AnimPose.h

//
//  AnimPose.h
//
//  Created by Anthony J. Thibault on 10/14/15.
//  Copyright (c) 2015 High Fidelity, Inc. All rights reserved.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
 
#ifndef hifi_AnimPose
#define hifi_AnimPose
 
#include <QtGlobal>
#include <QDebug>
#include <vector>
#include <glm/glm.hpp>
#include <glm/gtc/quaternion.hpp>
 
class AnimPose {
public:
    AnimPose() {}
    explicit AnimPose(const glm::mat4& mat);
 
    explicit AnimPose(const glm::quat& rotIn) : _scale(1.0f), _rot(rotIn), _trans(0.0f) {}
    AnimPose(const glm::quat& rotIn, const glm::vec3& transIn) : _scale(1.0f), _rot(rotIn), _trans(transIn) {}
    AnimPose(const glm::vec3& scaleIn, const glm::quat& rotIn, const glm::vec3& transIn) : _scale(scaleIn), _rot(rotIn), _trans(transIn) {}
 
    static const AnimPose identity;
 
    glm::vec3 xformPoint(const glm::vec3& rhs) const;
    glm::vec3 xformVector(const glm::vec3& rhs) const;  // really slow, but accurate for transforms with non-uniform scale
    glm::vec3 xformVectorFast(const glm::vec3& rhs) const;  // faster, but does not handle non-uniform scale correctly.
 
    glm::vec3 operator*(const glm::vec3& rhs) const; // same as xformPoint
    AnimPose operator*(const AnimPose& rhs) const;
 
    AnimPose inverse() const;
    AnimPose mirror() const;
    operator glm::mat4() const;
 
    const glm::vec3& scale() const { return _scale; }
    glm::vec3& scale() { return _scale; }
 
    const glm::quat& rot() const { return _rot; }
    glm::quat& rot() { return _rot; }
 
    const glm::vec3& trans() const { return _trans; }
    glm::vec3& trans() { return _trans; }
 
    void blend(const AnimPose& srcPose, float alpha);
 
private:
    friend QDebug operator<<(QDebug debug, const AnimPose& pose);
    glm::vec3 _scale { 1.0f };
    glm::quat _rot;
    glm::vec3 _trans;
};
 
inline QDebug operator<<(QDebug debug, const AnimPose& pose) {
    debug << "AnimPose, trans = (" << pose.trans().x << pose.trans().y << pose.trans().z << "), rot = (" << pose.rot().x << pose.rot().y << pose.rot().z << pose.rot().w << "), scale = (" << pose.scale().x << pose.scale().y << pose.scale().z << ")";
    return debug;
}
 
using AnimPoseVec = std::vector<AnimPose>;
 
#endif