OpenMW-CS: Region Map - creating and editing exterior cells

Cells are basic world building units in OpenMW and they come in two types – exterior and interior. Exterior cells represent continuous terrain and fit on a world grid at specific coordinates.

Current workflow for creating exterior cells is less than optimal. They are created one at a time in the Cells list and by manually typing the coordinates. There are two problems with this:

• Creating the cells one by one is time consuming.
• The coordinates don’t offer a visual idea where in the world the newly created cells are.

This issue proposes the Region Map gets extra functionality to solve these problems:

• Video: https://www.youtube.com/watch?v=kH7PHs6S2v0
• Create and modify cells
• Assign regions
• Offer a preexisting grid on which the cells can be created
• Outline the game-world that exists from the cells
• Pan the view without using the scroll bars
• Double click to select all cells of the same region
• Show grid coordinates

Concept (a bit different colours than the video but the same design)

Nice to haves, but go beyond this issue:

• Show terrain height in Region Map
• Create new regions, their names and colors from the Region Map
• Apply a grayscale image to modify terrain height of selected cells
• Focus the 3d view camera to the cell currently selected in the region Map view.