public TerrainChunk(GraphicsDevice graphicsDevice, HeightProvider heightProvider, Vector2 gridCoordinates, NoiseProvider decorNoiseProvider)
{
_gridTriangles = new List <GridTriangle>();
GridCoordinates = gridCoordinates;
CalculateContents(graphicsDevice, heightProvider, decorNoiseProvider);
}
public World(GraphicsDevice graphicsDevice, HeightProvider heightProvider, DirectionLight light, NoiseProvider decorNoiseProvider)
{
_graphicsDevice = graphicsDevice;
_heightProvider = heightProvider;
_decorNoiseProvider = decorNoiseProvider;
_newTerrainChunks = new List <TerrainChunk>();
TerrainChunks = new List <TerrainChunk>();
Light = light;
}
private void CalculateContents(GraphicsDevice graphicsDevice, HeightProvider heightProvider, NoiseProvider decorNoiseProvider)
{
float centreXWorld = GridCoordinates.X * EdgeLength;
float centreZWorld = GridCoordinates.Y * EdgeLength;
Vector3 min = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
Vector3 max = new Vector3(float.MinValue, float.MinValue, float.MinValue);
List <TerrainVertex> resultVertices = new List <TerrainVertex>();
for (int z = 0; z < VerticesPerEdge; z++)
{
for (int x = 0; x < VerticesPerEdge; x++)
{
float positionXLocal = x * VertexSpacing - HalfEdgeLength;
float positionZLocal = z * VertexSpacing - HalfEdgeLength;
float positionXWorld = positionXLocal + centreXWorld;
float positionZWorld = positionZLocal + centreZWorld;
Vector3 position = new Vector3(positionXWorld, heightProvider.GetHeight(positionXWorld, positionZWorld), positionZWorld);
Vector3 normal = heightProvider.GetNormalFromFiniteOffset(positionXWorld, positionZWorld);
Vector2 textureCoordinates = new Vector2(positionXLocal, positionZLocal) / HalfEdgeLength;
Vector2 textureCoordinatesDetail = new Vector2(positionXLocal, positionZLocal) * 2 / HalfEdgeLength;
TerrainVertex vertex = new TerrainVertex(position, normal, textureCoordinates, textureCoordinatesDetail);
resultVertices.Add(vertex);
min = Vector3.Min(min, position);
max = Vector3.Max(max, position);
}
}
TerrainVertex[] resultVerticesData = resultVertices.ToArray();
VertexBuffer = new VertexBuffer(graphicsDevice, TerrainVertex.VertexDeclaration, resultVerticesData.Length, BufferUsage.WriteOnly);
VertexBuffer.SetData(resultVerticesData);
// Populate grid triangles
_gridTriangles.Clear();
for (int z = 0; z < VerticesPerEdge - 1; z++)
{
for (int x = 0; x < VerticesPerEdge - 1; x++)
{
int baseIndexPosition = (x + z * (VerticesPerEdge - 1)) * 6;
_gridTriangles.Add(new GridTriangle(resultVerticesData[Indices[baseIndexPosition]].Position, resultVerticesData[Indices[baseIndexPosition + 1]].Position, resultVerticesData[Indices[baseIndexPosition + 2]].Position));
_gridTriangles.Add(new GridTriangle(resultVerticesData[Indices[baseIndexPosition + 3]].Position, resultVerticesData[Indices[baseIndexPosition + 4]].Position, resultVerticesData[Indices[baseIndexPosition + 5]].Position));
}
}
// Include water tile vertices in bounding box
for (int z = -1; z <= 1; z += 2)
{
for (int x = -1; x <= 1; x += 2)
{
Vector3 waterTileVertexPosition = new Vector3(centreXWorld + x * HalfEdgeLength, 0, centreZWorld + z * HalfEdgeLength);
min = Vector3.Min(min, waterTileVertexPosition);
max = Vector3.Max(max, waterTileVertexPosition);
}
}
BoundingBox = new BoundingBox(min, max);
// Fill decor according to procedural inputs
_decorRandom = new Random(GridCoordinates.GetHashCode());
DecorItems = new List <DecorItem>();
for (int z = 0; z < DecorGridSize; z++)
{
for (int x = 0; x < DecorGridSize; x++)
{
float decorCentreXWorld = centreXWorld - HalfEdgeLength + HalfDecorTileEdgeLength + x * DecorTileEdgeLength + (float)(2 * _decorRandom.NextDouble() - 1) * HalfDecorTileEdgeLength;
float decorCentreZWorld = centreZWorld - HalfEdgeLength + HalfDecorTileEdgeLength + z * DecorTileEdgeLength + (float)(2 * _decorRandom.NextDouble() - 1) * HalfDecorTileEdgeLength;
float?decorHeight = GetGridHeight(new Vector3(decorCentreXWorld, 0, decorCentreZWorld));
if (decorHeight.HasValue && decorHeight.Value > 5)
{
if (decorNoiseProvider.GetValue(decorCentreXWorld, decorCentreZWorld) > 0.9f)
{
DecorItems.Add(new DecorItem(new Vector3(decorCentreXWorld, decorHeight.Value, decorCentreZWorld), (float)(_decorRandom.NextDouble() * 2 * Math.PI)));
}
}
}
}
}