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Code Issues 157 Wiki Activity

Let the base and the top of every cloud stand a little off those of its layer

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Hirek
2026-10-17 19:43:18 +02:00
parent df48637718
commit 1730f400ad
3 changed files with 53 additions and 15 deletions
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10
shaders/clouds_march.comp
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@@ -177,7 +177,8 @@ void main()
{
if (cloud_layers[i].extra.x > 0.5)
continue;
vec2 segment = cloud_layer_segment(direction.y, cloud_layers[i].heights.x, cloud_layers[i].heights.y);
vec2 bounds = cloud_layer_bounds(cloud_layers[i]);
vec2 segment = cloud_layer_segment(direction.y, bounds.x, bounds.y);
segment.y = min(segment.y, maxdistance);
if (segment.y <= segment.x)
continue;
@@ -223,9 +224,10 @@ void main()
// the light of the sky reaches inside through the cloud above, that of the ground through the cloud below: the base of a
// thick cloud is darker than its top, and greyer, lit only by the ground and the sky at its sides
float column = layer.shape.y * layer.shape.x;
float reach = min(layer.heights.y - height, CLOUD_SKY_REACH);
float sky = exp(-CLOUD_SKY_FADE * cloud_sky_depth(index, position, height, reach, skysteps) - CLOUD_AMBIENT_FADE * column * (layer.heights.y - height - reach));
float below = column * (height - layer.heights.x);
float top = cloud_layer_bounds(layer).y;
float reach = clamp(top - height, 0.0, CLOUD_SKY_REACH);
float sky = exp(-CLOUD_SKY_FADE * cloud_sky_depth(index, position, height, reach, skysteps) - CLOUD_AMBIENT_FADE * column * max(top - height - reach, 0.0));
float below = column * max(height - layer.heights.x, 0.0);
vec3 light = sunlight * sunshare + (ambienttop * mix(CLOUD_SKY_FLOOR, 1.0, sky) + ambientbottom * exp(-CLOUD_AMBIENT_FADE * below));
float through = exp(-density * step);
vec3 inscattered = light * (1.0 - through);