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nuclear@12
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1 /*
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nuclear@12
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2 Printblobs - typography display hack
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nuclear@12
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3 Copyright (C) 2013 John Tsiombikas <nuclear@member.fsf.org>
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nuclear@12
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4
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nuclear@12
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5 This program is free software: you can redistribute it and/or modify
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nuclear@12
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6 it under the terms of the GNU General Public License as published by
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nuclear@12
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7 the Free Software Foundation, either version 3 of the License, or
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nuclear@12
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8 (at your option) any later version.
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nuclear@12
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9
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nuclear@12
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nuclear@12
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13 GNU General Public License for more details.
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nuclear@12
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14
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nuclear@12
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15 You should have received a copy of the GNU General Public License
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nuclear@12
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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nuclear@12
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17 */
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nuclear@7
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18 varying vec3 normal, vpos;
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nuclear@7
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19
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nuclear@7
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20 void main()
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nuclear@7
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21 {
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nuclear@7
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22 vec3 n = normalize(normal);
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nuclear@7
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23 vec3 v = -normalize(vpos);
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nuclear@7
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24
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nuclear@8
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25 vec3 color = vec3(0.0, 0.0, 0.0);
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nuclear@7
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26
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nuclear@8
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27 for(int i=0; i<2; i++) {
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nuclear@8
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28 vec3 l = normalize(gl_LightSource[i].position.xyz);
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nuclear@8
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29 vec3 h = normalize(v + l);
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nuclear@8
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30
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nuclear@8
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31 float ndotl = max(dot(n, l), 0.0);
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nuclear@8
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32 float ndoth = max(dot(n, h), 0.0);
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nuclear@8
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33 float spec = pow(ndoth, gl_FrontMaterial.shininess);
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nuclear@8
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34
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nuclear@8
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35 vec3 dcol = gl_FrontMaterial.diffuse.xyz * gl_LightSource[i].diffuse.xyz;
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nuclear@8
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36 vec3 scol = gl_FrontMaterial.specular.xyz * gl_LightSource[i].diffuse.xyz;
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nuclear@8
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37
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nuclear@8
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38 color += dcol * ndotl + scol * spec;
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nuclear@8
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39 }
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nuclear@7
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40
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nuclear@7
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41 vec3 acol = gl_FrontMaterial.ambient.xyz * gl_LightModel.ambient.xyz;
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nuclear@7
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42
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nuclear@8
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43 gl_FragColor.xyz = acol + color;
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nuclear@7
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44 gl_FragColor.w = 1.0;
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nuclear@7
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45 }
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