/// <summary>
/// Default constructor
/// </summary>
public PlanetHomogenousProceduralTerrainTemplate( )
{
// TerrainFunction heightFunction = new TerrainFunction( TerrainFunctionType.RidgedFractal );
// FractalTerrainParameters parameters = ( FractalTerrainParameters )heightFunction.Parameters;
TerrainFunction heightFunction = new TerrainFunction( TerrainFunctionType.Flat );
m_HeightFunction = heightFunction;
}
public TerrainPrimitive(GraphicsDevice device, TerrainFunction function)
{
heights = new float[100, 100];
for (int i = 0; i < 100; i++)
{
for (int e = 0; e < 100; e++)
{
heights[i, e] = function(i, e);
}
}
Vector3[] neighbour = new Vector3[4];
for (int i = 0; i < 100; i++)
{
for (int e = 0; e < 100; e++)
{
Vector3 pos = new Vector3(i, heights[i, e], e);
if (i > 0)
{
neighbour[0] = new Vector3(i - 1, heights[i - 1, e], e);
}
else
{
neighbour[0] = pos;
}
if (e > 0)
{
neighbour[1] = new Vector3(i, heights[i, e - 1], e - 1);
}
else
{
neighbour[1] = pos;
}
if (i < 99)
{
neighbour[2] = new Vector3(i + 1, heights[i + 1, e], e);
}
else
{
neighbour[2] = pos;
}
if (e < 99)
{
neighbour[3] = new Vector3(i, heights[i, e + 1], e + 1);
}
else
{
neighbour[3] = pos;
}
Vector3 normal = Vector3.Zero;
normal += Vector3.Cross(neighbour[1] - pos, neighbour[0] - pos);
normal += Vector3.Cross(neighbour[2] - pos, neighbour[1] - pos);
normal += Vector3.Cross(neighbour[3] - pos, neighbour[2] - pos);
normal += Vector3.Cross(neighbour[0] - pos, neighbour[3] - pos);
normal.Normalize();
this.AddVertex(new Vector3(i, heights[i, e], e), normal);
}
}
for (int i = 1; i < 100; i++)
{
for (int e = 1; e < 100; e++)
{
this.AddIndex((i - 1) * 100 + e);
this.AddIndex(i * 100 + (e - 1));
this.AddIndex(i * 100 + e);
this.AddIndex(i * 100 + (e - 1));
this.AddIndex((i - 1) * 100 + e);
this.AddIndex((i - 1) * 100 + (e - 1));
}
}
this.InitializePrimitive(device);
}
public TerrainPrimitive(GraphicsDevice device,TerrainFunction function)
{
heights = new float[100,100];
for (int i = 0; i < 100; i++)
{
for (int e = 0; e < 100; e++)
{
heights[i,e]=function(i,e);
}
}
Vector3[] neighbour = new Vector3[4];
for (int i = 0; i < 100; i++)
{
for (int e = 0; e < 100; e++)
{
Vector3 pos = new Vector3(i, heights[i,e], e);
if (i > 0) neighbour[0] = new Vector3(i - 1, heights[i - 1,e], e);
else neighbour[0] = pos;
if (e > 0) neighbour[1] = new Vector3(i, heights[i,e - 1], e - 1);
else neighbour[1] = pos;
if (i < 99) neighbour[2] = new Vector3(i +1, heights[i + 1,e], e);
else neighbour[2] = pos;
if (e < 99) neighbour[3] = new Vector3(i, heights[i,e+1], e+1);
else neighbour[3] = pos;
Vector3 normal = Vector3.Zero;
normal += Vector3.Cross(neighbour[1] - pos, neighbour[0] - pos);
normal += Vector3.Cross(neighbour[2] - pos, neighbour[1] - pos);
normal += Vector3.Cross(neighbour[3] - pos, neighbour[2] - pos);
normal += Vector3.Cross(neighbour[0] - pos, neighbour[3] - pos);
normal.Normalize();
this.AddVertex(new Vector3(i, heights[i,e], e), normal);
}
}
for (int i = 1; i < 100; i++)
{
for (int e = 1; e < 100; e++)
{
this.AddIndex((i - 1) * 100 + e);
this.AddIndex(i * 100 + (e - 1));
this.AddIndex(i * 100 + e);
this.AddIndex(i * 100 + (e - 1));
this.AddIndex((i - 1) * 100 + e);
this.AddIndex((i - 1) * 100 + (e - 1));
}
}
this.InitializePrimitive(device);
}
void UpdateTerrain()
{
mesh = new Mesh();
Vector3[] vertices = new Vector3[NofTiles * NofTiles * 4];
Color32[] colors = new Color32[NofTiles * NofTiles * 4];
int[] triangles = new int[NofTiles * NofTiles * 6];
TerrainParameter terrainParameter;
terrainParameter.nofTiles = NofTiles;
terrainParameter.nofPatches = NofPatches;
terrainParameter.weight1 = weight1;
terrainParameter.weight2 = weight2;
terrainParameter.weight3 = weight3;
terrainParameter.weight4 = weight4;
terrainParameter.seaLevel = seaLevel;
TerrainFunction terrainFunction = new TerrainFunction();
terrainFunction.Create(terrainParameter);
float x0 = -(NofTiles * TileSize / 2f);
float z0 = x0;
float dx = TileSize;
float dz = dx;
float[,] vertexElevations = terrainFunction.VertexElevations;
float z = z0;
for (int v = 0; v < terrainParameter.nofTiles; ++v)
{
float x = x0;
for (int u = 0; u < terrainParameter.nofTiles; ++u)
{
float y1 = vertexElevations [u, v] * maxHeight;
float y2 = vertexElevations [u + 1, v] * maxHeight;
float y3 = vertexElevations [u + 1, v + 1] * maxHeight;
float y4 = vertexElevations [u, v + 1] * maxHeight;
int vertexBaseAddress = NofTiles * v * 4;
vertices [vertexBaseAddress + u * 4] = new Vector3(x, y1, z); // Bottom left (0)
vertices [vertexBaseAddress + u * 4 + 1] = new Vector3(x + dx, y2, z); // Bottom right (1)
vertices [vertexBaseAddress + u * 4 + 2] = new Vector3(x + dx, y3, z + dz); // Top right (2)
vertices [vertexBaseAddress + u * 4 + 3] = new Vector3(x, y4, z + dz); // Top left (3)
Color32 color = terrainFunction.TileColors [u, v];
colors [vertexBaseAddress + u * 4] = color;
colors [vertexBaseAddress + u * 4 + 1] = color;
colors [vertexBaseAddress + u * 4 + 2] = color;
colors [vertexBaseAddress + u * 4 + 3] = color;
int triangleBaseAddress = NofTiles * v * 6;
// Lower left triangle
triangles [triangleBaseAddress + u * 6] = vertexBaseAddress + u * 4; // (0)
triangles [triangleBaseAddress + u * 6 + 1] = vertexBaseAddress + u * 4 + 2; // (2)
triangles [triangleBaseAddress + u * 6 + 2] = vertexBaseAddress + u * 4 + 1; // (1)
// Upper right triangle
triangles [triangleBaseAddress + u * 6 + 3] = vertexBaseAddress + u * 4 + 2; // (2)
triangles [triangleBaseAddress + u * 6 + 4] = vertexBaseAddress + u * 4; // (0)
triangles [triangleBaseAddress + u * 6 + 5] = vertexBaseAddress + u * 4 + 3; // (3)
x += dx;
} // x
z += dz;
} // z
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.colors32 = colors;
// By setting a larger bound than geometrically required we prevent
// the discarding of triangles out of the view frustum, specifically
// when the player crosses the northern boundary of the map
// @todo Fix bounds (calculate them)
Bounds bounds = new Bounds(Vector2.zero, new Vector3(100, 200, 200));
mesh.bounds = bounds;
mesh.RecalculateNormals();
}
/// <summary>
/// Sets up the terrain functions
/// </summary>
/// <param name="heightFunction">The terrain height function</param>
/// <param name="groundFunction">The terrain ground offset function</param>
public void SetupTerrain( TerrainFunction heightFunction, TerrainFunction groundFunction )
{
if ( Planet == null )
{
throw new InvalidOperationException( "Terrain model does not have an associated planet. Cannot setup terrain" );
}
float radius = SpherePlanet.PlanetModel.Radius.ToRenderUnits;
float height = MaximumHeight.ToRenderUnits;
// NOTE: AP: Patch scale is irrelevant, because vertices are projected onto the function sphere anyway
m_Gen = new TerrainGenerator( TerrainGeometry.Sphere, heightFunction, groundFunction );
m_Gen.Setup( 1024, radius, radius + height );
m_Gen.SetSmallestStepSize( MinimumStepSize, MinimumStepSize );
OnModelChanged( false, true );
}
/// <summary>
/// Sets up the terrain functions
/// </summary>
/// <param name="heightFunction">The terrain height function</param>
/// <param name="groundFunction">The terrain ground offset function</param>
public void SetupTerrain( TerrainFunction heightFunction, TerrainFunction groundFunction )
{
if ( PlanetModel == null )
{
throw new InvalidOperationException( "Terrain model does not have an associated planet. Cannot setup terrain" );
}
float height = MaximumHeight.ToRenderUnits;
m_Gen = new TerrainGenerator( TerrainGeometry.Plane, heightFunction, groundFunction );
m_Gen.Setup( 1024, 0, height );
m_Gen.SetSmallestStepSize( 0.001f, 0.001f );
OnModelChanged( );
}
