1 files changed, 140 insertions, 0 deletions
diff --git a/src/raytracer/raytracer.h b/src/raytracer/raytracer.h
new file mode 100644
index 0000000..6a16cdf
--- /dev/null
+++ b/src/raytracer/raytracer.h
@@ -0,0 +1,140 @@
+#pragma once
+
+#include <glm/glm.hpp>
+#include "utils/rgba.h"
+#include "utils/sceneparser.h"
+#include "raytracescene.h"
+#include "accelerate/kdtree.h"
+#include "accelerate/bvh.h"
+
+// A forward declaration for the RaytraceScene class
+
+class RayTraceScene;
+
+// A class representing a ray-tracer
+
+const float FINF = std::numeric_limits<float>::infinity();
+static float mediumIor = 1.0f;
+
+struct Config {
+    bool enableShadow        = false;
+    bool enableReflection    = false;
+    bool enableRefraction    = false;
+    bool enableTextureMap    = false;
+    bool enableTextureFilter = false;
+    bool enableParallelism   = false;
+    bool enableSuperSample   = false;
+    bool enableAntiAliasing = false;
+    bool enableAcceleration  = false;
+    bool enableDepthOfField  = false;
+    int maxRecursiveDepth    = 4;
+    bool onlyRenderNormals   = false;
+};
+
+class RayTracer
+{
+public:
+    // constructor for the config
+    explicit RayTracer(const Config &config);
+    const Config &m_config;
+
+    // Renders the scene synchronously.
+    // The ray-tracer will render the scene and fill imageData in-place.
+    // @param imageData The pointer to the imageData to be filled.
+    // @param scene The scene to be rendered.
+    void render(RGBA *imageData, const RayTraceScene &scene);
+
+    // shadow
+    bool isShadowed(glm::vec4 lightPosition, float distanceToLight, glm::vec4 directionFromIntersectionToLight,
+                    glm::vec4 intersectionWorld, const RayTraceScene &scene);
+
+    // texture
+    glm::vec4 interpolateTexture(
+        glm::vec4 pObject,
+        const RenderShapeData &shape,
+        glm::vec4 illuminationToInterpolate);
+
+    glm::vec3 getNormal(
+            glm::vec4 intersectPointObject,
+            const RenderShapeData &shape,
+            const RayTraceScene &scene);
+
+    // ray tracing
+    glm::vec4 getPixelFromRay(
+            glm::vec4 pWorld,
+            glm::vec4 dWorld,
+            const RayTraceScene &scene,
+            int depth = 0);
+
+    // intersect
+    glm::vec4 findIntersection(
+            glm::vec4 p,
+            glm::vec4 d,
+            const RenderShapeData& shape);
+
+    // utils
+    static RGBA toRGBA(const glm::vec4 &illumination);
+    static bool floatEquals(float a, float b, float epsilon = 0.0001f);
+
+    // refracting, reflecting
+    glm::vec4 refract(
+            glm::vec3 intersectionWorld,
+            glm::vec3 normalWorld,
+            glm::vec3 incidentDir,
+            const RenderShapeData &shape,
+            const RayTraceScene &scene,
+            int depth);
+    glm::vec4 reflect(
+            glm::vec3 intersectionWorld,
+            glm::vec3 normalWorld,
+            glm::vec3 incidentDir,
+            const RenderShapeData &shape,
+            const RayTraceScene &scene,
+            int depth);
+    glm::vec4 illuminatePixel(
+            glm::vec3 intersectionWorld,
+            glm::vec3 normalWorld,
+            glm::vec3 directionToCamera,
+            const RenderShapeData &shape,
+            const RayTraceScene &scene,
+            int depth);
+
+
+    // shading, and helpers for each type of light
+    glm::vec4
+    phong(glm::vec4 lightColor, float attenuation, glm::vec3 directionFromIntersectionToLight,
+          glm::vec3 directionToCamera,
+          glm::vec3 intersectionWorld, glm::vec3 normalWorld, const RenderShapeData &shape, const RayTraceScene &scene);
+
+    glm::vec4
+    illuminationFromPointLight(const SceneLightData &light, glm::vec3 intersectionWorld, glm::vec3 normalWorld,
+                               glm::vec3 directionToCamera, const RenderShapeData &shape,
+                               const RayTraceScene &scene);
+
+    glm::vec4 illuminationFromSpotLight(const SceneLightData &light, glm::vec3 intersectionWorld, glm::vec3 normalWorld,
+                                        glm::vec3 directionToCamera, const RenderShapeData &shape,
+                                        const RayTraceScene &scene);
+
+    glm::vec4
+    illuminationFromDirectionalLight(const SceneLightData &light, glm::vec3 intersectionWorld, glm::vec3 normalWorld,
+                                     glm::vec3 directionToCamera, const RenderShapeData &shape,
+                                     const RayTraceScene &scene);
+
+    glm::vec4 illuminationFromAreaLight(const SceneLightData &light, glm::vec3 intersectionWorld, glm::vec3 normalWorld,
+                                        glm::vec3 directionToCamera, const RenderShapeData &shape,
+                                        const RayTraceScene &scene);
+
+
+    // acceleration data structures
+    void renderParallel(RGBA *imageData, const RayTraceScene &scene);
+    float traverse(glm::vec4 p, glm::vec4 d, float tStart, float tEnd, RenderShapeData &testShape, KdTree *tree);
+    float traverseBVH(glm::vec4 p, glm::vec4 d, RenderShapeData &testShape, bvh *root);
+
+    // aliasing
+    RGBA superSample(glm::vec4 eyeCamera, glm::vec4 pixelDirCamera, const RayTraceScene &scene);
+    void filterBlur(RGBA *imageData, int width, int height, float blurRadius = 3.f);
+
+    // depth of field
+    glm::vec4 secondaryRays(glm::vec4 pWorld, glm::vec4 dWorld, RayTraceScene &scene);
+};
+