View difference between Paste ID: <a href="/3vGshxMv">3vGshxMv</a> and <a href="/4k3uXtDc">4k3uXtDc</a>

using UnityEngine;
1		using UnityEngine;
2		using System.Collections;
3
4		public class TerrainNoise : MonoBehaviour {
5
6		float waterSmooth = 0;
7		float[,] heights;
8		Terrain terrain;
9		TerrainData data;
10		Transform water;
11		int noiseLayerCount = 20;
12		NoiseLayer[] noiseLayers;
13		float heightBoost = 10;
14		float updateTime;
15		bool dirty = true;
16
17		void OnGUI()
18		{
19		GUILayout.BeginArea( new Rect(20,20,400,400) );
20
21		GUI.color = Color.black;
22
23		GUILayout.Label("WaterSmooth: "+waterSmooth);
24		float newWaterSmooth = GUILayout.HorizontalSlider(waterSmooth, 0f, 1f);
25		if (newWaterSmooth != waterSmooth)
26		{
27		waterSmooth = newWaterSmooth;
28		dirty = true;
29		updateTime = Time.time + 0.5f;
30		}
31
32		GUILayout.Label("HeightBoost: "+heightBoost);
33		float newHeightBoost = GUILayout.HorizontalSlider(heightBoost, 1f, 40f);
34		if (newHeightBoost != heightBoost)
35		{
36		heightBoost = newHeightBoost;
37		dirty = true;
38		updateTime = Time.time + 0.5f;
39		}
40
41		GUILayout.EndArea();
42
43		}
44
45		void Start()
46		{
47
48		terrain = GetComponent<Terrain>();
49		data = terrain.terrainData;
50		heights = new float[ data.heightmapWidth, data.heightmapHeight];
51		water = GameObject.Find ("Water").transform;
52
53
54
55		// create the required number of noise layer definitions
56		noiseLayers = new NoiseLayer[noiseLayerCount];
57		float frequency = .003f;
58		float amplitude = 0.5f;
59		for( int n=0; n<noiseLayers.Length; ++n)
60		{
61		noiseLayers[n] = new NoiseLayer();
62		noiseLayers[n].frequency = frequency;
63		noiseLayers[n].amplitude = amplitude;
64
65		amplitude *= 0.5f;
66		frequency *= 2f;
67
68		}
69
70		}
71
72		// Use this for initialization
73		void Update () {
74
75		if (dirty && Time.time > updateTime)
76		{
77
78		// Generate Heightmap
79
80		float waterHeight = water.position.y / data.size.y;
81
82		for( int x=0; x< data.heightmapWidth; ++x)
83		{
84		for( int z=0; z< data.heightmapHeight; ++z)
85		{
86		// accumulate height values from each perlin noise layer
87		float height = 0;
88		foreach(NoiseLayer noiseLayer in noiseLayers)
89		{
90		float f = noiseLayer.frequency;
91		float a = noiseLayer.amplitude;
92		height += Mathf.PerlinNoise(xf, zf) * a;
93		}
94
95		// smooth heights at water level
96		float waterSmoothedHeight = height - waterHeight;
97		float heightSign = Mathf.Sign(waterSmoothedHeight);
98		waterSmoothedHeight = (waterSmoothedHeight heightSign) * heightBoost;
99		waterSmoothedHeight += waterHeight;
100
101
102		height = Mathf.Lerp( height, waterSmoothedHeight, waterSmooth );
103
104		heights[x,z] = height;
105
106		}
107		}
108
109		data.SetHeights(0, 0, heights);
110
111
112		float waterBlendRange = 25 / data.size.y;
113
114		// Generate Texture mixing map
115
116		float [,,] alphamap = new float[ data.alphamapWidth, data.alphamapHeight, 4];
117
118		for (int x=0; x<data.alphamapWidth; ++x)
119		{
120		for (int z=0; z<data.alphamapWidth; ++z)
121		{
122		// normalize x and z values
123		float nx = x / (float)data.alphamapHeight;
124		float nz = z / (float)data.alphamapWidth;
125
126		Vector4 mix = new Vector4(1,0,0,0);
127
128	-	if (height > waterHeight) {
128	+
129	-	mix = new Vector4(0,1,0,0);
129	+
130
131
132		if (height > waterHeight ) {
133
134		float blend = Mathf.InverseLerp( waterHeight, waterHeight+waterBlendRange, height );
135
136		mix = Vector4.Lerp ( mix, new Vector4(0,1,0,0), blend );
137
138		}
139
140
141
142		alphamap[x,z,0] = mix.x;
143		alphamap[x,z,1] = mix.y;
144		alphamap[x,z,2] = mix.z;
145		alphamap[x,z,3] = mix.w;
146		}
147
148		}
149
150		data.SetAlphamaps( 0, 0, alphamap );
151
152
153		dirty = false;
154		}
155		}
156
157		}
158
159
160		public struct NoiseLayer
161		{
162		public float amplitude;
163		public float frequency;
164
165		}