static public VFXExpression SequentialLine(VFXExpression start, VFXExpression end, VFXExpression index, VFXExpression count)
{
VFXExpression dt = new VFXExpressionCastUintToFloat(VFXOperatorUtility.Modulo(index, count));
dt = dt / new VFXExpressionCastUintToFloat(count);
dt = new VFXExpressionCombine(dt, dt, dt);
return(VFXOperatorUtility.Lerp(start, end, dt));
}
static public VFXExpression SequentialLine(VFXExpression start, VFXExpression end, VFXExpression index, VFXExpression count)
{
VFXExpression dt = new VFXExpressionCastUintToFloat(VFXOperatorUtility.Modulo(index, count));
var size = new VFXExpressionCastUintToFloat(count) - VFXOperatorUtility.OneExpression[VFXValueType.Float];
size = new VFXExpressionMax(size, VFXOperatorUtility.OneExpression[VFXValueType.Float]);
dt = dt / size;
dt = new VFXExpressionCombine(dt, dt, dt);
return(VFXOperatorUtility.Lerp(start, end, dt));
}
static private VFXExpression ApplyAddressingMode(VFXExpression index, VFXExpression count, SequentialAddressingMode mode)
{
VFXExpression r = null;
if (mode == SequentialAddressingMode.Wrap)
{
r = VFXOperatorUtility.Modulo(index, count);
}
else if (mode == SequentialAddressingMode.Clamp)
{
r = VFXOperatorUtility.Clamp(index, ZeroExpression[VFXValueType.Uint32], count, false);
}
else if (mode == SequentialAddressingMode.Mirror)
{
var direction = VFXOperatorUtility.Modulo(index / count, VFXOperatorUtility.TwoExpression[VFXValueType.Uint32]);
var modulo = VFXOperatorUtility.Modulo(index, count);
r = VFXOperatorUtility.Lerp(modulo, count - modulo, direction);
}
return(r);
}
static VFXExpression RandomFromVector2(VFXExpression input)
{
return(VFXOperatorUtility.Lerp(input.x, input.y, new VFXExpressionRandom()));
}
static VFXExpression RandomFromVector2(VFXExpression input, RandId randId)
{
return(VFXOperatorUtility.Lerp(input.x, input.y, new VFXExpressionRandom(false, randId)));
}
