1  /* ************************************************************************** */
 2  /*                                                                            */
 3  /*                                                        :::      ::::::::   */
 4  /*   raytracer.c                                        :+:      :+:    :+:   */
 5  /*                                                    +:+ +:+         +:+     */
 6  /*   By: salee2 <salee2@student.42seoul.kr>         +#+  +:+       +#+        */
 7  /*                                                +#+#+#+#+#+   +#+           */
 8  /*   Created: 2023/05/24 20:23:15 by salee2            #+#    #+#             */
 9  /*   Updated: 2023/05/24 20:23:16 by salee2           ###   ########.fr       */
10  /*                                                                            */
11  /* ************************************************************************** */
12  
13  #include "include/minirt.h"
14  
15  t_raytracer	raytracer_(const int width, const int height)
16  {
17  	t_raytracer this;
18  
19  	this.width = width;
20  	this.height = height;
21  	return this;
22  }
23  
24  t_vec3	screen_to_world(t_vec2 pos_screen, t_raytracer* raytracer)
25  {
26  	double x_scale = 2.0 / (raytracer->width - 1);
27  	double y_scale = 2.0 / (raytracer->height - 1);
28  	double aspect = (double) raytracer->width / raytracer->height;
29  
30  	return vec3_((pos_screen.x * x_scale - 1.0) * aspect,
31  				-pos_screen.y * y_scale + 1.0, 0.0);
32  }
33  
34  /*
35  t_vec3 trace_ray(t_ray* ray, t_raytracer* raytracer)
36  {
37  	t_hit hit = intersect_ray_collision(ray, &raytracer->sphere);
38  
39  	if(hit.t < 0.0)
40  	{
41  		return vec3_(0.0, 0.0, 0.0);
42  	}
43  	else
44  	{
45  //		return scl_mul(raytracer->sphere.color, hit.t);
46  		return vec3_(1.0, 0.0, 0.0);
47  	}
48  }
49  */
50  /*
51  
52  void render()
53  {
54  	const int image_width = 1280;
55  	const int image_height = 720;
56  
57  	printf("P3\n%d %d\n255\n", image_width, image_height);
58  
59  	t_raytracer raytracer = raytracer_(image_width, image_height);
60  
61  	t_vec3* pixels = malloc(sizeof(t_vec3) * image_width * image_height);
62  	for (int x = 0; x < image_width * image_height; ++x)
63  		pixels[x] = color(0.0, 0.0, 0.25);
64  
65  	for (int y = 0; y < image_height; ++y) {
66  		for (int x = 0; x < image_width; ++x) {
67  
68  			t_vec3 pixel_pos_world = screen_to_world(vec2_(x, y), &raytracer);
69  
70  			t_vec3 ray_dir = vec3_(0.0, 0.0, -1.0);
71  
72  			t_ray pixel_ray = ray_(pixel_pos_world, ray_dir);
73  			pixels[x + y * image_width] = trace_ray(&pixel_ray, &raytracer);
74  //			t_vec3 * cur = &pixels[x+y*image_width];
75  //			printf("%f %f %f\n", cur->r, cur->g, cur->b);
76  		}
77  	}
78  
79  	for (int y = 0; y < image_height; ++y) {
80  		for (int x = 0; x < image_width; ++x) {
81  			int ir = 255.999 * pixels->r;
82  			int ig = 255.999 * pixels->g;
83  			int ib = 255.999 * pixels->b;
84  			printf("%d %d %d\n", ir, ig, ib);
85  		}
86  	}
87  
88  }
89  */