private TerrainPatchComponent CreatePatch(
TerrainEffect terrainEffect,
EffectPipelineStateHandle pipelineStateHandle,
HeightMap heightMap,
BlendTileData blendTileData,
Int32Rect patchBounds,
GraphicsDevice graphicsDevice,
ResourceUploadBatch uploadBatch,
TerrainPatchIndexBufferCache indexBufferCache)
{
var indexBuffer = indexBufferCache.GetIndexBuffer(
patchBounds.Width,
patchBounds.Height,
uploadBatch,
out var indices);
var vertexBuffer = AddDisposable(CreateVertexBuffer(
graphicsDevice,
uploadBatch,
heightMap,
patchBounds,
indices,
out var boundingBox,
out var triangles));
return(new TerrainPatchComponent(
terrainEffect,
pipelineStateHandle,
patchBounds,
vertexBuffer,
indexBuffer,
triangles,
boundingBox));
}
private void CreatePatches(
GraphicsDevice graphicsDevice,
ResourceUploadBatch uploadBatch,
Entity terrainEntity,
HeightMap heightMap,
BlendTileData blendTileData,
TerrainEffect terrainEffect,
EffectPipelineStateHandle pipelineStateHandle,
TerrainPatchIndexBufferCache indexBufferCache)
{
const int numTilesPerPatch = TerrainComponent.PatchSize - 1;
var numPatchesX = heightMap.Width / numTilesPerPatch;
if (heightMap.Width % numTilesPerPatch != 0)
{
numPatchesX += 1;
}
var numPatchesY = heightMap.Height / numTilesPerPatch;
if (heightMap.Height % numTilesPerPatch != 0)
{
numPatchesY += 1;
}
for (var y = 0; y < numPatchesY; y++)
{
for (var x = 0; x < numPatchesX; x++)
{
var patchX = x * numTilesPerPatch;
var patchY = y * numTilesPerPatch;
var patchBounds = new Int32Rect
{
X = patchX,
Y = patchY,
Width = Math.Min(TerrainComponent.PatchSize, heightMap.Width - patchX),
Height = Math.Min(TerrainComponent.PatchSize, heightMap.Height - patchY)
};
terrainEntity.Components.Add(CreatePatch(
terrainEffect,
pipelineStateHandle,
heightMap,
blendTileData,
patchBounds,
graphicsDevice,
uploadBatch,
indexBufferCache));
}
}
}
public void Load(ContentManager Content, string heightMapFileName, float blockScale, float heightScale)
{
if (!isInitialized)
Initialize();
// Load heightMap file
Texture2D heightMapTexture = Content.Load<Texture2D>(heightMapFileName);
int heightMapSize = heightMapTexture.Width*heightMapTexture.Height;
heightMap = new Color[heightMapSize];
heightMapTexture.GetData<Color>(heightMap);
this.vertexCountX = heightMapTexture.Width;
this.vertexCountZ = heightMapTexture.Height;
this.blockScale = blockScale;
this.heightScale = heightScale;
// Generate terrain mesh
GenerateTerrainMesh();
transformation = new Transformation();
// Load effect
effect = new TerrainEffect(Game.Content.Load<Effect>(TerrainEffect.EFFECT_FILENAME));
terrainMaterial = new TerrainMaterial();
// Load vertex declaration once
this.vertexDeclaration = new VertexDeclaration(GraphicsDevice, VertexPositionNormalTangentBinormalTexture.VertexElements);
}
/// <summary>
/// Constructor.
/// </summary>
public TileTerrainEffect(TerrainEffect terrainEffect, bool isAnchor)
{
this.TerrainEffect = terrainEffect;
this.IsAnchor = isAnchor;
}
