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bonetransform.h « Graphics « Source - github.com/WolfireGames/overgrowth.git - Unnamed repository; edit this file 'description' to name the repository.
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//-----------------------------------------------------------------------------
//           Name: bonetransform.h
//      Developer: Wolfire Games LLC
//    Description: 
//        License: Read below
//-----------------------------------------------------------------------------
//
//
//   Copyright 2022 Wolfire Games LLC
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.
//
//-----------------------------------------------------------------------------
#pragma once

#include <Math/quaternions.h>

#include <vector>

struct BoneTransform {
    quaternion rotation;
    vec3 origin;

    BoneTransform(const mat4 &other);
    BoneTransform();

    const BoneTransform& operator=(const mat4 &other);
    mat4 GetMat4() const;
    void LoadIdentity();
};

BoneTransform invert(const BoneTransform& transform);
BoneTransform operator*( const BoneTransform& a, 
                               const BoneTransform& b );
vec3 operator*( const BoneTransform& a, 
                     const vec3& b );
bool operator==( const BoneTransform& a, 
                       const BoneTransform& b );
BoneTransform operator*( const quaternion& a, const BoneTransform& b );
BoneTransform mix(const BoneTransform &a,
                  const BoneTransform &b,
                  float alpha);

BoneTransform ApplyParentRotations(const std::vector<BoneTransform> &matrices, 
                                   int id, 
                                   const std::vector<int> &parents);