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authorsanine <sanine.not@pm.me>2022-04-16 11:55:54 -0500
committersanine <sanine.not@pm.me>2022-04-16 11:55:54 -0500
commit8fb7916a0d0cb007a4c3a4e6a31af58765268ca3 (patch)
tree52b5524a94a5b04e17a1fd7f8aca988ab6d0c75f /src/mesh/assimp-master/tools/assimp_view/SceneAnimator.h
parentdb81b925d776103326128bf629cbdda576a223e7 (diff)
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-/*
----------------------------------------------------------------------------
-Open Asset Import Library (assimp)
----------------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the following
-conditions are met:
-
-* Redistributions of source code must retain the above
- copyright notice, this list of conditions and the
- following disclaimer.
-
-* Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the
- following disclaimer in the documentation and/or other
- materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
- contributors may be used to endorse or promote products
- derived from this software without specific prior
- written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------------
-*/
-
-/** @file SceneAnimator.h
- * Manages animations for a given scene and calculates present
- * transformations for all nodes
- */
-
-#ifndef AV_SCENEANIMATOR_H_INCLUDED
-#define AV_SCENEANIMATOR_H_INCLUDED
-
-#include <map>
-
-namespace AssimpView {
-
-// ---------------------------------------------------------------------------------
-/** A little tree structure to match the scene's node structure, but holding
- * additional data. Needs to be public to allow using it in templates at
- * certain compilers.
- */
-struct SceneAnimNode {
- std::string mName;
- SceneAnimNode *mParent;
- std::vector<SceneAnimNode *> mChildren;
-
- //! most recently calculated local transform
- aiMatrix4x4 mLocalTransform;
-
- //! same, but in world space
- aiMatrix4x4 mGlobalTransform;
-
- //! index in the current animation's channel array. -1 if not animated.
- int mChannelIndex;
-
- //! Default construction
- SceneAnimNode() :
- mName(), mParent(nullptr), mChildren(), mLocalTransform(), mGlobalTransform(), mChannelIndex(-1) {
- // empty
- }
-
- //! Construction from a given name
- SceneAnimNode(const std::string &pName) :
- mName(pName), mParent(nullptr), mChildren(), mLocalTransform(), mGlobalTransform(), mChannelIndex(-1) {
- // empty
- }
-
- //! Destruct all children recursively
- ~SceneAnimNode() {
- for (std::vector<SceneAnimNode *>::iterator it = mChildren.begin(); it != mChildren.end(); ++it) {
- delete *it;
- }
- }
-};
-
-// ---------------------------------------------------------------------------------
-/** Calculates the animated node transformations for a given scene and timestamp.
- *
- * Create an instance for a aiScene you want to animate and set the current animation
- * to play. You can then have the instance calculate the current pose for all nodes
- * by calling Calculate() for a given timestamp. After this you can retrieve the
- * present transformation for a given node by calling GetLocalTransform() or
- * GetGlobalTransform(). A full set of bone matrices can be retrieved by
- * GetBoneMatrices() for a given mesh.
- */
-class SceneAnimator {
-public:
- // ----------------------------------------------------------------------------
- /** Constructor for a given scene.
- *
- * The object keeps a reference to the scene during its lifetime, but
- * ownership stays at the caller.
- * @param pScene The scene to animate.
- * @param pAnimIndex [optional] Index of the animation to play. Assumed to
- * be 0 if not given.
- */
- SceneAnimator(const aiScene *pScene, size_t pAnimIndex = 0);
-
- /** Destructor */
- ~SceneAnimator();
-
- // ----------------------------------------------------------------------------
- /** Sets the animation to use for playback. This also recreates the internal
- * mapping structures, which might take a few cycles.
- * @param pAnimIndex Index of the animation in the scene's animation array
- */
- void SetAnimIndex(size_t pAnimIndex);
-
- // ----------------------------------------------------------------------------
- /** Calculates the node transformations for the scene. Call this to get
- * up-to-date results before calling one of the getters.
- * @param pTime Current time. Can be an arbitrary range.
- */
- void Calculate(double pTime);
-
- // ----------------------------------------------------------------------------
- /** Retrieves the most recent local transformation matrix for the given node.
- *
- * The returned matrix is in the node's parent's local space, just like the
- * original node's transformation matrix. If the node is not animated, the
- * node's original transformation is returned so that you can safely use or
- * assign it to the node itsself. If there is no node with the given name,
- * the identity matrix is returned. All transformations are updated whenever
- * Calculate() is called.
- * @param pNodeName Name of the node
- * @return A reference to the node's most recently calculated local
- * transformation matrix.
- */
- const aiMatrix4x4 &GetLocalTransform(const aiNode *node) const;
-
- // ----------------------------------------------------------------------------
- /** Retrieves the most recent global transformation matrix for the given node.
- *
- * The returned matrix is in world space, which is the same coordinate space
- * as the transformation of the scene's root node. If the node is not animated,
- * the node's original transformation is returned so that you can safely use or
- * assign it to the node itsself. If there is no node with the given name, the
- * identity matrix is returned. All transformations are updated whenever
- * Calculate() is called.
- * @param pNodeName Name of the node
- * @return A reference to the node's most recently calculated global
- * transformation matrix.
- */
- const aiMatrix4x4 &GetGlobalTransform(const aiNode *node) const;
-
- // ----------------------------------------------------------------------------
- /** Calculates the bone matrices for the given mesh.
- *
- * Each bone matrix transforms from mesh space in bind pose to mesh space in
- * skinned pose, it does not contain the mesh's world matrix. Thus the usual
- * matrix chain for using in the vertex shader is
- * @code
- * boneMatrix * worldMatrix * viewMatrix * projMatrix
- * @endcode
- * @param pNode The node carrying the mesh.
- * @param pMeshIndex Index of the mesh in the node's mesh array. The NODE's
- * mesh array, not the scene's mesh array! Leave out to use the first mesh
- * of the node, which is usually also the only one.
- * @return A reference to a vector of bone matrices. Stays stable till the
- * next call to GetBoneMatrices();
- */
- const std::vector<aiMatrix4x4> &GetBoneMatrices(const aiNode *pNode,
- size_t pMeshIndex = 0);
-
- // ----------------------------------------------------------------------------
- /** @brief Get the current animation index
- */
- size_t CurrentAnimIndex() const {
- return mCurrentAnimIndex;
- }
-
- // ----------------------------------------------------------------------------
- /** @brief Get the current animation or NULL
- */
- aiAnimation *CurrentAnim() const {
- return static_cast<unsigned int>(mCurrentAnimIndex) < mScene->mNumAnimations ? mScene->mAnimations[mCurrentAnimIndex] : NULL;
- }
-
-protected:
- /** Recursively creates an internal node structure matching the
- * current scene and animation.
- */
- SceneAnimNode *CreateNodeTree(aiNode *pNode, SceneAnimNode *pParent);
-
- /** Recursively updates the internal node transformations from the
- * given matrix array
- */
- void UpdateTransforms(SceneAnimNode *pNode, const std::vector<aiMatrix4x4> &pTransforms);
-
- /** Calculates the global transformation matrix for the given internal node */
- void CalculateGlobalTransform(SceneAnimNode *pInternalNode);
-
-protected:
- /** The scene we're operating on */
- const aiScene *mScene;
-
- /** Current animation index */
- int mCurrentAnimIndex;
-
- /** The AnimEvaluator we use to calculate the current pose for the current animation */
- AnimEvaluator *mAnimEvaluator;
-
- /** Root node of the internal scene structure */
- SceneAnimNode *mRootNode;
-
- /** Name to node map to quickly find nodes by their name */
- typedef std::map<const aiNode *, SceneAnimNode *> NodeMap;
- NodeMap mNodesByName;
-
- /** Name to node map to quickly find nodes for given bones by their name */
- typedef std::map<const char *, const aiNode *> BoneMap;
- BoneMap mBoneNodesByName;
-
- /** Array to return transformations results inside. */
- std::vector<aiMatrix4x4> mTransforms;
-};
-
-} // end of namespace AssimpView
-
-#endif // AV_SCENEANIMATOR_H_INCLUDED