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Simpler sun shader

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Anuken
2020-04-09 21:15:42 -04:00
parent dedb63e9b6
commit b4739e6036
1 changed files with 2 additions and 27 deletions
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29
core/assets/shaders/sun.vert
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@@ -91,32 +91,7 @@ float snoise(vec4 v){
return 49.0 * (dot(m0*m0, vec3(dot(p0, x0), dot(p1, x1), dot(p2, x2)))+ dot(m1*m1, vec2(dot(p3, x3), dot(p4, x4))));
}
float onoise(vec4 pos, int octaves, float falloff, float scl, float po){
float sum = 0.0;
float samp = 0.0;
float amp = 1.0;
float cscl = scl;
for (int i = 0; i < octaves; i ++){
sum += (snoise(pos / vec4(cscl, cscl, cscl, 1.0)) + 1.0) / 2.0 * amp;
cscl /= 2.0;
samp += amp;
amp *= falloff;
}
return pow(sum / samp, po);
}
void main(){
vec4 pos = a_position;
float height = onoise(vec4(a_position.xyz, u_time + u_seed), u_octaves, u_falloff, u_scale, u_power);
int cindex = int(height * float(u_colornum));
float dst = 1.0 - (u_magnitude/2.0) + height*u_magnitude;
v_height = (height + (onoise(vec4(a_position.xyz, u_time + u_seed*2.0), u_octaves, u_falloff, u_scale, u_power) - 0.5) / 6.0 - 0.5) * u_spread + 0.5;
gl_Position = u_proj * u_trans * a_position; //u_proj * (a_position + vec4(pos.xyz * (dst - 1.0), 0.0));
v_height = clamp((snoise(vec4(a_position.xyz, u_time + u_seed*2.0) / u_scale) + 0.7) / 2.0, 0.0, 1.0);
gl_Position = u_proj * u_trans * a_position;
}