diff --git a/include/rasteriser/rasteriser.h b/include/rasteriser/rasteriser.h
new file mode 100644
index 0000000..7c6a071
--- /dev/null
+++ b/include/rasteriser/rasteriser.h
@@ -0,0 +1,9 @@
+#ifndef RASTERISER_H
+#define RASTERISER_H
+
+#include "vector/vec.h"
+#include "window/window.h"
+
+void draw_line(window_t *wnd, vec2i_t p0, vec2i_t p1, colour_t colour);
+
+#endif // !RASTERISER_H
diff --git a/src/rasteriser/main.c b/src/rasteriser/main.c
index 11ffbed..ccccd5b 100644
--- a/src/rasteriser/main.c
+++ b/src/rasteriser/main.c
@@ -1,7 +1,47 @@
-#include <stdio.h>
+#include "rasteriser/rasteriser.h"
+#include "vector/vec.h"
+#include "window/window.h"
+#include <SDL2/SDL_events.h>
+#include <SDL2/SDL_keycode.h>
 #include <stdlib.h>
 
 int main(void) {
-  printf("RASTERISER\n");
+  colour_t bg =
+      (colour_t){.rgba.r = 27, .rgba.g = 38, .rgba.b = 79, .rgba.a = 255};
+  window_t window = {0};
+
+  if (!init_window(&window, 800, 800, "CG From Scratch Rasteriser")) {
+    return EXIT_FAILURE;
+  }
+
+  bool running = true;
+  SDL_Event event = {0};
+
+  // i32 w_min = ((i32)window.half_width) * -1;
+  // i32 w_max = (i32)window.half_width;
+  // i32 h_min = ((i32)window.half_height) * -1;
+  // i32 h_max = (i32)window.half_height;
+
+  vec2i_t a = {.x = -300, .y = 0};
+  vec2i_t b = {.x = 300, .y = 250};
+
+  while (running) {
+    while (SDL_PollEvent(&event)) {
+      switch (event.type) {
+      case SDL_QUIT:
+        running = false;
+        break;
+      }
+    }
+
+    clear_window(&window, bg);
+
+    draw_line(&window, a, b, (colour_t){.colour = 0xffffffff});
+
+    swap_buffers(&window);
+  }
+
+  close_window(&window);
+
   return EXIT_SUCCESS;
 }
diff --git a/src/rasteriser/rasteriser.c b/src/rasteriser/rasteriser.c
new file mode 100644
index 0000000..acfe74b
--- /dev/null
+++ b/src/rasteriser/rasteriser.c
@@ -0,0 +1,22 @@
+#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) {
+  if (p1.x < p0.x) {
+    vec_swap(vec2i_t, p0, p1);
+  }
+
+  i32 x0 = p0.x;
+  i32 y0 = p0.y;
+  i32 x1 = p1.x;
+  i32 y1 = p1.y;
+
+  f32 a = ((f32)y1 - y0) / ((f32)x1 - x0);
+  f32 y = y0;
+
+  for (i32 x = x0; x <= x1; ++x) {
+    set_pixel(wnd, x, (i32)y, colour);
+    y += a;
+  }
+}