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Fix looking at with 180 degree arc

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Co-authored-by: Fruitsalad <949631+fruitsalad@users.noreply.github.com>
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Silc Lizard (Tokage) Renew
2025-01-01 10:58:25 +09:00
parent 0f95e9f8e6
commit d0c421976c
7 changed files with 55 additions and 11 deletions
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30
tests/core/math/test_quaternion.h
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@@ -235,6 +235,36 @@ TEST_CASE("[Quaternion] Construct Basis Axes") {
CHECK(q[3] == doctest::Approx(0.8582598));
}
TEST_CASE("[Quaternion] Construct Shortest Arc For 180 Degree Arc") {
Vector3 up(0, 1, 0);
Vector3 down(0, -1, 0);
Vector3 left(-1, 0, 0);
Vector3 right(1, 0, 0);
Vector3 forward(0, 0, -1);
Vector3 back(0, 0, 1);
// When we have a 180 degree rotation quaternion which was defined as
// A to B, logically when we transform A we expect to get B.
Quaternion left_to_right(left, right);
Quaternion right_to_left(right, left);
CHECK(left_to_right.xform(left).is_equal_approx(right));
CHECK(Quaternion(right, left).xform(right).is_equal_approx(left));
CHECK(Quaternion(up, down).xform(up).is_equal_approx(down));
CHECK(Quaternion(down, up).xform(down).is_equal_approx(up));
CHECK(Quaternion(forward, back).xform(forward).is_equal_approx(back));
CHECK(Quaternion(back, forward).xform(back).is_equal_approx(forward));
// With (arbitrary) opposite vectors that are not axis-aligned as parameters.
Vector3 diagonal_up = Vector3(1.2, 2.3, 4.5).normalized();
Vector3 diagonal_down = -diagonal_up;
Quaternion q1(diagonal_up, diagonal_down);
CHECK(q1.xform(diagonal_down).is_equal_approx(diagonal_up));
CHECK(q1.xform(diagonal_up).is_equal_approx(diagonal_down));
// For the consistency of the rotation direction, they should be symmetrical to the plane.
CHECK(left_to_right.is_equal_approx(right_to_left.inverse()));
}
TEST_CASE("[Quaternion] Get Euler Orders") {
double x = Math::deg_to_rad(30.0);
double y = Math::deg_to_rad(45.0);