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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/webxr_util.js"></script>
<script src="resources/webxr_test_constants.js"></script>
<script src="resources/webxr_test_asserts.js"></script>
<canvas id="webgl-canvas"></canvas>
<script>
let testName = "XRRigidTransform inverse works";
let fakeDeviceInitParams = TRACKED_IMMERSIVE_DEVICE;
let testFunction =
(session, fakeDeviceController, t) => new Promise((resolve, reject) => {
// An identity transform should be equal to it's inverse.
let identity_transform = new XRRigidTransform();
t.step(() => {
assert_transform_approx_equals(identity_transform, identity_transform.inverse);
});
// Inversed transforms should yield the expected results
let transform = new XRRigidTransform(
{ x: 1.0, y: 2.0, z: 3.0 },
{ x: 0.0, y: 0.0, z: 0.0, w: 1.0 });
let inverse_transform = transform.inverse;
let expected_inverse = new XRRigidTransform(
{ x: -1.0, y: -2.0, z: -3.0 },
{ x: 0.0, y: 0.0, z: 0.0, w: 1.0 });
t.step(() => {
assert_transform_approx_equals(inverse_transform, expected_inverse);
});
transform = new XRRigidTransform(
{ x: 0.0, y: 0.0, z: 0.0 },
{ x: 1.0, y: 0.0, z: 0.0, w: 1.0 });
inverse_transform = transform.inverse;
expected_inverse = new XRRigidTransform(
{ x: 0.0, y: 0.0, z: 0.0 },
{ x: -1.0, y: 0.0, z: 0.0, w: 1.0 });
t.step(() => {
assert_transform_approx_equals(inverse_transform, expected_inverse);
});
transform = new XRRigidTransform(
{ x: 1.0, y: 2.0, z: 3.0 },
{ x: 0.0, y: 1.0, z: 0.0, w: 1.0 });
inverse_transform = transform.inverse;
expected_inverse = new XRRigidTransform(
{ x: 3.0, y: -2.0, z: -1.0 },
{ x: 0.0, y: -1.0, z: 0.0, w: 1.0 });
t.step(() => {
assert_transform_approx_equals(inverse_transform, expected_inverse);
});
// Transforms should be equal to the inverse of their inverse.
transform = new XRRigidTransform(
{ x: 1.0, y: 2.0, z: 3.0 },
{ x: 1.0, y: 2.0, z: 3.0, w: 4.0 });
inverse_transform = transform.inverse;
t.step(() => {
assert_transform_approx_equals(transform, inverse_transform.inverse);
});
transform = new XRRigidTransform(
{ x: -9.0, y: 8.0, z: -7.0 },
{ x: 6.0, y: -5.0, z: 4.0, w: 3.0 });
inverse_transform = transform.inverse;
t.step(() => {
assert_transform_approx_equals(transform, inverse_transform.inverse);
});
transform = new XRRigidTransform(
{ x: -2.0, y: 1.0, z: -4.0 },
{ x: 0.0, y: 1.0, z: 0.0, w: 1.0 });
inverse_transform = transform.inverse;
t.step(() => {
assert_transform_approx_equals(transform, inverse_transform.inverse);
});
transform = new XRRigidTransform(
{ x: 2.0, y: -1.0, z: 4.0 },
{ x: 1.0, y: 0.0, z: 0.0, w: 1.0 });
inverse_transform = transform.inverse;
t.step(() => {
assert_transform_approx_equals(transform, inverse_transform.inverse);
});
// Inverse should always return the same object, and calling inverse on that
// object should return the original object.
transform = new XRRigidTransform(
{ x: 1.0, y: -2.0, z: 3.0 },
{ x: 0.0, y: 0.0, z: 1.0, w: 1.0 });
inverse_transform = transform.inverse;
t.step(() => {
assert_true(transform.inverse === inverse_transform);
assert_true(inverse_transform.inverse === transform);
assert_true(transform.inverse.inverse === transform);
assert_true(transform.inverse.inverse.inverse === inverse_transform);
});
resolve();
});
xr_session_promise_test(testName, testFunction, fakeDeviceInitParams,
'immersive-vr');
</script>
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