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add "atmosphere ground" setting. this is to make the dark bottom of the sky optional.

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Xonk
2024-01-10 19:47:27 -05:00
parent f9024fb91b
commit 4ad17fc9aa
7 changed files with 33 additions and 23 deletions
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7
shaders/lib/ROBOBO_sky.glsl
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@ -95,7 +95,12 @@ vec3 sky_transmittance(vec3 position, vec3 direction, const float steps) {
vec3 calculateAtmosphere(vec3 background, vec3 viewVector, vec3 upVector, vec3 sunVector, vec3 moonVector, out vec2 pid, out vec3 transmittance, const int iSteps, float noise) {
const int jSteps = 4;
float planetGround = exp(-100 * pow(max(-viewVector.y*5 + 0.1,0.0),2)); // darken the ground in the sky.
#ifdef SKY_GROUND
float planetGround = exp(-100 * pow(max(-viewVector.y*5 + 0.1,0.0),2)); // darken the ground in the sky.
#else
float planetGround = pow(clamp(viewVector.y+1.0,0.0,1.0),2); // darken the ground in the sky.
#endif
float GroundDarkening = max(planetGround * 0.7+0.3,clamp(sunVector.y*2.0,0.0,1.0));
vec3 viewPos = (sky_planetRadius + eyeAltitude) * upVector;