public void Update(List <BasicEntity> entities, GraphicsDevice graphics, DistanceFieldRenderModule distanceFieldRenderModule, FullScreenTriangle fullScreenTriangle, ref List <SignedDistanceField> sdfDefinitionsOut)
{
//First let's check which entities need building, if at all!
sdfDefinitions.Clear();
//This should preferably be a list of meshes that are in the scene, instead of a list of entities
for (var index0 = 0; index0 < entities.Count; index0++)
{
BasicEntity entity = entities[index0];
if (!entity.SignedDistanceField.IsUsed)
{
continue;
}
if (entity.SignedDistanceField.NeedsToBeGenerated)
{
GenerateDistanceFields(entity, graphics, distanceFieldRenderModule, fullScreenTriangle);
}
bool found = false;
//Compile a list of all mbbs used right now
for (var i = 0; i < sdfDefinitions.Count; i++)
{
if (entity.SignedDistanceField == sdfDefinitions[i])
{
found = true;
break;
}
}
if (!found)
{
sdfDefinitions.Add(entity.SignedDistanceField);
}
}
//Now for the model definitions
for (var i = 0; i < sdfDefinitions.Count; i++)
{
if (GameSettings.sdf_regenerate)
{
sdfDefinitions[i].NeedsToBeGenerated = true;
}
}
GameSettings.sdf_regenerate = false;
sdfDefinitionsOut = sdfDefinitions;
}
public void GenerateDistanceFields(BasicEntity entity, GraphicsDevice graphics, DistanceFieldRenderModule distanceFieldRenderModule, FullScreenTriangle fullScreenTriangle)
{
SignedDistanceField uncomputedSignedDistanceField = entity.SignedDistanceField;
Model unprocessedModel = entity.Model;
//Set to false so it won't get covered in future
uncomputedSignedDistanceField.NeedsToBeGenerated = false;
uncomputedSignedDistanceField.IsLoaded = false;
uncomputedSignedDistanceField.SdfTexture?.Dispose();
//First generate tris
Triangle[] triangles;
GenerateTriangles(unprocessedModel, out triangles);
int xsteps = (int)uncomputedSignedDistanceField.TextureResolution.X;
int ysteps = (int)uncomputedSignedDistanceField.TextureResolution.Y;
int zsteps = (int)uncomputedSignedDistanceField.TextureResolution.Z;
Texture2D output;
if (!GameSettings.sdf_cpu)
{
Stopwatch stopwatch = Stopwatch.StartNew();
int maxwidth = 4096; //16384
int requiredData = triangles.Length * 3;
int x = maxwidth;//Math.Min(requiredData, maxwidth);
int y = requiredData / x + 1;
Vector4[] data = new Vector4[x * y];
int index = 0;
for (int i = 0; i < triangles.Length; i++, index += 3)
{
data[index] = new Vector4(triangles[i].a, 0);
data[index + 1] = new Vector4(triangles[i].b, 0);
data[index + 2] = new Vector4(triangles[i].c, 0);
}
//16k
Texture2D triangleData = new Texture2D(graphics, x, y, false, SurfaceFormat.Vector4);
triangleData.SetData(data);
output = distanceFieldRenderModule.CreateSDFTexture(graphics, triangleData, xsteps, ysteps,
zsteps, uncomputedSignedDistanceField, fullScreenTriangle, triangles.Length);
stopwatch.Stop();
Debug.Write("\nSDF generated in " + stopwatch.ElapsedMilliseconds + "ms on GPU");
float[] texData = new float[xsteps * ysteps * zsteps];
output.GetData(texData);
string path = uncomputedSignedDistanceField.TexturePath;
DataStream.SaveImageData(texData, xsteps, ysteps, zsteps, path);
uncomputedSignedDistanceField.TextureResolution = new Vector4(xsteps, ysteps, zsteps, 0);
uncomputedSignedDistanceField.SdfTexture = output;
uncomputedSignedDistanceField.IsLoaded = true;
}
else
{
generateTask = Task.Factory.StartNew(() =>
{
output = new Texture2D(graphics, xsteps * zsteps, ysteps, false, SurfaceFormat.Single);
float[] data = new float[xsteps * ysteps * zsteps];
Stopwatch stopwatch = Stopwatch.StartNew();
int numberOfThreads = GameSettings.sdf_threads;
if (numberOfThreads > 1)
{
Task[] threads = new Task[numberOfThreads - 1];
//Make local datas
float[][] dataArray = new float[numberOfThreads][];
for (int index = 0; index < threads.Length; index++)
{
int i = index;
dataArray[index + 1] = new float[xsteps * ysteps * zsteps];
threads[i] = Task.Factory.StartNew(() =>
{
GenerateData(xsteps, ysteps, zsteps, uncomputedSignedDistanceField,
ref dataArray[i + 1], i + 1,
numberOfThreads, triangles);
});
}
dataArray[0] = data;
GenerateData(xsteps, ysteps, zsteps, uncomputedSignedDistanceField, ref dataArray[0], 0,
numberOfThreads, triangles);
Task.WaitAll(threads);
//Something broke?
for (int i = 0; i < data.Length; i++)
{
//data[i] = dataArray[i % numberOfThreads][i];
for (int j = 0; j < numberOfThreads; j++)
{
if (dataArray[j][i] != 0)
{
data[i] = dataArray[j][i];
break;
}
}
}
for (var index2 = 0; index2 < threads.Length; index2++)
{
threads[index2].Dispose();
}
}
else
{
GenerateData(xsteps, ysteps, zsteps, uncomputedSignedDistanceField, ref data, 0,
numberOfThreads, triangles);
}
stopwatch.Stop();
Debug.Write("\nSDF generated in " + stopwatch.ElapsedMilliseconds + "ms with " +
GameSettings.sdf_threads + " thread(s)");
string path = uncomputedSignedDistanceField.TexturePath;
DataStream.SaveImageData(data, xsteps, ysteps, zsteps, path);
output.SetData(data);
uncomputedSignedDistanceField.TextureResolution = new Vector4(xsteps, ysteps, zsteps, 0);
uncomputedSignedDistanceField.SdfTexture = output;
uncomputedSignedDistanceField.IsLoaded = true;
});
}
}
