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Unity Engine

BeginPaintTexture(Terrain, Rect, TerrainLayer, int, bool)

Helper function to set up a PaintContext for modifying the alphamap of one or more Terrain tiles.
Read time 1 minuteLast updated 12 days ago

Definition

public static PaintContext BeginPaintTexture(Terrain terrain, Rect boundsInTerrainSpace, TerrainLayer inputLayer, int extraBorderPixels = 0, bool fillOutsideTerrain = true)

Parameters

terrain

Terrain
Reference Terrain tile.

boundsInTerrainSpace

Rect
The region in terrain space to edit.

inputLayer

TerrainLayer
Selects the alphamap to paint.

extraBorderPixels

int
Number of extra border pixels required.

fillOutsideTerrain

bool
Whether to fill empty space outside of Terrain tiles with data from the nearest tile.

Returns

Type

Description

PaintContextPaintContext containing the combined alphamap data for the specified region.

Remarks

BeginPaintTexture identifies all of the alphamap pixels that are within 
extraBorderPixels
of the bounds rectangle. The search is performed across adjacent connected Terrain tiles. The pixels are collected into a temporary render texture and stored in _sourceRenderTexture.
After calling this function, you may modify the alphamap by writing the new values into _destinationRenderTexture. Then, you may complete the modification by calling TerrainPaintUtility.EndPaintTexture to copy the modified data back to the Terrain tiles. Alteratively, you may cancel the modification by calling TerrainPaintUtility.ReleaseContextResources to release the RenderTexture resources.
Additional Resources: TerrainPaintUtility.EndPaintTexture, PaintContext