112 lines
2.4 KiB
C++
112 lines
2.4 KiB
C++
#ifndef EX02_RAY_TRACER_HPP
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#define EX02_RAY_TRACER_HPP
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#define EX02_RAY_TRACER_VIEW_RATIO 0.5f
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#define EX02_RAY_TRACER_DEFAULT_NEAR_PLANE 0.2f
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#define EX02_RAY_TRACER_DEFAULT_FAR_PLANE 4.0f
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#define EX02_RAY_TRACER_COLL_INCREMENT 2.0f
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#define EX02_RAY_TRACER_GRAY_SPHERE_RADIUS 1.5f
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#include <vector>
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#include <optional>
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#include <string>
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#include <tuple>
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#include <mutex>
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#include <glm/vec3.hpp>
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#include <glm/mat4x4.hpp>
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#include <glm/matrix.hpp>
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namespace Ex02 {
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namespace RT {
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struct Pixel {
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Pixel();
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unsigned char r,g,b;
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};
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class Image {
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public:
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Image(unsigned int width, unsigned int height);
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Pixel& getPixel(unsigned int x, unsigned int y);
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const Pixel& getPixel(unsigned int x, unsigned int y) const;
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void writeToFile(const std::string &filename) const;
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private:
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unsigned int width;
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std::vector<Pixel> data;
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};
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namespace Internal {
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typedef std::optional<std::tuple<glm::vec3, glm::vec3>> RTSVisibleType;
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struct LightSource {
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LightSource();
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glm::vec3 pos;
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float falloffStart;
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float falloffEnd;
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glm::vec3 color;
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void applyLight(glm::vec3 pos, Pixel &pixelOut) const;
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void applyLight(glm::vec3 pos, Pixel &pixelOut, std::mutex *mutex) const;
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};
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struct Sphere {
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Sphere();
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glm::vec3 pos;
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float radius;
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std::optional<glm::vec3> rayToSphere(
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glm::vec3 rayPos, glm::vec3 rayDirUnit) const;
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RTSVisibleType rayToSphereVisible(
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glm::vec3 rayPos, glm::vec3 rayDirUnit,
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const LightSource &light) const;
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};
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// returns pos of collision
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std::optional<glm::vec3> rayToSphere(
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glm::vec3 rayPos,
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glm::vec3 rayDirUnit,
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glm::vec3 spherePos,
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float sphereRadius);
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float angleBetweenRays(
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glm::vec3 a,
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glm::vec3 b);
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float distBetweenPositions(
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glm::vec3 a,
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glm::vec3 b);
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// first vec3 is result from rayToSphere(), second is ray to light source
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RTSVisibleType rayToSphereVisible(
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glm::vec3 rayPos,
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glm::vec3 rayDirUnit,
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glm::vec3 spherePos,
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float sphereRadius,
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glm::vec3 lightPos);
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}
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Image renderGraySphere(
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unsigned int outputWidth,
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unsigned int outputHeight,
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unsigned int threadCount = 1
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);
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Image renderColorsWithSpheres(
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unsigned int outputWidth,
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unsigned int outputHeight,
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unsigned int threadCount = 1
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);
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} // namespace RT
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} // namespace Ex02
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#endif
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