| terrain | 用于为此 PaintContext 定义地形空间的地形。 |
| boundsInTerrainSpace | 要在目标地形纹理中编辑的地形空间边界。 |
| inputTextureWidth | Width of the input Terrain Texture for all connected Terrains. |
| inputTextureHeight | Height of the input Terrain Texture for all connected Terrains. |
| extraBorderPixels | Number of extra border pixels required. The default value is 0. |
| sharedBoundaryTexel | Whether to stretch the Textures so that edge texels lie on the Terrain boundary, and are shared with connected Terrains. |
| fillOutsideTerrain | Whether to fill empty space outside of the Terrain tiles with data from the nearest tile. |
构造一个 PaintContext 以用于编辑 boundsInTerrainSpace 和 extraBorderPixels 所定义区域中的地形上的纹理。
This function calculates a pixelRect from boundsInTerrainSpace and extraBorderPixels,
and then constructs a PaintContext from the pixelRect.
This function is called internally by TerrainPaintUtility.BeginPaintHeightmap, TerrainPaintUtility.BeginPaintTexture and TerrainPaintUtility.CollectNormals.
Additional resources: PaintContext.