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const int a_MaxLights=4;
struct st_LightSourceParameters {
vec4 ambient;
vec4 diffuse;
vec4 specular;
vec4 position;
vec4 halfVector;
vec3 spotDirection;
float spotExponent;
float spotCutoff;
float spotCosCutoff;
float constantAttenuation;
float linearAttenuation;
float quadraticAttenuation;
};
uniform st_LightSourceParameters u_LightSource[a_MaxLights];
struct FogParameters {
vec4 color;
float density;
float start;
float end;
float scale;
};
uniform FogParameters st_Fog;
uniform mat4 u_ModelViewMatrix;
uniform mat3 u_NormalMatrix;
attribute vec4 a_Vertex;
attribute vec3 a_Normal;
attribute vec4 a_Color;
varying vec3 N, L0, H0, L1, H1;
varying vec4 D0, A0, D1, A1;
varying float fog;
varying float v_FogFragCoord;
void main()
{
N = normalize(u_NormalMatrix * a_Normal);
vec3 eye_pos = vec3(u_ModelViewMatrix * a_Vertex);
vec3 aux = vec3(u_LightSource[0].position - vec4(eye_pos, 1.0));
L0 = normalize(aux);
H0 = normalize(u_LightSource[0].halfVector.xyz);
aux = vec3(u_LightSource[1].position - vec4(eye_pos, 1.0));
L1 = normalize(aux);
H1 = normalize(u_LightSource[1].halfVector.xyz);
A0 = u_LightSource[0].ambient * a_Color;
D0 = u_LightSource[0].diffuse * a_Color;
A1 = u_LightSource[1].ambient * a_Color;
D1 = u_LightSource[1].diffuse * a_Color;
v_FogFragCoord = -eye_pos.z;
fog = (st_Fog.end - v_FogFragCoord) * st_Fog.scale;
gl_Position = u_ModelViewMatrix * a_Vertex; // this was converted from ftransform(), is that right?
}
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