libs/base/src/eu/base/transform.cc
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include "eu/base/transform.h" | ||
| 2 | |||
| 3 | #include <cmath> | ||
| 4 | #include <algorithm> | ||
| 5 | |||
| 6 | namespace eu | ||
| 7 | { | ||
| 8 | Transform | ||
| 9 | ✗ | transform_from_matrix(const m4& m) | |
| 10 | { | ||
| 11 | // heavily inspired by DecomposeMatrixToComponents from imguizmo | ||
| 12 | ✗ | const auto right = m.get_column(0).to_vec3(0.0f); | |
| 13 | ✗ | const auto up = m.get_column(1).to_vec3(0.0f); | |
| 14 | ✗ | const auto out = m.get_column(2).to_vec3(0.0f); | |
| 15 | |||
| 16 | const auto scale = v3 | ||
| 17 | { | ||
| 18 | right.get_length(), | ||
| 19 | up.get_length(), | ||
| 20 | out.get_length() | ||
| 21 | ✗ | }; | |
| 22 | |||
| 23 | // orthonormalize the basis to drop the scale | ||
| 24 | ✗ | const auto normalized_right = right.get_normalized().value_or(kk::right); | |
| 25 | ✗ | const auto normalized_up = up.get_normalized().value_or(kk::up); | |
| 26 | ✗ | const auto normalized_out = out.get_normalized().value_or(kk::out); | |
| 27 | |||
| 28 | ✗ | const auto rotation_matrix = m4::from_basis(normalized_right, normalized_up, normalized_out); | |
| 29 | |||
| 30 | return | ||
| 31 | { | ||
| 32 | ✗ | .position = m.get_translation(), | |
| 33 | ✗ | .rotation = Q::from_rotation_matrix(rotation_matrix).get_normalized(), | |
| 34 | .scale = scale | ||
| 35 | ✗ | }; | |
| 36 | } | ||
| 37 | |||
| 38 | |||
| 39 | m4 | ||
| 40 | ✗ | matrix_from_transform(const Transform& t) | |
| 41 | { | ||
| 42 | // heavily inspired by RecomposeMatrixFromComponents from imguizmo | ||
| 43 | |||
| 44 | const auto rotation = m4::from_basis | ||
| 45 | ✗ | ( | |
| 46 | ✗ | t.rotation.get_local_right(), | |
| 47 | ✗ | t.rotation.get_local_up(), | |
| 48 | ✗ | t.rotation.get_local_out() | |
| 49 | ); | ||
| 50 | |||
| 51 | ✗ | return m4::from_translation(t.position) * rotation * m4::from_scale(t.scale); | |
| 52 | } | ||
| 53 | } | ||
| 54 |