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nuclear@61
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1 uniform sampler2D mrt0, mrt1, mrt2;
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nuclear@30
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2 uniform vec2 tex_scale, fb_size;
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nuclear@30
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3
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nuclear@33
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4 uniform vec3 light_color;
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nuclear@33
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5 uniform float light_radius;
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nuclear@33
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6
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nuclear@34
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7 varying vec3 vpos, ltpos;
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nuclear@29
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8
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nuclear@29
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9 void main()
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nuclear@29
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10 {
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nuclear@30
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11 vec2 tc = gl_FragCoord.xy * tex_scale / fb_size;
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nuclear@29
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12
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nuclear@34
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13 // MRT0 - rgb: position, a: shininess
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nuclear@34
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14 vec4 texel0 = texture2D(mrt0, tc);
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nuclear@34
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15 vec3 pos = texel0.xyz;
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nuclear@34
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16 float shin = texel0.w;
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nuclear@34
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17
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nuclear@34
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18 // MRT1 - rgb: normal
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nuclear@30
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19 vec3 norm = texture2D(mrt1, tc).xyz;
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20
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nuclear@34
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21 // MRT2 - rgb: diffuse color, a: specular intensity
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nuclear@30
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22 vec4 texel3 = texture2D(mrt2, tc);
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nuclear@30
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23 vec3 dcol = texel3.xyz;
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nuclear@34
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24 vec3 scol = texel3.www;
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nuclear@30
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25
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nuclear@30
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26 vec3 ldir = ltpos - pos;
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nuclear@33
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27 float light_dist = length(ldir);
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nuclear@30
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28 ldir = normalize(ldir);
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nuclear@30
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29
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nuclear@34
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30 // diffuse
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nuclear@34
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31 float ndotl = max(dot(norm, ldir), 0.0);
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nuclear@34
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32 vec3 color_diffuse = dcol * ndotl;
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33
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nuclear@34
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34 // specular
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nuclear@34
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35 vec3 vdir = -normalize(vpos);
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nuclear@34
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36 vec3 halfvec = normalize(vdir + ldir);
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nuclear@34
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37 float ndoth = max(dot(norm, halfvec), 0.0);
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nuclear@34
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38 vec3 color_specular = scol * pow(ndoth, shin);
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nuclear@30
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39
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nuclear@33
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40 float atten = 1.0 - light_dist / light_radius;
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nuclear@33
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41 atten = clamp(atten, 0.0, 1.0);
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nuclear@29
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42
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nuclear@34
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43 vec3 color = (color_diffuse + color_specular) * light_color * atten;
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nuclear@34
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44 gl_FragColor = vec4(color, 1.0);
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nuclear@29
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45 }
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