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/*************************************************************************
* Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
#include "dimension.h"
#include <stdlib.h> /* For malloc */
dmnsn_scene *
dmnsn_new_scene(unsigned int x, unsigned int y)
{
dmnsn_scene *scene = malloc(sizeof(dmnsn_scene));
if (scene) {
scene->objects = dmnsn_new_array(sizeof(dmnsn_object*));
scene->canvas = dmnsn_new_canvas(x, y);
if (!scene->canvas) {
dmnsn_delete_array(scene->objects);
return NULL;
}
}
return scene;
}
void
dmnsn_delete_scene(dmnsn_scene *scene)
{
if (scene) {
dmnsn_delete_array(scene->objects);
free(scene);
}
}
void
dmnsn_raytrace_scene(dmnsn_scene *scene)
{
unsigned int i, j;
dmnsn_object *object;
dmnsn_line l;
l.x0 = dmnsn_vector_construct(0.0, 0.0, -3.0);
dmnsn_array_get(scene->objects, 0, &object);
for (i = 0; i < scene->canvas->x; ++i) {
for (j = 0; j < scene->canvas->y; ++j) {
l.n.x = 1.6*(((double)i)/(scene->canvas->x - 1) - 0.5);
l.n.y = ((double)j)/(scene->canvas->y - 1) - 0.5;
l.n.z = 1.0;
if ((*object->intersections_fn)(l)->length > 0) {
dmnsn_set_pixel(scene->canvas, i, j,
dmnsn_color_from_XYZ(dmnsn_whitepoint));
} else {
dmnsn_set_pixel(scene->canvas, i, j, scene->background);
}
}
}
}
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