out vec4 FragColor;

uniform sampler2D uTexMain;
uniform vec4 uColour;

in vec4 aColour;
in vec2 aUv;
in vec3 aNorm;
in vec3 aCo;

void main()
{
   vec3 diffuse = texture( uTexMain, aUv ).rgb;
   float light1 = max(0.0,dot(-vec3(0.5,-0.8,0.25), aNorm));
   float light2 = max(0.0,dot(-vec3(-0.8,0.5,-0.25), aNorm));
   diffuse += vec3(0.2,0.2,0.2) +
             vec3(1.0,1.0,0.9)*light1 + 
             vec3(0.1,0.3,0.4)*light2;
   FragColor = vec4(diffuse*uColour.rgb, aColour.a*uColour.a);
}