/// <summary>
/// Initialises a new instance of the TerrainPoint class.
/// </summary>
/// <param name="foreground">The density of the foreground.</param>
/// <param name="background">The density of the background.</param>
/// <param name="material">The material.</param>
/// <param name="light">The light value.</param>
public TerrainPoint(byte foreground, byte background, TerrainMaterial material, Colour light)
{
this.Foreground = foreground;
this.Background = background;
this.Material = material;
this.Light = light;
}
/// <summary>
/// Creates a new chunk.
/// </summary>
/// <param name="chunk">The chunk.</param>
/// <param name="surfaceHeights">The surface heights.</param>
public void GeneratePoints(TerrainChunk chunk, float[] surfaceHeights)
{
int originX = chunk.Index.X * Metrics.ChunkWidth;
int originY = chunk.Index.Y * Metrics.ChunkHeight;
SurfacePosition? surfacePosition = null;
for (int x = 0; x < Metrics.ChunkWidth; x++)
{
// Determine where the surface lies for this x position
float surface = surfaceHeights[x];
// Update the on-going check for the surface position
surfacePosition = this.CheckSurfacePosition(surfacePosition, surface, originY);
for (int y = 0; y < Metrics.ChunkHeight; y++)
{
int worldX = originX + x;
int worldY = originY + y;
// Calculate the background and foreground densities
byte background = this.GetBackgroundDensity(worldX, worldY, surface);
// Get the cave densities for this point
PointDensities densities = this.GetCaveDensitiesForPoint(worldX, worldY);
if (densities.Origin < background)
{
// The density cannot be less than the background (ie. if the background is dug out, the
// foreground cannot be filled in)
densities.Origin = background;
}
// Update the densities
byte foreground = densities.Origin > background ? densities.Origin : background;
this.UpdateForegroundIfGreaterDensity(chunk, x, y, foreground);
if (x < Metrics.ChunkWidth - 1)
{
this.UpdateForegroundIfGreaterDensity(chunk, x + 1, y, densities.Right);
}
if (y < Metrics.ChunkHeight - 1)
{
this.UpdateForegroundIfGreaterDensity(chunk, x, y + 1, densities.Up);
}
// Determine the material
TerrainMaterial material = this.GetMaterial(worldX, worldY, surface);
// TODO: Remove this
int val = 255 - (int)(System.Math.Abs((float)worldY) * 8);
byte lightTest = val > 0 ? (byte)val : (byte)0;
var light = new Colour(lightTest, lightTest, lightTest);
// TODO: Remove this
// Update the point
TerrainPoint point = chunk.Points[x, y];
point.Background = background;
point.Material = material;
point.Light = light;
}
}
chunk.SurfacePosition = surfacePosition.Value;
}
