public PatchROAM(LandscapeROAM landscape, Camera cam, int heightX, int heightY, int worldX, int worldY, int patchSize, int mapSize)
{
this.landscape = landscape;
this.cam = cam;
this.varianceDepth = 8;
this.patchSize = patchSize;
this.mapSize = mapSize;
// Clear all the relationships
m_BaseLeft = new TriTreeNode();
m_BaseRight = new TriTreeNode();
m_BaseLeft.setBaseNeighbor(m_BaseRight);
m_BaseRight.setBaseNeighbor(m_BaseLeft);
// Store Patch offsets for the world and heightmap.
this.worldX = worldX;
this.worldY = worldY;
// Store pointer to first byte of the height data for this patch.
this.heightX = heightX;
this.heightY = heightY;
// Initialize flags
m_VarianceDirty = 1;
m_isVisible = 0;
m_VarianceLeft = new ushort[1 << (varianceDepth)]; // Left variance tree
m_VarianceRight = new ushort[1 << (varianceDepth)]; // Right variance tree
Vector3 center = new Vector3(worldX + patchSize / 2, 0.0f, -worldY - patchSize / 2);
bs = new BoundingSphere(center, patchSize);
}
// ---------------------------------------------------------------------
// Reset the patch.
//
public void reset()
{
// Assume patch is not visible.
m_isVisible = 0;
// Reset the important relationships
m_BaseLeft.setLeftChild(null);
m_BaseLeft.setRightChild(null);
m_BaseRight.setLeftChild(null);
m_BaseLeft.setLeftChild(null);
// Attach the two m_Base triangles together
m_BaseLeft.setBaseNeighbor(m_BaseRight);
m_BaseRight.setBaseNeighbor(m_BaseLeft);
// Clear the other relationships.
m_BaseLeft.setRightNeighbor(null);
m_BaseLeft.setLeftNeighbor(null);
m_BaseRight.setRightNeighbor(null);
m_BaseRight.setLeftNeighbor(null);
}
