From 33bc9a99eaac61ae38751fc78127859c66ef2e14 Mon Sep 17 00:00:00 2001
From: Alexander Gauggel <agauggel@uni-koblenz.de>
Date: Thu, 24 Jun 2021 21:00:10 +0200
Subject: [PATCH] [#82] Add small ambient light factor to volumetric lighting
---
projects/voxelization/resources/shaders/lightInfo.inc | 9 +++++----
projects/voxelization/resources/shaders/shader.frag | 3 +++
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/projects/voxelization/resources/shaders/lightInfo.inc b/projects/voxelization/resources/shaders/lightInfo.inc
index 7cbf605e..a87f9ce7 100644
--- a/projects/voxelization/resources/shaders/lightInfo.inc
+++ b/projects/voxelization/resources/shaders/lightInfo.inc
@@ -2,10 +2,11 @@
#define LIGHT_INFO_INC
struct LightInfo{
- vec3 L; float padding;
- vec3 sunColor;
- float sunStrength;
- mat4 lightMatrix;
+ vec3 L;
+ float padding;
+ vec3 sunColor;
+ float sunStrength;
+ mat4 lightMatrix;
};
#endif // #ifndef LIGHT_INFO_INC
\ No newline at end of file
diff --git a/projects/voxelization/resources/shaders/shader.frag b/projects/voxelization/resources/shaders/shader.frag
index 0569abd1..ff8968ca 100644
--- a/projects/voxelization/resources/shaders/shader.frag
+++ b/projects/voxelization/resources/shaders/shader.frag
@@ -81,6 +81,7 @@ vec3 volumetricLighting(vec3 colorIn, vec3 V, vec3 pos, float d){
vec3 scatteringCoefficient = vec3(0.005);
vec3 absorptionCoefficient = vec3(0.01);
vec3 extinctionCoefficient = scatteringCoefficient + absorptionCoefficient;
+ vec3 ambientLight = vec3(0.2);
float noiseScale = 0.1;
pos += V * noiseScale * interleavedGradientNoise(gl_FragCoord.xy);
@@ -91,6 +92,8 @@ vec3 volumetricLighting(vec3 colorIn, vec3 V, vec3 pos, float d){
vec3 light = lightInfo.sunColor * lightInfo.sunStrength;
float shadow = shadowTest(samplePoint, lightInfo, shadowMap, shadowMapSampler, vec2(0));
light *= shadow;
+ light += ambientLight;
+
color += phase * light * scatteringCoefficient * stepSize;
color *= exp(-stepSize * extinctionCoefficient);
}
--
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