realisticallyOptimized

1#version 120
2 
3varying vec2 vTex;
4varying vec2 vLm;
5varying vec3 vNormal;
6varying vec3 vWorldPos;
7varying vec4 vColor;
8 
9uniform mat4 gbufferModelViewInverse;
10uniform float frameTimeCounter;
11 
12attribute vec4 mc_Entity;
13 
14float leafMask(float id) {
15    return 1.0 - step(0.5, abs(id - 1004.0));
16}
17 
18void main() {
19    vec3 pos = gl_Vertex.xyz;
20    float vid = floor(mc_Entity.x + 0.5);
21    float mask = leafMask(vid);
22 
23    float gust = sin(frameTimeCounter * 2.0 + pos.x * 0.12 + pos.z * 0.14);
24    float sway = sin(frameTimeCounter * 1.1 + pos.x * 0.08 - pos.z * 0.10);
25    float topPart = smoothstep(0.1, 0.9, gl_MultiTexCoord0.y);
26 
27    pos.x += (gust * 0.04 + sway * 0.02) * mask * topPart;
28    pos.z += (gust * 0.02) * mask * topPart;
29 
30    vec4 viewPos = gl_ModelViewMatrix * vec4(pos, 1.0);
31    gl_Position = gl_ProjectionMatrix * viewPos;
32 
33    vTex = gl_MultiTexCoord0.xy;
34    vLm = (gl_TextureMatrix[1] * gl_MultiTexCoord1).xy;
35    vNormal = normalize(gl_NormalMatrix * gl_Normal);
36    vWorldPos = (gbufferModelViewInverse * viewPos).xyz;
37    vColor = gl_Color;
38}
39