abdelrahman/cg-from-scratch
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add line_t struct and update draw_line function

Browse Source
This commit is contained in:
Abdelrahman Said 2024-06-22 20:41:57 +01:00
parent 5908cf3063
commit 65dcd66f76
2 changed files with 14 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
include/rasteriser/rasteriser.h
View File

@ -4,6 +4,11 @@
#include "vector/vec.h" #include "vector/vec.h"
#include "window/window.h" #include "window/window.h"
void draw_line(window_t *wnd, vec2i_t p0, vec2i_t p1, colour_t colour); typedef struct {
vec2i_t p0;
vec2i_t p1;
} line_t;
void draw_line(window_t *wnd, line_t line, colour_t colour);
#endif // !RASTERISER_H #endif // !RASTERISER_H

15
src/rasteriser/rasteriser.c
View File

@ -1,16 +1,17 @@
#include "rasteriser/rasteriser.h"
#include "c_cpp_aliases/aliases.h" #include "c_cpp_aliases/aliases.h"
#include "vector/vec.h" #include "vector/vec.h"
#include "window/window.h" #include "window/window.h"
void draw_line(window_t *wnd, vec2i_t p0, vec2i_t p1, colour_t colour) { void draw_line(window_t *wnd, line_t line, colour_t colour) {
if (p1.x < p0.x) { if (line.p1.x < line.p0.x) {
vec_swap(vec2i_t, p0, p1); vec_swap(vec2i_t, line.p0, line.p1);
} }
i32 x0 = p0.x; i32 x0 = line.p0.x;
i32 y0 = p0.y; i32 y0 = line.p0.y;
i32 x1 = p1.x; i32 x1 = line.p1.x;
i32 y1 = p1.y; i32 y1 = line.p1.y;
f32 a = ((f32)y1 - y0) / ((f32)x1 - x0); f32 a = ((f32)y1 - y0) / ((f32)x1 - x0);
f32 y = y0; f32 y = y0;