mirror of
https://github.com/zhenyan121/Cubed.git
synced 2026-06-21 18:17:03 +08:00
a8d2ddbacd
* feat(shaders): add lighting to block accumulation OIT shaders * feat(renderer): add water rendering with OIT and new shaders * feat(water): implement screen-space reflection and refraction for water with depth fade and perturbation * refactor(shader): replace glUniform calls with generic set_loc and remove cached locations * feat(water): add noise-based caustics and configurable fog density * fix(water shader): update depth fade and remove underwater check - Increase DEPTH_FADE_DISTANCE from 8 to 10 - Remove conditional so depth fade always applies - Darken deepColor from (0, 0.08, 0.15) to (0, 0.015, 0.045) * feat(underwater): add volume scattering and shadow mapping for light shafts
102 lines
2.2 KiB
GLSL
102 lines
2.2 KiB
GLSL
#version 460
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in vec3 dir;
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out vec4 frag_color;
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uniform vec3 skyTop;
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uniform vec3 skyBottom;
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uniform vec3 sunDir;
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uniform vec3 sunColor;
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uniform float horizonSharpness;
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uniform float cloudWhiteMix;
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uniform float cloudThresholdLow;
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uniform float cloudThresholdHigh;
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uniform float time;
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float hash(vec2 p) {
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return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
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}
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float noise(vec2 p) {
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vec2 i = floor(p);
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vec2 f = fract(p);
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f = f * f * (3.0 - 2.0 * f);
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float a = hash(i);
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float b = hash(i + vec2(1.0, 0.0));
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float c = hash(i + vec2(0.0, 1.0));
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float d = hash(i + vec2(1.0, 1.0));
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return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
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}
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float fbm(vec2 p) {
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float v = 0.0;
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float amp = 0.5;
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for (int i = 0; i < 5; i++) {
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v += amp * noise(p);
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p *= 2.0;
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amp *= 0.5;
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}
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return v;
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}
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vec3 computeSkyColor(vec3 dir) {
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vec3 sund = normalize(sunDir);
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float t =
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clamp(
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dir.y * 0.5 + 0.5,
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0.0,
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1.0
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);
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vec3 sky =
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mix(
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skyBottom,
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skyTop,
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pow(t, horizonSharpness)
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);
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// cloud
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if (dir.y > 0.0) {
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vec2 cloud_uv = dir.xz / (dir.y + 0.15) * 0.5 + vec2(time * 0.005, time * 0.002);
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float cloud_density = fbm(cloud_uv * 2.0);
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float safeLow = cloudThresholdLow;
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float safeHigh = max(cloudThresholdHigh, cloudThresholdLow + 0.001);
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cloud_density = smoothstep(safeLow,safeHigh, cloud_density);
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float fade = smoothstep(0.0, 0.3, dir.y) * (1.0 - smoothstep(0.85, 1.0, dir.y));
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cloud_density *= fade;
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vec3 cloud_color = mix(skyBottom, vec3(1.0), cloudWhiteMix);
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sky = mix(sky, cloud_color, cloud_density * 0.6);
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}
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float sunAmount = max(dot(dir, sund), 0.0);
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//float glow = pow(sunAmount, 8.0) * 0.15;
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float glow = pow(sunAmount, 8.0) * 0.15 + pow(sunAmount, 32.0) * 0.3;
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sky += glow * sunColor;
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return sky;
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}
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void main(void) {
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vec3 sky = computeSkyColor(dir);
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frag_color = vec4(sky, 1.0);
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//frag_color = vec4(vec3(sunAmount), 1.0);
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//frag_color = vec4(t,0,0,1);
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} |