419 lines
16 KiB
C++
419 lines
16 KiB
C++
// Filename: transformState.h
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// Created by: drose (25Feb02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#ifndef TRANSFORMSTATE_H
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#define TRANSFORMSTATE_H
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#include "pandabase.h"
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#include "nodeCachedReferenceCount.h"
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#include "pointerTo.h"
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#include "luse.h"
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#include "event.h"
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#include "updateSeq.h"
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#include "pStatCollector.h"
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#include "geomEnums.h"
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#include "lightReMutex.h"
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#include "lightReMutexHolder.h"
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#include "lightMutex.h"
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#include "lightMutexHolder.h"
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#include "config_pgraph.h"
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#include "deletedChain.h"
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#include "simpleHashMap.h"
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#include "cacheStats.h"
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class GraphicsStateGuardianBase;
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class FactoryParams;
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////////////////////////////////////////////////////////////////////
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// Class : TransformState
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// Description : Indicates a coordinate-system transform on vertices.
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// TransformStates are the primary means for storing
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// transformations on the scene graph.
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//
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// Transforms may be specified in one of two ways:
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// componentwise, with a pos-hpr-scale, or with an
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// arbitrary transform matrix. If you specify a
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// transform componentwise, it will remember its
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// original components.
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//
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// TransformState objects are managed very much like
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// RenderState objects. They are immutable and
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// reference-counted automatically.
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//
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// You should not attempt to create or modify a
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// TransformState object directly. Instead, call one of
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// the make() functions to create one for you. And
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// instead of modifying a TransformState object, create a
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// new one.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PGRAPH TransformState : public NodeCachedReferenceCount {
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protected:
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TransformState();
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private:
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TransformState(const TransformState ©);
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void operator = (const TransformState ©);
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public:
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virtual ~TransformState();
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ALLOC_DELETED_CHAIN(TransformState);
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PUBLISHED:
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INLINE bool operator < (const TransformState &other) const;
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INLINE int compare_to(const TransformState &other) const;
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int compare_to(const TransformState &other, bool uniquify_matrix) const;
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INLINE size_t get_hash() const;
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static CPT(TransformState) make_identity();
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static CPT(TransformState) make_invalid();
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INLINE static CPT(TransformState) make_pos(const LVecBase3 &pos);
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INLINE static CPT(TransformState) make_hpr(const LVecBase3 &hpr);
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INLINE static CPT(TransformState) make_quat(const LQuaternion &quat);
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INLINE static CPT(TransformState) make_pos_hpr(const LVecBase3 &pos,
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const LVecBase3 &hpr);
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INLINE static CPT(TransformState) make_scale(PN_stdfloat scale);
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INLINE static CPT(TransformState) make_scale(const LVecBase3 &scale);
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INLINE static CPT(TransformState) make_shear(const LVecBase3 &shear);
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INLINE static CPT(TransformState) make_pos_hpr_scale(const LVecBase3 &pos,
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const LVecBase3 &hpr,
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const LVecBase3 &scale);
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INLINE static CPT(TransformState) make_pos_quat_scale(const LVecBase3 &pos,
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const LQuaternion &quat,
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const LVecBase3 &scale);
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static CPT(TransformState) make_pos_hpr_scale_shear(const LVecBase3 &pos,
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const LVecBase3 &hpr,
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const LVecBase3 &scale,
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const LVecBase3 &shear);
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static CPT(TransformState) make_pos_quat_scale_shear(const LVecBase3 &pos,
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const LQuaternion &quat,
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const LVecBase3 &scale,
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const LVecBase3 &shear);
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static CPT(TransformState) make_mat(const LMatrix4 &mat);
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INLINE static CPT(TransformState) make_pos2d(const LVecBase2 &pos);
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INLINE static CPT(TransformState) make_rotate2d(PN_stdfloat rotate);
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INLINE static CPT(TransformState) make_pos_rotate2d(const LVecBase2 &pos,
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PN_stdfloat rotate);
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INLINE static CPT(TransformState) make_scale2d(PN_stdfloat scale);
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INLINE static CPT(TransformState) make_scale2d(const LVecBase2 &scale);
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INLINE static CPT(TransformState) make_shear2d(PN_stdfloat shear);
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INLINE static CPT(TransformState) make_pos_rotate_scale2d(const LVecBase2 &pos,
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PN_stdfloat rotate,
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const LVecBase2 &scale);
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static CPT(TransformState) make_pos_rotate_scale_shear2d(const LVecBase2 &pos,
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PN_stdfloat rotate,
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const LVecBase2 &scale,
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PN_stdfloat shear);
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static CPT(TransformState) make_mat3(const LMatrix3 &mat);
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INLINE bool is_identity() const;
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INLINE bool is_invalid() const;
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INLINE bool is_singular() const;
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INLINE bool is_2d() const;
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INLINE bool has_components() const;
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INLINE bool components_given() const;
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INLINE bool hpr_given() const;
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INLINE bool quat_given() const;
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INLINE bool has_pos() const;
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INLINE bool has_hpr() const;
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INLINE bool has_quat() const;
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INLINE bool has_scale() const;
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INLINE bool has_identity_scale() const;
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INLINE bool has_uniform_scale() const;
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INLINE bool has_shear() const;
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INLINE bool has_nonzero_shear() const;
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INLINE bool has_mat() const;
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INLINE const LPoint3 &get_pos() const;
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INLINE const LVecBase3 &get_hpr() const;
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INLINE const LQuaternion &get_quat() const;
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INLINE const LQuaternion &get_norm_quat() const;
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INLINE const LVecBase3 &get_scale() const;
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INLINE PN_stdfloat get_uniform_scale() const;
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INLINE const LVecBase3 &get_shear() const;
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INLINE const LMatrix4 &get_mat() const;
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INLINE LVecBase2 get_pos2d() const;
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INLINE PN_stdfloat get_rotate2d() const;
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INLINE LVecBase2 get_scale2d() const;
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INLINE PN_stdfloat get_shear2d() const;
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INLINE LMatrix3 get_mat3() const;
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CPT(TransformState) set_pos(const LVecBase3 &pos) const;
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CPT(TransformState) set_hpr(const LVecBase3 &hpr) const;
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CPT(TransformState) set_quat(const LQuaternion &quat) const;
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CPT(TransformState) set_scale(const LVecBase3 &scale) const;
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CPT(TransformState) set_shear(const LVecBase3 &shear) const;
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CPT(TransformState) set_pos2d(const LVecBase2 &pos) const;
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CPT(TransformState) set_rotate2d(PN_stdfloat rotate) const;
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CPT(TransformState) set_scale2d(const LVecBase2 &scale) const;
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CPT(TransformState) set_shear2d(PN_stdfloat shear) const;
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CPT(TransformState) compose(const TransformState *other) const;
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CPT(TransformState) invert_compose(const TransformState *other) const;
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INLINE CPT(TransformState) get_inverse() const;
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INLINE CPT(TransformState) get_unique() const;
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INLINE int get_geom_rendering(int geom_rendering) const;
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virtual bool unref() const;
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INLINE void cache_ref() const;
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INLINE bool cache_unref() const;
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INLINE void node_ref() const;
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INLINE bool node_unref() const;
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INLINE int get_composition_cache_num_entries() const;
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INLINE int get_invert_composition_cache_num_entries() const;
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INLINE int get_composition_cache_size() const;
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INLINE const TransformState *get_composition_cache_source(int n) const;
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INLINE const TransformState *get_composition_cache_result(int n) const;
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INLINE int get_invert_composition_cache_size() const;
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INLINE const TransformState *get_invert_composition_cache_source(int n) const;
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INLINE const TransformState *get_invert_composition_cache_result(int n) const;
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bool validate_composition_cache() const;
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#ifdef HAVE_PYTHON
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PyObject *get_composition_cache() const;
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PyObject *get_invert_composition_cache() const;
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#endif // HAVE_PYTHON
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void output(ostream &out) const;
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void write(ostream &out, int indent_level) const;
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void write_composition_cache(ostream &out, int indent_level) const;
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static int get_num_states();
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static int get_num_unused_states();
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static int clear_cache();
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static int garbage_collect();
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static void list_cycles(ostream &out);
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static void list_states(ostream &out);
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static bool validate_states();
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#ifdef HAVE_PYTHON
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static PyObject *get_states();
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static PyObject *get_unused_states();
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#endif // HAVE_PYTHON
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public:
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static void init_states();
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INLINE static void flush_level();
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private:
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INLINE bool do_cache_unref() const;
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INLINE bool do_node_unref() const;
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class CompositionCycleDescEntry {
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public:
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INLINE CompositionCycleDescEntry(const TransformState *obj,
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const TransformState *result,
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bool inverted);
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const TransformState *_obj;
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const TransformState *_result;
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bool _inverted;
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};
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typedef pvector<CompositionCycleDescEntry> CompositionCycleDesc;
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static CPT(TransformState) return_new(TransformState *state);
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static CPT(TransformState) return_unique(TransformState *state);
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CPT(TransformState) do_compose(const TransformState *other) const;
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CPT(TransformState) store_compose(const TransformState *other, const TransformState *result);
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CPT(TransformState) do_invert_compose(const TransformState *other) const;
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CPT(TransformState) store_invert_compose(const TransformState *other, const TransformState *result);
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void detect_and_break_cycles();
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static bool r_detect_cycles(const TransformState *start_state,
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const TransformState *current_state,
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int length, UpdateSeq this_seq,
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CompositionCycleDesc *cycle_desc);
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static bool r_detect_reverse_cycles(const TransformState *start_state,
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const TransformState *current_state,
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int length, UpdateSeq this_seq,
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CompositionCycleDesc *cycle_desc);
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void release_new();
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void remove_cache_pointers();
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private:
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// This mutex protects _states. It also protects any modification
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// to the cache, which is encoded in _composition_cache and
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// _invert_composition_cache.
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static LightReMutex *_states_lock;
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class Empty {
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};
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typedef SimpleHashMap<const TransformState *, Empty, indirect_compare_to_hash<const TransformState *> > States;
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static States *_states;
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static CPT(TransformState) _identity_state;
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static CPT(TransformState) _invalid_state;
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// This iterator records the entry corresponding to this
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// TransformState object in the above global set. We keep the index
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// around so we can remove it when the TransformState destructs.
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int _saved_entry;
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// This data structure manages the job of caching the composition of
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// two TransformStates. It's complicated because we have to be sure to
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// remove the entry if *either* of the input TransformStates destructs.
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// To implement this, we always record Composition entries in pairs,
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// one in each of the two involved TransformState objects.
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// The first element of the map is the object we compose with. This
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// is not reference counted within this map; instead we store a
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// companion pointer in the other object, and remove the references
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// explicitly when either object destructs.
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class Composition {
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public:
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INLINE Composition();
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INLINE Composition(const Composition ©);
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// _result is reference counted if and only if it is not the same
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// pointer as this.
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const TransformState *_result;
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};
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typedef SimpleHashMap<const TransformState *, Composition, pointer_hash> CompositionCache;
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CompositionCache _composition_cache;
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CompositionCache _invert_composition_cache;
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// This is used to mark nodes as we visit them to detect cycles.
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UpdateSeq _cycle_detect;
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static UpdateSeq _last_cycle_detect;
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// This keeps track of our current position through the garbage
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// collection cycle.
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static int _garbage_index;
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static PStatCollector _cache_update_pcollector;
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static PStatCollector _garbage_collect_pcollector;
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static PStatCollector _transform_compose_pcollector;
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static PStatCollector _transform_invert_pcollector;
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static PStatCollector _transform_calc_pcollector;
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static PStatCollector _transform_break_cycles_pcollector;
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static PStatCollector _transform_new_pcollector;
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static PStatCollector _transform_validate_pcollector;
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static PStatCollector _transform_hash_pcollector;
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static PStatCollector _node_counter;
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static PStatCollector _cache_counter;
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private:
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// This is the actual data within the TransformState.
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INLINE void check_hash() const;
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INLINE void check_singular() const;
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INLINE void check_components() const;
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INLINE void check_hpr() const;
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INLINE void check_quat() const;
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INLINE void check_norm_quat() const;
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INLINE void check_mat() const;
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INLINE void calc_hash();
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void do_calc_hash();
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void calc_singular();
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INLINE void calc_components();
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void do_calc_components();
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INLINE void calc_hpr();
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void do_calc_hpr();
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void calc_quat();
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void calc_norm_quat();
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INLINE void calc_mat();
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void do_calc_mat();
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INLINE void check_uniform_scale();
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INLINE void check_uniform_scale2d();
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INLINE void set_destructing();
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INLINE bool is_destructing() const;
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INLINE void consider_update_pstats(int old_referenced_bits) const;
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static void update_pstats(int old_referenced_bits, int new_referenced_bits);
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enum Flags {
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F_is_identity = 0x00000001,
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F_is_singular = 0x00000002,
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F_singular_known = 0x00000004, // set if we know F_is_singular
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F_components_given = 0x00000008,
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F_components_known = 0x00000010, // set if we know F_has_components
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F_has_components = 0x00000020,
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F_mat_known = 0x00000040, // set if _mat is defined
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F_is_invalid = 0x00000080,
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F_quat_given = 0x00000100,
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F_quat_known = 0x00000200, // set if _quat is defined
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F_hpr_given = 0x00000400,
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F_hpr_known = 0x00000800, // set if _hpr is defined
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F_uniform_scale = 0x00001000,
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F_identity_scale = 0x00002000,
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F_has_nonzero_shear = 0x00004000,
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F_is_destructing = 0x00008000,
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F_is_2d = 0x00010000,
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F_hash_known = 0x00020000,
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F_norm_quat_known = 0x00040000,
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};
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LPoint3 _pos;
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LVecBase3 _hpr, _scale, _shear;
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LQuaternion _quat, _norm_quat;
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LMatrix4 _mat;
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LMatrix4 *_inv_mat;
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size_t _hash;
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unsigned int _flags;
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// This mutex protects _flags, and all of the above computed values.
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LightMutex _lock;
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static CacheStats _cache_stats;
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public:
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static void register_with_read_factory();
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virtual void write_datagram(BamWriter *manager, Datagram &dg);
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static PT(TypedWritableReferenceCount) change_this(TypedWritableReferenceCount *old_ptr, BamReader *manager);
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protected:
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static TypedWritable *make_from_bam(const FactoryParams ¶ms);
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void fillin(DatagramIterator &scan, BamReader *manager);
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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NodeCachedReferenceCount::init_type();
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register_type(_type_handle, "TransformState",
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NodeCachedReferenceCount::get_class_type());
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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};
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INLINE ostream &operator << (ostream &out, const TransformState &state) {
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state.output(out);
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return out;
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}
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#include "transformState.I"
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#endif
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