public Triangle(Triangle parent, Vector2 tPoint, Vector2 lPoint, Vector2 rPoint, AdaptativeHeightmap map)
{
//Crea el triángulo
this.map = map;
int resolution = map.HeightmapData.GetLength(0);
this.tInd = (int)(tPoint.X + tPoint.Y * resolution);
this.lInd = (int)(lPoint.X + lPoint.Y * resolution);
this.rInd = (int)(rPoint.X + rPoint.Y * resolution);
this.lPos = new Vector3(map.Position.X + lPoint.X * map.ScaleXZ, map.Position.Y + map.HeightmapData[(int)lPoint.X, (int)lPoint.Y] * map.ScaleY, map.Position.Z + lPoint.Y * map.ScaleXZ);
//centro: promedio de cada componente
Vector2 center = new Vector2((lPoint.X + rPoint.X) / 2, (lPoint.Y + rPoint.Y) / 2);
this.centerPos = new Vector3(map.Position.X + center.X * map.ScaleXZ, map.Position.Y + map.HeightmapData[(int)center.X, (int)center.Y] * map.ScaleY, map.Position.Z + center.Y * map.ScaleXZ);
this.parent = parent;
//Splitea el triángulo hasta que queden triángulos medianamente chicos
//(para dejar el árbol armado con la mayor calidad posible)
if (Vector2Distance(lPoint, tPoint) > 1) {
this.lChild = new Triangle(this, center, tPoint, lPoint, map);
this.rChild = new Triangle(this, center, rPoint, tPoint, map);
}
}
public void addNeighs(Triangle lNeigh, Triangle rNeigh, Triangle bNeigh)
{
//Agrega referencias a los vecinos
this.lNeigh = lNeigh;
this.rNeigh = rNeigh;
this.bNeigh = bNeigh;
//Encuentra y asigna las referencias a vecinos de sus hijos
if (lChild != null) {
Triangle bNeighRightChild = null;
Triangle bNeighLeftChild = null;
Triangle lNeighRightChild = null;
Triangle rNeighLeftChild = null;
if (bNeigh != null) {
bNeighLeftChild = bNeigh.lChild;
bNeighRightChild = bNeigh.rChild;
}
if (lNeigh != null)
lNeighRightChild = lNeigh.rChild;
if (rNeigh != null)
rNeighLeftChild = rNeigh.lChild;
lChild.addNeighs(rChild, bNeighRightChild, lNeighRightChild);
rChild.addNeighs(bNeighLeftChild, lChild, rNeighLeftChild);
}
}
public void loadHeightmap(string heightmapPath, Vector3 center)
{
var d3dDevice = Gui.I.D3dDevice;
//Dispose de vb y ib si había
if (vbTerrain != null && !vbTerrain.Disposed) {
vbTerrain.Dispose();
}
if (ibTerrain != null && !ibTerrain.Disposed) {
ibTerrain.Dispose();
}
//Cargar heightmap
lastHeightmapPath = heightmapPath;
HeightmapData = loadHeightmapValues(d3dDevice, heightmapPath);
totalVertices = 2 * 3 * (HeightmapData.GetLength(0) - 1) * (HeightmapData.GetLength(1) - 1); //por cada puntito tengo dos triángulos de 3 vértices
int width = HeightmapData.GetLength(0);
int length = HeightmapData.GetLength(1);
//Convertir de centro a esquina
this.Position = center - new Vector3(width * ScaleXZ / 2, Position.Y, length * ScaleXZ / 2);
//Crear vértices y bajarlos al VertexBuffer
updateVertices();
//Crear los dos triángulos root, el piso
float terrainSize = width - 1;
Triangle leftTriangle = new Triangle(null, new Vector2(0, 0), new Vector2(terrainSize, 0), new Vector2(0, terrainSize), this);
Triangle rightTriangle = new Triangle(null, new Vector2(terrainSize, terrainSize), new Vector2(0, terrainSize), new Vector2(terrainSize, 0), this);
leftTriangle.addNeighs(null, null, rightTriangle);
rightTriangle.addNeighs(null, null, leftTriangle);
//Inicializar listas de triángulos e índices
this.triangleList = new List<Triangle>();
triangleList.Add(leftTriangle);
triangleList.Add(rightTriangle);
this.indicesList = new List<int>();
foreach (Triangle t in triangleList) {
t.addIndices(ref indicesList);
}
//Bajar índices al IndexBuffer
this.ibTerrain = new IndexBuffer(typeof(int), totalVertices, d3dDevice, Usage.WriteOnly, Pool.Default);
ibTerrain.SetData(indicesList.ToArray(), 0, LockFlags.None);
}
