public static void Populate(Volume3D volume)
{
CalculateCount(volume);
CreateVertices(volume);
CreateEdges(volume);
CreateHexahedrons(volume);
}
private static void CreateHexahedrons(Volume3D volume)
{
List <Hexahedron> hexahedrons = new List <Hexahedron>();
for (int x = 0; x < volume.count.x; x++)
{
for (int y = 0; y < volume.count.y; y++)
{
for (int z = 0; z < volume.count.z; z++)
{
bool withinX = (x + 1) < volume.count.x;
bool withinY = (y + 1) < volume.count.y;
bool withinZ = (z + 1) < volume.count.z;
if (withinX && withinY && withinZ)
{
Vertex a = volume.vertices[x, y, z];
Vertex b = volume.vertices[x, y, z + 1];
Vertex c = volume.vertices[x + 1, y, z + 1];
Vertex d = volume.vertices[x + 1, y, z];
Vertex e = volume.vertices[x, y + 1, z];
Vertex f = volume.vertices[x, y + 1, z + 1];
Vertex g = volume.vertices[x + 1, y + 1, z + 1];
Vertex h = volume.vertices[x + 1, y + 1, z];
hexahedrons.Add(new Hexahedron(a, b, c, d, e, f, g, h));
}
}
}
}
volume.polyhedrons = hexahedrons.ToArray();
Debug.Log(string.Format("Created {0} hexahedrons", hexahedrons.Count));
}
private static void CalculateCount(Volume3D volume)
{
volume.count = new Vector3Int()
{
x = (int)(volume.size.x * volume.density.x) + 1,
y = (int)(volume.size.y * volume.density.y) + 1,
z = (int)(volume.size.z * volume.density.z) + 1
};
}
private static void CreateEdges(Volume3D volume)
{
volume.edges = new Edge[volume.count.x, volume.count.y, volume.count.z][];
var buffer = new List <Edge>(6);
for (int x = 0; x < volume.count.x; x++)
{
for (int y = 0; y < volume.count.y; y++)
{
for (int z = 0; z < volume.count.z; z++)
{
if ((x + 1) < volume.count.x)
{
buffer.Add(new Edge(volume.vertices[x, y, z], volume.vertices[x + 1, y, z]));
}
if ((x - 1) >= 0)
{
buffer.Add(new Edge(volume.vertices[x, y, z], volume.vertices[x - 1, y, z]));
}
if ((y + 1) < volume.count.y)
{
buffer.Add(new Edge(volume.vertices[x, y, z], volume.vertices[x, y + 1, z]));
}
if ((y - 1) >= 0)
{
buffer.Add(new Edge(volume.vertices[x, y, z], volume.vertices[x, y - 1, z]));
}
if ((z + 1) < volume.count.z)
{
buffer.Add(new Edge(volume.vertices[x, y, z], volume.vertices[x, y, z + 1]));
}
if ((z - 1) >= 0)
{
buffer.Add(new Edge(volume.vertices[x, y, z], volume.vertices[x, y, z - 1]));
}
volume.edges[x, y, z] = buffer.ToArray();
buffer.Clear();
}
}
}
}
private static void CreateVertices(Volume3D volume)
{
Vector3 spacing = new Vector3()
{
x = 1f / (volume.density.x),
y = 1f / (volume.density.y),
z = 1f / (volume.density.z)
};
Vector3 origin = new Vector3()
{
x = (-volume.size.x / 2f),
y = (-volume.size.y / 2f),
z = (-volume.size.z / 2f)
};
volume.vertices = new Vertex[volume.count.x, volume.count.y, volume.count.z];
for (int x = 0; x < volume.count.x; x++)
{
for (int y = 0; y < volume.count.y; y++)
{
for (int z = 0; z < volume.count.z; z++)
{
Vector3 position = new Vector3()
{
x = origin.x + (spacing.x * x),
y = origin.y + (spacing.y * y),
z = origin.z + (spacing.z * z)
};
volume.vertices[x, y, z] = new Vertex(position);
}
}
}
}