feat(maps): Geometry Heightmap Exporter

[Violevo]

Adds a Geometry Heightmap exporter to the Map view. The exporter collects selected world partition geometry, attempts to remove non-collision objects, then rasterizes it into a top-down 16-bit PNG heightmap. Includes optional terrain-bounds clipping, Spawn Island inclusion, terrain-only heightmap export, and a debug report output. Exported resolution options from 512 to 32768

Export Usage

• Select the intended grid cells for the export.
• Enable Inlude Main Level AFTER selecing the grid cells.
• Keep Actors, Instanced & Foliage Actors, and Landscape enabled, with HLODs disabled.
• Configure Bounds, Spawn, Terrain, and Report, then hit Generate.
• The resultant image will be generated, saved, and revealed in the your file explorer.

Options

• Bounds clips all geometry in the heightmap to the terrain bounds, preventing far away meshses from drastically zooming out the heightmap.
• Spawn includes detected Spawn Island packages and disables any crop-to-main-island functions. Enabled = include spawn island, Disabled = no spawn island
• Terrain writes terrainmap.png alongside the heightmap to the export folder. The terrainmap doesent get populated with buildings,trees,etc - so only represents terrain.
• Report writes heightmap-report.json with generation settings, filtered mesh counts, skipped mesh counts, warnings, etc to the export folder, used for debugging.

[Violevo]

Example exporter usage (still some bugs with certain meshes)

test.mp4

Parts of the video are sped up 16x to make the video shorter, the real export time was around 5 mins

[h4lfheart]

Been super busy recently, will get the chance to look at this soon hopefully.

[f4r3s309]

Same