194 lines
8.7 KiB
C
194 lines
8.7 KiB
C
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//
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// Created by brett on 7/17/23.
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//
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#ifndef PARKSNREC_UTIL_H
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#define PARKSNREC_UTIL_H
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#include <random>
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#include <blt/std/time.h>
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#include <variant>
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#include "blt/math/vectors.h"
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#include "blt/std/logging.h"
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namespace parks {
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constexpr unsigned int WIDTH = 512;
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constexpr unsigned int HEIGHT = 512;
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constexpr unsigned int CHANNELS = 3;
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enum class ParameterType {
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SCALAR, COLOR, VARIABLE, IMAGE
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};
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struct Image {
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std::shared_ptr<double> image;
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unsigned int width, height;
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void write(unsigned int x, unsigned int y, const blt::vec3d& color) const {
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auto pos = x * CHANNELS + y * width * CHANNELS;
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image.get()[pos] = color.x();
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image.get()[pos + 1] = color.y();
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image.get()[pos + 2] = color.z();
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}
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[[nodiscard]] blt::vec3d read(unsigned int x, unsigned int y) const {
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auto pos = x * CHANNELS + y * width * CHANNELS;
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auto r = image.get()[pos];
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auto g = image.get()[pos + 1];
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auto b = image.get()[pos + 2];
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return blt::vec3d{r, g, b};
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}
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};
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struct Parameter {
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private:
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ParameterType type;
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std::variant<double, blt::vec3d, unsigned int, Image> value;
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public:
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explicit Parameter(double s): value(s) {type = ParameterType::SCALAR;}
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explicit Parameter(blt::vec3d c): value(c) {type = ParameterType::COLOR;}
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explicit Parameter(unsigned int v): value(v) {type = ParameterType::VARIABLE;}
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explicit Parameter(Image&& i): value(i) {type = ParameterType::IMAGE;}
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[[nodiscard]] ParameterType getType() const {
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return type;
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}
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template<typename T>
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[[nodiscard]] T& get() {
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return std::get<T>(value);
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}
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template<typename T>
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[[nodiscard]] const T& get() const {
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return std::get<T>(value);
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}
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template<typename Op>
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Parameter apply(Op f, double scalar) const {
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if (type == ParameterType::SCALAR)
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return Parameter{f(get<double>(), scalar)};
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else if (type == ParameterType::COLOR) {
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auto color = get<blt::vec3d>();
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return Parameter{blt::vec3d{f(color.x(), scalar), f(color.y(), scalar), f(color.z(), scalar)}};
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} else if (type == ParameterType::VARIABLE){
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return Parameter{f((double)get<unsigned int>(), scalar)};
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} else if (type == ParameterType::IMAGE){
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auto image = get<Image>();
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auto newImage = Image{std::shared_ptr<double>(new double[image.width * image.height * CHANNELS]), image.width, image.height};
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for (unsigned int i = 0; i < image.width; i++){
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for (unsigned int j = 0; j < image.height; j++){
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auto oldColor = image.read(i, j);
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newImage.write(i, j, blt::vec3d{f(oldColor.x(), scalar), f(oldColor.y(), scalar), f(oldColor.z(), scalar)});
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}
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}
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return Parameter{std::move(newImage)};
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}
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}
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template<typename Op>
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Parameter apply(Op f, const blt::vec3d& color) const {
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if (type == ParameterType::SCALAR)
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return Parameter{blt::vec3d{f(get<double>(), color.x()), f(get<double>(), color.y()), f(get<double>(), color.z())}};
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else if (type == ParameterType::COLOR) {
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auto ourColor = get<blt::vec3d>();
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return Parameter{blt::vec3d{f(ourColor.x(), color.x()), f(ourColor.y(), color.y()), f(ourColor.z(), color.z())}};
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} else if (type == ParameterType::VARIABLE){
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return Parameter{blt::vec3d{f(get<unsigned int>(), color.x()), f(get<unsigned int>(), color.y()), f(get<unsigned int>(), color.z())}};
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} else if (type == ParameterType::IMAGE){
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auto image = get<Image>();
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auto newImage = Image{std::shared_ptr<double>(new double[image.width * image.height * CHANNELS]), image.width, image.height};
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for (unsigned int i = 0; i < image.width; i++){
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for (unsigned int j = 0; j < image.height; j++){
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auto oldColor = image.read(i, j);
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newImage.write(i, j, blt::vec3d{f(oldColor.x(), color.x()), f(oldColor.y(), color.y()), f(oldColor.z(), color.z())});
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}
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}
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return Parameter{std::move(newImage)};
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}
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}
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template<typename Op>
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Parameter apply(Op f, unsigned int variable) const {
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if (type == ParameterType::SCALAR)
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return Parameter{f(get<double>(), (double) variable)};
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else if (type == ParameterType::COLOR) {
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auto color = get<blt::vec3d>();
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return Parameter{blt::vec3d{f(color.x(), (double) variable), f(color.y(), (double)variable), f(color.z(), (double)variable)}};
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} else if (type == ParameterType::VARIABLE){
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return Parameter{f(get<unsigned int>(), variable)};
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} else if (type == ParameterType::IMAGE){
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auto image = get<Image>();
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auto newImage = Image{std::shared_ptr<double>(new double[image.width * image.height * CHANNELS]), image.width, image.height};
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for (unsigned int i = 0; i < image.width; i++){
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for (unsigned int j = 0; j < image.height; j++){
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auto oldColor = image.read(i, j);
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newImage.write(i, j, blt::vec3d{f(oldColor.x(), (double)variable), f(oldColor.y(), (double)variable), f(oldColor.z(), (double)variable)});
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}
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}
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return Parameter{std::move(newImage)};
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}
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}
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template<typename Op>
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Parameter apply(Op f, const Image& image) const {
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if (type == ParameterType::IMAGE){
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auto ourImage = get<Image>();
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if (ourImage.width != image.width || ourImage.height != image.height){
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BLT_ERROR("Unable to apply to images of differing sizes!");
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throw std::runtime_error("Unable to apply to images of differing sizes!");
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}
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auto newImage = Image{std::shared_ptr<double>(new double[ourImage.width * ourImage.height * CHANNELS]), ourImage.width, ourImage.height};
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for (unsigned int i = 0; i < ourImage.width; i++){
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for (unsigned int j = 0; j < ourImage.height; j++){
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auto oldColor = ourImage.read(i, j);
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auto newColor = image.read(i, j);
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newImage.write(i, j, blt::vec3d{f(oldColor.x(), (double)newColor.x()), f(oldColor.y(), (double)newColor.y()), f(oldColor.z(), (double)newColor.z())});
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}
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}
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return Parameter{std::move(newImage)};
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} else {
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BLT_WARN("Please apply non-images to images instead of images to non-images");
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}
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}
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template<typename Op>
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inline Parameter apply(Op f, const Parameter& param) const {
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if (param.type == ParameterType::SCALAR)
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return apply(f, param.get<double>());
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else if (type == ParameterType::COLOR)
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return apply(f, param.get<blt::vec3d>());
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else if (type == ParameterType::VARIABLE)
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return apply(f, param.get<unsigned int>());
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else
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return apply(f, param.get<Image>());
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}
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};
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inline static double randomDouble(double min, double max) {
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std::mt19937 rng(blt::system::getCurrentTimeNanoseconds());
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static std::uniform_real_distribution<double> gen(0, 1);
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return gen(rng) * (max - min) + min;
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}
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inline static int randomInt(int min, int max) {
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return (int)randomDouble(min, max);
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}
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inline static bool chance(double bound = 0.5){
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return randomDouble(0, 1) < bound;
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}
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}
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#endif //PARKSNREC_UTIL_H
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