mirror of https://github.com/CGAL/cgal
86 lines
2.1 KiB
GLSL
86 lines
2.1 KiB
GLSL
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varying highp vec4 color;
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varying highp vec4 fP;
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varying highp vec3 fN;
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varying highp float dist[6];
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uniform highp vec4 front_color;
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uniform highp vec4 back_color;
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uniform highp vec4 light_pos;
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uniform highp vec4 light_diff;
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uniform highp vec4 light_spec;
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uniform highp vec4 light_amb;
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uniform highp float spec_power;
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uniform int is_two_side;
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uniform bool is_selected;
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uniform bool is_clipbox_on;
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uniform highp float near;
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uniform highp float far;
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uniform highp float width;
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uniform highp float height;
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uniform bool comparing;
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uniform bool writing;
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uniform bool back_front_shading;
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uniform sampler2D sampler;
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uniform highp float alpha;
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highp float depth(float z)
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{
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return (2 * near) / (far + near - z * (far - near));
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}
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void main(void) {
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if(is_clipbox_on)
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if(dist[0]>0.0 ||
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dist[1]>0.0 ||
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dist[2]>0.0 ||
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dist[3]>0.0 ||
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dist[4]>0.0 ||
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dist[5]>0.0)
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discard;
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float d = depth(gl_FragCoord.z);
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float test = texture2D(sampler, vec2(gl_FragCoord.x/width, gl_FragCoord.y/height)).r;
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if(comparing && d <= test)
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discard;
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if(writing)
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gl_FragColor = vec4(d,d,d,1.0);
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else
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{
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highp vec3 L = light_pos.xyz - fP.xyz;
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highp vec3 V = -fP.xyz;
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highp vec3 N;
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highp vec4 my_color = highp vec4(color.xyz, 1.0);
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if(fN == vec3(0.0,0.0,0.0))
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{
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out_color = my_color;
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return;
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}
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N = normalize(fN);
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L = normalize(L);
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V = normalize(V);
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highp vec3 R = reflect(-L, N);
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highp vec4 diffuse;
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float dot_prod = dot(N,L);
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if(back_front_shading)
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{
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if (dot_prod > 0)
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my_color = front_color;
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else
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my_color = back_color;
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}
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if(is_two_side == 1)
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diffuse = abs(dot(N,L)) * light_diff * color;
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else
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diffuse = max(dot(N,L), 0.0) * light_diff * my_color;
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highp vec4 specular = pow(max(dot(R,V), 0.0), spec_power) * light_spec;
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vec4 ret_color = vec4((my_color*light_amb).xyz + diffuse.xyz + specular.xyz,1);
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if(is_selected)
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gl_FragColor = vec4(ret_color.r+35.0/255.0, ret_color.g+35.0/255.0, ret_color.b+35.0/255.0, alpha);
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else
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gl_FragColor = vec4(ret_color.xyz, alpha);
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}
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}
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