override protected VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression from = inputExpression[0];
VFXExpression to = inputExpression[1];
VFXExpression up = inputExpression[2];
VFXExpression viewVector = to - from;
VFXExpression z = VFXOperatorUtility.Normalize(viewVector);
VFXExpression x = VFXOperatorUtility.Normalize(VFXOperatorUtility.Cross(up, z));
VFXExpression y = VFXOperatorUtility.Cross(z, x);
VFXExpression matrix = new VFXExpressionVector3sToMatrix(x, y, z, from);
return(new[] { matrix });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
var pos = inputExpression[0];
var center = inputExpression[1];
var wAxis = inputExpression[2];
var angle = inputExpression[3];
var projPoint = center + (wAxis * VFXOperatorUtility.CastFloat(VFXOperatorUtility.Dot(wAxis, pos - center), VFXValueType.Float3));
var uAxis = pos - projPoint;
var vAxis = VFXOperatorUtility.Cross(uAxis, wAxis);
var sinAngle = VFXOperatorUtility.CastFloat(new VFXExpressionSin(angle), VFXValueType.Float3);
var cosAngle = VFXOperatorUtility.CastFloat(new VFXExpressionCos(angle), VFXValueType.Float3);
return(new[] { projPoint + (uAxis * cosAngle) + (vAxis * sinAngle) });
}
public void ProcessOperatorCross()
{
var a = new Vector3(1.1f, 2.2f, 3.3f);
var b = new Vector3(4.4f, 5.5f, 6.6f);
var value_a = new VFXValue <Vector3>(a);
var value_b = new VFXValue <Vector3>(b);
var expressionA = VFXOperatorUtility.Cross(value_a, value_b);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var resultExpressionA = context.Compile(expressionA);
var resultValue = resultExpressionA.Get <Vector3>();
var expectedValue = Vector3.Cross(a, b);
Assert.AreEqual(expectedValue.x, resultValue.x, 0.001f);
Assert.AreEqual(expectedValue.y, resultValue.y, 0.001f);
Assert.AreEqual(expectedValue.z, resultValue.z, 0.001f);
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new[] { VFXOperatorUtility.Cross(inputExpression[0], inputExpression[1]) });
}
