public void TestAxisConvention()
{
AxisConvention[] acs =
{
AxisConvention.kUnity,
AxisConvention.kGltf2,
AxisConvention.kUsd,
AxisConvention.kStl,
AxisConvention.kUnreal
};
foreach (var ac1 in acs)
{
foreach (var ac2 in acs)
{
Matrix4x4 ac1FromAc2 = AxisConvention.GetToDstFromSrc(ac1, ac2);
Assert.AreEqual(ac1.forward, ac1FromAc2.MultiplyVector(ac2.forward));
Assert.AreEqual(ac1.right, ac1FromAc2.MultiplyVector(ac2.right));
Assert.AreEqual(ac1.up, ac1FromAc2.MultiplyVector(ac2.up));
}
}
foreach (var ac in acs)
{
Matrix4x4 fromUnity = AxisConvention.GetFromUnity(ac);
Assert.AreEqual(ac.forward, fromUnity.MultiplyVector(Vector3.forward));
Assert.AreEqual(ac.right, fromUnity.MultiplyVector(Vector3.right));
Assert.AreEqual(ac.up, fromUnity.MultiplyVector(Vector3.up));
Matrix4x4 toUnity = AxisConvention.GetToUnity(ac);
Assert.AreEqual(Vector3.forward, toUnity.MultiplyVector(ac.forward));
Assert.AreEqual(Vector3.right, toUnity.MultiplyVector(ac.right));
Assert.AreEqual(Vector3.up, toUnity.MultiplyVector(ac.up));
}
}
/// Given a transform, returns that transform in another basis.
/// Since it's a Transform, xfInput is in Global (Room) space, Unity axes, decimeters.
/// The new basis is: Scene space, with the Payload's axes and units.
public static Matrix4x4 ChangeBasis(
Transform xfInput, SceneStatePayload payload)
{
Matrix4x4 basis = AxisConvention.GetFromUnity(payload.axes);
Matrix4x4 basisInverse = AxisConvention.GetToUnity(payload.axes);
return(ChangeBasis(App.Scene.AsScene[xfInput], basis, basisInverse)
.TransformBy(TrTransform.S(payload.exportUnitsFromAppUnits))
.ToMatrix4x4());
}