private static readonly float pointSpriteSize = 1.8f; // guessing
public void AddEmitter(ParticleEmitter emitter)
{
// get the texture for this gfxobj
var gfxObj = GfxObjCache.Get(emitter.Info.HWGfxObjID);
var texture = gfxObj.Textures[0];
var surfaceType = gfxObj.Surfaces[0].Type;
if (gfxObj.Polygons.Count != 1)
{
Console.WriteLine($"ParticleBatch.AddEmitter({emitter.Info._info.Id:X8}) - Polygons.Count for {gfxObj._gfxObj.Id:X8} == {gfxObj.Polygons.Count}, expected 1!");
return;
}
var textureFormat = new ParticleTextureFormat(texture.Format, surfaceType, texture.Width, texture.Height);
if (!DrawCalls.TryGetValue(textureFormat, out var batch))
{
batch = new ParticleBatchDraw(textureFormat);
DrawCalls.Add(textureFormat, batch);
}
var polygon = gfxObj.Polygons[0];
var surfaceIdx = polygon._polygon.PosSurface;
var surfaceID = gfxObj._gfxObj.Surfaces[surfaceIdx];
// PlacementFrames transform omitted, since it contains none from SimpleSetup
// basically we want to add an instance for each of the possible particle slots,
// and a mapping from each particle slot -> the render instance
if (gfxObj.BoundingBox == null)
{
gfxObj.BuildBoundingBox();
//if (gfxObj.BoundingBox.Size.Y != 0)
//Console.WriteLine($"Warning: Found particle BoundingBox where Size.Y > 0 for {gfxObj._gfxObj.Id:X8}");
//Console.WriteLine($"{gfxObj._gfxObj.Id:X8} bbox: {gfxObj.BoundingBox.Mins} - {gfxObj.BoundingBox.Maxs}");
}
var dims = new Vector2(gfxObj.BoundingBox.Size.X * pointSpriteSize, gfxObj.BoundingBox.Size.Z * pointSpriteSize);
for (var i = 0; i < emitter.Info.MaxParticles; i++)
{
var startIdx = batch.AddParticleSlot(surfaceID, dims);
if (i == 0)
{
//Console.WriteLine($"DrawIdx: {startIdx}");
emitter.RenderBatch = batch;
emitter.BatchIdx = startIdx;
}
}
}
public ParticleBatchDraw(ParticleTextureFormat textureFormat)
{
Init();
TextureFormat = textureFormat;
}