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draw_lines2.c
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draw_lines2.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* draw_lines2.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: toramo <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/12/18 10:05:00 by toramo #+# #+# */
/* Updated: 2023/12/18 10:05:01 by toramo ### ########.fr */
/* */
/* ************************************************************************** */
#include "include/fdf.h"
float ft_abs_float(float x)
{
if (x < 0)
return (-1.0 * x);
else
return (x);
}
int inter_color(t_vertex va, t_vertex vb, t_fdf *t)
{
int red;
int green;
int blue;
float p;
if (ft_abs(t->dx) >= ft_abs(t->dy))
p = ft_abs_float((t->x - va.x) / (vb.x - va.x));
else
p = ft_abs_float((t->y - va.y) / (vb.y - va.y));
red = get_r(vb.color) * p + get_r(va.color) * (1 - p);
green = get_g(vb.color) * p + get_g(va.color) * (1 - p);
blue = get_b(vb.color) * p + get_b(va.color) * (1 - p);
return (get_rgba(red, green, blue, 255));
}
void dda(t_vertex v1, t_vertex v2, t_fdf *t)
{
float step;
int i;
t->dx = v2.x - v1.x;
t->dy = v2.y - v1.y;
if (ft_abs(t->dx) >= ft_abs(t->dy))
step = ft_abs(t->dx);
else
step = ft_abs(t->dy);
t->dx = t->dx / step;
t->dy = t->dy / step;
t->x = v1.x;
t->y = v1.y;
i = 0;
while (i <= step)
{
if (pixel_is_valid(round(t->x), round(t->y)))
mlx_put_pixel(t->img, round(t->x), round(t->y),
inter_color(v1, v2, t));
t->x = t->x + t->dx;
t->y = t->y + t->dy;
i++;
}
}