Implement warped mouse panning for 2D & 3D editors

Enabled by default as in Blender, but can be disabled separately for 2D & 3D;
the core functionality is in Input so this could be reused or even exposed to scripts in the future

2 files changed, 12 insertions, 0 deletions

diff --git a/main/input_default.cpp b/main/input_default.cpp
index bc409960d6..8e352ca8e3 100644
--- a/main/input_default.cpp
+++ b/main/input_default.cpp
@@ -478,6 +478,17 @@ void InputDefault::warp_mouse_pos(const Vector2 &p_to) {
 	OS::get_singleton()->warp_mouse_pos(p_to);
 }
 
+Point2i InputDefault::warp_mouse_motion(const InputEventMouseMotion &p_motion, const Rect2 &p_rect) {
+
+	const Point2i rel_warped(Math::fmod(p_motion.relative_x, p_rect.size.x), Math::fmod(p_motion.relative_y, p_rect.size.y));
+	const Point2i pos_local = Point2i(p_motion.global_x, p_motion.global_y) - p_rect.pos;
+	const Point2i pos_warped(Math::fposmod(pos_local.x, p_rect.size.x), Math::fposmod(pos_local.y, p_rect.size.y));
+	if (pos_warped != pos_local) {
+		OS::get_singleton()->warp_mouse_pos(pos_warped + p_rect.pos);
+	}
+	return rel_warped;
+}
+
 void InputDefault::iteration(float p_step) {
 }
 
diff --git a/main/input_default.h b/main/input_default.h
index fecdb215d7..4f298d6d55 100644
--- a/main/input_default.h
+++ b/main/input_default.h
@@ -200,6 +200,7 @@ public:
 	virtual int get_mouse_button_mask() const;
 
 	virtual void warp_mouse_pos(const Vector2 &p_to);
+	virtual Point2i warp_mouse_motion(const InputEventMouseMotion &p_motion, const Rect2 &p_rect);
 
 	virtual void parse_input_event(const InputEvent &p_event);