Add line_t struct and update draw_line function

include/misc/misc_utils.h

@@ -0,0 +1,6 @@
+#ifndef MISC_UTILS_H
+#define MISC_UTILS_H
+
+#define ARR_LEN(ARR) sizeof(ARR) / sizeof(ARR[0])
+
+#endif // !MISC_UTILS_H

include/rasteriser/rasteriser.h

@@ -4,6 +4,11 @@
 #include "vector/vec.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

src/rasteriser/main.c

@@ -1,3 +1,4 @@
+#include "misc/misc_utils.h"
 #include "rasteriser/rasteriser.h"
 #include "vector/vec.h"
 #include "window/window.h"
@@ -22,8 +23,22 @@ int main(void) {
   // i32 h_min = ((i32)window.half_height) * -1;
   // i32 h_max = (i32)window.half_height;
 
-  vec2i_t a = {.x = -300, .y = 0};
+  line_t lines[] = {
-  vec2i_t b = {.x = 300, .y = 250};
+      (line_t){
+          (vec2i_t){.x = -300, .y = 0},
+          (vec2i_t){.x = 300, .y = 250},
+      },
+      (line_t){
+          (vec2i_t){.x = -200, .y = -100},
+          (vec2i_t){.x = 240, .y = 120},
+      },
+      (line_t){
+          (vec2i_t){.x = -50, .y = -200},
+          (vec2i_t){.x = 60, .y = 240},
+      },
+  };
+
+  u32 count = ARR_LEN(lines);
 
   while (running) {
     while (SDL_PollEvent(&event)) {
@@ -36,7 +51,9 @@ int main(void) {
 
     clear_window(&window, bg);
 
-    draw_line(&window, a, b, (colour_t){.colour = 0xffffffff});
+    for (u32 i = 0; i < count; ++i) {
+      draw_line(&window, lines[i], (colour_t){.colour = 0xffffffff});
+    }
 
     swap_buffers(&window);
   }

src/rasteriser/rasteriser.c

@@ -1,16 +1,17 @@
+#include "rasteriser/rasteriser.h"
 #include "c_cpp_aliases/aliases.h"
 #include "vector/vec.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 y = y0;

src/scene/scene.c

@@ -1,7 +1,6 @@
 #include "scene/scene.h"
 #include "c_cpp_aliases/aliases.h"
-
+#include "misc/misc_utils.h"
-#define ARR_LEN(ARR) sizeof(ARR) / sizeof(ARR[0])
 
 internal const sphere_t spheres[] = {
     (sphere_t){