better struct and files organization, and still only half raycast on map but no view created

srcs/draw/raycast.c

@@ -0,0 +1,19 @@
+#include "cube3d.h"
+
+void	raycast(t_game *game, t_rcast *rcast)
+{
+	t_vec	ray;
+
+	rcast->ray_nb = 0;
+	while (rcast->ray_nb <= SCREEN_DEF)
+	{
+		ray_intersect(game, rcast, &ray);
+
+		// tmp, to draw the map
+			draw_line(game, ray, 0x00FF00FF);
+		// tmp end
+
+		// draw_column();
+		(rcast->ray_nb)++;
+	}
+}