53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
#include "canvas.h"
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#include "exceptions.h"
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#include "ray.h"
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#include <stdio.h>
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#include <sphere.h>
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int main(void) {
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CEXCEPTION_T e;
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Try {
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double wall_z = 10;
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double wall_size = 7;
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unsigned int canvas_pixels = 500;
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double pixel_size = wall_size / canvas_pixels;
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double half = wall_size / 2;
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CANVAS_Canvas* canvas = CANVAS_new(canvas_pixels, canvas_pixels);
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TUPLES_Color red = TUPLES_color(1, 0, 0);
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TUPLES_Point ray_origin = TUPLES_point(0, 0, -5);
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SPHERE_Sphere* sphere = SPHERE_new();
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for (uint y=0; y < canvas_pixels - 1; y++) {
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double world_y = half - pixel_size * y;
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for (uint x=0; x < canvas_pixels - 1; x++) {
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double world_x = -half + pixel_size * x;
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TUPLES_Point position = TUPLES_point(world_x, world_y, wall_z);
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TUPLES_Vector v_tmp = TUPLES_normalize(TUPLES_subtract(ray_origin, position));
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RAY_Ray r;
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RAY_init_from_tuples(&r, position, v_tmp);
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RAY_Intersections* xs = SPHERE_intersect(sphere, &r, NULL);
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if (RAY_hit(xs)) {
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CANVAS_write_pixel(canvas, x, y, red);
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}
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RAY_delete_intersections(xs);
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RAY_destroy(&r);
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}
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}
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char *filename = "sphere_shadow.ppm";
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printf("Writing file %s...", filename);
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CANVAS_write_to_file(canvas, filename);
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printf("done\n");
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SPHERE_delete(sphere);
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CANVAS_delete(canvas);
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} Catch(e) {
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if (e == E_MALLOC_FAILED)
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printf("Malloc failed. Exiting\n");
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else if (e == E_FILE_FAILED)
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printf("Failed to open test.ppm\n");
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else
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printf("Unknown exception %i occurred\n", e);
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}
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return 0;
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}
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