bool CrearVoxel(float px, float py, float pz, string pnombre)
{
//Creacion del voxel la db
TerrainVolumeData volumeData = VolumeData.CreateEmptyVolumeData<TerrainVolumeData>(new Region(0, 0, 0, Ancho - 1, Altura - 1, Profundidad - 1), @DirectorioLocal + NombreMapa+"/"+pnombre + ".vdb");
MaterialSet materialSet = new MaterialSet();
double DifAltura = Altura - Altura * 0.9;
for (int z = 0; z < Profundidad; z++)
{
for (int y = 0; y < (int)DifAltura; y++)
{
for (int x = 0; x < Ancho; x++)
{
materialSet.weights[0] = (byte)255;
volumeData.SetVoxel(x, y, z, materialSet);
}
}
}
volumeData.CommitChanges();
//asignacion del prefab
GameObject VoxelTemporal = Instantiate(VoxelPrefab) as GameObject;
VoxelTemporal.name = pnombre;
VoxelTemporal.transform.GetChild(0).GetComponent<TerrainVolume>().data=volumeData;
VoxelTemporal.transform.GetChild(1).Translate(Ancho/2, (float)DifAltura, Profundidad/2);
VoxelTemporal.transform.position = new Vector3(px,py,pz);
MapaVoxels.Add(pnombre, VoxelTemporal);
VoxelActual = VoxelTemporal;
ClaveActual = pnombre;
return false;
}
private void CreateAVolumeDB()
{
System.Random randomIntGenerator = new System.Random();
int randomInt = randomIntGenerator.Next();
string saveLocation = Paths.voxelDatabases + "/Matt-test" + randomInt + ".vdb";
var volumeBounds = new Region(Vector3i.zero, size);
ColoredCubesVolumeData data = VolumeData.CreateEmptyVolumeData <ColoredCubesVolumeData>(volumeBounds, null); // saveLocation);
var coloredCubeVolume = GetComponent <ColoredCubesVolume>();
coloredCubeVolume.data = data;
float invRockScale = 1f / noiseScale;
MaterialSet materialSet = new MaterialSet();
// It's best to create these outside of the loop.
QuantizedColor red = new QuantizedColor(255, 0, 0, 255);
QuantizedColor blue = new QuantizedColor(122, 122, 255, 255);
QuantizedColor gray = new QuantizedColor(127, 127, 127, 255);
QuantizedColor white = new QuantizedColor(255, 255, 255, 255);
// Iterate over every voxel of our volume
for (int z = 0; z < size.x; z++)
{
for (int y = 0; y < size.y; y++)
{
for (int x = 0; x < size.z; x++)
{
// Simplex noise is quite high frequency. We scale the sample position to reduce this.
float sampleX = (float)x * invRockScale;
float sampleY = (float)y * invRockScale;
float sampleZ = (float)z * invRockScale;
// range -1 to +1
float simplexNoiseValue = SimplexNoise.Noise.Generate(sampleX, sampleY, sampleZ);
simplexNoiseValue -= y / size.y * .75f;
// mul by 5 and clamp?
//simplexNoiseValue *= 5f;
//simplexNoiseValue = Mathf.Clamp(simplexNoiseValue, -.5f, .5f);
//simplexNoiseValue += .5f;
//simplexNoiseValue *= 255;
if (simplexNoiseValue > 0f)
{
data.SetVoxel(x, y, z, blue);
}
}
}
}
data.CommitChanges();
Debug.Log("Voxel db saved to: " + saveLocation);
}
/// Sets the material weights of the specified position.
/**
* \param x The 'x' position of the voxel to set.
* \param y The 'y' position of the voxel to set.
* \param z The 'z' position of the voxel to set.
* \param materialSet The material weights the voxel should be set to.
*/
public void SetVoxel(int x, int y, int z, MaterialSet materialSet)
{
// The initialization can fail (bad filename, database locked, etc), so the volume handle could still be null.
if(volumeHandle.HasValue)
{
if(x >= enclosingRegion.lowerCorner.x && y >= enclosingRegion.lowerCorner.y && z >= enclosingRegion.lowerCorner.z
&& x <= enclosingRegion.upperCorner.x && y <= enclosingRegion.upperCorner.y && z <= enclosingRegion.upperCorner.z)
{
CubiquityDLL.SetVoxel(volumeHandle.Value, x, y, z, materialSet);
}
}
}
/// Sets the material weights of the specified position.
/**
* \param x The 'x' position of the voxel to set.
* \param y The 'y' position of the voxel to set.
* \param z The 'z' position of the voxel to set.
* \param materialSet The material weights the voxel should be set to.
*/
public void SetVoxel(int x, int y, int z, MaterialSet materialSet)
{
// The initialization can fail (bad filename, database locked, etc), so the volume handle could still be null.
if (volumeHandle.HasValue)
{
if (x >= enclosingRegion.lowerCorner.x && y >= enclosingRegion.lowerCorner.y && z >= enclosingRegion.lowerCorner.z &&
x <= enclosingRegion.upperCorner.x && y <= enclosingRegion.upperCorner.y && z <= enclosingRegion.upperCorner.z)
{
CubiquityDLL.SetVoxel(volumeHandle.Value, x, y, z, materialSet);
}
}
}
// Use this for initialization
void Start ()
{
// Dimensions of our volume.
int width = 64;
int height = 64;
int depth = 64;
TerrainVolumeData volumeData = VolumeData.CreateEmptyVolumeData<TerrainVolumeData>(new Region(0, 0, 0, width - 1, height - 1, depth - 1));
float noiseScale = 32.0f;
float invNoiseScale = 1.0f / noiseScale;
// Let's keep the allocation outside of the loop.
MaterialSet materialSet = new MaterialSet();
// Iterate over each voxel and assign a value to it
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
// Simplex noise is quite high frequency. We scale the sample position to reduce this.
float sampleX = (float)x * invNoiseScale;
float sampleY = (float)y * invNoiseScale;
float sampleZ = (float)z * invNoiseScale;
// Get the noise value for the current position.
// Returned value should be in the range -1 to +1.
float simplexNoiseValue = SimplexNoise.Noise.Generate(sampleX, sampleY, sampleZ);
// Cubiquity material weights need to be in the range 0 - 255.
simplexNoiseValue += 1.0f; // Now it's 0.0 to 2.0
simplexNoiseValue *= 127.5f; // Now it's 0.0 to 255.0
materialSet.weights[0] = (byte)simplexNoiseValue;
// We can now write our computed voxel value into the volume.
volumeData.SetVoxel(x, y, z, materialSet);
}
}
}
//Add the required volume component.
TerrainVolume terrainVolume = gameObject.AddComponent<TerrainVolume>();
// Set the provided data.
terrainVolume.data = volumeData;
// Add the renderer
gameObject.AddComponent<TerrainVolumeRenderer>();
}
/// Gets the material weights of the specified position.
/**
* \param x The 'x' position of the voxel to get.
* \param y The 'y' position of the voxel to get.
* \param z The 'z' position of the voxel to get.
* \return The material weights of the voxel.
*/
public MaterialSet GetVoxel(int x, int y, int z)
{
// The initialization can fail (bad filename, database locked, etc), so the volume handle could still be null.
MaterialSet materialSet;
if (volumeHandle.HasValue)
{
CubiquityDLL.GetVoxelMC(volumeHandle.Value, x, y, z, out materialSet);
}
else
{
materialSet = new MaterialSet();
}
return(materialSet);
}
TerrainVolumeData crearVolumenData(string direccion)
{
TerrainVolumeData volumeData = VolumeData.CreateEmptyVolumeData<TerrainVolumeData>(new Region(0, 0, 0, width - 1, height - 1, depth - 1),@"C:\CS-UCSP\Evolcraft\"+ direccion+".vdb");
numObjects++;
//Si no recibe un path, crea solo un temporal. Caso contrario, evalua si es un path relativo o no...
MaterialSet materialSet = new MaterialSet();
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
materialSet.weights[0] = (byte)255;
volumeData.SetVoxel(x, y, z, materialSet);
}
}
}
volumeData.CommitChanges ();
return volumeData;
}
void DestroyVoxels(int xPos, int yPos, int zPos, int range)
{
// Initialise outside the loop, but we'll use it later.
int rangeSquared = range * range;
MaterialSet emptyMaterialSet = new MaterialSet();
// Iterage over every voxel in a cubic region defined by the received position (the center) and
// the range. It is quite possible that this will be hundreds or even thousands of voxels.
for(int z = zPos - range; z < zPos + range; z++)
{
for(int y = yPos - range; y < yPos + range; y++)
{
for(int x = xPos - range; x < xPos + range; x++)
{
// Compute the distance from the current voxel to the center of our explosion.
int xDistance = x - xPos;
int yDistance = y - yPos;
int zDistance = z - zPos;
// Working with squared distances avoids costly square root operations.
int distSquared = xDistance * xDistance + yDistance * yDistance + zDistance * zDistance;
// We're iterating over a cubic region, but we want our explosion to be spherical. Therefore
// we only further consider voxels which are within the required range of our explosion center.
// The corners of the cubic region we are iterating over will fail the following test.
if(distSquared < rangeSquared)
{
terrainVolume.data.SetVoxel(x, y, z, emptyMaterialSet);
}
}
}
}
range += 2;
TerrainVolumeEditor.BlurTerrainVolume(terrainVolume, new Region(xPos - range, yPos - range, zPos - range, xPos + range, yPos + range, zPos + range));
//TerrainVolumeEditor.BlurTerrainVolume(terrainVolume, new Region(xPos - range, yPos - range, zPos - range, xPos + range, yPos + range, zPos + range));
//TerrainVolumeEditor.BlurTerrainVolume(terrainVolume, new Region(xPos - range, yPos - range, zPos - range, xPos + range, yPos + range, zPos + range));
}
void Create3DSimplexNoiseVolumeVDB()
{
// Randomize the filename incase the file already exists
System.Random randomIntGenerator = new System.Random();
int randomInt = randomIntGenerator.Next();
string saveLocation = Paths.voxelDatabases + "/3d-simplex-noise-" + randomInt + ".vdb";
// The size of the volume we will generate
int width = 256;
int height = 256;
int depth = 256;
TerrainVolumeData data = VolumeData.CreateEmptyVolumeData<TerrainVolumeData>(new Region(0, 0, 0, width - 1, height - 1, depth - 1), saveLocation);
// This scale factor comtrols the size of the rocks which are generated.
float rockScale = 32.0f;
float invRockScale = 1.0f / rockScale;
// Let's keep the allocation outside of the loop.
MaterialSet materialSet = new MaterialSet();
// Iterate over every voxel of our volume
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
// Make sure we don't have anything left in here from the previous voxel
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
// Simplex noise is quite high frequency. We scale the sample position to reduce this.
float sampleX = (float)x * invRockScale;
float sampleY = (float)y * invRockScale;
float sampleZ = (float)z * invRockScale;
// Get the noise value for the current position.
// Returned value should be in the range -1 to +1.
float simplexNoiseValue = SimplexNoise.Noise.Generate(sampleX, sampleY, sampleZ);
// Cubiquity renders anything below the threshold as empty and anythng above as solid, but
// in general it is easiest if empty space is completly empty and solid space is completly
// solid. The exception to this is the region near our surface, where a gentle transition helps
// obtain smooth shading. By scaling by a large number and then clamping we achieve this effect
// of making most voxels fully solid or fully empty except near the surface..
simplexNoiseValue *= 5.0f;
simplexNoiseValue = Mathf.Clamp(simplexNoiseValue, -0.5f, 0.5f);
// Go back to the range 0.0 to 1.0;
simplexNoiseValue += 0.5f;
// And then to 0 to 255, ready to convert into a byte.
simplexNoiseValue *= 255;
// Write the final value value into the first material channel (the one with the rock texture).
// The value being written is usually 0 (empty) or 255 (solid) except around the transition.
materialSet.weights[0] = (byte)simplexNoiseValue;
// We can now write our computed voxel value into the volume.
data.SetVoxel(x, y, z, materialSet);
}
}
}
// We need to commit this so that the changes made by the previous,line are actually written
// to the voxel database. Otherwise they are just kept in temporary storage and will be lost.
data.CommitChanges();
Debug.Log("Voxel database has been saved to '" + saveLocation + "'");
}
void Create2DSimplexNoiseVolumeVDB()
{
// Randomize the filename incase the file already exists
System.Random randomIntGenerator = new System.Random();
int randomInt = randomIntGenerator.Next();
string saveLocation = Paths.voxelDatabases + "/2d-simplex-noise-" + randomInt + ".vdb";
// The size of the volume we will generate
int width = 256;
int height = 32;
int depth = 256;
TerrainVolumeData data = VolumeData.CreateEmptyVolumeData<TerrainVolumeData>(new Region(0, 0, 0, width - 1, height - 1, depth - 1), saveLocation);
// This scale factor comtrols the size of the rocks which are generated.
float rockScale = 32.0f;
float invRockScale = 1.0f / rockScale;
// Let's keep the allocation outside of the loop.
MaterialSet materialSet = new MaterialSet();
// Iterate over every voxel of our volume
for (int z = 0; z < depth; z++)
{
for (int x = 0; x < width; x++)
{
// Simplex noise is quite high frequency. We scale the sample position to reduce this.
float sampleX = (float)x * invRockScale;
float sampleZ = (float)z * invRockScale;
// Get the noise value for the current position.
// Returned value should be in the range -1 to +1.
float simplexNoiseValue = SimplexNoise.Noise.Generate(sampleX, sampleZ);
simplexNoiseValue += 1.0f;
simplexNoiseValue *= 16.0f;
for (int y = 0; y < height; y++)
{
// Make sure we don't have anything left in here from the previous voxel
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
if (y < simplexNoiseValue)
{
// Write the final value value into the first material channel (the one with the rock texture).
// The value being written is usually 0 (empty) or 255 (solid) except around the transition.
materialSet.weights[0] = (byte)255;
}
// We can now write our computed voxel value into the volume.
data.SetVoxel(x, y, z, materialSet);
}
}
}
// We need to commit this so that the changes made by the previous,line are actually written
// to the voxel database. Otherwise they are just kept in temporary storage and will be lost.
data.CommitChanges();
Debug.Log("Voxel database has been saved to '" + saveLocation + "'");
}
void Create3DSimplexNoiseVolumeVDB()
{
// Randomize the filename incase the file already exists
System.Random randomIntGenerator = new System.Random();
int randomInt = randomIntGenerator.Next();
string saveLocation = Paths.voxelDatabases + "/3d-simplex-noise-" + randomInt + ".vdb";
// The size of the volume we will generate
int width = 256;
int height = 256;
int depth = 256;
TerrainVolumeData data = VolumeData.CreateEmptyVolumeData <TerrainVolumeData>(new Region(0, 0, 0, width - 1, height - 1, depth - 1), saveLocation);
// This scale factor comtrols the size of the rocks which are generated.
float rockScale = 32.0f;
float invRockScale = 1.0f / rockScale;
// Let's keep the allocation outside of the loop.
MaterialSet materialSet = new MaterialSet();
// Iterate over every voxel of our volume
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
// Make sure we don't have anything left in here from the previous voxel
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
// Simplex noise is quite high frequency. We scale the sample position to reduce this.
float sampleX = (float)x * invRockScale;
float sampleY = (float)y * invRockScale;
float sampleZ = (float)z * invRockScale;
// Get the noise value for the current position.
// Returned value should be in the range -1 to +1.
float simplexNoiseValue = SimplexNoise.Noise.Generate(sampleX, sampleY, sampleZ);
// Cubiquity renders anything below the threshold as empty and anythng above as solid, but
// in general it is easiest if empty space is completly empty and solid space is completly
// solid. The exception to this is the region near our surface, where a gentle transition helps
// obtain smooth shading. By scaling by a large number and then clamping we achieve this effect
// of making most voxels fully solid or fully empty except near the surface..
simplexNoiseValue *= 5.0f;
simplexNoiseValue = Mathf.Clamp(simplexNoiseValue, -0.5f, 0.5f);
// Go back to the range 0.0 to 1.0;
simplexNoiseValue += 0.5f;
// And then to 0 to 255, ready to convert into a byte.
simplexNoiseValue *= 255;
// Write the final value value into the first material channel (the one with the rock texture).
// The value being written is usually 0 (empty) or 255 (solid) except around the transition.
materialSet.weights[0] = (byte)simplexNoiseValue;
// We can now write our computed voxel value into the volume.
data.SetVoxel(x, y, z, materialSet);
}
}
}
// We need to commit this so that the changes made by the previous,line are actually written
// to the voxel database. Otherwise they are just kept in temporary storage and will be lost.
data.CommitChanges();
Debug.Log("Voxel database has been saved to '" + saveLocation + "'");
}
void Create2DSimplexNoiseVolumeVDB()
{
// Randomize the filename incase the file already exists
System.Random randomIntGenerator = new System.Random();
int randomInt = randomIntGenerator.Next();
string saveLocation = Paths.voxelDatabases + "/2d-simplex-noise-" + randomInt + ".vdb";
// The size of the volume we will generate
int width = 256;
int height = 32;
int depth = 256;
TerrainVolumeData data = VolumeData.CreateEmptyVolumeData <TerrainVolumeData>(new Region(0, 0, 0, width - 1, height - 1, depth - 1), saveLocation);
// This scale factor comtrols the size of the rocks which are generated.
float rockScale = 32.0f;
float invRockScale = 1.0f / rockScale;
// Let's keep the allocation outside of the loop.
MaterialSet materialSet = new MaterialSet();
// Iterate over every voxel of our volume
for (int z = 0; z < depth; z++)
{
for (int x = 0; x < width; x++)
{
// Simplex noise is quite high frequency. We scale the sample position to reduce this.
float sampleX = (float)x * invRockScale;
float sampleZ = (float)z * invRockScale;
// Get the noise value for the current position.
// Returned value should be in the range -1 to +1.
float simplexNoiseValue = SimplexNoise.Noise.Generate(sampleX, sampleZ);
simplexNoiseValue += 1.0f;
simplexNoiseValue *= 16.0f;
for (int y = 0; y < height; y++)
{
// Make sure we don't have anything left in here from the previous voxel
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
if (y < simplexNoiseValue)
{
// Write the final value value into the first material channel (the one with the rock texture).
// The value being written is usually 0 (empty) or 255 (solid) except around the transition.
materialSet.weights[0] = (byte)255;
}
// We can now write our computed voxel value into the volume.
data.SetVoxel(x, y, z, materialSet);
}
}
}
// We need to commit this so that the changes made by the previous,line are actually written
// to the voxel database. Otherwise they are just kept in temporary storage and will be lost.
data.CommitChanges();
Debug.Log("Voxel database has been saved to '" + saveLocation + "'");
}
public static void GeneratePlanet(TerrainVolumeData volumeData, float planetRadius, float mat1Radius, float mat2Radius, float mat3Radius)
{
Region volumeBounds = volumeData.enclosingRegion;
MaterialSet materialSet = new MaterialSet();
for(int z = volumeBounds.lowerCorner.z; z <= volumeBounds.upperCorner.z; z++)
{
for(int y = volumeBounds.lowerCorner.y; y <= volumeBounds.upperCorner.y; y++)
{
for(int x = volumeBounds.lowerCorner.x; x <= volumeBounds.upperCorner.x; x++)
{
// We are going to compute our density value based on the distance of a voxel from the center of our planet.
// This is a function which (by definition) is zero at the center of the planet and has a smoothly increasing
// value as we move away from the center.
//
// Note: For efficiency we could probably adapt this to work with squared distances (thereby eliminating
// the square root operation), but we'd like to keep this example as intuitive as possible.
float distFromCenter = Mathf.Sqrt(x * x + y * y + z * z);
// We actually want our volume to have high values in the center and low values as we move out, because our
// eath should be a solid sphere surrounded by empty space. If we invert the distance then this is a step in
// the right direction. We still have zero in the center, but lower (negative) values as we move out.
float density = -distFromCenter;
// By adding the 'planetRadius' we now have a function which starts at 'planetRadius' and still decreases as it
// moves out. The function passes through zero at a distance of 'planetRadius' and then continues do decrease
// as it gets even further out.
density += planetRadius;
// Ideally we would like our final density value to be '255' for voxels inside the planet and '0' for voxels
// outside the planet. At the surface there should be a transition but this should occur not too quickly and
// not too slowly, as both of these will result in a jagged appearance to the mesh.
//
// We probably want the transition to occur over a few voxels, whereas it currently occurs over 255 voxels
// because it was derived from the distance. By scaling the density field we effectivly compress the rate
// at which it changes at the surface. We also make the center much too high and the outside very low, but
// we will clamp these to the corect range later.
//
// Note: You can try commenting out or changing the value on this line to see the effect it has.
density *= 50;
// Until now we've been defining our density field as if the threshold was at zero, with positive densities
// being solid and negative densities being empty. But actually Cubiquity operates on the range 0 to 255, and
// uses a threashold of 127 to decide where to place the generated surface. Therefore we shift and clamp our
// density value and store it in a byte.
density += 127;
byte densityAsByte = (byte)(Mathf.Clamp(density, 0, 255));
if(distFromCenter < mat3Radius)
{
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
materialSet.weights[3] = densityAsByte;
}
else if(distFromCenter < mat2Radius)
{
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = densityAsByte;
materialSet.weights[3] = 0;
}
else if(distFromCenter < mat1Radius)
{
materialSet.weights[0] = 0;
materialSet.weights[1] = densityAsByte;
materialSet.weights[2] = 0;
materialSet.weights[3] = 0;
}
else //Surface material
{
materialSet.weights[0] = densityAsByte;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
materialSet.weights[3] = 0;
}
volumeData.SetVoxel(x, y, z, materialSet);
}
}
}
}
public static void GeneratePlanet(TerrainVolumeData volumeData, float planetRadius, float mat1Radius, float mat2Radius, float mat3Radius)
{
Region volumeBounds = volumeData.enclosingRegion;
MaterialSet materialSet = new MaterialSet();
for (int z = volumeBounds.lowerCorner.z; z <= volumeBounds.upperCorner.z; z++)
{
for (int y = volumeBounds.lowerCorner.y; y <= volumeBounds.upperCorner.y; y++)
{
for (int x = volumeBounds.lowerCorner.x; x <= volumeBounds.upperCorner.x; x++)
{
// We are going to compute our density value based on the distance of a voxel from the center of our planet.
// This is a function which (by definition) is zero at the center of the planet and has a smoothly increasing
// value as we move away from the center.
//
// Note: For efficiency we could probably adapt this to work with squared distances (thereby eliminating
// the square root operation), but we'd like to keep this example as intuitive as possible.
float distFromCenter = Mathf.Sqrt(x * x + y * y + z * z);
// We actually want our volume to have high values in the center and low values as we move out, because our
// eath should be a solid sphere surrounded by empty space. If we invert the distance then this is a step in
// the right direction. We still have zero in the center, but lower (negative) values as we move out.
float density = -distFromCenter;
// By adding the 'planetRadius' we now have a function which starts at 'planetRadius' and still decreases as it
// moves out. The function passes through zero at a distance of 'planetRadius' and then continues do decrease
// as it gets even further out.
density += planetRadius;
// Ideally we would like our final density value to be '255' for voxels inside the planet and '0' for voxels
// outside the planet. At the surface there should be a transition but this should occur not too quickly and
// not too slowly, as both of these will result in a jagged appearance to the mesh.
//
// We probably want the transition to occur over a few voxels, whereas it currently occurs over 255 voxels
// because it was derived from the distance. By scaling the density field we effectivly compress the rate
// at which it changes at the surface. We also make the center much too high and the outside very low, but
// we will clamp these to the corect range later.
//
// Note: You can try commenting out or changing the value on this line to see the effect it has.
density *= 50;
// Until now we've been defining our density field as if the threshold was at zero, with positive densities
// being solid and negative densities being empty. But actually Cubiquity operates on the range 0 to 255, and
// uses a threashold of 127 to decide where to place the generated surface. Therefore we shift and clamp our
// density value and store it in a byte.
density += 127;
byte densityAsByte = (byte)(Mathf.Clamp(density, 0, 255));
if (distFromCenter < mat3Radius)
{
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
materialSet.weights[3] = densityAsByte;
}
else if (distFromCenter < mat2Radius)
{
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = densityAsByte;
materialSet.weights[3] = 0;
}
else if (distFromCenter < mat1Radius)
{
materialSet.weights[0] = 0;
materialSet.weights[1] = densityAsByte;
materialSet.weights[2] = 0;
materialSet.weights[3] = 0;
}
else //Surface material
{
materialSet.weights[0] = densityAsByte;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
materialSet.weights[3] = 0;
}
volumeData.SetVoxel(x, y, z, materialSet);
}
}
}
}
// Use this for initialization
void Start()
{
// The size of the volume we will generate
int width = 128;
int height = 32;
int depth = 128;
// FIXME - Where should we delete this?
/// [DoxygenSnippet-CreateEmptyTerrainVolumeData]
//Create an empty TerrainVolumeData with dimensions width * height * depth
TerrainVolumeData data = VolumeData.CreateEmptyVolumeData<TerrainVolumeData>(new Region(0, 0, 0, width-1, height-1, depth-1));
/// [DoxygenSnippet-CreateEmptyTerrainVolumeData]
TerrainVolume volume = GetComponent<TerrainVolume>();
TerrainVolumeRenderer volumeRenderer = GetComponent<TerrainVolumeRenderer>();
volume.data = data;
// This example looks better if we adjust the scaling factors on the textures.
volumeRenderer.material.SetTextureScale("_Tex0", new Vector2(0.062f, 0.062f));
volumeRenderer.material.SetTextureScale("_Tex1", new Vector2(0.125f, 0.125f));
volumeRenderer.material.SetTextureScale("_Tex2", new Vector2(0.125f, 0.125f));
// At this point our volume is set up and ready to use. The remaining code is responsible
// for iterating over all the voxels and filling them according to our noise functions.
// This scale factor comtrols the size of the rocks which are generated.
float rockScale = 32.0f;
float invRockScale = 1.0f / rockScale;
// Let's keep the allocation outside of the loop.
MaterialSet materialSet = new MaterialSet();
// Iterate over every voxel of our volume
for(int z = 0; z < depth; z++)
{
for(int y = height-1; y > 0; y--)
{
for(int x = 0; x < width; x++)
{
// Make sure we don't have anything left in here from the previous voxel
materialSet.weights[0] = 0;
materialSet.weights[1] = 0;
materialSet.weights[2] = 0;
// Simplex noise is quite high frequency. We scale the sample position to reduce this.
float sampleX = (float)x * invRockScale;
float sampleY = (float)y * invRockScale;
float sampleZ = (float)z * invRockScale;
// Get the noise value for the current position.
// Returned value should be in the range -1 to +1.
float simplexNoiseValue = SimplexNoise.Noise.Generate(sampleX, sampleY, sampleZ);
// We want to fade off the noise towards the top of the volume (so that the rocks don't go
// up to the sky) adn add extra material near the bottom of the volume (to create a floor).
// This altitude value is initially in the range from 0 to +1.
float altitude = (float)(y + 1) / (float)height;
// Map the altitude to the range -1.0 to +1.0...
altitude = (altitude * 2.0f) - 1.0f;
// Subtract the altitude from the noise. This adds
// material near the ground and subtracts it higher up.
simplexNoiseValue -= altitude;
// After combining our noise value and our altitude we now have values between -2.0 and 2.0.
// Cubiquity renders anything below the threshold as empty and anythng above as solid, but
// in general it is easiest if empty space is completly empty and solid space is completly
// solid. The exception to this is the region near our surface, where a gentle transition helps
// obtain smooth shading. By scaling by a large number and then clamping we achieve this effect
// of making most voxels fully solid or fully empty except near the surface..
simplexNoiseValue *= 5.0f;
simplexNoiseValue = Mathf.Clamp(simplexNoiseValue, -0.5f, 0.5f);
// Go back to the range 0.0 to 1.0;
simplexNoiseValue += 0.5f;
// And then to 0 to 255, ready to convert into a byte.
simplexNoiseValue *= 255;
// Write the final value value into the third material channel (the one with the rock texture).
// The value being written is usually 0 (empty) or 255 (solid) except around the transition.
materialSet.weights[2] = (byte)simplexNoiseValue;
// Lastly we write soil or grass voxels into the volume to create a level floor between the rocks.
// This means we want to set the sum of the materials to 255 if the voxel is below the floor height.
// We don't want to interfere with the rocks on the transition between the material so we work out
// how much extra we have to add to get to 255 and then add that to either soil or grass.
byte excess = (byte)(255 - materialSet.weights[2]);
if(y < 11)
{
// Add to soil material channel.
materialSet.weights[1] = excess;
}
else if(y < 12)
{
// Add to grass material channel.
materialSet.weights[0] = excess;
}
// We can now write our computed voxel value into the volume.
data.SetVoxel(x, y, z, materialSet);
}
}
}
}
