/
draw.c
executable file
·103 lines (93 loc) · 2.57 KB
/
draw.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* draw.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: tmack <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2016/06/05 15:24:17 by tmack #+# #+# */
/* Updated: 2016/06/20 16:18:57 by tmack ### ########.fr */
/* */
/* ************************************************************************** */
#include "fdf.h"
void draw_map(t_win *win)
{
int i;
int j;
j = 0;
while (j < win->map_h)
{
i = 0;
while (i < win->map_w)
{
if (i < win->map_w - 1)
draw_line(win, &(win->map[j][i]), &(win->map[j][i + 1]));
if (j < win->map_h - 1)
draw_line(win, &(win->map[j][i]), &(win->map[j + 1][i]));
i++;
}
j++;
}
}
void draw_line(t_win *win, t_point *p1, t_point *p2)
{
int x;
int y;
int temp;
t_bres *bres;
bres = bres_construct(p1, p2, (win->max_z));
x = p1->d2x;
y = p1->d2y;
while (1)
{
draw_point(win, x, y, p1->colour);
if (x == p2->d2x && y == p2->d2y)
break ;
if ((temp = bres->dline) > -(bres->dx))
{
bres->dline -= bres->dy;
x += bres->sx;
}
if (temp < bres->dy)
{
bres->dline += bres->dx;
y += bres->sy;
}
}
}
void draw_point(t_win *win, int x, int y, int colour)
{
if (win->draw_type == PUT)
ft_memcpy(&win->data[(x * 4) + (y * win->size)], &(colour),
(size_t)(sizeof(int)));
if (win->draw_type == DRAW)
{
mlx_pixel_put(win->init, win->win, x, y, colour);
}
}
int choose_colour(int p1, int p2, int max)
{
if (((p1 + p2) / 2) > (max * 0.8))
return (WHITE);
else if (((p1 + p2) / 2) == 0)
return (GREEN);
else if (((p1 + p2) / 2) < 0)
return (BLUE);
else
return (BROWN);
}
/*
** bresenhams line drawing function calc
*/
t_bres *bres_construct(t_point *p1, t_point *p2, int max)
{
t_bres *bres;
bres = (t_bres *)malloc(sizeof(t_bres));
bres->dx = abs(p2->d2x - p1->d2x);
bres->sx = p1->d2x < p2->d2x ? 1 : -1;
bres->dy = abs(p2->d2y - p1->d2y);
bres->sy = p1->d2y < p2->d2y ? 1 : -1;
bres->dline = (bres->dx > bres->dy ? bres->dx : -(bres->dy)) / 2;
p1->colour = choose_colour(p1->d3z, p2->d3z, max);
return (bres);
}