private float yIntensity = 0.3F; // Intensity of randomization on the Y axis
#endregion Fields
#region Methods
/**
* This function generates the heightmap and makes the vertices.
* Normals are calculated by the MakeVertsUnique() function.
* Calling this function is required, so there's no need to be save about executing the
* RecalculateNormals() function
*/
public void GenerateHeightmap()
{
noise = new ex.FractalNoise();
noise.SetNoise( offsetX, offsetY, seed );
mesh = GetComponent<MeshFilter>().mesh;
if( !mesh ) {
Debug.Log( "Can't find mesh!" );
return;
}
if( landMaterial )
renderer.material = landMaterial;
else
renderer.material.color = Color.magenta;
Vector3[] vertices = new Vector3[Height * Width];
Vector2[] uv = new Vector2[Height * Width];
Vector2 uvScale = new Vector2( 1.0f / ( Width - 1 ), 1.0f / ( Height - 1 ) );
Vector3 sizeScale = new Vector3( Size.x / ( Width - 1 ), Size.y, Size.z / ( Height - 1 ) );
int y = 0;
int x = 0;
for( y = 0; y < Height; y++ ) {
for( x = 0; x < Width; x++ ) {
Vector3 vertex = new Vector3( x, noise.GenerateFractal( amplitude, frequency, octaves, (float) x, (float) y, persistence ), y );
vertex.y += noise.GeneratePerlin( (float) x, (float) y ) * yIntensity;
vertices[y*Width + x] = Vector3.Scale( sizeScale, vertex ); // Sets the vertex position on the grid
uv[y * Width + x] = Vector2.Scale( new Vector2( x, y ), uvScale );
if( y < Height - 1 && y > 0 && x < Width - 1 && x > 0 ) { // Don't randomize outer bounds of node because of (future) tiling
vertices[y * Width + x].x += Random.Range( -1.0f, 1.0f ) * yIntensity;
vertices[y * Width + x].z += Random.Range( -1.0f, 1.0f ) * yIntensity;
}
}
}
// Build triangle indices: 3 indices into vertex array for each triangle
int[] triangles = new int[(Height - 1) * (Width - 1) * 6];
int index = 0;
for( y = 0; y < Height-1; y++ ) {
for( x = 0; x < Width-1; x++ ) {
// For each grid cell output two triangles
triangles[index++] = (y * Width) + x;
triangles[index++] = ((y+1) * Width) + x;
triangles[index++] = (y * Width) + x + 1;
triangles[index++] = ((y+1) * Width) + x;
triangles[index++] = ((y+1) * Width) + x + 1;
triangles[index++] = (y * Width) + x + 1;
}
}
mesh.Clear();
mesh.vertices = vertices;
mesh.uv = uv;
mesh.triangles = triangles;
MakeVertsUnique();
}
private ex.FractalNoise noise; // Object of FractalNoise class, namespaced in ex
/**
* This function generates the heightmap and makes the vertices.
* Normals are calculated by the MakeVertsUnique() function.
* Calling this function is required, so there's no need to be save about executing the
* RecalculateNormals() function
*/
public void GenerateHeightmap()
{
noise = new ex.FractalNoise();
noise.SetNoise(offsetX, offsetY, seed);
mesh = GetComponent <MeshFilter>().mesh;
if (!mesh)
{
Debug.Log("Can't find mesh!");
return;
}
if (landMaterial)
{
renderer.material = landMaterial;
}
else
{
renderer.material.color = Color.magenta;
}
Vector3[] vertices = new Vector3[Height * Width];
Vector2[] uv = new Vector2[Height * Width];
Vector2 uvScale = new Vector2(1.0f / (Width - 1), 1.0f / (Height - 1));
Vector3 sizeScale = new Vector3(Size.x / (Width - 1), Size.y, Size.z / (Height - 1));
int y = 0;
int x = 0;
for (y = 0; y < Height; y++)
{
for (x = 0; x < Width; x++)
{
Vector3 vertex = new Vector3(x, noise.GenerateFractal(amplitude, frequency, octaves, (float)x, (float)y, persistence), y);
vertex.y += noise.GeneratePerlin((float)x, (float)y) * yIntensity;
vertices[y * Width + x] = Vector3.Scale(sizeScale, vertex); // Sets the vertex position on the grid
uv[y * Width + x] = Vector2.Scale(new Vector2(x, y), uvScale);
if (y < Height - 1 && y > 0 && x < Width - 1 && x > 0) // Don't randomize outer bounds of node because of (future) tiling
{
vertices[y * Width + x].x += Random.Range(-1.0f, 1.0f) * yIntensity;
vertices[y * Width + x].z += Random.Range(-1.0f, 1.0f) * yIntensity;
}
}
}
// Build triangle indices: 3 indices into vertex array for each triangle
int[] triangles = new int[(Height - 1) * (Width - 1) * 6];
int index = 0;
for (y = 0; y < Height - 1; y++)
{
for (x = 0; x < Width - 1; x++)
{
// For each grid cell output two triangles
triangles[index++] = (y * Width) + x;
triangles[index++] = ((y + 1) * Width) + x;
triangles[index++] = (y * Width) + x + 1;
triangles[index++] = ((y + 1) * Width) + x;
triangles[index++] = ((y + 1) * Width) + x + 1;
triangles[index++] = (y * Width) + x + 1;
}
}
mesh.Clear();
mesh.vertices = vertices;
mesh.uv = uv;
mesh.triangles = triangles;
MakeVertsUnique();
}
