diffuse.vs

OpeNGL超级宝典源代码. OpeNGL超级宝典源代码.

// diffuse.vs
//
// Generic vertex transformation,
// diffuse lighting based on one
// white light

uniform vec3 lightPos0;

void main(void)
{
    // normal MVP transform
    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;

    vec3 N = normalize(gl_NormalMatrix * gl_Normal);
    vec4 V = gl_ModelViewMatrix * gl_Vertex;
    vec3 L = normalize(lightPos0 - V.xyz);

    // output the diffuse color
    float NdotL = dot(N, L);
    gl_FrontColor = gl_Color * vec4(max(0.0, NdotL));
}