fragmentShader

#version 330 core

// Output a color for each fragment
out vec3 color;

in vec3 normal;
in vec3 toLight;
in vec4 gl_FragCoord;
in vec3 positionWorld;
in vec2 UV;

uniform vec3 LightPosition;
uniform sampler2D TextureSampler;

void main(){
  // Bright white light
  vec3 LightColor = vec3(1,1,1);
  float LightPower = 50.0f;

  // Green surface
  vec3 MaterialDiffuseColor = texture(TextureSampler, UV).rgb;
  vec3 MaterialAmbientColor = vec3(0.1,0.1,0.1) * MaterialDiffuseColor;
  vec3 MaterialSpecularColor = vec3(0.3,0.3,0.3);

  float distance = length(LightPosition - positionWorld);

  float cosTheta = clamp(dot(normalize(normal),normalize(toLight)),0,1);

  // Light color is scaled by the amout it hits directly
  color = MaterialAmbientColor + MaterialDiffuseColor * LightColor * LightPower * cosTheta / (distance*distance);

  // Makes the red line
  /*
  if(gl_FragCoord.x < 965 && 955 < gl_FragCoord.x){
    color = vec3(1,0,0);
  }
  else{
    color = fragmentColor;
  }
  */
}