Draw first triangle

include/rasteriser/rasteriser.h

@@ -13,6 +13,14 @@ typedef struct {
   vec2i_t p1;
 } line_t;
 
+typedef struct {
+  vec2i_t p0;
+  vec2i_t p1;
+  vec2i_t p2;
+} triangle_t;
+
+void draw_wireframe_triangle(window_t *wnd, triangle_t triangle,
+                             colour_t colour);
 void draw_line(window_t *wnd, line_t line, colour_t colour);
 
 #endif // !RASTERISER_H