128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
#include "Triangle.hpp"
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#include "rasterizer.hpp"
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#include <eigen3/Eigen/Eigen>
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#include <iostream>
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#include <opencv2/opencv.hpp>
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constexpr double MY_PI = 3.1415926;
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Eigen::Matrix4f get_view_matrix(Eigen::Vector3f eye_pos)
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{
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Eigen::Matrix4f view = Eigen::Matrix4f::Identity();
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Eigen::Matrix4f translate;
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translate << 1, 0, 0, -eye_pos[0],
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0, 1, 0, -eye_pos[1],
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0, 0, 1, -eye_pos[2],
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0, 0, 0, 1;
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view = translate * view;
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return view;
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}
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Eigen::Matrix4f get_model_matrix(float rotation_angle)
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{
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Eigen::Matrix4f model = Eigen::Matrix4f::Identity();
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// TODO: Implement this function
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// Create the model matrix for rotating the triangle around the Z axis.
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model << cosf(rotation_angle),-sinf(rotation_angle),0,0,
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sinf(rotation_angle),cosf(rotation_angle),0,0,
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0,0,1,0,
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0,0,0,1;
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// Then return it.
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return model;
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}
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Eigen::Matrix4f get_projection_matrix(float eye_fov, float aspect_ratio,
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float zNear, float zFar)
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{
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// Students will implement this function
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Eigen::Matrix4f projection = Eigen::Matrix4f::Identity();
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projection << (1/tanf(eye_fov/2))/aspect_ratio,0,0,0,
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0,1/tanf(eye_fov),0,0,
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0,0,(zNear+zFar)/(zNear-zFar),-(2*zNear*zFar)/(zNear-zFar),
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0,0,1,0;
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// TODO: Implement this function
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// Create the projection matrix for the given parameters.
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// Then return it.
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return projection;
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}
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int main(int argc, const char** argv)
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{
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float angle = 0;
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bool command_line = false;
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std::string filename = "output.png";
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if (argc >= 3) {
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command_line = true;
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angle = std::stof(argv[2]); // -r by default
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if (argc == 4) {
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filename = std::string(argv[3]);
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}
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}
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rst::rasterizer r(700, 700);
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Eigen::Vector3f eye_pos = {0, 0, 5};
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std::vector<Eigen::Vector3f> pos{{2, 0, -2}, {0, 2, -2}, {-2, 0, -2}};
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std::vector<Eigen::Vector3i> ind{{0, 1, 2}};
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auto pos_id = r.load_positions(pos);
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auto ind_id = r.load_indices(ind);
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int key = 0;
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int frame_count = 0;
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if (command_line) {
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r.clear(rst::Buffers::Color | rst::Buffers::Depth);
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r.set_model(get_model_matrix(angle));
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r.set_view(get_view_matrix(eye_pos));
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r.set_projection(get_projection_matrix(45, 1, 0.1, 50));
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r.draw(pos_id, ind_id, rst::Primitive::Triangle);
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cv::Mat image(700, 700, CV_32FC3, r.frame_buffer().data());
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image.convertTo(image, CV_8UC3, 1.0f);
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cv::imwrite(filename, image);
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return 0;
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}
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while (key != 27) {
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r.clear(rst::Buffers::Color | rst::Buffers::Depth);
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r.set_model(get_model_matrix(angle));
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r.set_view(get_view_matrix(eye_pos));
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r.set_projection(get_projection_matrix(45, 1, 0.1, 50));
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r.draw(pos_id, ind_id, rst::Primitive::Triangle);
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cv::Mat image(700, 700, CV_32FC3, r.frame_buffer().data());
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image.convertTo(image, CV_8UC3, 1.0f);
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cv::imshow("image", image);
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key = cv::waitKey(10);
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std::cout << "frame count: " << frame_count++ << '\n';
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if (key == 'a') {
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angle += 10;
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}
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else if (key == 'd') {
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angle -= 10;
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}
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}
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return 0;
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}
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