#version 150

/* Cel shading fragment program for single-pass rendering */
uniform vec4 diffuse;
uniform vec4 specular;
uniform sampler2D diffuseMap;
uniform sampler2D diffuseRamp;
uniform sampler2D specularRamp;
uniform sampler2D edgeRamp;

in vec2 uvIn;
in float diffuseIn;
in float specularIn;
in float edge;

out vec4 fragColour;

/*uniform lighting
{
	vec4 diffuse;
	vec4 specular;
} LightingParams;*/

void main()
{
	// Step functions from textures  
	vec4 diffuseTex = texture(diffuseMap, uvIn);
	float diffuseStep = texture(diffuseRamp, vec2(diffuseIn, 0.0)).x;
	float specularStep = texture(specularRamp, vec2(specularIn, 0.0)).x;
	float edgeStep = texture(edgeRamp, vec2(edge, 0.0)).x;

	fragColour = diffuseTex * edgeStep * ((diffuse * diffuseStep) + (specular * specularStep));
}