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https://github.com/panda3d/panda3d.git
synced 2025-10-04 19:08:55 -04:00
add get_quat() and get_uniform_scale()
This commit is contained in:
David Rose
parent
bd3d94ccec
commit
bc946860e6
@ -63,6 +63,19 @@ make_hpr(const LVecBase3f &hpr) {
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LVecBase3f(1.0f, 1.0f, 1.0f));
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::make_quat
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// Access: Published, Static
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// Description: Makes a new TransformState with the specified
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// components.
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////////////////////////////////////////////////////////////////////
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INLINE CPT(TransformState) TransformState::
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make_quat(const LQuaternionf &quat) {
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return make_pos_quat_scale(LVecBase3f(0.0f, 0.0f, 0.0f),
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quat,
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LVecBase3f(1.0f, 1.0f, 1.0f));
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::make_pos_hpr
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// Access: Published, Static
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@ -168,15 +181,44 @@ has_components() const {
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// Description: Returns true if the transform was specified
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// componentwise, or false if it was specified with a
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// general 4x4 matrix. If this is true, the components
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// returned by get_pos(), get_hpr(), and get_scale()
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// will be exactly those that were set; otherwise, these
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// functions will return computed values.
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// returned by get_pos() and get_scale() will be exactly
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// those that were set; otherwise, these functions will
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// return computed values. If this is true, the
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// rotation may have been set either with a hpr trio or
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// with a quaternion; hpr_given() or quat_given() can
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// resolve the difference.
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////////////////////////////////////////////////////////////////////
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INLINE bool TransformState::
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components_given() const {
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return ((_flags & F_components_given) != 0);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::hpr_given
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// Access: Published
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// Description: Returns true if the rotation was specified via a trio
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// of Euler angles, false otherwise. If this is true,
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// get_hpr() will be exactly as set; otherwise, it will
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// return a computed value.
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////////////////////////////////////////////////////////////////////
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INLINE bool TransformState::
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hpr_given() const {
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return ((_flags & F_hpr_given) != 0);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::quat_given
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// Access: Published
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// Description: Returns true if the rotation was specified via a
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// quaternion, false otherwise. If this is true,
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// get_quat() will be exactly as set; otherwise, it will
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// return a computed value.
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////////////////////////////////////////////////////////////////////
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INLINE bool TransformState::
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quat_given() const {
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return ((_flags & F_quat_given) != 0);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::has_pos
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// Access: Published
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@ -203,6 +245,19 @@ has_hpr() const {
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return has_components();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::has_quat
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// Access: Published
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// Description: Returns true if the transform's rotation component
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// can be extracted out separately and described as a
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// quaternion. This is generally true only when
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// has_components() is true.
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////////////////////////////////////////////////////////////////////
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INLINE bool TransformState::
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has_quat() const {
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return has_components();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::has_scale
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// Access: Published
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@ -215,6 +270,20 @@ has_scale() const {
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return has_components();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::has_uniform_scale
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// Access: Published
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// Description: Returns true if the scale is uniform across all three
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// axes (and therefore can be expressed as a single
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// number), or false if the transform has a different
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// scale in different dimensions.
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////////////////////////////////////////////////////////////////////
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INLINE bool TransformState::
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has_uniform_scale() const {
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check_components();
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return (_flags & F_uniform_scale) != 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::has_mat
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// Access: Published
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@ -243,17 +312,31 @@ get_pos() const {
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::get_hpr
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// Access: Published
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// Description: Returns the hpr component of the transform. It is an
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// error to call this if has_components() returned
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// false.
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// Description: Returns the rotation component of the transform as a
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// trio of Euler angles. It is an error to call this if
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// has_components() returned false.
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////////////////////////////////////////////////////////////////////
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INLINE const LVecBase3f &TransformState::
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get_hpr() const {
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check_components();
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check_hpr();
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nassertr(has_hpr(), _hpr);
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return _hpr;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::get_quat
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// Access: Published
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// Description: Returns the rotation component of the transform as a
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// quaternion. It is an error to call this if
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// has_components() returned false.
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////////////////////////////////////////////////////////////////////
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INLINE const LQuaternionf &TransformState::
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get_quat() const {
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check_quat();
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nassertr(has_quat(), _quat);
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return _quat;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::get_scale
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// Access: Published
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@ -268,6 +351,20 @@ get_scale() const {
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return _scale;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::get_uniform_scale
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// Access: Published
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// Description: Returns the scale component of the transform, as a
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// single number. It is an error to call this if
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// has_uniform_scale() returned false.
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////////////////////////////////////////////////////////////////////
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INLINE float TransformState::
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get_uniform_scale() const {
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check_components();
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nassertr(has_uniform_scale(), _scale[0]);
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return _scale[0];
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::get_mat
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// Access: Published
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@ -309,6 +406,36 @@ check_components() const {
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::check_hpr
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// Access: Private
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// Description: Ensures that we know the hpr of the transform
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// (or that we know they cannot be derived).
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////////////////////////////////////////////////////////////////////
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INLINE void TransformState::
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check_hpr() const {
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// This pretends to be a const function, even though it's not,
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// because it only updates a transparent cache value.
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if ((_flags & F_hpr_known) == 0) {
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((TransformState *)this)->calc_hpr();
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::check_quat
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// Access: Private
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// Description: Ensures that we know the quat of the transform
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// (or that we know they cannot be derived).
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////////////////////////////////////////////////////////////////////
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INLINE void TransformState::
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check_quat() const {
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// This pretends to be a const function, even though it's not,
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// because it only updates a transparent cache value.
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if ((_flags & F_quat_known) == 0) {
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((TransformState *)this)->calc_quat();
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::check_mat
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// Access: Private
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@ -323,6 +450,21 @@ check_mat() const {
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::check_uniform_scale
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// Access: Private
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// Description: Should be called immediately after _scale (and
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// F_has_components) is set, this checks for a uniform
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// scale and sets the bit appropriately.
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////////////////////////////////////////////////////////////////////
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INLINE void TransformState::
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check_uniform_scale() {
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if (IS_NEARLY_EQUAL(_scale[0], _scale[1]) &&
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IS_NEARLY_EQUAL(_scale[0], _scale[2])) {
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_flags |= F_uniform_scale;
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::set_destructing
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// Access: Private
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@ -206,7 +206,7 @@ TransformState::
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bool TransformState::
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operator < (const TransformState &other) const {
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static const int significant_flags =
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(F_is_invalid | F_is_identity | F_components_given);
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(F_is_invalid | F_is_identity | F_components_given | F_hpr_given);
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int flags = (_flags & significant_flags);
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int other_flags = (other._flags & significant_flags);
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@ -220,7 +220,8 @@ operator < (const TransformState &other) const {
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return 0;
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}
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if ((_flags & F_components_given) != 0) {
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if ((_flags & (F_components_given | F_hpr_given)) ==
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(F_components_given | F_hpr_given)) {
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// If the transform was specified componentwise, compare them
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// componentwise.
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int c = _pos.compare_to(other._pos);
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@ -301,7 +302,33 @@ make_pos_hpr_scale(const LVecBase3f &pos, const LVecBase3f &hpr,
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state->_pos = pos;
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state->_hpr = hpr;
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state->_scale = scale;
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state->_flags = F_components_given | F_components_known | F_has_components;
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state->_flags = F_components_given | F_hpr_given | F_components_known | F_hpr_known | F_has_components;
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state->check_uniform_scale();
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return return_new(state);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::make_pos_quat_scale
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// Access: Published, Static
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// Description: Makes a new TransformState with the specified
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// components.
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////////////////////////////////////////////////////////////////////
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CPT(TransformState) TransformState::
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make_pos_quat_scale(const LVecBase3f &pos, const LQuaternionf &quat,
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const LVecBase3f &scale) {
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// Make a special-case check for the identity transform.
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if (pos == LVecBase3f(0.0f, 0.0f, 0.0f) &&
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quat == LQuaternionf::ident_quat() &&
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scale == LVecBase3f(1.0f, 1.0f, 1.0f)) {
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return make_identity();
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}
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TransformState *state = new TransformState;
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state->_pos = pos;
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state->_quat = quat;
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state->_scale = scale;
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state->_flags = F_components_given | F_quat_given | F_components_known | F_quat_known | F_has_components;
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state->check_uniform_scale();
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return return_new(state);
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}
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@ -333,10 +360,14 @@ make_mat(const LMatrix4f &mat) {
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////////////////////////////////////////////////////////////////////
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CPT(TransformState) TransformState::
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set_pos(const LVecBase3f &pos) const {
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if ((_flags & F_components_given) != 0) {
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if (components_given()) {
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// If we started with a componentwise transform, we keep it that
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// way.
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return make_pos_hpr_scale(pos, get_hpr(), get_scale());
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if (quat_given()) {
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return make_pos_quat_scale(pos, get_quat(), get_scale());
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} else {
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return make_pos_hpr_scale(pos, get_hpr(), get_scale());
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}
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} else {
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// Otherwise, we have a matrix transform, and we keep it that way.
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@ -350,7 +381,7 @@ set_pos(const LVecBase3f &pos) const {
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// Function: TransformState::set_hpr
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// Access: Published
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// Description: Returns a new TransformState object that represents the
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// original TransformState with its hpr component
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// original TransformState with its rotation component
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// replaced with the indicated value, if possible.
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////////////////////////////////////////////////////////////////////
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CPT(TransformState) TransformState::
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@ -359,6 +390,19 @@ set_hpr(const LVecBase3f &hpr) const {
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return make_pos_hpr_scale(get_pos(), hpr, get_scale());
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::set_quat
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// Access: Published
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// Description: Returns a new TransformState object that represents the
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// original TransformState with its rotation component
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// replaced with the indicated value, if possible.
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////////////////////////////////////////////////////////////////////
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CPT(TransformState) TransformState::
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set_quat(const LQuaternionf &quat) const {
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nassertr(has_components(), this);
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return make_pos_quat_scale(get_pos(), quat, get_scale());
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::set_scale
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// Access: Published
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@ -369,7 +413,11 @@ set_hpr(const LVecBase3f &hpr) const {
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CPT(TransformState) TransformState::
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set_scale(const LVecBase3f &scale) const {
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nassertr(has_components(), this);
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return make_pos_hpr_scale(get_pos(), get_hpr(), scale);
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if (quat_given()) {
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return make_pos_quat_scale(get_pos(), get_quat(), scale);
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} else {
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return make_pos_hpr_scale(get_pos(), get_hpr(), scale);
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}
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}
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////////////////////////////////////////////////////////////////////
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@ -549,13 +597,25 @@ output(ostream &out) const {
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out << lead << "pos " << get_pos();
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lead = ' ';
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}
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if (!get_hpr().almost_equal(LVecBase3f(0.0f, 0.0f, 0.0f))) {
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out << lead << "hpr " << get_hpr();
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lead = ' ';
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if (quat_given()) {
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if (!get_quat().almost_equal(LQuaternionf::ident_quat())) {
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out << lead << "quat " << get_quat();
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lead = ' ';
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}
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} else {
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if (!get_hpr().almost_equal(LVecBase3f(0.0f, 0.0f, 0.0f))) {
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out << lead << "hpr " << get_hpr();
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lead = ' ';
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}
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}
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if (!get_scale().almost_equal(LVecBase3f(1.0f, 1.0f, 1.0f))) {
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out << lead << "scale " << get_scale();
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lead = ' ';
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if (has_uniform_scale()) {
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out << lead << "scale " << get_uniform_scale();
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lead = ' ';
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} else {
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out << lead << "scale " << get_scale();
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lead = ' ';
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}
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}
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if (lead == '(') {
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out << "(almost identity)";
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@ -702,8 +762,9 @@ calc_components() {
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if ((_flags & F_is_identity) != 0) {
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_scale.set(1.0f, 1.0f, 1.0f);
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_hpr.set(0.0f, 0.0f, 0.0f);
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_quat = LQuaternionf::ident_quat();
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_pos.set(0.0f, 0.0f, 0.0f);
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_flags |= F_has_components;
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_flags |= F_has_components | F_components_known | F_hpr_known | F_quat_known | F_uniform_scale;
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} else {
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// If we don't have components and we're not identity, the only
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@ -712,16 +773,57 @@ calc_components() {
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const LMatrix4f &mat = get_mat();
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bool possible = decompose_matrix(mat, _scale, _hpr, _pos);
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if (possible) {
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// Some matrices can't be decomposed into scale, hpr, pos.
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_flags |= F_has_components;
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if (!possible) {
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// Some matrices can't be decomposed into scale, hpr, pos. In
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// this case, we now know that we cannot compute the components.
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_flags |= F_components_known | F_hpr_known | F_quat_known;
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// However, we can always get at least the pos.
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mat.get_row3(_pos, 3);
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} else {
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// Otherwise, we do have the components, or at least the hpr.
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_flags |= F_has_components | F_components_known | F_hpr_known;
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check_uniform_scale();
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}
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}
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_flags |= F_components_known;
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// However, we can always get at least the pos.
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mat.get_row3(_pos, 3);
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::calc_hpr
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// Access: Private
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// Description: Derives the hpr, from the matrix if necessary, or
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// from the quat.
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////////////////////////////////////////////////////////////////////
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void TransformState::
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calc_hpr() {
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nassertv((_flags & F_is_invalid) == 0);
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check_components();
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if ((_flags & F_hpr_known) == 0) {
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// If we don't know the hpr yet, we must have been given a quat.
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// Decompose it.
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nassertv((_flags & F_quat_known) != 0);
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_hpr = _quat.get_hpr();
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_flags |= F_hpr_known;
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TransformState::calc_quat
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// Access: Private
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// Description: Derives the quat from the hpr.
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////////////////////////////////////////////////////////////////////
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void TransformState::
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calc_quat() {
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nassertv((_flags & F_is_invalid) == 0);
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check_components();
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if ((_flags & F_quat_known) == 0) {
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// If we don't know the quat yet, we must have been given a hpr.
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// Decompose it.
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nassertv((_flags & F_hpr_known) != 0);
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_quat.set_hpr(_hpr);
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_flags |= F_quat_known;
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}
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}
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////////////////////////////////////////////////////////////////////
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@ -739,7 +841,7 @@ calc_mat() {
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// If we don't have a matrix and we're not identity, the only
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// other explanation is that we were constructed via components.
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nassertv((_flags & F_components_known) != 0);
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compose_matrix(_mat, _scale, _hpr, _pos);
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compose_matrix(_mat, _scale, get_hpr(), _pos);
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}
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_flags |= F_mat_known;
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}
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@ -778,10 +880,20 @@ write_datagram(BamWriter *manager, Datagram &dg) {
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} else if ((_flags & F_components_given) != 0) {
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// A component-based transform.
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int flags = F_components_given | F_components_known | F_has_components;
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if ((_flags & F_quat_given) != 0) {
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flags |= (F_quat_given | F_quat_known);
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} else if ((_flags & F_hpr_given) != 0) {
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||||
flags |= (F_hpr_given | F_hpr_known);
|
||||
}
|
||||
|
||||
dg.add_uint16(flags);
|
||||
|
||||
_pos.write_datagram(dg);
|
||||
_hpr.write_datagram(dg);
|
||||
if ((_flags & F_quat_given) != 0) {
|
||||
_quat.write_datagram(dg);
|
||||
} else {
|
||||
get_hpr().write_datagram(dg);
|
||||
}
|
||||
_scale.write_datagram(dg);
|
||||
|
||||
} else {
|
||||
@ -879,11 +991,19 @@ fillin(DatagramIterator &scan, BamReader *manager) {
|
||||
|
||||
_flags = scan.get_uint16();
|
||||
|
||||
if ((_flags & F_components_known) != 0) {
|
||||
if ((_flags & F_components_given) != 0) {
|
||||
// Componentwise transform.
|
||||
_pos.read_datagram(scan);
|
||||
_hpr.read_datagram(scan);
|
||||
if ((_flags & F_quat_given) != 0) {
|
||||
_quat.read_datagram(scan);
|
||||
} else {
|
||||
_hpr.read_datagram(scan);
|
||||
// Holdover support for bams 4.0 or older: add these bits that
|
||||
// should have been added when the bam was written.
|
||||
_flags |= (F_hpr_given | F_hpr_known);
|
||||
}
|
||||
_scale.read_datagram(scan);
|
||||
check_uniform_scale();
|
||||
}
|
||||
|
||||
if ((_flags & F_mat_known) != 0) {
|
||||
|
||||
@ -70,6 +70,7 @@ PUBLISHED:
|
||||
static CPT(TransformState) make_invalid();
|
||||
INLINE static CPT(TransformState) make_pos(const LVecBase3f &pos);
|
||||
INLINE static CPT(TransformState) make_hpr(const LVecBase3f &hpr);
|
||||
INLINE static CPT(TransformState) make_quat(const LQuaternionf &quat);
|
||||
INLINE static CPT(TransformState) make_pos_hpr(const LVecBase3f &pos,
|
||||
const LVecBase3f &hpr);
|
||||
INLINE static CPT(TransformState) make_scale(float scale);
|
||||
@ -77,6 +78,9 @@ PUBLISHED:
|
||||
static CPT(TransformState) make_pos_hpr_scale(const LVecBase3f &pos,
|
||||
const LVecBase3f &hpr,
|
||||
const LVecBase3f &scale);
|
||||
static CPT(TransformState) make_pos_quat_scale(const LVecBase3f &pos,
|
||||
const LQuaternionf &quat,
|
||||
const LVecBase3f &scale);
|
||||
static CPT(TransformState) make_mat(const LMatrix4f &mat);
|
||||
|
||||
INLINE bool is_identity() const;
|
||||
@ -84,17 +88,24 @@ PUBLISHED:
|
||||
INLINE bool is_singular() const;
|
||||
INLINE bool has_components() const;
|
||||
INLINE bool components_given() const;
|
||||
INLINE bool hpr_given() const;
|
||||
INLINE bool quat_given() const;
|
||||
INLINE bool has_pos() const;
|
||||
INLINE bool has_hpr() const;
|
||||
INLINE bool has_quat() const;
|
||||
INLINE bool has_scale() const;
|
||||
INLINE bool has_uniform_scale() const;
|
||||
INLINE bool has_mat() const;
|
||||
INLINE const LVecBase3f &get_pos() const;
|
||||
INLINE const LVecBase3f &get_hpr() const;
|
||||
INLINE const LQuaternionf &get_quat() const;
|
||||
INLINE const LVecBase3f &get_scale() const;
|
||||
INLINE float get_uniform_scale() const;
|
||||
INLINE const LMatrix4f &get_mat() const;
|
||||
|
||||
CPT(TransformState) set_pos(const LVecBase3f &pos) const;
|
||||
CPT(TransformState) set_hpr(const LVecBase3f &hpr) const;
|
||||
CPT(TransformState) set_quat(const LQuaternionf &quat) const;
|
||||
CPT(TransformState) set_scale(const LVecBase3f &scale) const;
|
||||
|
||||
CPT(TransformState) compose(const TransformState *other) const;
|
||||
@ -144,26 +155,38 @@ private:
|
||||
// This is the actual data within the TransformState.
|
||||
INLINE void check_singular() const;
|
||||
INLINE void check_components() const;
|
||||
INLINE void check_hpr() const;
|
||||
INLINE void check_quat() const;
|
||||
INLINE void check_mat() const;
|
||||
void calc_singular();
|
||||
void calc_components();
|
||||
void calc_hpr();
|
||||
void calc_quat();
|
||||
void calc_mat();
|
||||
|
||||
INLINE void check_uniform_scale();
|
||||
|
||||
INLINE void set_destructing();
|
||||
INLINE bool is_destructing() const;
|
||||
|
||||
enum Flags {
|
||||
F_is_identity = 0x0001,
|
||||
F_is_singular = 0x0002,
|
||||
F_singular_known = 0x0004,
|
||||
F_singular_known = 0x0004, // set if we know F_is_singular
|
||||
F_components_given = 0x0008,
|
||||
F_components_known = 0x0010,
|
||||
F_components_known = 0x0010, // set if we know F_has_components
|
||||
F_has_components = 0x0020,
|
||||
F_mat_known = 0x0040,
|
||||
F_mat_known = 0x0040, // set if _mat is defined
|
||||
F_is_invalid = 0x0080,
|
||||
F_quat_given = 0x0100,
|
||||
F_quat_known = 0x0200, // set if _quat is defined
|
||||
F_hpr_given = 0x0400,
|
||||
F_hpr_known = 0x0800, // set if _hpr is defined
|
||||
F_uniform_scale = 0x1000,
|
||||
F_is_destructing = 0x8000,
|
||||
};
|
||||
LVecBase3f _pos, _hpr, _scale;
|
||||
LQuaternionf _quat;
|
||||
LMatrix4f _mat;
|
||||
LMatrix4f *_inv_mat;
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user