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annotate shader.frag @ 47:9909014498f0

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Add helper functions dmError() and dmMsg() and use them.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 05 Dec 2019 23:52:45 +0200
parents d2839cbfaad8
children 71f6c5cc8eec
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1 varying vec3 snormal;
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2 varying vec3 svertex;
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3 uniform int nlights;
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6 float maxdot(vec3 sveca, vec3 svecb)
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7 {
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8 return max(dot(sveca, svecb), 0.0);
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9 }
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12 vec4 mclamp(vec4 svec)
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13 {
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14 return clamp(svec, 0.0, 1.0);
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15 }
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18 void main(void)
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19 {
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20 vec3 snormal = normalize(snormal);
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21 vec3 srcVec = normalize(-svertex);
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22 //vec4 poo = vec4(0.0, 0.0, 0.0, 0.0);
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23 vec4 poo = gl_FragCoord;
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24 //poo += vec4(snormal.x, snormal.y, snormal.z, 0.0);
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25 vec4 finalColor = vec4(poo.x * 0.1, poo.y * 0.001, poo.z, 1.0);
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27 for (int i = 0; i < nlights; i++)
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28 {
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29 vec3 lightVec = normalize(gl_LightSource[i].position.xyz - svertex);
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30 vec3 refVec = normalize(-reflect(lightVec, snormal));
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32 vec4 ambient = gl_FrontLightProduct[i].ambient;
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33 vec4 diffuse = mclamp(gl_FrontLightProduct[i].diffuse * maxdot(snormal, lightVec));
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34 vec4 specular = mclamp(
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35 gl_FrontLightProduct[i].specular *
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36 pow(maxdot(refVec, srcVec), gl_FrontMaterial.shininess));
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38 finalColor += ambient + diffuse + specular;
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39 }
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40
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41 gl_FragColor = gl_FrontLightModelProduct.sceneColor + finalColor;
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42 }