public override void Render(IGameViewport viewport, PartSysEmitter emitter)
{
var it = emitter.NewIterator();
var animParams = AnimatedModelParams.Default;
animParams.rotation3d = true;
// Lazily initialize render state
if (!emitter.HasRenderState())
{
// Resolve the mesh filename
var baseName = ResolveBasename(emitter.GetSpec().GetMeshName());
var skmName = baseName + ".skm";
var skaName = baseName + ".ska";
try
{
var animId = new EncodedAnimId(NormalAnimType.ItemIdle); // This seems to be item_idle
var model = _modelFactory.FromFilenames(skmName, skaName, animId, animParams);
emitter.SetRenderState(
new ModelEmitterRenderState(model)
);
}
catch (Exception e)
{
Logger.Error("Unable to load model {0} for particle system {1}: {2}",
baseName, emitter.GetSpec().GetParent().GetName(), e);
emitter.SetRenderState(new ModelEmitterRenderState(null));
}
}
var renderState = (ModelEmitterRenderState)emitter.GetRenderState();
if (renderState.Model == null)
{
return; // The loader above was unable to load the model for this emitter
}
var overrides = new MdfRenderOverrides
{
ignoreLighting = true,
overrideDiffuse = true
};
var yaw = emitter.GetParamState(PartSysParamId.part_yaw);
var pitch = emitter.GetParamState(PartSysParamId.part_pitch);
var roll = emitter.GetParamState(PartSysParamId.part_roll);
while (it.HasNext())
{
var particleIdx = it.Next();
var age = emitter.GetParticleAge(particleIdx);
overrides.overrideColor = GeneralEmitterRenderState.GetParticleColor(emitter, particleIdx);
// Yes, this is *actually* swapped for Y / Z
var particleState = emitter.GetParticleState();
animParams.offsetX = particleState.GetState(ParticleStateField.PSF_POS_VAR_X, particleIdx);
animParams.offsetY = particleState.GetState(ParticleStateField.PSF_POS_VAR_Z, particleIdx);
animParams.offsetZ = particleState.GetState(ParticleStateField.PSF_POS_VAR_Y, particleIdx);
if (yaw != null)
{
animParams.rotationYaw = Angles.ToRadians(yaw.GetValue(emitter, particleIdx, age));
}
if (pitch != null)
{
animParams.rotationPitch = Angles.ToRadians(pitch.GetValue(emitter, particleIdx, age));
}
if (roll != null)
{
animParams.rotationRoll = Angles.ToRadians(roll.GetValue(emitter, particleIdx, age));
}
renderState.Model.SetTime(animParams, age);
_modelRenderer.Render(viewport, renderState.Model, animParams, new List <Light3d>(), overrides);
}
}
protected override void FillVertex(PartSysEmitter emitter,
int particleIdx,
Span <SpriteVertex> vertices,
int vertexIdx)
{
// Calculate the particle scale (default is 1)
var scale = 1.0f;
var scaleParam = emitter.GetParamState(PartSysParamId.part_scale_X);
if (scaleParam != null)
{
scale = scaleParam.GetValue(emitter, particleIdx,
emitter.GetParticleAge(particleIdx));
}
Vector4 halfPartHeightX;
Vector4 halfPartHeightY;
var rotationParam = emitter.GetParamState(PartSysParamId.part_yaw);
if (rotationParam != null)
{
var rotation = rotationParam.GetValue(
emitter, particleIdx, emitter.GetParticleAge(particleIdx));
rotation += emitter.GetParticleState().GetState(ParticleStateField.PSF_ROTATION, particleIdx);
rotation = Angles.ToRadians(rotation);
var cosRot = MathF.Cos(rotation) * scale;
var sinRot = MathF.Sin(rotation) * scale;
halfPartHeightX = screenSpaceUnitX * cosRot - screenSpaceUnitY * sinRot;
halfPartHeightY = screenSpaceUnitY * cosRot + screenSpaceUnitX * sinRot;
}
else
{
halfPartHeightX = screenSpaceUnitX * scale;
halfPartHeightY = screenSpaceUnitY * scale;
}
var partPos = new Vector4(
emitter.GetParticleState().GetState(ParticleStateField.PSF_POS_VAR_X, particleIdx),
emitter.GetParticleState().GetState(ParticleStateField.PSF_POS_VAR_Y, particleIdx),
emitter.GetParticleState().GetState(ParticleStateField.PSF_POS_VAR_Z, particleIdx),
1
);
// Upper left corner
vertices[vertexIdx + 0].pos = partPos - halfPartHeightX + halfPartHeightY;
// Upper right corner
vertices[vertexIdx + 1].pos = partPos + halfPartHeightX + halfPartHeightY;
// Lower right corner
vertices[vertexIdx + 2].pos = partPos + halfPartHeightX - halfPartHeightY;
// Lower left corner
vertices[vertexIdx + 3].pos = partPos - halfPartHeightX - halfPartHeightY;
// Set the diffuse color for all corners
var diffuse = GeneralEmitterRenderState.GetParticleColor(emitter, particleIdx);
vertices[vertexIdx + 0].diffuse = diffuse;
vertices[vertexIdx + 1].diffuse = diffuse;
vertices[vertexIdx + 2].diffuse = diffuse;
vertices[vertexIdx + 3].diffuse = diffuse;
// Set UV coordinates for the sprite. We need to do this every frame
// because we're using DISCARD for locking
vertices[vertexIdx + 0].u = 0;
vertices[vertexIdx + 0].v = 1;
vertices[vertexIdx + 1].u = 1;
vertices[vertexIdx + 1].v = 1;
vertices[vertexIdx + 2].u = 1;
vertices[vertexIdx + 2].v = 0;
vertices[vertexIdx + 3].u = 0;
vertices[vertexIdx + 3].v = 0;
}