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/*
** line.c for in /home/gayot_o/prog/lib/sdl-digit
**
** Made by olivier gayot
** Login <gayot_o@epitech.net>
**
** Started on Mon Apr 23 08:07:45 2012 olivier gayot
** Last update Mon Apr 23 08:07:45 2012 olivier gayot
*/
#include "sdl_digit.h"
static void perform_draw_line(SDL_Surface *, SDL_Rect, SDL_Rect, t_vect, Uint32);
void draw_line(SDL_Surface *surf, SDL_Rect r1, SDL_Rect r2, Uint32 color) {
t_vect vect;
SDL_Rect begin, end;
if (ABS(r2.x - r1.x) > ABS(r2.y - r1.y)) {
if (r1.x < r2.x) {
begin = r1;
end = r2;
}
else {
begin = r2;
end = r1;
}
vect.x = 1;
vect.y = (float)(end.y - begin.y) / (float)(end.x - begin.x);
}
else {
if (r1.y < r2.y) {
begin = r1;
end = r2;
}
else {
begin = r2;
end = r1;
}
vect.y = 1;
vect.x = (float)(end.x - begin.x) / (float)(end.y - begin.y);
}
perform_draw_line(surf, begin, end, vect, color);
}
static void perform_draw_line(SDL_Surface *surf, SDL_Rect begin,
SDL_Rect end, t_vect vect, Uint32 color) {
float x = (float)begin.x;
float y = (float)begin.y;
while (x != (float)end.x || y != (float)end.y) {
set_pixel_color(surf, (int)x, (int)y, color);
x += vect.x;
y += vect.y;
}
}
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