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