《基于MFC的OpenGL编程》Part 14 Quadrics

《基于MFC的OpenGL编程》Part 14 Quadrics2010-05-02 博客园 Phinecos（洞庭散人）本文在第11篇文章的基础上，为其加入显示各种二次曲面的代码；

Quadrics

Every quadric has a few settings associated with it. We have to create a quadric first and then customize its settings to render the shape we want. The gluNewQuadric function creates a state variable that describes the current drawing style, orientation, lighting mode, texturing mode and the callback functions. Once we use this function to create a new quadric, we can customize the drawing of shapes by changing its state using functions such as

gluQuadricDrawStyle - which selects the type of OpenGL drawing primitives that are used to drw the shape.

gluQuadricOrientation - which controls the direction of the lighting normals.

gluQuadricNormals - which controls the generation of lighting normals.

gluQuadricTexture - which generates texture coordinates automatically for the quadric.

1,在CCY457OpenGLView类中加入下列变量，用来表示二次曲面类型：

//Quadric
GLuint m_Quadric;