OrbitCamera.h

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#pragma once
 
#include "Camera.h"
 
namespace dyno
{
    class OrbitCamera : public Camera {
 
    public:
        OrbitCamera();
        ~OrbitCamera() {};
 
        void rotateToPoint(float x, float y) override;
        void translateToPoint(float x, float y) override;
        void zoom(float amount) override;
 
        void registerPoint(float x, float y) override;
 
        Vec3f getViewDir() const;
        Vec3f getEyePos() const override;
        Vec3f getTargetPos() const override;
 
        void setEyePos(const Vec3f& p) override;
        void setTargetPos(const Vec3f& p) override;
 
        void getCoordSystem(Vec3f &view, Vec3f &up, Vec3f &right) const;
 
        glm::mat4 getViewMat() override;
        glm::mat4 getProjMat() override;
 
    private:
        void rotate(float dx, float dy);
        void translate(const Vec3f translation);
 
        Vec3f getPosition(float x, float y);
        Quat1f getQuaternion(float x1, float y1, float x2, float y2);
 
        Quat1f getQuaternion(float yaw, float pitch) const;
 
    private:
        float mRegX = 0.5f;
        float mRegY = 0.5f;
 
        //Auxiliary parameters to form a right-hand coordinate or left-hand side coordinate
        float mRotAngle = 0.0f;
        Vec3f mRotAxis = Vec3f(0.0f, 1.0f, 0.0f);
 
        float mYaw = 0.0f;      //along Y
        float mPitch = 0.0f;  //along axis X of the viewport coordinate system
 
        float mFocusDist;
 
        Vec3f mEyePos;
        Vec3f mTargetPos;
        
        float mFocusDistMax = 10.0f;
        float mFocusDistMin = 0.1f;
 
        float mSpeed = 2.0;
        float mZoomSpeed = 1.0f;
    };
 
}