GL_POSITION, lightpos)
tempLV = self.kjgCreateVectorWithStartandEndPoints((5.0,5.0,5.0), (0.0,0.0,-3.0))
lightVector = (GLfloat * 3)(*[])
lightVector[0] = tempLV[0]
lightVector[1] = tempLV[1]
lightVector[2] = tempLV[2]
glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION,lightVector);
glLoadIdentity( )
glTranslatef(0.0, 2.0, -18.0)
#glScalef(0.4, 0.4, 0.4)
glRotatef(-90, 1.0, 0.0, 0.0)
绘制代码:
for face in self.faces:
#print group
if len(face) == 3:
glBegin(GL_TRIANGLES)
elif len(face) == 4:
glBegin(GL_QUADS)
else:
glBegin(GL_POLYGON)
for i in face:
if i in (104,16,18,102):
glVertex3f(*self.vertices[i])
color = self.calculateVertexIntensity((.5,.5,.5),self.normals[i],self.vertices[i])
glColor3f(*color)
glNormal3f(*self.normals[i])
glEnd()