protected override bool CalculateVoxel(Voxel voxel, int x, int y, int z)
{
float noiseValue = fractalNoise.Sample3D(offset.x + x / (float)width, y / (float)height, offset.y + z / (float)length);
voxel.Data = noiseValue;
return(true);
}
/*public override void NodeGUI ()
* {
* GUILayout.BeginHorizontal();
* GUILayout.BeginVertical();
* xConnection.DisplayLayout ();
* yConnection.DisplayLayout ();
* zConnection.DisplayLayout ();
* GUILayout.EndVertical();
* outputConnection.DisplayLayout();
* GUILayout.EndHorizontal ();
* }*/
public override bool Calculate()
{
float x = xConnection.GetValue <float>();
float y = yConnection.GetValue <float>();
float z = zConnection.GetValue <float>();
float noiseValue = fractal.Sample3D(x, y, z);
outputConnection.SetValue <float>(noiseValue);
return(true);
}
private float[] GenerateFractalVoxels(int width, int height, int length)
{
INoise perlin = new PerlinNoise(seed, 2.0f);
FractalNoise fractal = new FractalNoise(perlin, 3, .5f);
float[] voxels = new float[width * height * length];
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
for (int z = 0; z < length; z++)
{
float fx = x / (width - 1f);
float fy = y / (height - 1f);
float fz = z / (length - 1f);
int idx = x + y * width + z * width * height;
voxels[idx] = fractal.Sample3D(fx, fy, fz);
}
}
}
return(voxels);
}
void Start()
{
INoise perlin = new PerlinNoise(seed, 2.0f);
FractalNoise fractal = new FractalNoise(perlin, 3, 1.0f);
//Set the mode used to create the mesh.
//Cubes is faster and creates less verts, tetrahedrons is slower and creates more verts but better represents the mesh surface.
Marching marching = null;
if (mode == MARCHING_MODE.TETRAHEDRON)
{
marching = new MarchingTertrahedron();
}
else
{
marching = new MarchingCubes();
}
//Surface is the value that represents the surface of mesh
//For example the perlin noise has a range of -1 to 1 so the mid point is where we want the surface to cut through.
//The target value does not have to be the mid point it can be any value with in the range.
marching.Surface = 0.0f;
//The size of voxel array.
int width = 32;
int height = 32;
int length = 10;
float[] voxels = new float[width * height * length];
//Fill voxels with values. Im using perlin noise but any method to create voxels will work.
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
for (int z = 0; z < length; z++)
{
float fx = x / (width - 1.0f);
float fy = y / (height - 1.0f);
float fz = z / (length - 1.0f);
int idx = x + y * width + z * width * height;
voxels[idx] = fractal.Sample3D(fx, fy, fz);
}
}
}
List <Vector3> verts = new List <Vector3>();
List <int> indices = new List <int>();
//The mesh produced is not optimal. There is one vert for each index.
//Would need to weld vertices for better quality mesh.
marching.Generate(voxels, width, height, length, verts, indices);
//A mesh in unity can only be made up of 65000 verts.
//Need to split the verts between multiple meshes.
int maxVertsPerMesh = 30000; //must be divisible by 3, ie 3 verts == 1 triangle
int numMeshes = verts.Count / maxVertsPerMesh + 1;
for (int i = 0; i < numMeshes; i++)
{
List <Vector3> splitVerts = new List <Vector3>();
List <int> splitIndices = new List <int>();
for (int j = 0; j < maxVertsPerMesh; j++)
{
int idx = i * maxVertsPerMesh + j;
if (idx < verts.Count)
{
splitVerts.Add(verts[idx]);
splitIndices.Add(j);
}
}
if (splitVerts.Count == 0)
{
continue;
}
Mesh mesh = new Mesh();
mesh.SetVertices(splitVerts);
mesh.SetTriangles(splitIndices, 0);
mesh.RecalculateBounds();
mesh.RecalculateNormals();
GameObject go = new GameObject("Mesh");
go.transform.parent = transform;
go.AddComponent <MeshFilter>();
go.AddComponent <MeshRenderer>();
go.GetComponent <Renderer>().material = m_material;
go.GetComponent <MeshFilter>().mesh = mesh;
go.transform.localPosition = new Vector3(-width / 2, -height / 2, -length / 2);
meshes.Add(go);
}
}
public void InitialiseVoxels()
{
if (RockNoiseLayer)
{
RockNoiseLayer.Initialise();
}
if (DirtNoiseLayer)
{
DirtNoiseLayer.Initialise();
}
INoise noise = GetNoise(m_noiseType, 0, m_frequency, m_amplitude);
FractalNoise fractalNoise = new FractalNoise(noise, m_octaves, m_frequency, m_amplitude);
for (int x = 0; x < chunkSizeXZ; x++)
{
for (int z = 0; z < chunkSizeXZ; z++)
{
float bedrockHeight = 2;
float rockHeight = 0;
float dirtHeight = 0;
//float sandHeight = 12;
if (RockNoiseLayer)
{
rockHeight += RockNoiseLayer.SampleValue(
x / (float)(m_worldResolution - 1),
z / (float)(m_worldResolution - 1)
);
}
if (DirtNoiseLayer)
{
dirtHeight += DirtNoiseLayer.SampleValue(
x / (float)(m_worldResolution - 1),
z / (float)(m_worldResolution - 1)
);
}
for (int y = 0; y < chunkHeight; y++)
{
Voxel v = voxelGrid[x, y, z];
if (x == 0 || x == chunkSizeXZ - 1 ||
y == 0 || y == chunkHeight - 1 ||
z == 0 || z == chunkSizeXZ - 1)
{
v.VoxelType = 0;
v.Value = 0;
}
else
{
if (y <= bedrockHeight)
{
v.VoxelType = 1;
}
else if (y <= rockHeight)
{
v.VoxelType = 2;
}
else if (y <= dirtHeight)
{
v.VoxelType = 3;
}
//else if (y <= sandHeight)
//{
// v.VoxelType = 4;
//}
else
{
v.VoxelType = 0;
}
float pointValue = fractalNoise.Sample3D(
x / (float)(m_worldResolution - 1),
y / (float)(m_worldResolution - 1),
z / (float)(m_worldResolution - 1)
);
v.Value = pointValue;
}
}
}
}
}
void Generate()
{
DateTime startTime = System.DateTime.Now;
INoise perlin = new PerlinNoise(seed, 2f);
FractalNoise fractal = new FractalNoise(perlin, 3, 1f);
MarchingCube marching = new MarchingCube();
Marching.Surface = 0f;
width = sizeScale;
height = sizeScale;
length = sizeScale;
float[] voxels = new float[width * height * length];
//Fill voxels with values. Im using perlin noise but any method to create voxels will work.
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
for (int z = 0; z < length; z++)
{
float fx = x / (width - 1.0f);
float fy = y / (height - 1.0f);
float fz = z / (length - 1.0f);
int idx = x + y * width + z * width * height;
voxels[idx] = fractal.Sample3D(fx, fy, fz);
}
}
}
verts = new List <Vector3>();
indices = new List <int>();
if (useJobSystem)
{
MarchingCubeParallel marching_p = new MarchingCubeParallel(0);
MarchingCubeParallel.MarchJob job;
JobHandle handle = marching_p.Generate(new List <float>(voxels), width, height, length, out job);
StartCoroutine(Wait4Complete(handle, job));
}
else
{
marching.Generate(voxels, width, height, length, verts, indices);
int maxVertsPerMesh = 30000; //must be divisible by 3, ie 3 verts == 1 triangle
int numMeshes = verts.Count / maxVertsPerMesh + 1;
for (int i = 0; i < numMeshes; i++)
{
List <Vector3> splitVerts = new List <Vector3>();
List <int> splitIndices = new List <int>();
for (int j = 0; j < maxVertsPerMesh; j++)
{
int idx = i * maxVertsPerMesh + j;
if (idx < verts.Count)
{
splitVerts.Add(verts[idx]);
splitIndices.Add(j);
}
}
if (splitVerts.Count == 0)
{
continue;
}
Mesh mesh = new Mesh();
mesh.SetVertices(splitVerts);
mesh.SetTriangles(splitIndices, 0);
mesh.RecalculateBounds();
mesh.RecalculateNormals();
GameObject go = new GameObject("Mesh");
go.transform.parent = transform;
go.AddComponent <MeshFilter>();
go.AddComponent <MeshRenderer>();
go.GetComponent <Renderer>().material = m_material;
go.GetComponent <MeshFilter>().mesh = mesh;
go.transform.localPosition = new Vector3(-width / 2, -height / 2, -length / 2);
meshes.Add(go);
}
}
double timeCost = System.DateTime.Now.Subtract(startTime).TotalMilliseconds;
print("Time Cost : " + timeCost + " at size " + (8 * sizeScale));
}
void Start()
{
INoise perlin = new PerlinNoise(seed, 2.0f);
FractalNoise fractal = new FractalNoise(perlin, 3, 1.0f);
//Set the mode used to create the mesh.
//Cubes is faster and creates less verts, tetrahedrons is slower and creates more verts but better represents the mesh surface.
Marching marching = null;
if (mode == MARCHING_MODE.TETRAHEDRON)
{
marching = new MarchingTertrahedron();
}
else
{
marching = new MarchingCubes();
}
//Surface is the value that represents the surface of mesh
//For example the perlin noise has a range of -1 to 1 so the mid point is where we want the surface to cut through.
//The target value does not have to be the mid point it can be any value with in the range.
marching.Surface = 0.0f;
//The size of voxel array.
int width = 32;
int height = 32;
int length = 32;
float[] voxels = new float[width * height * length];
//Fill voxels with values. Im using perlin noise but any method to create voxels will work.
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
for (int z = 0; z < length; z++)
{
float fx = x / (width - 1.0f);
float fy = y / (height - 1.0f);
float fz = z / (length - 1.0f);
int idx = x + y * width + z * width * height;
voxels[idx] = fractal.Sample3D(fx, fy, fz);
}
}
}
List <Vector3> verts = new List <Vector3>();
List <int> indices = new List <int>();
System.Diagnostics.Stopwatch measure = new System.Diagnostics.Stopwatch();
measure.Start();
marching.Generate(voxels, width, height, length, verts, indices);
verts = MeshUtils.WeldVertices(verts, indices);
measure.Stop();
Debug.Log(string.Format("Time elapsed: {0}", measure.Elapsed));
Mesh mesh = new Mesh();
mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
mesh.SetVertices(verts);
mesh.SetTriangles(indices, 0);
mesh.RecalculateBounds();
mesh.RecalculateNormals();
GameObject go = new GameObject("Mesh");
go.transform.parent = transform;
go.AddComponent <MeshFilter>();
go.AddComponent <MeshRenderer>();
go.GetComponent <Renderer>().material = m_material;
go.GetComponent <MeshFilter>().mesh = mesh;
go.transform.localPosition = new Vector3(-width / 2, -height / 2, -length / 2);
}