add assimp submodule

1 files changed, 679 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/AssetLib/Collada/ColladaHelper.h b/src/mesh/assimp-master/code/AssetLib/Collada/ColladaHelper.h
new file mode 100644
index 0000000..31d7b5a
--- /dev/null
+++ b/src/mesh/assimp-master/code/AssetLib/Collada/ColladaHelper.h
@@ -0,0 +1,679 @@
+/*
+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.
+
+----------------------------------------------------------------------
+*/
+
+/** Helper structures for the Collada loader */
+
+#ifndef AI_COLLADAHELPER_H_INC
+#define AI_COLLADAHELPER_H_INC
+
+#include <assimp/light.h>
+#include <assimp/material.h>
+#include <assimp/mesh.h>
+
+#include <cstdint>
+#include <map>
+#include <set>
+#include <vector>
+
+struct aiMaterial;
+
+namespace Assimp {
+namespace Collada {
+
+/// Collada file versions which evolved during the years ...
+enum FormatVersion {
+    FV_1_5_n,
+    FV_1_4_n,
+    FV_1_3_n
+};
+
+/// Transformation types that can be applied to a node
+enum TransformType {
+    TF_LOOKAT,
+    TF_ROTATE,
+    TF_TRANSLATE,
+    TF_SCALE,
+    TF_SKEW,
+    TF_MATRIX
+};
+
+/// Different types of input data to a vertex or face
+enum InputType {
+    IT_Invalid,
+    IT_Vertex, // special type for per-index data referring to the <vertices> element carrying the per-vertex data.
+    IT_Position,
+    IT_Normal,
+    IT_Texcoord,
+    IT_Color,
+    IT_Tangent,
+    IT_Bitangent
+};
+
+/// Supported controller types
+enum ControllerType {
+    Skin,
+    Morph
+};
+
+/// Supported morph methods
+enum MorphMethod {
+    Normalized,
+    Relative
+};
+
+/// Common metadata keys as <Collada, Assimp>
+using MetaKeyPair = std::pair<std::string, std::string>;
+using MetaKeyPairVector = std::vector<MetaKeyPair>;
+
+/// Collada as lower_case (native)
+const MetaKeyPairVector &GetColladaAssimpMetaKeys();
+
+// Collada as CamelCase (used by Assimp for consistency)
+const MetaKeyPairVector &GetColladaAssimpMetaKeysCamelCase();
+
+/// Convert underscore_separated to CamelCase "authoring_tool" becomes "AuthoringTool"
+void ToCamelCase(std::string &text);
+
+/// Contains all data for one of the different transformation types
+struct Transform {
+    std::string mID; ///< SID of the transform step, by which anim channels address their target node
+    TransformType mType;
+    ai_real f[16]; ///< Interpretation of data depends on the type of the transformation
+};
+
+/// A collada camera.
+struct Camera {
+    Camera() :
+            mOrtho(false),
+            mHorFov(10e10f),
+            mVerFov(10e10f),
+            mAspect(10e10f),
+            mZNear(0.1f),
+            mZFar(1000.f) {}
+
+    /// Name of camera
+    std::string mName;
+
+    /// True if it is an orthographic camera
+    bool mOrtho;
+
+    /// Horizontal field of view in degrees
+    ai_real mHorFov;
+
+    /// Vertical field of view in degrees
+    ai_real mVerFov;
+
+    /// Screen aspect
+    ai_real mAspect;
+
+    /// Near& far z
+    ai_real mZNear, mZFar;
+};
+
+#define ASSIMP_COLLADA_LIGHT_ANGLE_NOT_SET 1e9f
+
+/** A collada light source. */
+struct Light {
+    Light() :
+            mType(aiLightSource_UNDEFINED),
+            mAttConstant(1.f),
+            mAttLinear(0.f),
+            mAttQuadratic(0.f),
+            mFalloffAngle(180.f),
+            mFalloffExponent(0.f),
+            mPenumbraAngle(ASSIMP_COLLADA_LIGHT_ANGLE_NOT_SET),
+            mOuterAngle(ASSIMP_COLLADA_LIGHT_ANGLE_NOT_SET),
+            mIntensity(1.f) {}
+
+    /// Type of the light source aiLightSourceType + ambient
+    unsigned int mType;
+
+    /// Color of the light
+    aiColor3D mColor;
+
+    /// Light attenuation
+    ai_real mAttConstant, mAttLinear, mAttQuadratic;
+
+    /// Spot light falloff
+    ai_real mFalloffAngle;
+    ai_real mFalloffExponent;
+
+    // -----------------------------------------------------
+    // FCOLLADA extension from here
+
+    /// ... related stuff from maja and max extensions
+    ai_real mPenumbraAngle;
+    ai_real mOuterAngle;
+
+    /// Common light intensity
+    ai_real mIntensity;
+};
+
+/** Short vertex index description */
+struct InputSemanticMapEntry {
+    InputSemanticMapEntry() :
+            mSet(0),
+            mType(IT_Invalid) {}
+
+    /// Index of set, optional
+    unsigned int mSet;
+
+    /// Type of referenced vertex input
+    InputType mType;
+};
+
+/// Table to map from effect to vertex input semantics
+struct SemanticMappingTable {
+    /// Name of material
+    std::string mMatName;
+
+    /// List of semantic map commands, grouped by effect semantic name
+    using InputSemanticMap = std::map<std::string, InputSemanticMapEntry>;
+    InputSemanticMap mMap;
+
+    /// For std::find
+    bool operator==(const std::string &s) const {
+        return s == mMatName;
+    }
+};
+
+/// A reference to a mesh inside a node, including materials assigned to the various subgroups.
+/// The ID refers to either a mesh or a controller which specifies the mesh
+struct MeshInstance {
+    ///< ID of the mesh or controller to be instanced
+    std::string mMeshOrController;
+
+    ///< Map of materials by the subgroup ID they're applied to
+    std::map<std::string, SemanticMappingTable> mMaterials;
+};
+
+/// A reference to a camera inside a node
+struct CameraInstance {
+    ///< ID of the camera
+    std::string mCamera;
+};
+
+/// A reference to a light inside a node
+struct LightInstance {
+    ///< ID of the camera
+    std::string mLight;
+};
+
+/// A reference to a node inside a node
+struct NodeInstance {
+    ///< ID of the node
+    std::string mNode;
+};
+
+/// A node in a scene hierarchy
+struct Node {
+    std::string mName;
+    std::string mID;
+    std::string mSID;
+    Node *mParent;
+    std::vector<Node *> mChildren;
+
+    /// Operations in order to calculate the resulting transformation to parent.
+    std::vector<Transform> mTransforms;
+
+    /// Meshes at this node
+    std::vector<MeshInstance> mMeshes;
+
+    /// Lights at this node
+    std::vector<LightInstance> mLights;
+
+    /// Cameras at this node
+    std::vector<CameraInstance> mCameras;
+
+    /// Node instances at this node
+    std::vector<NodeInstance> mNodeInstances;
+
+    /// Root-nodes: Name of primary camera, if any
+    std::string mPrimaryCamera;
+
+    /// Constructor. Begin with a zero parent
+    Node() :
+            mParent(nullptr) {
+        // empty
+    }
+
+    /// Destructor: delete all children subsequently
+    ~Node() {
+        for (std::vector<Node *>::iterator it = mChildren.begin(); it != mChildren.end(); ++it) {
+            delete *it;
+        }
+    }
+};
+
+/// Data source array: either floats or strings
+struct Data {
+    bool mIsStringArray;
+    std::vector<ai_real> mValues;
+    std::vector<std::string> mStrings;
+};
+
+/// Accessor to a data array
+struct Accessor {
+    size_t mCount; // in number of objects
+    size_t mSize; // size of an object, in elements (floats or strings, mostly 1)
+    size_t mOffset; // in number of values
+    size_t mStride; // Stride in number of values
+    std::vector<std::string> mParams; // names of the data streams in the accessors. Empty string tells to ignore.
+    size_t mSubOffset[4]; // Sub-offset inside the object for the common 4 elements. For a vector, that's XYZ, for a color RGBA and so on.
+            // For example, SubOffset[0] denotes which of the values inside the object is the vector X component.
+    std::string mSource; // URL of the source array
+    mutable const Data *mData; // Pointer to the source array, if resolved. nullptr else
+
+    Accessor() {
+        mCount = 0;
+        mSize = 0;
+        mOffset = 0;
+        mStride = 0;
+        mData = nullptr;
+        mSubOffset[0] = mSubOffset[1] = mSubOffset[2] = mSubOffset[3] = 0;
+    }
+};
+
+/// A single face in a mesh
+struct Face {
+    std::vector<size_t> mIndices;
+};
+
+/// An input channel for mesh data, referring to a single accessor
+struct InputChannel {
+    InputType mType; // Type of the data
+    size_t mIndex; // Optional index, if multiple sets of the same data type are given
+    size_t mOffset; // Index offset in the indices array of per-face indices. Don't ask, can't explain that any better.
+    std::string mAccessor; // ID of the accessor where to read the actual values from.
+    mutable const Accessor *mResolved; // Pointer to the accessor, if resolved. nullptr else
+
+    InputChannel() {
+        mType = IT_Invalid;
+        mIndex = 0;
+        mOffset = 0;
+        mResolved = nullptr;
+    }
+};
+
+/// Subset of a mesh with a certain material
+struct SubMesh {
+    std::string mMaterial; ///< subgroup identifier
+    size_t mNumFaces; ///< number of faces in this sub-mesh
+};
+
+/// Contains data for a single mesh
+struct Mesh {
+    Mesh(const std::string &id) :
+            mId(id) {
+        for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
+            mNumUVComponents[i] = 2;
+        }
+    }
+
+    const std::string mId;
+    std::string mName;
+
+    // just to check if there's some sophisticated addressing involved...
+    // which we don't support, and therefore should warn about.
+    std::string mVertexID;
+
+    // Vertex data addressed by vertex indices
+    std::vector<InputChannel> mPerVertexData;
+
+    // actual mesh data, assembled on encounter of a <p> element. Verbose format, not indexed
+    std::vector<aiVector3D> mPositions;
+    std::vector<aiVector3D> mNormals;
+    std::vector<aiVector3D> mTangents;
+    std::vector<aiVector3D> mBitangents;
+    std::vector<aiVector3D> mTexCoords[AI_MAX_NUMBER_OF_TEXTURECOORDS];
+    std::vector<aiColor4D> mColors[AI_MAX_NUMBER_OF_COLOR_SETS];
+
+    unsigned int mNumUVComponents[AI_MAX_NUMBER_OF_TEXTURECOORDS];
+
+    // Faces. Stored are only the number of vertices for each face.
+    // 1 == point, 2 == line, 3 == triangle, 4+ == poly
+    std::vector<size_t> mFaceSize;
+
+    // Position indices for all faces in the sequence given in mFaceSize -
+    // necessary for bone weight assignment
+    std::vector<size_t> mFacePosIndices;
+
+    // Sub-meshes in this mesh, each with a given material
+    std::vector<SubMesh> mSubMeshes;
+};
+
+/// Which type of primitives the ReadPrimitives() function is going to read
+enum PrimitiveType {
+    Prim_Invalid,
+    Prim_Lines,
+    Prim_LineStrip,
+    Prim_Triangles,
+    Prim_TriStrips,
+    Prim_TriFans,
+    Prim_Polylist,
+    Prim_Polygon
+};
+
+/// A skeleton controller to deform a mesh with the use of joints
+struct Controller {
+    // controller type
+    ControllerType mType;
+
+    // Morphing method if type is Morph
+    MorphMethod mMethod;
+
+    // the URL of the mesh deformed by the controller.
+    std::string mMeshId;
+
+    // accessor URL of the joint names
+    std::string mJointNameSource;
+
+    ///< The bind shape matrix, as array of floats. I'm not sure what this matrix actually describes, but it can't be ignored in all cases
+    ai_real mBindShapeMatrix[16];
+
+    // accessor URL of the joint inverse bind matrices
+    std::string mJointOffsetMatrixSource;
+
+    // input channel: joint names.
+    InputChannel mWeightInputJoints;
+    // input channel: joint weights
+    InputChannel mWeightInputWeights;
+
+    // Number of weights per vertex.
+    std::vector<size_t> mWeightCounts;
+
+    // JointIndex-WeightIndex pairs for all vertices
+    std::vector<std::pair<size_t, size_t>> mWeights;
+
+    std::string mMorphTarget;
+    std::string mMorphWeight;
+};
+
+/// A collada material. Pretty much the only member is a reference to an effect.
+struct Material {
+    std::string mName;
+    std::string mEffect;
+};
+
+/// Type of the effect param
+enum ParamType {
+    Param_Sampler,
+    Param_Surface
+};
+
+/// A param for an effect. Might be of several types, but they all just refer to each other, so I summarize them
+struct EffectParam {
+    ParamType mType;
+    std::string mReference; // to which other thing the param is referring to.
+};
+
+/// Shading type supported by the standard effect spec of Collada
+enum ShadeType {
+    Shade_Invalid,
+    Shade_Constant,
+    Shade_Lambert,
+    Shade_Phong,
+    Shade_Blinn
+};
+
+/// Represents a texture sampler in collada
+struct Sampler {
+    Sampler() :
+            mWrapU(true),
+            mWrapV(true),
+            mMirrorU(),
+            mMirrorV(),
+            mOp(aiTextureOp_Multiply),
+            mUVId(UINT_MAX),
+            mWeighting(1.f),
+            mMixWithPrevious(1.f) {}
+
+    /// Name of image reference
+    std::string mName;
+
+    /// Wrap U?
+    bool mWrapU;
+
+    /// Wrap V?
+    bool mWrapV;
+
+    /// Mirror U?
+    bool mMirrorU;
+
+    /// Mirror V?
+    bool mMirrorV;
+
+    /// Blend mode
+    aiTextureOp mOp;
+
+    /// UV transformation
+    aiUVTransform mTransform;
+
+    /// Name of source UV channel
+    std::string mUVChannel;
+
+    /// Resolved UV channel index or UINT_MAX if not known
+    unsigned int mUVId;
+
+    // OKINO/MAX3D extensions from here
+    // -------------------------------------------------------
+
+    /// Weighting factor
+    ai_real mWeighting;
+
+    /// Mixing factor from OKINO
+    ai_real mMixWithPrevious;
+};
+
+/// A collada effect. Can contain about anything according to the Collada spec,
+/// but we limit our version to a reasonable subset.
+struct Effect {
+    /// Shading mode
+    ShadeType mShadeType;
+
+    /// Colors
+    aiColor4D mEmissive, mAmbient, mDiffuse, mSpecular,
+            mTransparent, mReflective;
+
+    /// Textures
+    Sampler mTexEmissive, mTexAmbient, mTexDiffuse, mTexSpecular,
+            mTexTransparent, mTexBump, mTexReflective;
+
+    /// Scalar factory
+    ai_real mShininess, mRefractIndex, mReflectivity;
+    ai_real mTransparency;
+    bool mHasTransparency;
+    bool mRGBTransparency;
+    bool mInvertTransparency;
+
+    /// local params referring to each other by their SID
+    using ParamLibrary = std::map<std::string, Collada::EffectParam>;
+    ParamLibrary mParams;
+
+    // MAX3D extensions
+    // ---------------------------------------------------------
+    // Double-sided?
+    bool mDoubleSided, mWireframe, mFaceted;
+
+    Effect() :
+            mShadeType(Shade_Phong),
+            mEmissive(0, 0, 0, 1),
+            mAmbient(0.1f, 0.1f, 0.1f, 1),
+            mDiffuse(0.6f, 0.6f, 0.6f, 1),
+            mSpecular(0.4f, 0.4f, 0.4f, 1),
+            mTransparent(0, 0, 0, 1),
+            mShininess(10.0f),
+            mRefractIndex(1.f),
+            mReflectivity(0.f),
+            mTransparency(1.f),
+            mHasTransparency(false),
+            mRGBTransparency(false),
+            mInvertTransparency(false),
+            mDoubleSided(false),
+            mWireframe(false),
+            mFaceted(false) {
+    }
+};
+
+/// An image, meaning texture
+struct Image {
+    std::string mFileName;
+
+    /// Embedded image data
+    std::vector<uint8_t> mImageData;
+
+    /// File format hint of embedded image data
+    std::string mEmbeddedFormat;
+};
+
+/// An animation channel.
+struct AnimationChannel {
+    /// URL of the data to animate. Could be about anything, but we support only the
+    /// "NodeID/TransformID.SubElement" notation
+    std::string mTarget;
+
+    /// Source URL of the time values. Collada calls them "input". Meh.
+    std::string mSourceTimes;
+    /// Source URL of the value values. Collada calls them "output".
+    std::string mSourceValues;
+    /// Source URL of the IN_TANGENT semantic values.
+    std::string mInTanValues;
+    /// Source URL of the OUT_TANGENT semantic values.
+    std::string mOutTanValues;
+    /// Source URL of the INTERPOLATION semantic values.
+    std::string mInterpolationValues;
+};
+
+/// An animation. Container for 0-x animation channels or 0-x animations
+struct Animation {
+    /// Anim name
+    std::string mName;
+
+    /// the animation channels, if any
+    std::vector<AnimationChannel> mChannels;
+
+    /// the sub-animations, if any
+    std::vector<Animation *> mSubAnims;
+
+    /// Destructor
+    ~Animation() {
+        for (std::vector<Animation *>::iterator it = mSubAnims.begin(); it != mSubAnims.end(); ++it) {
+            delete *it;
+        }
+    }
+
+    /// Collect all channels in the animation hierarchy into a single channel list.
+    void CollectChannelsRecursively(std::vector<AnimationChannel> &channels) {
+        channels.insert(channels.end(), mChannels.begin(), mChannels.end());
+
+        for (std::vector<Animation *>::iterator it = mSubAnims.begin(); it != mSubAnims.end(); ++it) {
+            Animation *pAnim = (*it);
+            pAnim->CollectChannelsRecursively(channels);
+        }
+    }
+
+    /// Combine all single-channel animations' channel into the same (parent) animation channel list.
+    void CombineSingleChannelAnimations() {
+        CombineSingleChannelAnimationsRecursively(this);
+    }
+
+    void CombineSingleChannelAnimationsRecursively(Animation *pParent) {
+        std::set<std::string> childrenTargets;
+        bool childrenAnimationsHaveDifferentChannels = true;
+
+        for (std::vector<Animation *>::iterator it = pParent->mSubAnims.begin(); it != pParent->mSubAnims.end();) {
+            Animation *anim = *it;
+            CombineSingleChannelAnimationsRecursively(anim);
+
+            if (childrenAnimationsHaveDifferentChannels && anim->mChannels.size() == 1 &&
+                    childrenTargets.find(anim->mChannels[0].mTarget) == childrenTargets.end()) {
+                childrenTargets.insert(anim->mChannels[0].mTarget);
+            } else {
+                childrenAnimationsHaveDifferentChannels = false;
+            }
+
+            ++it;
+        }
+
+        // We only want to combine animations if they have different channels
+        if (childrenAnimationsHaveDifferentChannels) {
+            for (std::vector<Animation *>::iterator it = pParent->mSubAnims.begin(); it != pParent->mSubAnims.end();) {
+                Animation *anim = *it;
+
+                pParent->mChannels.push_back(anim->mChannels[0]);
+
+                it = pParent->mSubAnims.erase(it);
+
+                delete anim;
+                continue;
+            }
+        }
+    }
+};
+
+/// Description of a collada animation channel which has been determined to affect the current node
+struct ChannelEntry {
+    const Collada::AnimationChannel *mChannel; ///< the source channel
+    std::string mTargetId;
+    std::string mTransformId; // the ID of the transformation step of the node which is influenced
+    size_t mTransformIndex; // Index into the node's transform chain to apply the channel to
+    size_t mSubElement; // starting index inside the transform data
+
+    // resolved data references
+    const Collada::Accessor *mTimeAccessor; ///> Collada accessor to the time values
+    const Collada::Data *mTimeData; ///> Source data array for the time values
+    const Collada::Accessor *mValueAccessor; ///> Collada accessor to the key value values
+    const Collada::Data *mValueData; ///> Source datat array for the key value values
+
+    ChannelEntry() :
+            mChannel(),
+            mTransformIndex(),
+            mSubElement(),
+            mTimeAccessor(),
+            mTimeData(),
+            mValueAccessor(),
+            mValueData() {}
+};
+
+} // end of namespace Collada
+} // end of namespace Assimp
+
+#endif // AI_COLLADAHELPER_H_INC