基于MFC单文档的GLSL第一课:灯光与材质

qfj20042004

本课基本步骤如下:
1.用MFC建立单文档
2.架设GL图形绘制环境
3.设定shader渲染器
4.设定灯光与材质
//vertex shader如下:
varying vec4 diffuse,ambient;
varying vec3 normal,lightDir,halfVector;
void main()
{       
        normal = normalize(gl_NormalMatrix * gl_Normal);
        lightDir = normalize(vec3(gl_LightSource[0].position));
        halfVector = normalize(gl_LightSource[0].halfVector.xyz);
        diffuse = gl_FrontMaterial.diffuse * gl_LightSource[0].diffuse;
        ambient = gl_FrontMaterial.ambient * gl_LightSource[0].ambient;
        ambient += gl_LightModel.ambient * gl_FrontMaterial.ambient;
        gl_Position = ftransform();

}
//fragment shader如下:
varying vec4 diffuse,ambient;
varying vec3 normal,lightDir,halfVector;
void main()
{
        vec3 n,halfV,viewV,ldir;
        float NdotL,NdotHV;
        vec4 color = ambient;
        n = normalize(normal);
        NdotL = max(dot(n,lightDir),0.0);
        if (NdotL > 0.0) {
                halfV = normalize(halfVector);
                NdotHV = max(dot(n,halfV),0.0);
                color += gl_FrontMaterial.specular * gl_LightSource[0].specular * pow(NdotHV,gl_FrontMaterial.shininess);
                color += diffuse * NdotL;
        }
        gl_FragColor = color;
}

说明显卡要求支持shader如:AGP 9550
效果图如下:

Jeminai

象这种固定管线就拥有的功能，用Shade重写一遍总觉得不值、、、。

inkcomic

有教育意义吧。。。支持