Qt+OpenGL——模型控制类实现

r囧r小猫 2023-03-06 03:55 7阅读 0赞

头文件

#ifndef GLMODELCTRL_H
    #define GLMODELCTRL_H
    
    #include <QVector2D>
    #include <QVector3D>
    #include <QMatrix4x4>
    #include <QObject>
    
    class GLModelCTRL : public QObject
    {
        
        Q_OBJECT
    public:
        explicit GLModelCTRL(QObject *parent = nullptr);
        ~GLModelCTRL();
    
        void translate(const float &x,const float &y,const float &z);
        void scale(const float &fScale);
        void rotate(const float &xMouseOffset,const float &yMouseOffset);
    
        void setRotateSpeed(const float &speed = float(2.0f));
    
        void resetModel();
        QMatrix4x4 getModel();
    
    private:
        QMatrix4x4 m_mat4Model;
        QVector3D m_v3Translate = QVector3D(0.0f,0.0f,0.0f);
        float m_fScale = 1.0f;
        float m_fRotateSpeed = 2.0f;
    };
    
    #endif // GLMODELCTRL_H

源文件

#include "glmodelctrl.h"
    #include <QtMath>
    
    GLModelCTRL::GLModelCTRL(QObject *parent) : QObject(parent)
    {
        
    
    }
    
    GLModelCTRL::~GLModelCTRL()
    {
        
    
    }
    
    void GLModelCTRL::translate(const float &x, const float &y, const float &z)
    {
        
        m_v3Translate += QVector3D(x,y,z);
        m_mat4Model.translate(m_v3Translate);
    }
    
    void GLModelCTRL::scale(const float &fScale)
    {
        
        m_fScale *= fScale;
        m_mat4Model.scale(fScale);
    }
    
    void GLModelCTRL::rotate(const float &xMouseOffset, const float &yMouseOffset)
    {
        
        double dDeltaX = xMouseOffset;
        double dDeltaY = -yMouseOffset;
    
        double dCosTheta = dDeltaX / qSqrt(qPow(dDeltaX,2) + qPow(dDeltaY,2));
        double dSinTheta = dDeltaY / qSqrt(qPow(dDeltaX,2) + qPow(dDeltaY,2));
    
        QVector3D axis(-dSinTheta,dCosTheta,0);
    
        double dAngle = sqrt(pow(dDeltaX,2) + pow(dDeltaY,2));
        QVector4D axis_2;
        QMatrix4x4 inverseModel = m_mat4Model.inverted();
        axis_2 = inverseModel * QVector4D(axis,0);
        m_mat4Model.rotate(qDegreesToRadians(dAngle * m_fRotateSpeed),axis_2.x(),axis_2.y(),axis_2.z());
    
    }
    
    void GLModelCTRL::setRotateSpeed(const float &speed)
    {
        
        m_fRotateSpeed = speed;
    }
    
    void GLModelCTRL::resetModel()
    {
        
        m_mat4Model = QMatrix4x4();
        m_fScale = 1.0f;
        m_v3Translate = QVector3D(0.0f,0.0f,0.0f);
    }
    
    QMatrix4x4 GLModelCTRL::getModel()
    {
        
        return m_mat4Model;
    }