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Add function to calculate line direction

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Abdelrahman Said 2024-01-24 22:43:55 +00:00
parent 9139dae379
commit 04855478fd
2 changed files with 9 additions and 0 deletions
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2
include/window.h
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@ -69,6 +69,8 @@ void cleanup_window(window *wnd);
void clear_window(const window *wnd, colour colour); void clear_window(const window *wnd, colour colour);
void swap_buffers(const window *wnd); void swap_buffers(const window *wnd);
vec2 line_direction(const line *ln);
void draw_point(const window *wnd, point p, colour colour); void draw_point(const window *wnd, point p, colour colour);
void draw_line(const window *wnd, const line *ln, colour colour); void draw_line(const window *wnd, const line *ln, colour colour);
void draw_triangle(const window *wnd, triangle triangle, colour colour); void draw_triangle(const window *wnd, triangle triangle, colour colour);

7
src/window.c
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@ -72,6 +72,13 @@ void clear_window(const window *wnd, colour colour) {
void swap_buffers(const window *wnd) { SDL_RenderPresent(wnd->renderer); } void swap_buffers(const window *wnd) { SDL_RenderPresent(wnd->renderer); }
vec2 line_direction(const line *ln) {
return (vec2){
.x = ln->p1.x - ln->p0.x,
.y = ln->p1.y - ln->p0.y,
};
}
void draw_point(const window *wnd, point p, colour colour) { void draw_point(const window *wnd, point p, colour colour) {
set_colour(wnd, colour); set_colour(wnd, colour);
SDL_RenderDrawPoint(wnd->renderer, p.x, p.y); SDL_RenderDrawPoint(wnd->renderer, p.x, p.y);