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Project - Progressive Photon Mapping Implementation

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Ahmet Alperen Akcay and I chose implementing Progressive Photon Mapping for extending our ray tracers. However, since the flow of the algorithm is different and not suitable for adding to our raytracers' interfaces, we took only needed parts of my ray tracer and implemented it as a different project. Introduction Global illlumination is one of the core issues for computer graphics. There are several algorithms developed for simulating lighting of the scenes correctly and efficiently to solve the rendering equation (Kajiya, 1986). Proposed by Hachisuka and Jensen (2008), Progressive Photon Mapping is one of those algorithms developed through years. It can simulate illumination of caustic objects and Specular-Diffuse-Specular paths better and faster than other techniques. Yet, getting desired image quality still takes time. Related Work In the original Photon Mapping algorithm developed by Jensen (1996), there exists two different steps. In ...
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Homework 5 - Additional Light Sources, Tonemapping, HDR Output

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In the fifth assignment of CENG795, we are expected to introduce many new features to the ray tracer, such as: Directional Light Sources Spot Light Sources Photographic Tonemapping HDR Output In this assignment, I removed lodepng library and added OpenCV library to be able to generate both png and exr outputs. Directional and Spot Light Sources To introduce new light sources, I implemented an virtual base named "Light" for all the light sources. After converting old light types(which are point and area), I implemented Directional and Spot Light sources. My outputs are: cube_directional.png(800x800) is saved in: 72 milliseconds 499 microseconds dragon_spot_light_msaa.png(800x800) is saved in: 20 seconds 363 milliseconds 401 microseconds   Photographic Tonemapping For photographic tonemapping, I followed Reinhard's Photographic Reproduction Technique ( http://www.cmap.polytechnique.fr/~peyre/cours/x2005signal/hdr_photographic.pdf ). Note that...
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Homework 3 - Transformations, Instancing, Distribution Ray Tracing

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In the third assignment of CENG795, we are expected to introduce many new features to the ray tracer, such as:  Transformations  Instancing  Smooth shading  Distribution Ray Tracing Depth of field Soft shadows (area lights) Glossy reflections Motion blur Simple Camera(Constructed with fov, distance, and aspect ratio) PLY parsing Transformations and Instancing: First I implemented basic transformation classes and matrix operations. If a mesh instance, a sphere, or a primitive triangle has some transformations, I apply them to their bounding boxes for keeping the order of the bvh. For instancing, I separated mesh triangles and primitive triangles.  Primitive triangles and spheres convert the ray into their local space to check if it intersects.  Mesh instances converts the ray into local space of the their meshes to check if it intersects. Meshes and mesh triangles doesn't apply any transformation, they expect rays from their space. I...
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