private void Apply(InstancedModel model)
{
if (model == null || Texture == null)
{
return;
}
var random = new Random(Seed);
var transforms = new List <Matrix>();
var texture = ContentPipeline.LoadContent <Texture2DContent>(Texture.Filename, new Microsoft.Xna.Framework.Content.Pipeline.TextureImporter());
texture.ConvertBitmapType(typeof(PixelBitmapContent <float>));
var map = (PixelBitmapContent <float>)texture.Mipmaps[0];
for (int z = 0; z < map.Height; z++)
{
for (int x = 0; x < map.Width; ++x)
{
var probability = map.GetPixel(x, z) * Density * 0.0001 * Step * Step;
var count = (int)Math.Floor(probability);
if (random.NextDouble() < probability - count)
{
count++;
}
for (int i = 0; i < count; ++i)
{
var xx = random.NextDouble();
var zz = random.NextDouble();
Matrix transform = new Matrix();
transform.M11 = transform.M33 = HorizontalScale.Min + (float)random.NextDouble() * (HorizontalScale.Max - HorizontalScale.Min);
transform.M22 = VerticalScale.Min + (float)random.NextDouble() * (VerticalScale.Max - VerticalScale.Min);
transform.M44 = 1;
if (RandomizeRotation)
{
Matrix rotation;
Matrix.CreateRotationY((float)random.NextDouble() * MathHelper.Pi * 2, out rotation);
Matrix.Multiply(ref transform, ref rotation, out transform);
}
transform.M41 = (x * Step) + (float)(xx * Step);
transform.M43 = (z * Step) + (float)(zz * Step);
transforms.Add(transform);
}
}
}
model.SetInstanceTransforms(transforms.ToArray());
}
public static byte[] Compile(string effectCode)
{
using (var stream = new FileStream(Path.Combine(Path.GetTempPath(), Path.GetTempFileName()), FileMode.Create))
{
var writer = new StreamWriter(stream);
writer.Write(effectCode);
writer.Flush();
stream.Seek(0, SeekOrigin.Begin);
return(ContentPipeline.LoadContent <CompiledEffectContent>(stream
, new Microsoft.Xna.Framework.Content.Pipeline.EffectImporter()
, new EffectProcessor()).GetEffectCode());
}
}
public object Import(Stream stream, IServiceProvider serviceProvider)
{
return(ContentPipeline.LoadContent <Nine.Graphics.Heightmap>(stream, new Microsoft.Xna.Framework.Content.Pipeline.TextureImporter(), this));
}