| public GetHeightAtPosition ( float X, float Z ) : float | ||
| X | float | |
| Z | float | |
| return | float | |
//public float GetHeightAtPosition2(float X, float Z)
//{
// if (X > -512 && X < 0 && Z > -512 && Z < 0)
// return clamp(terrain[3].GetHeightAtPosition(X, Z));
// else if (X > -512 && X < 0 && Z > 0 && Z < 512)
// return clamp(terrain[1].GetHeightAtPosition(X, Z));
// else if (X > -0 && X < 512 && Z > 0 && Z < 512)
// return clamp(terrain[0].GetHeightAtPosition(X, Z));
// else
// return clamp(terrain[2].GetHeightAtPosition(X, Z));
//}
public float GetHeightAtPosition(float X, float Z)
{
float steepness;
//if (Constants.NUM_OF_TERRAINS == 1)
return(clamp(terrain.GetHeightAtPosition(X, Z, out steepness)));
//if (X > -512 * Constants.TERRAIN_CELL_SIZE && X < 0 &&
// Z > -512 * Constants.TERRAIN_CELL_SIZE && Z < 0)
// return clamp(terrain[3].GetHeightAtPosition(X, Z, out steepness));
//else if (X > -512 * Constants.TERRAIN_CELL_SIZE && X < 0 &&
// Z > 0 && Z < 512 * Constants.TERRAIN_CELL_SIZE)
// return clamp(terrain[1].GetHeightAtPosition(X, Z, out steepness));
//else if (X >= 0 && X < 512 * Constants.TERRAIN_CELL_SIZE &&
// Z >= 0 && Z < 512 * Constants.TERRAIN_CELL_SIZE)
// return clamp(terrain[0].GetHeightAtPosition(X, Z, out steepness));
//else if (X >= 0 && X < 512 * Constants.TERRAIN_CELL_SIZE &&
// Z > -512 * Constants.TERRAIN_CELL_SIZE && Z < 0)
// return clamp(terrain[2].GetHeightAtPosition(X, Z, out steepness));
//else
// return 0;
//return clamp(terrain[0].GetHeightAtPosition(X, Z, out steepness)) ;
}
// Called when the game should load its content
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
camera = new FreeCamera(new Vector3(8000, 6000, 8000),
MathHelper.ToRadians(45),
MathHelper.ToRadians(-30),
GraphicsDevice);
terrain = new Terrain(Content.Load <Texture2D>("terrain"), 30, 4800,
Content.Load <Texture2D>("grass"), 6, new Vector3(1, -1, 0),
GraphicsDevice, Content);
terrain.WeightMap = Content.Load <Texture2D>("weightMap");
terrain.RTexture = Content.Load <Texture2D>("sand");
terrain.GTexture = Content.Load <Texture2D>("rock");
terrain.BTexture = Content.Load <Texture2D>("snow");
terrain.DetailTexture = Content.Load <Texture2D>("noise_texture");
// Positions where trees should be drawn
List <Vector3> treePositions = new List <Vector3>();
// Continue until we get 500 trees on the terrain
for (int i = 0; i < 500; i++) // 500
{
// Get X and Z coordinates from the random generator, between
// [-(terrain width) / 2 * (cell size), (terrain width) / 2 * (cell size)]
float x = r.Next(-256 * 30, 256 * 30);
float z = r.Next(-256 * 30, 256 * 30);
// Get the height and steepness of this position on the terrain,
// taking the height of the billboard into account
float steepness;
float y = terrain.GetHeightAtPosition(x, z, out steepness) + 100;
// Reject this position if it is too low, high, or steep. Otherwise
// add it to the list
if (steepness < MathHelper.ToRadians(15) && y > 2300 && y < 3200)
{
treePositions.Add(new Vector3(x, y, z));
}
else
{
i--;
}
}
trees = new BillboardSystem(GraphicsDevice, Content,
Content.Load <Texture2D>("tree_billboard"), new Vector2(200),
treePositions.ToArray());
trees.Mode = BillboardSystem.BillboardMode.Cylindrical;
trees.EnsureOcclusion = true;
// List of positions to place grass billboards
List <Vector3> grassPositions = new List <Vector3>();
// Retrieve pixel grid from grass map
Texture2D grassMap = Content.Load <Texture2D>("grass_map");
Color[] grassPixels = new Color[grassMap.Width * grassMap.Height];
grassMap.GetData <Color>(grassPixels);
// Loop until 1000 billboards have been placed
for (int i = 0; i < 300; i++)
{
// Get X and Z coordinates from the random generator, between
// [-(terrain width) / 2 * (cell size), (terrain width) / 2 * (cell size)]
float x = r.Next(-256 * 30, 256 * 30);
float z = r.Next(-256 * 30, 256 * 30);
// Get corresponding coordinates in grass map
int xCoord = (int)(x / 30) + 256;
int zCoord = (int)(z / 30) + 256;
// Get value between 0 and 1 from grass map
float texVal = grassPixels[zCoord * 512 + xCoord].R / 255f;
// Retrieve height
float steepness;
float y = terrain.GetHeightAtPosition(x, z, out steepness) + 50;
// Randomly place a billboard here based on pixel color in grass
// map
if ((int)((float)r.NextDouble() * texVal * 10) == 1)
{
grassPositions.Add(new Vector3(x, y, z));
}
else
{
i--;
}
}
// Create grass billboard system
grass = new BillboardSystem(GraphicsDevice, Content,
Content.Load <Texture2D>("grass_billboard"), new Vector2(100),
grassPositions.ToArray());
grass.Mode = BillboardSystem.BillboardMode.Cylindrical;
grass.EnsureOcclusion = false;
List <Vector3> cloudPositions = new List <Vector3>();
// Create 20 "clusters" of clouds
for (int i = 0; i < 20; i++)
{
Vector3 cloudLoc = new Vector3(
r.Next(-8000, 8000),
r.Next(4000, 6000),
r.Next(-8000, 8000));
// Add 10 cloud billboards around each cluster point
for (int j = 0; j < 10; j++)
{
cloudPositions.Add(cloudLoc +
new Vector3(
r.Next(-3000, 3000),
r.Next(-300, 900),
r.Next(-1500, 1500)));
}
}
clouds = new BillboardSystem(GraphicsDevice, Content,
Content.Load <Texture2D>("cloud2"), new Vector2(2000),
cloudPositions.ToArray());
clouds.Mode = BillboardSystem.BillboardMode.Spherical;
clouds.EnsureOcclusion = false;
sky = new SkySphere(Content, GraphicsDevice,
Content.Load <TextureCube>("clouds"));
water = new Water(Content, GraphicsDevice,
new Vector3(0, 1600, 0), new Vector2(256 * 30));
water.Objects.Add(sky);
water.Objects.Add(terrain);
lastMouseState = Mouse.GetState();
}
