/// <inheritdoc />
public override unsafe void PatchVertexBuffer(ParticleVertexBuilder vertexBuilder, Vector3 invViewX, Vector3 invViewY, ParticleSorter sorter)
{
// If you want, you can integrate the base builder here and not call it. It should result in slight speed up
base.PatchVertexBuffer(vertexBuilder, invViewX, invViewY, sorter);
var colorField = sorter.GetField(ParticleFields.Color);
if (!colorField.IsValid())
{
return;
}
var colAttribute = vertexBuilder.GetAccessor(VertexAttributes.Color);
if (colAttribute.Size <= 0)
{
return;
}
foreach (var particle in sorter)
{
// Set the vertex color attribute to the particle's color field
var color = (uint)(*(Color4 *)particle[colorField]).ToRgba();
vertexBuilder.SetAttributePerParticle(colAttribute, (IntPtr)(&color));
vertexBuilder.NextParticle();
}
vertexBuilder.RestartBuffer();
}
/// <inheritdoc />
public unsafe override void PatchVertexBuffer(ParticleVertexBuilder vertexBuilder, Vector3 invViewX, Vector3 invViewY, ParticleSorter sorter)
{
// If you want, you can implement the base builder here and not call it. It should result in slight speed up
base.PatchVertexBuffer(vertexBuilder, invViewX, invViewY, sorter);
// The UV Builder, if present, animates the basic (0, 0, 1, 1) uv coordinates of each billboard
UVBuilder?.BuildUVCoordinates(vertexBuilder, sorter, vertexBuilder.DefaultTexCoords);
vertexBuilder.RestartBuffer();
// If the particles have color field, the base class should have already passed the information
if (HasColorField)
{
return;
}
// If the particles don't have color field but there is no color stream either we don't need to fill anything
var colAttribute = vertexBuilder.GetAccessor(VertexAttributes.Color);
if (colAttribute.Size <= 0)
{
return;
}
// Since the particles don't have their own color field, set the default color to white
var color = 0xFFFFFFFF;
foreach (var particle in sorter)
{
vertexBuilder.SetAttributePerParticle(colAttribute, (IntPtr)(&color));
vertexBuilder.NextParticle();
}
vertexBuilder.RestartBuffer();
}
/// <inheritdoc />
public unsafe override void BuildUVCoordinates(ParticleVertexBuilder vertexBuilder, ParticleSorter sorter, AttributeDescription texCoordsDescription)
{
var lifeField = sorter.GetField(ParticleFields.RemainingLife);
if (!lifeField.IsValid())
{
return;
}
var texAttribute = vertexBuilder.GetAccessor(texCoordsDescription);
if (texAttribute.Size == 0 && texAttribute.Offset == 0)
{
return;
}
var texDefault = vertexBuilder.GetAccessor(vertexBuilder.DefaultTexCoords);
if (texDefault.Size == 0 && texDefault.Offset == 0)
{
return;
}
foreach (var particle in sorter)
{
var normalizedTimeline = 1f - *(float *)(particle[lifeField]);
var spriteId = startingFrame + (int)(normalizedTimeline * animationSpeedOverLife);
var uvTransform = new Vector4((spriteId % xDivisions) * xStep, (spriteId / yDivisions) * yStep, xStep, yStep);
ParticleVertexBuilder.TransformAttributeDelegate <Vector2> transformCoords =
(ref Vector2 value) =>
{
value.X = uvTransform.X + uvTransform.Z * value.X;
value.Y = uvTransform.Y + uvTransform.W * value.Y;
};
vertexBuilder.TransformAttributePerParticle(texDefault, texAttribute, transformCoords);
vertexBuilder.NextParticle();
}
vertexBuilder.RestartBuffer();
}
/// <inheritdoc />
public unsafe override void BuildUVCoordinates(ParticleVertexBuilder vertexBuilder, ParticleSorter sorter, AttributeDescription texCoordsDescription)
{
var lifeField = sorter.GetField(ParticleFields.RemainingLife);
if (!lifeField.IsValid())
{
return;
}
var texAttribute = vertexBuilder.GetAccessor(texCoordsDescription);
if (texAttribute.Size == 0 && texAttribute.Offset == 0)
{
return;
}
var texDefault = vertexBuilder.GetAccessor(vertexBuilder.DefaultTexCoords);
if (texDefault.Size == 0 && texDefault.Offset == 0)
{
return;
}
foreach (var particle in sorter)
{
var normalizedTimeline = 1f - *(float *)(particle[lifeField]);;
var uvTransform = Vector4.Lerp(StartFrame, EndFrame, normalizedTimeline);
uvTransform.Z -= uvTransform.X;
uvTransform.W -= uvTransform.Y;
ParticleVertexBuilder.TransformAttributeDelegate <Vector2> transformCoords =
(ref Vector2 value) =>
{
value.X = uvTransform.X + uvTransform.Z * value.X;
value.Y = uvTransform.Y + uvTransform.W * value.Y;
};
vertexBuilder.TransformAttributePerParticle(texDefault, texAttribute, transformCoords);
vertexBuilder.NextParticle();
}
vertexBuilder.RestartBuffer();
}
public unsafe override void PatchVertexBuffer(ParticleVertexBuilder vertexBuilder, Vector3 invViewX, Vector3 invViewY, ParticleSorter sorter)
{
// If you want, you can integrate the base builder here and not call it. It should result in slight speed up
base.PatchVertexBuffer(vertexBuilder, invViewX, invViewY, sorter);
// Update the non-default coordinates first, because they update off the default ones
UVBuilder1?.BuildUVCoordinates(vertexBuilder, sorter, texCoord1);
// Update the default coordinates last
UVBuilder0?.BuildUVCoordinates(vertexBuilder, sorter, texCoord0);
// If the particles have color field, the base class should have already passed the information
if (HasColorField)
{
return;
}
// If there is no color stream we don't need to fill anything
var colAttribute = vertexBuilder.GetAccessor(VertexAttributes.Color);
if (colAttribute.Size <= 0)
{
return;
}
// Since the particles don't have their own color field, set the default color to white
var color = 0xFFFFFFFF;
vertexBuilder.RestartBuffer();
foreach (var particle in sorter)
{
vertexBuilder.SetAttributePerParticle(colAttribute, (IntPtr)(&color));
vertexBuilder.NextParticle();
}
vertexBuilder.RestartBuffer();
}
