public static Texture CreateTexture([NotNull] this Heightmap heightmap, GraphicsDevice device)
{
if (heightmap == null)
{
throw new ArgumentNullException(nameof(heightmap));
}
if (device == null || !heightmap.IsValidSize())
{
return(null);
}
switch (heightmap.HeightType)
{
case HeightfieldTypes.Float:
return(Texture.New2D(device, heightmap.Size.X, heightmap.Size.Y, PixelFormat.R32_Float, heightmap.Floats));
case HeightfieldTypes.Short:
return(Texture.New2D(device, heightmap.Size.X, heightmap.Size.Y, PixelFormat.R16_SNorm, heightmap.Shorts));
case HeightfieldTypes.Byte:
return(Texture.New2D(device, heightmap.Size.X, heightmap.Size.Y, PixelFormat.R8_UNorm, heightmap.Bytes));
default:
return(null);
}
}
public static bool IsValid([NotNull] this Heightmap heightmap)
{
if (heightmap == null)
{
throw new ArgumentNullException(nameof(heightmap));
}
bool IsValidHeights()
{
var length = heightmap.Size.X * heightmap.Size.Y;
switch (heightmap.HeightType)
{
case HeightfieldTypes.Float when heightmap.Floats != null && heightmap.Floats.Length == length:
return(true);
case HeightfieldTypes.Short when heightmap.Shorts != null && heightmap.Shorts.Length == length:
return(true);
case HeightfieldTypes.Byte when heightmap.Bytes != null && heightmap.Bytes.Length == length:
return(true);
}
return(false);
}
return(HeightmapUtils.CheckHeightParameters(heightmap.Size, heightmap.HeightType, heightmap.HeightRange, heightmap.HeightScale, false) &&
IsValidHeights());
}
public static Texture CreateTexture([NotNull] this Heightmap heightmap, GraphicsDevice device)
{
if (heightmap == null)
{
throw new ArgumentNullException(nameof(heightmap));
}
if (device == null || !heightmap.IsValid())
{
return(null);
}
var min = heightmap.HeightRange.X / heightmap.HeightScale;
var max = heightmap.HeightRange.Y / heightmap.HeightScale;
switch (heightmap.HeightType)
{
case HeightfieldTypes.Float:
return(Texture.New2D(device, heightmap.Size.X, heightmap.Size.Y, PixelFormat.R8_UNorm, HeightmapUtils.ConvertToByteHeights(heightmap.Floats, min, max)));
case HeightfieldTypes.Short:
return(Texture.New2D(device, heightmap.Size.X, heightmap.Size.Y, PixelFormat.R8_UNorm,
heightmap.Shorts.Select((h) => (byte)MathUtil.Clamp(MathUtil.Lerp(byte.MinValue, byte.MaxValue, MathUtil.InverseLerp(min, max, h)), byte.MinValue, byte.MaxValue)).ToArray()));
case HeightfieldTypes.Byte:
return(Texture.New2D(device, heightmap.Size.X, heightmap.Size.Y, PixelFormat.R8_UNorm,
heightmap.Bytes.Select((h) => (byte)MathUtil.Clamp(MathUtil.Lerp(byte.MinValue, byte.MaxValue, MathUtil.InverseLerp(min, max, h)), byte.MinValue, byte.MaxValue)).ToArray()));
default:
return(null);
}
}
public static Heightmap Create <T>(Int2 size, HeightfieldTypes heightType, Vector2 heightRange, float heightScale, T[] data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
HeightmapUtils.CheckHeightParameters(size, heightType, heightRange, heightScale, true);
var length = size.X * size.Y;
switch (data)
{
case float[] floats when floats.Length == length: break;
case short[] shorts when shorts.Length == length: break;
case byte[] bytes when bytes.Length == length: break;
default: throw new ArgumentException($"{ typeof(T[]) } is not supported in { heightType } height type. Or { nameof(data) }.{ nameof(data).Length } doesn't match { nameof(size) }.");
}
var heightmap = new Heightmap
{
HeightType = heightType,
Size = size,
HeightRange = heightRange,
HeightScale = heightScale,
Floats = data as float[],
Shorts = data as short[],
Bytes = data as byte[],
};
return(heightmap);
}
public static bool IsValidSize([NotNull] this Heightmap heightmap)
{
if (heightmap == null)
{
throw new ArgumentNullException(nameof(heightmap));
}
return(heightmap.Size.X >= 2 && heightmap.Size.Y >= 2);
}
