Fixes 3D axes flickering in the negative direction

When zooming out in the 3d node editor view, the negative half
of all 3d axes starts flickering upon moving the camera. To fix this,
the logic surrounding 3d transform "scaled" and "translated" calls has
been altered so as to account for negative distance values.

Fixes godotengine#89215.

Author: Jabberdrake

editor/plugins/node_3d_editor_plugin.cpp

@@ -6639,8 +6639,13 @@ void fragment() {
 
 			for (int j = 0; j < 4; j++) {
 				Transform3D t = Transform3D();
-				t = t.scaled(axis * distances[j + 1]);
-				t = t.translated(axis * distances[j]);
+				if (distances[j] > 0.0) {
+					t = t.scaled(axis * distances[j + 1]);
+					t = t.translated(axis * distances[j]);
+				} else {
+					t = t.scaled(axis * distances[j]);
+					t = t.translated(axis * distances[j + 1]);
+				}
 				RenderingServer::get_singleton()->multimesh_instance_set_transform(origin_multimesh, i * 4 + j, t);
 				RenderingServer::get_singleton()->multimesh_instance_set_color(origin_multimesh, i * 4 + j, origin_color);
 			}