UnityEngine.TerrainData.SetHeights C# (CSharp) Method

        public void SetHeights(int xBase, int yBase, float[,] heights)
        {
            if (heights == null)
            {
                throw new NullReferenceException();
            }
            if (((((xBase + heights.GetLength(1)) > this.heightmapWidth) || ((xBase + heights.GetLength(1)) < 0)) || (((yBase + heights.GetLength(0)) < 0) || (xBase < 0))) || ((yBase < 0) || ((yBase + heights.GetLength(0)) > this.heightmapHeight)))
            {
                object[] args = new object[] { xBase + heights.GetLength(1), yBase + heights.GetLength(0), this.heightmapWidth, this.heightmapHeight };
                throw new ArgumentException(UnityString.Format("X or Y base out of bounds. Setting up to {0}x{1} while map size is {2}x{3}", args));
            }
            this.Internal_SetHeights(xBase, yBase, heights.GetLength(1), heights.GetLength(0), heights);
        }

	/// <summary>
	/// Creates terrain data from heights.
	/// </summary>
	/// <param name="heightPercents">Terrain height percentages ranging from 0 to 1.</param>
	/// <param name="maxHeight">The maximum height of the terrain, corresponding to a height percentage of 1.</param>
	/// <param name="heightSampleDistance">The horizontal/vertical distance between height samples.</param>
	/// <param name="splatPrototypes">The textures used by the terrain.</param>
	/// <param name="alphaMap">Texture blending information.</param>
	/// <returns>A TerrainData instance.</returns>
	public static TerrainData CreateTerrainData(float[,] heightPercents, float maxHeight, float heightSampleDistance, SplatPrototype[] splatPrototypes, float[,,] alphaMap)
	{
		Debug.Assert((heightPercents.GetLength(0) == heightPercents.GetLength(1)) && (maxHeight >= 0) && (heightSampleDistance >= 0));

		// Create the TerrainData.
		var terrainData = new TerrainData();
		terrainData.heightmapResolution = heightPercents.GetLength(0);

		var terrainWidth = (terrainData.heightmapResolution - 1) * heightSampleDistance;

		// If maxHeight is 0, leave all the heights in terrainData at 0 and make the vertical size of the terrain 1 to ensure valid AABBs.
		if(!Mathf.Approximately(maxHeight, 0))
		{
			terrainData.size = new Vector3(terrainWidth, maxHeight, terrainWidth);

			terrainData.SetHeights(0, 0, heightPercents);
		}
		else
		{
			terrainData.size = new Vector3(terrainWidth, 1, terrainWidth);
		}

		// Texture the terrain.
		if((splatPrototypes != null) && (alphaMap != null))
		{
			Debug.Assert(alphaMap.GetLength(0) == alphaMap.GetLength(1));

			terrainData.alphamapResolution = alphaMap.GetLength(0);
			terrainData.splatPrototypes = splatPrototypes;
			terrainData.SetAlphamaps(0, 0, alphaMap);
		}

		return terrainData;
	}