/// <summary>
/// Optimized Heightmap, using cells to optimize process of drawing and modifying.
/// The heightmap is divided into cells which are each surrounded by a bounding box and
/// hidden if they are outside of the field of view or too far away. The bounding boxes
/// are also used to speed up the ray detection test when making modifications to the terrain.
/// </summary>
/// <param name="divisions">Size of the map, ex: 256x256</param>
/// <param name="cellsize">The size of a single quad, ex: 50x50</param>
/// <param name="cellDivisions">Number of quads in each heightmap cell, ex: 16x16</param>
public Optimized_Heightmap(GraphicsDevice graphicsDevice, Point divisions, Vector2 cellsize, Point cellDivisions)
{
this.size = divisions;
this.cellSize = cellsize;
this.cellDivisions = cellDivisions;
//basicEffect = new BasicEffect(graphicsDevice, null);
//basicEffect.VertexColorEnabled = true;
effect = Editor.content.Load<Effect>(@"content\shaders\opt_heightmap");
effectParams = new EffectParams(ref effect, "TransformWireframe");
int w = (int)((float)divisions.X / (float)cellDivisions.X);
int h = (int)((float)divisions.Y / (float)cellDivisions.Y);
cell = new HeightmapCell[w, h];
//Build the cells
for (int y = 0; y < w; y++)
{
for (int x = 0; x < h; x++)
{
//get the adjacent cells (max 3) : [0,0],[0,1],[1,0]
HeightmapCell[,] adjacent_cell = new HeightmapCell[2, 2];
if (x > 0) adjacent_cell[0, 1] = cell[x - 1, y];
if (y > 0) adjacent_cell[1, 0] = cell[x, y - 1];
if (x > 0 && y > 0) adjacent_cell[0, 0] = cell[x - 1, y - 1];
cell[x, y] = new HeightmapCell(graphicsDevice, new Point(x, y), cellDivisions, cellsize, adjacent_cell);
}
}
HeightmapCell.Tri collisionTri = cell[0,0].triangle[0];
testTri = new Triangle(collisionTri.p1, collisionTri.p2, collisionTri.p3, Color.White);
}
/// <summary>
/// Optimized Heightmap, using cells to optimize process of drawing and modifying.
/// The heightmap is divided into cells which are each surrounded by a bounding box and
/// hidden if they are outside of the field of view or too far away. The bounding boxes
/// are also used to speed up the ray detection test when making modifications to the terrain.
/// </summary>
/// <param name="divisions">Size of the map, ex: 256x256</param>
/// <param name="cellsize">The size of a single quad, ex: 50x50</param>
/// <param name="cellDivisions">Number of quads in each heightmap cell, ex: 16x16</param>
public Optimized_Heightmap(GraphicsDevice graphicsDevice, Point divisions, Vector2 cellsize, Point cellDivisions)
{
this.size = divisions;
this.cellSize = cellsize;
this.cellDivisions = cellDivisions;
//basicEffect = new BasicEffect(graphicsDevice, null);
//basicEffect.VertexColorEnabled = true;
effect = Editor.content.Load <Effect>(@"content\shaders\opt_heightmap");
effectParams = new EffectParams(ref effect, "TransformWireframe");
int w = (int)((float)divisions.X / (float)cellDivisions.X);
int h = (int)((float)divisions.Y / (float)cellDivisions.Y);
cell = new HeightmapCell[w, h];
//Build the cells
for (int y = 0; y < w; y++)
{
for (int x = 0; x < h; x++)
{
//get the adjacent cells (max 3) : [0,0],[0,1],[1,0]
HeightmapCell[,] adjacent_cell = new HeightmapCell[2, 2];
if (x > 0)
{
adjacent_cell[0, 1] = cell[x - 1, y];
}
if (y > 0)
{
adjacent_cell[1, 0] = cell[x, y - 1];
}
if (x > 0 && y > 0)
{
adjacent_cell[0, 0] = cell[x - 1, y - 1];
}
cell[x, y] = new HeightmapCell(graphicsDevice, new Point(x, y), cellDivisions, cellsize, adjacent_cell);
}
}
HeightmapCell.Tri collisionTri = cell[0, 0].triangle[0];
testTri = new Triangle(collisionTri.p1, collisionTri.p2, collisionTri.p3, Color.White);
}
public HeightmapCell(GraphicsDevice graphicsDevice, Point coordinates, Point divisions, Vector2 cellsize, HeightmapCell[,] adjacent_cell)
{
this.coordinates = coordinates;
this.divisions = divisions;
this.cellsize = cellsize;
this.adjacent_cell = adjacent_cell;
position = new Vector3();
position.X = coordinates.X * divisions.X * cellsize.X - cellsize.X * coordinates.X;
position.Z = coordinates.Y * divisions.Y * cellsize.Y - cellsize.Y * coordinates.Y;
center.X = position.X + (divisions.X * cellsize.X - cellsize.X) / 2;
center.Z = position.Z + (divisions.Y * cellsize.Y - cellsize.Y) / 2;
SetUpVertices(graphicsDevice);
//SetupTilingRefs();
UpdateAdjacentCells();
SetVertexBuffer(graphicsDevice, null);
SetUpIndices();
SetIndexBuffer(graphicsDevice);
Update();
}