| public GetValue ( float x, float y, float z ) : float | ||
| x | float | The input coordinate on the x-axis. |
| y | float | The input coordinate on the y-axis. |
| z | float | The input coordinate on the z-axis. |
| return | float | |
// Use this for initialization
void Start ()
{
Debug.Log("Tutorial conversion for http://libnoise.sourceforge.net/tutorials/tutorial2.html");
var perlin = new Perlin();
Debug.Log(string.Format("First value: {0}", perlin.GetValue(_firstValue)));
Debug.Log(string.Format("First value, displaced: {0}", perlin.GetValue(_firstValue + _displacement)));
Debug.Log(string.Format("Second value: {0}", perlin.GetValue(_secondValue)));
}
//通过方块的世界坐标获取它的方块类型
public static byte GetTerrainBlock(Vector3i worldPosition)
{
//LibNoise噪音对象
Perlin noise = new LibNoise.Generator.Perlin(1f, 1f, 1f, 8, SeedManager.randomSeed, QualityMode.High);
//为随机数指定种子，这样每次随机的都是同样的值
Random.InitState(SeedManager.randomSeed);
//因为柏林噪音在(0,0)点是上下左右对称的，所以我们设置一个很远很远的地方作为新的(0,0)点
Vector3 offset = new Vector3(Random.value * 100000, Random.value * 100000, Random.value * 100000);
float noiseX = Mathf.Abs((worldPosition.x + offset.x) / 20);
float noiseY = Mathf.Abs((worldPosition.y + offset.y) / 20);
float noiseZ = Mathf.Abs((worldPosition.z + offset.z) / 20);
double noiseValue = noise.GetValue(noiseX, noiseY, noiseZ);
noiseValue += (20 - worldPosition.y) / 15f;
noiseValue /= worldPosition.y / 5f;
if (noiseValue > 0.5f)
{
return(1);
}
return(0);
}
//通过世界坐标获取他方块的类型
public static byte GetTerrainBlock(Vector3i worldPosition)
{
//libNooise噪音对象
Perlin noise = new LibNoise.Generator.Perlin(1f, 1f, 1f, 8, GameManager.randomSeed, QualityMode.High);
//为随机数指定种子，每次随机都为同样值
Random.InitState(GameManager.randomSeed);
//因为柏林噪音在(0,0)点是上下左右对称的，所以我们设置一个很远很远的地方作为新的(0,0)点
Vector3 offset = new Vector3(Random.value * 100000, Random.value * 100000, Random.value * 100000);
float noiseX = Mathf.Abs((worldPosition.x + offset.x) / 20); //改变地形的平缓程度，值越大越平缓
float noiseY = Mathf.Abs((worldPosition.y + offset.y) / 20); //不要小于20
float noiseZ = Mathf.Abs((worldPosition.z + offset.z) / 20);
double noiseValue = noise.GetValue(noiseX, noiseY, noiseZ);
//没有此两行就为洞窟地貌
noiseValue += (20 - worldPosition.y) / 15f;//30改变修正山高度，也可以为将整体噪音图像向上平移
noiseValue /= worldPosition.y / 5f;
if (noiseValue > 0.5f)
{
return(1);
}
return(0);
}
private float noise(Vector3 point, int octaves,
float lucanarity = 2.0f, float gain = 0.5f, float warp = 0.25f)
{
float sum = 0.0f, freq = 1.0f, amp = 1.0f;
for (int o = 0; o < octaves; o++)
{
sum += amp * (float)planes.GetValue(point);
freq *= lucanarity;
amp *= gain;
}
sum *= (float)mountains.GetValue(point * freq) * warp * octaves;
return(sum);
}
//Copied
public Vector2 PerlinNoise3D(Transform tr, float radius, float scaler, int octaves = 2, float lucanarity = 2f, float gain = 0.1f, float warp = 0.1f, float testing = 10)
{
LibNoise.Generator.Perlin planes = GameObject.FindGameObjectWithTag("Setting").GetComponent <TestongThings>().planes;
LibNoise.Generator.RidgedMultifractal mountains = GameObject.FindGameObjectWithTag("Setting").GetComponent <TestongThings>().mountains;
float highest = 0;
float lowest = 0;
for (var i = 0; i < vertices.Length; i++)
{
Vector3 point = tr.TransformPoint(vertices[i]);
//Vector3 point = vertices[i];
float sum = 0.0f, freq = 1.0f, amp = 1.0f;
for (int j = 0; j < octaves; j++)
{
sum += amp * (float)planes.GetValue(point);
freq *= lucanarity;
amp *= gain;
}
sum *= (float)mountains.GetValue(point * freq) * octaves * testing;
sum = Mathf.Max(-1, sum / 2);
vertices[i] = vertices[i].normalized * (radius * scaler + sum);
if (sum > highest)
{
highest = sum;
}
if (sum < lowest && sum > 0)
{
lowest = sum;
}
}
return(new Vector2(lowest, highest));
}
public void setColor(int index, Color32 color)
{
Polygon poly = GetPolygon(index);
if (poly != null)
{
#region Set Selection Color
Mesh m_Mesh = m_PlanetMesh.GetComponent <MeshFilter>().mesh;
Color32[] colors = m_Mesh.colors32;
if (s_Polygon != null)
{
int j = 0;
foreach (int ind in s_Polygon.indices)
{
colors[ind + 0] = s_Color32[j++];
colors[ind + 1] = s_Color32[j++];
colors[ind + 2] = s_Color32[j++];
}
}
s_Color32 = new List <Color32>();
foreach (int ind in poly.indices)
{
s_Color32.Add(colors[ind + 0]);
s_Color32.Add(colors[ind + 1]);
s_Color32.Add(colors[ind + 2]);
colors[ind + 0] = color;
colors[ind + 1] = color;
colors[ind + 2] = color;
}
s_Polygon = poly;
m_PlanetMesh.GetComponent <MeshFilter>().mesh.colors32 = colors;
#endregion
#region Set Display Area (If Exists)
if (s_Display != null)
{
Mesh mesh = m_PlanetMesh.GetComponent <MeshFilter>().mesh;
Texture2D texture = new Texture2D(s_MapResolution, s_MapResolution);
Vector3 f = mesh.vertices[poly.t_Vertices[3]] - mesh.vertices[poly.t_Vertices[2]];
Vector3 g = mesh.vertices[poly.t_Vertices[3]] - mesh.vertices[poly.t_Vertices[0]];
Vector3 P = mesh.vertices[poly.t_Vertices[3]];
Vector3 Q = mesh.vertices[poly.t_Vertices[0]];
Vector3 R = mesh.vertices[poly.t_Vertices[2]];
Vector3 p = new Vector3(0, 0, 0);
float stepX = FindStep(mesh.vertices[poly.t_Vertices[3]].x, mesh.vertices[poly.t_Vertices[2]].x);
float stepY = FindStep(mesh.vertices[poly.t_Vertices[3]].y, mesh.vertices[poly.t_Vertices[0]].y);
float denom = (f.x * g.y) - (f.y * g.x);
float alpha = ((p.x * g.y) - (p.y * g.x)) / denom;
float beta = ((p.y * g.x) - (p.x * g.y)) / denom;
Vector3 stepVector = new Vector3(stepX, stepY, 0);
float stepAlpha = ((stepVector.x * g.y) - (stepVector.y * g.x)) / denom;
float stepBeta = ((stepVector.y * g.x) - (stepVector.x * g.y)) / denom;
float goalAlpha = ((R.x * g.y) - (R.y * g.x)) / denom;
float goalBeta = ((Q.x * g.y) - (Q.y * g.x)) / denom;
float currAlpha = alpha;
for (int y = 0; y < texture.width; y++)
{
for (int x = 0; x < texture.height; x++)
{
Vector3 P_prime = (currAlpha * f) + (beta * g) + P;
double value = Mathf.Abs((float)Perlin.GetValue(P_prime.x, P_prime.y, P_prime.z));
Color32 polyColor = p_TerrainType[p_TerrainType.Count - 1];
for (int range = 0; range < p_TerrainHeight.Count; range++)
{
if (value <= p_TerrainHeight[range])
{
polyColor = p_TerrainType[range];
break;
}
}
texture.SetPixel(x, y, polyColor);
currAlpha += stepAlpha;
}
beta += stepBeta;
currAlpha = alpha;
}
s_Display.GetComponent <Renderer>().material.mainTexture = texture;
texture.Apply();
}
#endregion
}
}
/// <summary>
/// Returns the output value for the given input coordinates.
/// </summary>
/// <param name="x">The input coordinate on the x-axis.</param>
/// <param name="y">The input coordinate on the y-axis.</param>
/// <param name="z">The input coordinate on the z-axis.</param>
/// <returns>The resulting output value.</returns>
public override double GetValue(double x, double y, double z)
{
float signal;
float value;
int curOctave;
x *= Frequency;
y *= Frequency;
z *= Frequency;
// Initialize value, fBM starts with 0
value = 0;
ModuleBase tmpperl = new Perlin(Frequency,Lacunarity,0.5,OctaveCount,Seed,QualityMode.Medium);
// Inner loop of spectral construction, where the fractal is built
for(curOctave = 0; curOctave < OctaveCount; curOctave++) {
// Get the coherent-noise value.
signal = (float)tmpperl.GetValue(x, y, z) * (float)m_weights[curOctave];
// Add the signal to the output value.
value += signal;
// Go to the next octave.
x *= Lacunarity;
y *= Lacunarity;
z *= Lacunarity;
}//end for
//take care of remainder in _octaveCount
float remainder = OctaveCount - (int)OctaveCount;
if(remainder > 0.0f) {
value += remainder * (float)tmpperl.GetValue(x, y, z) * (float)m_weights[curOctave];
}//end if
return value;
}
private static float getAxis(LibNoise.Generator.Perlin perlin)
{
return((float)perlin.GetValue(0, 0, 1) * 10);
}
private static GameObject CreateGameObject(Primitive primitive, LibNoise.Generator.Perlin perlin)
{
#region Create Planet Object
GameObject planet = new GameObject("Planet");
planet.AddComponent <Planet>();
planet.GetComponent <Planet>().m_Polygons = primitive.m_Polygons;
planet.GetComponent <Planet>().Perlin = perlin;
MeshCollider meshCollider = planet.AddComponent <MeshCollider>();
MeshFilter meshFilter = planet.AddComponent <MeshFilter>();
MeshRenderer meshRenderer = planet.AddComponent <MeshRenderer>();
meshRenderer.material = new Material(Shader.Find("Particles/Standard Surface"));
#endregion
#region Generate Terrain
List <float> p_TerrainHeight = new List <float>();
List <Color32> p_TerrainType = new List <Color32>();
GenerateTerrain(p_TerrainHeight, p_TerrainType);
planet.GetComponent <Planet>().p_TerrainHeight = p_TerrainHeight;
planet.GetComponent <Planet>().p_TerrainType = p_TerrainType;
#endregion
#region Local Variables
int vertexCount = (primitive.m_Polygons[0].type == 0) ? primitive.m_Polygons.Count * 6 : primitive.m_Polygons.Count * 3;
int[] indices = new int[vertexCount];
Vector3[] vertices = new Vector3[vertexCount];
Color32[] colors = new Color32[vertexCount];
#endregion
#region Create Mesh Data
for (int i = 0; i < primitive.m_Polygons.Count; i++)
{
#region Get/Set Polygon Data
var poly = primitive.m_Polygons[i];
int index = i;
if (poly.type == 0)
{
index = index * 6;
primitive.m_Polygons[i].indices.Add(index);
primitive.m_Polygons[i].indices.Add(index + 3);
primitive.m_Polygons[i].t_Vertices.Add(index + 0);
primitive.m_Polygons[i].t_Vertices.Add(index + 2);
primitive.m_Polygons[i].t_Vertices.Add(index + 1);
primitive.m_Polygons[i].t_Vertices.Add(index + 4);
}
else
{
index = index * 3;
primitive.m_Polygons[i].indices.Add(index);
primitive.m_Polygons[i].t_Vertices.Add(index + 0);
primitive.m_Polygons[i].t_Vertices.Add(index + 2);
primitive.m_Polygons[i].t_Vertices.Add(index + 1);
}
#endregion
#region Set Mesh Indices
indices[index + 0] = index + 0;
indices[index + 1] = index + 1;
indices[index + 2] = index + 2;
if (poly.type == 0)
{
indices[index + 3] = index + 3;
indices[index + 4] = index + 4;
indices[index + 5] = index + 5;
}
#endregion
#region Set Mesh Vertices
vertices[index + 0] = primitive.m_Vertices[poly.m_Vertices[0]];
vertices[index + 1] = primitive.m_Vertices[poly.m_Vertices[2]];
vertices[index + 2] = primitive.m_Vertices[poly.m_Vertices[1]];
if (poly.type == 0)
{
vertices[index + 3] = primitive.m_Vertices[poly.m_Vertices[0]];
vertices[index + 4] = primitive.m_Vertices[poly.m_Vertices[3]];
vertices[index + 5] = primitive.m_Vertices[poly.m_Vertices[2]];
}
#endregion
#region Get Polgon Color (Legacy)
/*
* double value0 = Mathf.Abs((float)perlin.GetValue(vertices[index].x, vertices[index].y, vertices[index].z));
* double value1 = Mathf.Abs((float)perlin.GetValue(vertices[index + 1].x, vertices[index + 1].y, vertices[index + 1].z));
* double value2 = Mathf.Abs((float)perlin.GetValue(vertices[index + 2].x, vertices[index + 2].y, vertices[index + 2].z));
* double value3 = Mathf.Abs((float)perlin.GetValue(vertices[index + 3].x, vertices[index + 3].y, vertices[index + 3].z));
* double value = (value1 + value2 + value3 + value0) / 4;
* Color32 polyColor = p_TerrainType[p_TerrainType.Count - 1];
* for (int range = 0; range < p_TerrainHeight.Count; range++)
* {
* if (value <= p_TerrainHeight[range])
* {
* polyColor = p_TerrainType[range];
* break;
* }
* }
*/
#endregion
#region Set Colors (Legacy)
/*
* colors[index] = polyColor;
* colors[index + 1] = polyColor;
* colors[index + 2] = polyColor;
*
* if (poly.type == 0)
* {
* colors[index + 3] = polyColor;
* colors[index + 4] = polyColor;
* colors[index + 5] = polyColor;
* }
*/
#endregion
#region Set Color
int j_max = (primitive.m_Polygons[i].type == 0) ? 6 : 4;
for (int j = 0; j < j_max; j++)
{
double value = Mathf.Abs((float)perlin.GetValue(vertices[index + j].x, vertices[index + j].y, vertices[index + j].z));
colors[index + j] = p_TerrainType[p_TerrainType.Count - 1];
for (int range = 0; range < p_TerrainHeight.Count; range++)
{
if (value <= p_TerrainHeight[range])
{
colors[index + j] = p_TerrainType[range];
break;
}
}
}
#endregion
}
#endregion
#region Create Mesh
Mesh mesh = new Mesh();
mesh.vertices = vertices;
mesh.colors32 = colors;
mesh.SetTriangles(indices, 0);
meshFilter.mesh = mesh;
meshFilter.mesh.RecalculateNormals();
meshCollider.sharedMesh = mesh;
#endregion
return(planet);
}
/// <summary>
/// Returns the output value for the given input coordinates.
/// </summary>
/// <param name="x">The input coordinate on the x-axis.</param>
/// <param name="y">The input coordinate on the y-axis.</param>
/// <param name="z">The input coordinate on the z-axis.</param>
/// <returns>The resulting output value.</returns>
public override double GetValue(double x, double y, double z)
{
float signal;
float value;
int curOctave;
ModuleBase tmpperl = new Perlin(Frequency,Lacunarity,0.5,OctaveCount,Seed,QualityMode.Medium);
x *= this.m_frequency;
y *= this.m_frequency;
z *= this.m_frequency;
// Initialize value : first unscaled octave of function; later octaves are scaled
value = (float)m_offset + (float)tmpperl.GetValue(x, y, z);
x *= this.m_lacunarity;
y *= this.m_lacunarity;
z *= this.m_lacunarity;
// inner loop of spectral construction, where the fractal is built
for(curOctave = 1; curOctave < m_octaveCount; curOctave++) {
// obtain displaced noise value.
signal = (float)m_offset + (float)Utils.GradientCoherentNoise3D(x, y, z, m_seed, this.m_quality);;
//scale amplitude appropriately for this frequency
signal *= (float)m_weights[curOctave];
// scale increment by current altitude of function
signal *= value;
// Add the signal to the output value.
value += signal;
// Go to the next octave.
x *= m_lacunarity;
y *= m_lacunarity;
z *= m_lacunarity;
}//end for
//take care of remainder in _octaveCount
float remainder = m_octaveCount - (int)m_octaveCount;
if(remainder > 0.0f) {
signal = (float)m_offset + (float)tmpperl.GetValue(x, y, z);
signal *= (float)m_weights[curOctave];
signal *= value;
signal *= remainder;
value += signal;
}//end if
return value;
}
/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="z"></param>
/// <returns></returns>
public override float GetValue(float x, float z)
{
return((float)(perlinNoiseGenerator.GetValue(x, 0, z) / 2f) + 0.5f);
}