vec3 lightPos = {x: 0, y: 2, z: 0};
vec3 lightCol = {r: 1.0, g: 0.8, b: 0.9};


vec4 vertexShader(	in attr!(vec3, `positions`) inPos,
								in attr!(vec3, `normals`) inNorm,
								in attr!(vec3, `texCoords`) inTC,
								out vec3 toLight,
								out vec3 norm,
								out vec3 toEye,
								out vec2 outTC)
{ static if (compute) {
	inNorm = modelMat.rotate(inNorm);
	norm = inNorm;
	
	toLight = lightPos - modelMat.xform(inPos);
	toLight.normalize();
	
	toEye = viewerPosition - modelMat.xform(inPos);
	toEye.normalize();
	
	outTC = vec2(inTC.x, inTC.y);
					
	return comboMat.xform(vec4(inPos.x, inPos.y, inPos.z, 1));
} else return vec4.zero; }


void pixelShader(	in vec3 toLight,
							in vec3 inNorm,
							in vec3 toEye,
							in vec2 texCoord,
							out Color output)
{ static if (compute) {

	inNorm.normalize();
	toLight.normalize();
	toEye.normalize();
	
	float normDotLight = inNorm.dot(toLight);
	vec3 refl = 2f * (normDotLight) * inNorm - toLight;
	
	float specular = refl.dot(toEye);
	if (specular < 0) specular = 0;
	
	// poor man's power function
	specular *= specular;
	specular *= specular;
	specular *= 2.5f;
	
	float fresnel = 1f + toEye.dot(inNorm);
	fresnel *= fresnel;
	fresnel = 0.9f / (fresnel * fresnel);
	if (fresnel > 0.9) fresnel = 0.9;
	
	float diffuse = normDotLight;
	if (diffuse < 0f) diffuse = 0f;
	
	vec3ub tex = tex2Dlinear(0, texCoord);
	vec3 diffCol = vec3(	lightCol.r * tex.r * (1.f/255.f),
									lightCol.g * tex.g * (1.f/255.f),
									lightCol.b * tex.b * (1.f/255.f));
	
	output = vec3ToColor(diffCol * (diffuse + specular + fresnel));
}}