OpenGL port of https://github.com/jeschke/water-wave-packets, presented at SIGGRAPH 2017.
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42 lines
1.3 KiB
42 lines
1.3 KiB
#version 410
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#define SCENE_EXTENT 100.0f
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layout(points) in;
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layout(line_strip, max_vertices = 5) out;
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uniform mat4 matrModel;
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uniform mat4 matrVisu;
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uniform mat4 matrProj;
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/////////////////////////////////////////////////////////////////
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in Attribs {
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vec4 Pos;
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vec4 Att1;
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vec4 Att2;
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} In[];
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void main(void)
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{
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if (In[0].Pos.x < -9000)
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return;
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float dThickness = In[0].Att1.w;
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float wThickness = In[0].Att1.w;
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vec3 center = vec3(In[0].Pos.x, 0, In[0].Pos.y);
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vec3 wavedir = vec3(In[0].Pos.z, 0, In[0].Pos.w);
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vec3 wavecrest = vec3(wavedir.z, 0, -wavedir.x); // wave crest, orthogonal to wave direction
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vec4 p1 = vec4(center - wThickness * wavecrest, 1);
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vec4 p2 = vec4(center - wThickness * wavecrest - dThickness * wavedir, 1);
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vec4 p3 = vec4(center + wThickness * wavecrest, 1);
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vec4 p4 = vec4(center + wThickness * wavecrest - dThickness * wavedir, 1);
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gl_Position = matrProj * matrVisu * matrModel * p1;
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EmitVertex();
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gl_Position = matrProj * matrVisu * matrModel * p2;
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EmitVertex();
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gl_Position = matrProj * matrVisu * matrModel * p4;
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EmitVertex();
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gl_Position = matrProj * matrVisu * matrModel * p3;
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EmitVertex();
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gl_Position = matrProj * matrVisu * matrModel * p1;
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EmitVertex();
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}
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