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Fixed shadow back projections

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This commit is contained in:
saschawillems 2016-09-02 14:53:44 +02:00
parent eaf76fd6e7
commit 26c39e9c67
3 changed files with 12 additions and 12 deletions
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18
data/shaders/raytracing/raytracing.comp
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@ -12,6 +12,7 @@ layout (binding = 0, rgba8) uniform writeonly image2D resultImage;
#define MAXLEN 1000.0
#define SHADOW 0.5
#define RAYBOUNCES 2
#define REFLECTIONS true
#define REFLECTIONSTRENGTH 0.4
#define REFLECTIONFALLOFF 0.5
@ -68,7 +69,7 @@ void reflectRay(inout vec3 rayD, in vec3 mormal)
float lightDiffuse(vec3 normal, vec3 lightDir)
{
return clamp(dot(normal, lightDir), 0.25, 1.0);
return clamp(dot(normal, lightDir), 0.1, 1.0);
}
float lightSpecular(vec3 normal, vec3 lightDir, float specularFactor)
@ -91,6 +92,7 @@ float sphereIntersect(in vec3 rayO, in vec3 rayD, in Sphere sphere)
return -1.0;
}
float t = (-b - sqrt(h)) / 2.0;
return t;
}
@ -144,14 +146,16 @@ int intersect(in vec3 rayO, in vec3 rayD, inout float resT)
return id;
}
float calcShadow(in vec3 rayO, in vec3 rayD, in int id)
float calcShadow(in vec3 rayO, in vec3 rayD, in int objectId, inout float t)
{
//todo: avoid backprojection
for (int i = 0; i < spheres.length(); i++)
{
if (spheres[i].id == objectId)
continue;
float tSphere = sphereIntersect(rayO, rayD, spheres[i]);
if (tSphere > EPSILON)
if ((tSphere > EPSILON) && (tSphere < t))
{
t = tSphere;
return SHADOW;
}
}
@ -212,7 +216,8 @@ vec3 renderScene(inout vec3 rayO, inout vec3 rayD, inout int id)
id = objectID;
// Shadows
color *= calcShadow(pos, lightVec, objectID);
t = length(ubo.lightPos - pos);
color *= calcShadow(pos, lightVec, id, t);
// Fog
color = fog(t, color);
@ -236,9 +241,8 @@ void main()
int id = 0;
vec3 finalColor = renderScene(rayO, rayD, id);
const bool reflections = true;
// Reflection
if (reflections)
if (REFLECTIONS)
{
float reflectionStrength = REFLECTIONSTRENGTH;
for (int i = 0; i < RAYBOUNCES; i++)

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data/shaders/raytracing/raytracing.comp.spv
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4
raytracing/raytracing.cpp
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@ -315,10 +315,6 @@ public:
spheres.push_back(newSphere(glm::vec3(1.75f, -0.5f, 0.0f), 1.0f, glm::vec3(0.0f, 1.0f, 0.0f), 32.0f));
spheres.push_back(newSphere(glm::vec3(0.0f, 1.0f, -0.5f), 1.0f, glm::vec3(0.65f, 0.77f, 0.97f), 32.0f));
spheres.push_back(newSphere(glm::vec3(-1.75f, -0.75f, -0.5f), 1.25f, glm::vec3(0.9f, 0.76f, 0.46f), 32.0f));
// spheres.push_back(newSphere(glm::vec3(-2.25f, -1.0f, 0.5f), 1.0f, glm::vec3(1.0f, 0.32f, 0.36f), 32.0f));
//spheres.push_back(newSphere(glm::vec3(-2.25f, 1.0f, 0.0f), 1.0f, glm::vec3(1.0f, 0.0f, 0.0f), glm::vec3(2.0f)));
//spheres.push_back(newSphere(glm::vec3(0.f, 2.5f, 0.0f), 1.0f, glm::vec3(0.0f, 0.0f, 1.0f), glm::vec3(2.0f)));
//spheres.push_back(newSphere(glm::vec3(2.25f, 1.0f, 0.0f), 1.0f, glm::vec3(0.0f, 1.0f, 0.0f), glm::vec3(2.0f)));
VkDeviceSize storageBufferSize = spheres.size() * sizeof(Sphere);
// Stage