final.fsh

//Shaders 2.0 port of Yourself's Cell Shader

#version 120

#define CELL_SHADING
#define THRESHOLD 0.4
#define THICKNESS 0.0025

uniform sampler2D texture;
uniform sampler2D gdepth;
uniform float near;
uniform float far;
varying vec4 texcoord;

#ifdef CELL_SHADING
float getDepth(vec2 coord) {
        float depth = texture2D(gdepth, coord).x;
        return 2.0 * near * far / ( far + near - ( 2.0 * depth - 1.0 ) * ( far - near ) );
}
float getCellShaderFactor(vec2 coord) {
    float d=getDepth(coord);
    vec3 n=normalize(vec3(getDepth(coord+vec2(THICKNESS,0.0))-d,getDepth(coord+vec2(0.0,THICKNESS))-d ,THRESHOLD));
    return n.z;//clamp(n.z*3.0,0.0,1.0);
}
#endif
void main()
{
    vec4 color = texture2D(texture, texcoord.st);
    #ifdef CELL_SHADING
    color.rgb *= (getCellShaderFactor(texcoord.st));
    #endif
    gl_FragColor = color;
}