fStart.glsl

uniform float texScale;
varying vec4 color;
varying vec2 texCoord;  // The third coordinate is always 0.0 and is discarded
varying vec4 position;


uniform sampler2D texture;

uniform mat4 ModelView;
uniform vec4 light1Pos;
uniform vec3 AmbientProduct, DiffuseProduct, SpecularProduct;
uniform float Shininess;
uniform vec4 light2Pos;
uniform vec3 light1Brightness;
uniform vec3 light2Brightness;
uniform float spread;
uniform vec4 lightVec;


void main()
{
    vec3 eyePos = (ModelView * position).xyz;

    vec3 Lvec = light1Pos.xyz - pos;

    vec3 L = normalize (Lvec);
    vec3 L2 = normalize(light2Pos.xyz);
    vec3 E = normalize (-eyePos);
    vec3 H = normalize( L + E );
    vec3 H2 = normalize( L2 + E);


    vec3 N = normalize((ModelView*vec4(normal, 0.0)).xyz);

    vec3 ambient = light1Brightness * AmbientProduct;
    vec3 ambient2 = light2Brightness * AmbientProduct;
    float Kd = max(dot(L,N), 0.0);
    vec3 diffuse = light1Brightness * Kd*DiffuseProduct;
    float Kd2 = max(dot(L2, N), 0.0);
    vec3 diffuse2 = light2Brightness * Kd2*DiffuseProduct;


    float Ks = pow(max(dot(N,H), 0.0), Shininess);
    vec3 specular = light1Brightness * Ks * SpecularProduct;
    float Ks2 = pow(max(dot(N,H2), 0.0), Shininess);
    vec3 specular2 = light2Brightness * Ks2 * SpecularProduct;

    if(dot(L,N) < 0.0) {
    specular = vec3(0.0, 0.0, 0.0);
    }
    if(dot(L2,N) < 0.0) {
    specular2 = vec3(0.0, 0.0, 0.0);
    }



    vec3 globalAmbient = vec3(0.1, 0.1, 0.1);
    float dropoff = sqrt(dot(Lvec, Lvec))/15 + 1;
    color = vec4(globalAmbient + ((ambient1 + diffuse1) / len) + ambient2 + diffuse2, 1.0);

    //gl_FragColor = color * texture2D( texture,  texCoord * texScale );
    gl_FragColor = color * texture2D( texture,  texCoord) + vec4((specular1 / len) + specular2, 1.0) ;

}