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Added light loss to refraction shader

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This commit is contained in:
Maximilian Giller 2023-01-24 20:23:16 +01:00
parent 3b76969ff2
commit dcae587b8c
2 changed files with 10 additions and 4 deletions
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11
shader/refractionshader.cpp
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@ -1,8 +1,8 @@
#include "scene/scene.h" #include "scene/scene.h"
#include "shader/refractionshader.h" #include "shader/refractionshader.h"
RefractionShader::RefractionShader(float indexInside, float indexOutside, Color const &objectColor) : indexInside( RefractionShader::RefractionShader(float indexInside, float indexOutside, Color const &objectColor, float lightLoss) : indexInside(
indexInside), indexOutside(indexOutside), objectColor(objectColor) indexInside), indexOutside(indexOutside), objectColor(objectColor), lightLoss(lightLoss)
{} {}
Color RefractionShader::shade(Scene const &scene, Ray const &ray) const Color RefractionShader::shade(Scene const &scene, Ray const &ray) const
@ -51,7 +51,12 @@ Color RefractionShader::shade(Scene const &scene, Ray const &ray) const
} }
// Send out a new refracted ray into the scene // Send out a new refracted ray into the scene
return scene.traceRay(refractionRay) * objectColor; Color hitColor = scene.traceRay(refractionRay);
// Calculate light lost
float lightRemaining = 1;
if (refractionRay.primitive == ray.primitive) lightRemaining = 1 - lightLoss + exp(-refractionRay.length / 10) * lightLoss;
return hitColor * objectColor * lightRemaining;
} }
return Color(0.0f, 0.0f, 0.0f); return Color(0.0f, 0.0f, 0.0f);
} }

3
shader/refractionshader.h
View file

@ -8,7 +8,7 @@ class RefractionShader : public Shader
public: public:
// Constructor // Constructor
RefractionShader(float indexInside, float indexOutside, Color const &objectColor = Color(1, 1, 1)); RefractionShader(float indexInside, float indexOutside, Color const &objectColor = Color(1, 1, 1), float lightLoss = 0);
// Shader functions // Shader functions
Color shade(Scene const &scene, Ray const &ray) const override; Color shade(Scene const &scene, Ray const &ray) const override;
@ -18,6 +18,7 @@ public:
private: private:
float indexInside; float indexInside;
float indexOutside; float indexOutside;
float lightLoss;
Color objectColor; Color objectColor;
}; };