本文介绍了OpenGL固定管线渲染过程中，模型视图变换如何影响光照位置，并提供了解决方案：通过在glPushMatrix和glPopMatrix配对使用中调用glLightf(v)函数来修正光照位置。
NOTE: This note is just for FIXED PIPELINE of OpenGL Rendering Procedure.
CAUTION: ModelView transformation influences light position if light is implemented with
CVector4D someWhere;
GLfloat lightPos[4] = {someWhere.x, someWhere.y, someWhere.z, someWhere.w};
glLightf(v)(GL_LIGHTi, GL_POSITION, lightPos);
so call glLightf(v)() between a pair of glPushMatrix(); and glPopMatrix(); would solve this problem.
CAUTION: ModelView transformation influences light position if light is implemented with
CVector4D someWhere;
GLfloat lightPos[4] = {someWhere.x, someWhere.y, someWhere.z, someWhere.w};
glLightf(v)(GL_LIGHTi, GL_POSITION, lightPos);
so call glLightf(v)() between a pair of glPushMatrix(); and glPopMatrix(); would solve this problem.
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