Created
September 24, 2021 17:07
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Swinging geometry shader for structure
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| attribute vec4 vertex; | |
| attribute vec4 normal; | |
| attribute vec2 textureCoord; | |
| varying vec4 ncoord; | |
| varying vec4 vcoord; | |
| varying vec2 tcoord; // | |
| uniform sampler2D tex; // texture one | |
| uniform sampler2D tex2; // texture two | |
| uniform vec2 tres; // size of texture (screen) | |
| uniform vec4 fparams; // 4 floats coming in | |
| uniform float ftime; // 0.0 to 1.0 | |
| uniform int itime; // increases when ftime hits 1.0 | |
| uniform mat4 MVP; | |
| //f1:swing amount: | |
| #define PI 3.1415926535897932384626 | |
| float time = float(itime) + ftime; | |
| // https://github.com/dmnsgn/glsl-rotate/blob/master/rotation-3d-y.glsl | |
| mat4 rotation3dY(float angle) { | |
| float s = sin(angle); | |
| float c = cos(angle); | |
| return mat4( | |
| c, 0.0, -s, 0.0, | |
| 0.0, 1.0, 0.0, 0.0, | |
| s, 0.0, c, 0.0, | |
| 0.0, 0.0, 0.0, 1.0 | |
| ); | |
| } | |
| void main(void) | |
| { | |
| vec4 c = texture2D(tex2,textureCoord); | |
| tcoord = textureCoord; | |
| // my demo code | |
| // vec4 vertex = a_position; | |
| vec4 v = vertex; | |
| v = v * rotation3dY(sin(time + v.y) * fparams[1]); | |
| vec4 Vert = MVP * v; | |
| ncoord = normal; | |
| gl_Position = Vert; | |
| } |
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