Droog71/oolite
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added some more density to the atmospheres and slightly simplified shader in doing so.

Browse Source
This commit is contained in:
AnotherCommander 2019-01-04 14:26:27 +01:00
parent 7c78819f7e
commit 56dd34a059
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
Resources/Shaders/oolite-default-atmosphere.fragment
View File

@ -36,7 +36,7 @@ varying vec3 vLight1Vector;
const vec3 biasColor = vec3(0.0, 0.0, 1.0);
const vec3 kTerminatorThreshold = vec3(0.105, 0.18, 0.28); // old: vec3(0.1, 0.105, 0.12);
const float kFresnelExponent = 5.0;
const float kFresnelExponent = 2.0;
const float biasColorMixRatio = 0.35;
@ -89,11 +89,12 @@ void main()
// calculate when the atmosphere should fade in / out
float quant = atmDistance < (minDistance + 2000.0) ?
magicDistance / 2000.0 : 1.0;
float magFresnel = length(fresnel);
// calculate final opacity, special handling for angles > arccos(cosThreshold)
// to fade atmosphere out at its edge
float newOpacity = NdotV > cosThreshold ? magFresnel * quant : pow(NdotV / cosThreshold, newOpacityExponent) * quant;
// calculate the final opacity, special handling for
// angles > arccos(cosThreshold) to fade atmosphere out at its edge
float newOpacity = quant * (NdotV > cosThreshold ?
length(fresnel) * cosThreshold / NdotV :
pow(NdotV / cosThreshold, newOpacityExponent));
gl_FragColor = vec4(totalColor, newOpacity);
}