legacy_pipeline_xmb_ribbon.glsl.vert.h

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#include "shaders_common.h"

static const char *stock_vertex_xmb_ribbon_legacy = GLSL(
 attribute vec3 VertexCoord;
 uniform float time;
 varying vec3 fragVertexEc;

 float iqhash( float n )
 {
 return fract(sin(n)*43758.5453);
 }

 float noise( vec3 x )
 {
 vec3 p = floor(x);
 vec3 f = fract(x);
 f = f*f*(3.0-2.0*f);
 float n = p.x + p.y*57.0 + 113.0*p.z;
 return mix(mix(mix( iqhash(n+0.0 ), iqhash(n+1.0 ),f.x),
 mix( iqhash(n+57.0 ), iqhash(n+58.0 ),f.x),f.y),
 mix(mix( iqhash(n+113.0), iqhash(n+114.0),f.x),
 mix( iqhash(n+170.0), iqhash(n+171.0),f.x),f.y),f.z);
 }

 float xmb_noise2( vec3 x )
 {
 return cos(x.z*4.0)*cos(x.z+time/10.0+x.x);
 }

 void main()
 {
 vec3 v = vec3(VertexCoord.x, 0.0, VertexCoord.y);
 vec3 v2 = v;
 vec3 v3 = v;

 v.y = xmb_noise2(v2)/8.0;

 v3.x = v3.x + time/5.0;
 v3.x = v3.x / 4.0;

 v3.z = v3.z + time/10.0;
 v3.y = v3.y + time/100.0;

 v.z = v.z + noise(v3*7.0)/15.0;
 v.y = v.y + noise(v3*7.0)/15.0 + cos(v.x*2.0-time/2.0)/5.0 - 0.3;

 gl_Position = vec4(v, 1.0);
 fragVertexEc = gl_Position.xyz;
 }
);