Pathtracing working with defuse and emissive lighting

1 files changed, 18 insertions, 2 deletions

diff --git a/src/render.hpp b/src/render.hpp
index bb4e9c5..1274bb5 100644
--- a/src/render.hpp
+++ b/src/render.hpp
@@ -5,13 +5,28 @@
 #include "ray.hpp"
 #include "scene.hpp"
 
+// Samples a random direction in a hemisphere, cosine weighed
+// https://blog.thomaspoulet.fr/uniform-sampling-on-unit-hemisphere/
+class Sampler {
+    public:
+        Sampler();
+        void seed(unsigned seed);
+
+        Vec3d sample(const Vec3d &norm);
+
+    private:
+        double random();
+        unsigned m_seed;
+};
+
 class Renderer {
     public:
-    Renderer(const Scene &scn, Vec3d eye, Vec3d target, unsigned width, unsigned height);
+    Renderer(const Scene &scn, Vec3d eye, Vec3d target, unsigned width, unsigned height, unsigned maxhops);
 
-    Color render(unsigned x, unsigned y);
+    Color render(unsigned x, unsigned y, unsigned samples);
 
     unsigned m_width, m_height;
+    Sampler m_sampler;
 
     private:
     void recalculate();
@@ -27,6 +42,7 @@ class Renderer {
 
     // User options
     Vec3d m_eye, m_target;
+    unsigned m_maxhops;
 
     // Calculated values
     Vec3d m_qx, m_qy, m_blc;