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 });
}
public void ProcessExpressionVector3sToMatrix()
{
var x = Vector3.right;
var y = Vector3.up;
var z = Vector3.forward;
var w = Vector3.zero;
var xValue = VFXValue.Constant(x);
var yValue = VFXValue.Constant(y);
var zValue = VFXValue.Constant(z);
var wValue = VFXValue.Constant(w);
var matrixValue = new VFXExpressionVector3sToMatrix(xValue, yValue, zValue, wValue);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var reduced = context.Compile(matrixValue);
Assert.AreEqual(Matrix4x4.identity, reduced.Get <Matrix4x4>());
}
