Map Creation Tools - Nodes Placemant

[amitnos123]

Create a Path3D which places nodes along it

Reference picture from @EODdev vidoe

[amitnos123]

Make a plugin which help move a 3D node to snap to another mesh.
If the 3D node is a Mesh, use the Mesh to generate a collision shape.
Else handle the node as a point.

Use the function MeshInstance3D.create_trimesh_collision() to generate a collision shape for the mesh we want to snap to.

If we want to snap something to the mesh, we check in editor for collision. On collision snap the meshed at collision point.
Another way is to point a raycast from moving node to the mesh we want to snap to. From raycast we calculate the collision point and snap it.

To place a point on a mesh, we do the same logic with pressing a point on the map.
To get the subviewport of 3D editor:
EditorInterface.get_editor_viewport_3d()
From the subviewport, we can get the camera and do the whole calculation of raycast from camera to 3D world.