Fix Camera2D right and bottom limit to depend on bottom right corner

Author: Alex-Onceanu

scene/2d/camera_2d.cpp

@@ -272,16 +272,17 @@ Transform2D Camera2D::get_camera_transform() {
 	Rect2 screen_rect(-screen_offset + ret_camera_pos, screen_size * zoom_scale);
 
 	if (limit_enabled && (!position_smoothing_enabled || !limit_smoothing_enabled)) {
+		Point2 bottom_right_corner = Point2(screen_rect.position + 2.0 * (camera_pos - screen_rect.position));
 		if (screen_rect.position.x < limit[SIDE_LEFT]) {
 			screen_rect.position.x = limit[SIDE_LEFT];
 		}
 
-		if (screen_rect.position.x + screen_rect.size.x > limit[SIDE_RIGHT]) {
-			screen_rect.position.x = limit[SIDE_RIGHT] - screen_rect.size.x;
+		if (bottom_right_corner.x > limit[SIDE_RIGHT]) {
+			screen_rect.position.x = limit[SIDE_RIGHT] - (bottom_right_corner.x - screen_rect.position.x);
 		}
 
-		if (screen_rect.position.y + screen_rect.size.y > limit[SIDE_BOTTOM]) {
-			screen_rect.position.y = limit[SIDE_BOTTOM] - screen_rect.size.y;
+		if (bottom_right_corner.y > limit[SIDE_BOTTOM]) {
+			screen_rect.position.y = limit[SIDE_BOTTOM] - (bottom_right_corner.y - screen_rect.position.y);
 		}
 
 		if (screen_rect.position.y < limit[SIDE_TOP]) {