Fixed another point grabbing issue at lower zoom levels.

This was caused by the fact that the points were being iterated sequentially and we were breaking out of the loop as soon as we found a point that was "close enough", rather than actually finding the closest point. The previous fix exposed this new issue.

editor/plugins/tile_set_editor_plugin.cpp

@@ -1176,6 +1176,31 @@ void TileSetEditor::_on_workspace_overlay_draw() {
 	}
 }
 
+int TileSetEditor::get_grabbed_point(const Vector2 &p_mouse_pos, real_t p_grab_threshold) {
+	Transform2D xform = workspace->get_transform();
+
+	int grabbed_point = -1;
+	real_t min_distance = 1e10;
+
+	for (int i = 0; i < current_shape.size(); i++) {
+		const real_t distance = xform.xform(current_shape[i]).distance_to(xform.xform(p_mouse_pos));
+		if (distance < p_grab_threshold && distance < min_distance) {
+			min_distance = distance;
+			grabbed_point = i;
+		}
+	}
+
+	return grabbed_point;
+}
+
+bool TileSetEditor::is_within_grabbing_distance_of_first_point(const Vector2 &p_pos, real_t p_grab_threshold) {
+	Transform2D xform = workspace->get_transform();
+
+	const real_t distance = xform.xform(current_shape[0]).distance_to(xform.xform(p_pos));
+
+	return distance < p_grab_threshold;
+}
+
 void TileSetEditor::_on_workspace_input(const Ref<InputEvent> &p_ie) {
 
 	if (tileset.is_null() || !get_current_texture().is_valid())
@@ -1528,20 +1553,19 @@ void TileSetEditor::_on_workspace_input(const Ref<InputEvent> &p_ie) {
 						shape_anchor.x *= (size.x + spacing);
 						shape_anchor.y *= (size.y + spacing);
 					}
+
 					const real_t grab_threshold = EDITOR_GET("editors/poly_editor/point_grab_radius");
-					Transform2D xform = workspace->get_transform();
 					shape_anchor += current_tile_region.position;
 					if (tools[TOOL_SELECT]->is_pressed()) {
 						if (mb.is_valid()) {
 							if (mb->is_pressed() && mb->get_button_index() == BUTTON_LEFT) {
 								if (edit_mode != EDITMODE_PRIORITY && current_shape.size() > 0) {
-									for (int i = 0; i < current_shape.size(); i++) {
-										const real_t distance = xform.xform(current_shape[i]).distance_to(xform.xform(mb->get_position()));
-										if (distance < grab_threshold) {
-											dragging_point = i;
-											workspace->update();
-											return;
-										}
+									int grabbed_point = get_grabbed_point(mb->get_position(), grab_threshold);
+
+									if (grabbed_point >= 0) {
+										dragging_point = grabbed_point;
+										workspace->update();
+										return;
 									}
 								}
 								if ((tileset->tile_get_tile_mode(get_current_tile()) == TileSet::AUTO_TILE || tileset->tile_get_tile_mode(get_current_tile()) == TileSet::ATLAS_TILE) && current_tile_region.has_point(mb->get_position())) {
@@ -1635,14 +1659,12 @@ void TileSetEditor::_on_workspace_input(const Ref<InputEvent> &p_ie) {
 								Vector2 pos = mb->get_position();
 								pos = snap_point(pos);
 								if (creating_shape) {
-									if (current_shape.size() > 0) {
-										const real_t distance = xform.xform(current_shape[0]).distance_to(xform.xform(pos));
-										if (distance <= grab_threshold) {
-											if (current_shape.size() > 2) {
-												close_shape(shape_anchor);
-												workspace->update();
-												return;
-											}
+									if (current_shape.size() > 2) {
+
+										if (is_within_grabbing_distance_of_first_point(mb->get_position(), grab_threshold)) {
+											close_shape(shape_anchor);
+											workspace->update();
+											return;
 										}
 									}
 									current_shape.push_back(pos);
@@ -1688,13 +1710,15 @@ void TileSetEditor::_on_workspace_input(const Ref<InputEvent> &p_ie) {
 								}
 							} else if (!mb->is_pressed() && mb->get_button_index() == BUTTON_LEFT) {
 								if (creating_shape) {
-									const real_t distance = xform.xform(current_shape[0]).distance_to(xform.xform(current_shape[1]));
-									if (distance <= grab_threshold) {
+
+									// if the first two corners are within grabbing distance of one another, expand the rect to fill the tile
+									if (is_within_grabbing_distance_of_first_point(current_shape[1], grab_threshold)) {
 										current_shape.set(0, snap_point(shape_anchor));
 										current_shape.set(1, snap_point(shape_anchor + Vector2(current_tile_region.size.x, 0)));
 										current_shape.set(2, snap_point(shape_anchor + current_tile_region.size));
 										current_shape.set(3, snap_point(shape_anchor + Vector2(0, current_tile_region.size.y)));
 									}
+
 									close_shape(shape_anchor);
 									workspace->update();
 									return;

editor/plugins/tile_set_editor_plugin.h

@@ -244,6 +244,8 @@ private:
 	void update_workspace_tile_mode();
 	void update_workspace_minsize();
 	void update_edited_region(const Vector2 &end_point);
+	int get_grabbed_point(const Vector2 &p_mouse_pos, real_t grab_threshold);
+	bool is_within_grabbing_distance_of_first_point(const Vector2 &p_pos, real_t p_grab_threshold);
 
 	int get_current_tile() const;
 	void set_current_tile(int p_id);