开启自动纹理坐标功能
glEnable(GL_TEXTURE_GEN_S)
glEnable(GL_TEXTURE_GEN_T)
自动生成纹理坐标
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP)
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP)
gl1.1的三个GEN_MODE
GL_SPHERE_MAP
GL_OBJECT_LINER
GL_EYE_LINER
* gl后续版本还有更多MODE
申请一个二次对象
GLUquadricObj *quadratic
quadratic=gluNewQuadric();
设置二次对象的法线
gluQuadricNormals(quadratic, GLU_SMOOTH);
设置二次对象纹理功能开启
gluQuadricTexture(quadratic, GL_TRUE);
生成具体的二次对象cylinder/sphere
gluCylinder(quadratic, 1.0f,1.0f,3.0f,32,32)
gluSphere(quadratic,1.3f,32,32);
