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Better high-quality clouds

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This commit is contained in:
Joshua Barretto 2020-11-11 17:56:04 +00:00
parent 25c50de347
commit 2b5e09e32e
2 changed files with 12 additions and 4 deletions
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4
assets/voxygen/shaders/include/cloud/regular.glsl
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@ -7,8 +7,8 @@ const float CLOUD_DENSITY = 150.0;
vec2 get_cloud_heights(vec2 pos) {
const float CLOUD_HALF_WIDTH = 300;
const float CLOUD_HEIGHT_VARIATION = 1000.0;
float cloud_alt = CLOUD_AVG_ALT + (texture(t_noise, pos.xy * 0.0001).x - 0.5) * CLOUD_HEIGHT_VARIATION;
const float CLOUD_HEIGHT_VARIATION = 1500.0;
float cloud_alt = CLOUD_AVG_ALT + (texture(t_noise, pos.xy * 0.00005).x - 0.5) * CLOUD_HEIGHT_VARIATION;
#if (CLOUD_MODE != CLOUD_MODE_MINIMAL)
cloud_alt += (texture(t_noise, pos.xy * 0.001).x - 0.5) * 0.1 * CLOUD_HEIGHT_VARIATION;
#endif

12
assets/voxygen/shaders/include/sky.glsl
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@ -70,7 +70,12 @@ const float wind_speed = 0.25;
vec2 wind_offset = vec2(time_of_day.x * wind_speed);
float cloud_tendency_at(vec2 pos) {
return clamp(texture(t_noise, (pos + wind_offset) * 0.000075).x - 0.5, 0, 1);
float nz = texture(t_noise, (pos + wind_offset) * 0.000075).x - 0.5;
nz = clamp(nz, 0, 1);
#if (CLOUD_MODE == CLOUD_MODE_MEDIUM || CLOUD_MODE == CLOUD_MODE_HIGH)
nz += (texture(t_noise, (pos + wind_offset) * 0.00035).x - 0.5) * 0.15;
#endif
return nz;
}
float cloud_shadow(vec3 pos, vec3 light_dir) {
@ -82,8 +87,11 @@ float cloud_shadow(vec3 pos, vec3 light_dir) {
// Fade out shadow if the sun angle is too steep (simulates a widening penumbra with distance)
const vec2 FADE_RANGE = vec2(1500, 10000);
float fade = 1.0 - clamp((length(xy_offset) - FADE_RANGE.x) / (FADE_RANGE.y - FADE_RANGE.x), 0, 1);
float cloud = cloud_tendency_at(pos.xy + focus_off.xy - xy_offset);
return max(0, 1 - fade * cloud_tendency_at(pos.xy + focus_off.xy - xy_offset) * 3.0);
cloud = cloud * 2.0;
return clamp(1 - fade * cloud * 3.0, 0, 1);
#endif
}