static public VFXExpression Sequential3D(VFXExpression origin, VFXExpression axisX, VFXExpression axisY, VFXExpression axisZ, VFXExpression index, VFXExpression countX, VFXExpression countY, VFXExpression countZ)
{
index = VFXOperatorUtility.Modulo(index, countX * countY * countZ);
var z = new VFXExpressionCastUintToFloat(VFXOperatorUtility.Modulo(index, countZ));
var y = new VFXExpressionCastUintToFloat(VFXOperatorUtility.Modulo(index / countZ, countY));
var x = new VFXExpressionCastUintToFloat(index / (countY * countZ));
VFXExpression volumeSize = new VFXExpressionCombine(new VFXExpressionCastUintToFloat(countX), new VFXExpressionCastUintToFloat(countY), new VFXExpressionCastUintToFloat(countZ));
volumeSize = volumeSize - VFXOperatorUtility.OneExpression[VFXValueType.Float3];
var scaleAxisZero = Saturate(volumeSize); //Handle special case for one count => lead to be centered on origin (instead of -axis)
volumeSize = new VFXExpressionMax(volumeSize, VFXOperatorUtility.OneExpression[VFXValueType.Float3]);
var dt = new VFXExpressionCombine(x, y, z) / volumeSize;
dt = dt * VFXOperatorUtility.TwoExpression[VFXValueType.Float3] - VFXOperatorUtility.OneExpression[VFXValueType.Float3];
var r = origin;
r += dt.xxx * scaleAxisZero.xxx * axisX;
r += dt.yyy * scaleAxisZero.yyy * axisY;
r += dt.zzz * scaleAxisZero.zzz * axisZ;
return(r);
}
public static VFXExpression ApplyToExpressionGraph(VFXPropertyAttribute[] attributes, VFXExpression exp)
{
if (attributes != null)
{
foreach (VFXPropertyAttribute attribute in attributes)
{
switch (attribute.m_Type)
{
case Type.kRange:
exp = VFXOperatorUtility.Clamp(exp, VFXValue.Constant(attribute.m_Min), VFXValue.Constant(attribute.m_Max));
break;
case Type.kMin:
exp = new VFXExpressionMax(exp, VFXOperatorUtility.CastFloat(VFXValue.Constant(attribute.m_Min), exp.valueType));
break;
case Type.kNormalize:
exp = VFXOperatorUtility.Normalize(exp);
break;
case Type.kTooltip:
case Type.kAngle:
case Type.kColor:
case Type.kRegex:
case Type.kDelayed:
break;
default:
throw new NotImplementedException();
}
}
}
return(exp);
}
static public VFXExpression ApplyAddressingMode(VFXExpression index, VFXExpression count, SequentialAddressingMode mode)
{
VFXExpression r = null;
if (mode == SequentialAddressingMode.Wrap)
{
r = Modulo(index, count);
}
else if (mode == SequentialAddressingMode.Clamp)
{
var countMinusOne = count - OneExpression[VFXValueType.Uint32];
r = new VFXExpressionMin(index, countMinusOne);
}
else if (mode == SequentialAddressingMode.Mirror)
{
var two = TwoExpression[VFXValueType.Uint32];
var cycle = count * two - two;
cycle = new VFXExpressionMax(cycle, OneExpression[VFXValueType.Uint32]);
var modulo = Modulo(index, cycle);
//var compare = new VFXExpressionCondition(VFXCondition.Less, new VFXExpressionCastUintToFloat(modulo), new VFXExpressionCastUintToFloat(count)); <= Use this line for 7.x.x/8.x.x/9.x.x backport
var compare = new VFXExpressionCondition(VFXValueType.Uint32, VFXCondition.Less, modulo, count);
r = new VFXExpressionBranch(compare, modulo, cycle - modulo);
}
return(r);
}
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));
}
protected override VFXExpression Reduce(VFXExpression[] reducedParents)
{
VFXExpression inputSaturateExpression = null;
if (VFXExpressionMax.CanBeReducedToSaturate(this, reducedParents, out inputSaturateExpression))
{
return(new VFXExpressionSaturate(inputSaturateExpression));
}
return(base.Reduce(reducedParents));
}
static public VFXExpression Clamp(VFXExpression input, VFXExpression min, VFXExpression max, bool autoCast)
{
//Max(Min(x, max), min))
if (autoCast)
{
min = CastFloat(min, input.valueType);
max = CastFloat(max, input.valueType);
}
var maxExp = new VFXExpressionMax(input, min);
return(new VFXExpressionMin(maxExp, max));
}
public static VFXExpression ApplyToExpressionGraph(VFXPropertyAttribute[] attributes, VFXExpression exp)
{
if (attributes != null)
{
foreach (VFXPropertyAttribute attribute in attributes)
{
switch (attribute.m_Type)
{
case Type.kRange:
switch (exp.valueType)
{
case VFXValueType.Int32:
exp = VFXOperatorUtility.Clamp(exp, VFXValue.Constant((int)attribute.m_Min), VFXValue.Constant((int)attribute.m_Max), false);
break;
case VFXValueType.Uint32:
exp = VFXOperatorUtility.Clamp(exp, VFXValue.Constant((uint)attribute.m_Min), VFXValue.Constant((uint)attribute.m_Max), false);
break;
case VFXValueType.Float:
case VFXValueType.Float2:
case VFXValueType.Float3:
case VFXValueType.Float4:
exp = VFXOperatorUtility.Clamp(exp, VFXValue.Constant(attribute.m_Min), VFXValue.Constant(attribute.m_Max));
break;
default:
throw new NotImplementedException(string.Format("Cannot use RangeAttribute on value of type: {0}", exp.valueType));
}
break;
case Type.kMin:
switch (exp.valueType)
{
case VFXValueType.Int32:
exp = new VFXExpressionMax(exp, VFXValue.Constant((int)attribute.m_Min));
break;
case VFXValueType.Uint32:
exp = new VFXExpressionMax(exp, VFXValue.Constant((uint)attribute.m_Min));
break;
case VFXValueType.Float:
case VFXValueType.Float2:
case VFXValueType.Float3:
case VFXValueType.Float4:
exp = new VFXExpressionMax(exp, VFXOperatorUtility.CastFloat(VFXValue.Constant(attribute.m_Min), exp.valueType));
break;
default:
throw new NotImplementedException(string.Format("Cannot use MinAttribute on value of type: {0}", exp.valueType));
}
break;
case Type.kNormalize:
exp = VFXOperatorUtility.Normalize(exp);
break;
case Type.kTooltip:
case Type.kAngle:
case Type.kColor:
case Type.kRegex:
case Type.kDelayed:
case Type.kBitField:
break;
default:
throw new NotImplementedException();
}
}
}
return(exp);
}
public VFXExpression ApplyToExpressionGraph(VFXExpression exp)
{
if (m_GraphAttributes == null)
{
return(exp);
}
foreach (PropertyAttribute attribute in m_GraphAttributes)
{
if (attribute is RangeAttribute)
{
var rangeAttribute = (RangeAttribute)attribute;
switch (exp.valueType)
{
case VFXValueType.Int32:
exp = VFXOperatorUtility.Clamp(exp, VFXValue.Constant((int)rangeAttribute.min), VFXValue.Constant((int)rangeAttribute.max), false);
break;
case VFXValueType.Uint32:
exp = VFXOperatorUtility.Clamp(exp, VFXValue.Constant((uint)rangeAttribute.min), VFXValue.Constant((uint)rangeAttribute.max), false);
break;
case VFXValueType.Float:
case VFXValueType.Float2:
case VFXValueType.Float3:
case VFXValueType.Float4:
exp = VFXOperatorUtility.Clamp(exp, VFXValue.Constant(rangeAttribute.min), VFXValue.Constant(rangeAttribute.max));
break;
default:
throw new NotImplementedException(string.Format("Cannot use RangeAttribute on value of type: {0}", exp.valueType));
}
}
else if (attribute is MinAttribute)
{
var minAttribute = (MinAttribute)attribute;
switch (exp.valueType)
{
case VFXValueType.Int32:
exp = new VFXExpressionMax(exp, VFXValue.Constant((int)minAttribute.min));
break;
case VFXValueType.Uint32:
exp = new VFXExpressionMax(exp, VFXValue.Constant((uint)minAttribute.min));
break;
case VFXValueType.Float:
case VFXValueType.Float2:
case VFXValueType.Float3:
case VFXValueType.Float4:
exp = new VFXExpressionMax(exp, VFXOperatorUtility.CastFloat(VFXValue.Constant(minAttribute.min), exp.valueType));
break;
default:
throw new NotImplementedException(string.Format("Cannot use MinAttribute on value of type: {0}", exp.valueType));
}
}
else if (attribute is NormalizeAttribute)
{
exp = VFXOperatorUtility.Normalize(exp);
}
else if (attribute is EnumAttribute)
{
var enumAttribute = (EnumAttribute)attribute;
exp = new VFXExpressionMin(exp, VFXValue.Constant((uint)enumAttribute.values.Length - 1));
}
else
{
throw new NotImplementedException("Unrecognized expression attribute: " + attribute);
}
}
return(exp);
}