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Merge branch 'waterscatter' into 'master'

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Use sun visibility for sunlight scattering (bug #7309)

Closes #7309

See merge request OpenMW/openmw!3478
This commit is contained in:
Cody Glassman 2023-12-28 22:18:03 +00:00
commit c53abd870b
2 changed files with 3 additions and 2 deletions
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1
CHANGELOG.md
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@ -73,6 +73,7 @@
Bug #7292: Weather settings for disabling or enabling snow and rain ripples don't work
Bug #7298: Water ripples from projectiles sometimes are not spawned
Bug #7307: Alchemy "Magic Effect" search string does not match on tool tip for effects related to attributes
Bug #7309: Sunlight scattering is visible in inappropriate situations
Bug #7322: Shadows don't cover groundcover depending on the view angle and perspective with compute scene bounds = primitives
Bug #7354: Disabling post processing in-game causes a crash
Bug #7364: Post processing is not reflected in savegame previews

4
files/shaders/compatibility/water.frag
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@ -174,7 +174,7 @@ void main(void)
vec3 waterColor = WATER_COLOR * sunFade;
vec4 sunSpec = lcalcSpecular(0);
// alpha component is sun visibility; we want to start fading specularity when visibility is low
// alpha component is sun visibility; we want to start fading lighting effects when visibility is low
sunSpec.a = min(1.0, sunSpec.a / SUN_SPEC_FADING_THRESHOLD);
// artificial specularity to make rain ripples more noticeable
@ -203,7 +203,7 @@ void main(void)
float sunHeight = lVec.z;
vec3 scatterColour = mix(SCATTER_COLOUR*vec3(1.0,0.4,0.0), SCATTER_COLOUR, clamp(1.0-exp(-sunHeight*SUN_EXT), 0.0, 1.0));
vec3 lR = reflect(lVec, lNormal);
float lightScatter = clamp(dot(lVec,lNormal)*0.7+0.3, 0.0, 1.0) * clamp(dot(lR, vVec)*2.0-1.2, 0.0, 1.0) * SCATTER_AMOUNT * sunFade * clamp(1.0-exp(-sunHeight), 0.0, 1.0);
float lightScatter = clamp(dot(lVec,lNormal)*0.7+0.3, 0.0, 1.0) * clamp(dot(lR, vVec)*2.0-1.2, 0.0, 1.0) * SCATTER_AMOUNT * sunFade * sunSpec.a * clamp(1.0-exp(-sunHeight), 0.0, 1.0);
gl_FragData[0].xyz = mix(mix(refraction, scatterColour, lightScatter), reflection, fresnel) + specular * sunSpec.rgb * sunSpec.a + rainSpecular;
gl_FragData[0].w = 1.0;