Version: 2021.2
public void SetAlphamaps (int x, int y, float[,,] map);

描述

在给定贴图区域中分配所有泼溅值。

提供给该函数的数组用于确定 要替换的部分的宽度和高度。数组的第三个维度 对应于泼溅贴图纹理的数量。

using UnityEngine;

public class Example : MonoBehaviour { public Terrain t; // Blend the two terrain textures according to the steepness of // the slope at each point. void Start() { float[,,] map = new float[t.terrainData.alphamapWidth, t.terrainData.alphamapHeight, 2];

// For each point on the alphamap... for (int y = 0; y < t.terrainData.alphamapHeight; y++) { for (int x = 0; x < t.terrainData.alphamapWidth; x++) { // Get the normalized terrain coordinate that // corresponds to the the point. float normX = x * 1.0f / (t.terrainData.alphamapWidth - 1); float normY = y * 1.0f / (t.terrainData.alphamapHeight - 1);

// Get the steepness value at the normalized coordinate. var angle = t.terrainData.GetSteepness(normX, normY);

// Steepness is given as an angle, 0..90 degrees. Divide // by 90 to get an alpha blending value in the range 0..1. var frac = angle / 90.0; map[x, y, 0] = (float)frac; map[x, y, 1] = (float)(1 - frac); } } t.terrainData.SetAlphamaps(0, 0, map); } }