Camera.h

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#pragma once
 
#include <glm/glm.hpp>
 
// TODO: we prefer not depend on Core library
#include <Vector.h>
#include <Quat.h>
 
#include "Primitive/Primitive3D.h"
 
namespace dyno
{
    typedef Quat<float> Quat1f;
 
    class Camera {
    public:
        Camera() {};
        ~Camera() {};
 
        enum ProjectionType
        {
            Perspective,
            Orthogonal
        };
 
        virtual glm::mat4 getViewMat() = 0;
        virtual glm::mat4 getProjMat() = 0;
 
        virtual void rotateToPoint(float x, float y) = 0;
        virtual void translateToPoint(float x, float y) = 0;
        virtual void zoom(float amount) = 0;
 
        virtual void registerPoint(float x, float y) = 0;
 
        void setWidth(int width) { mViewportWidth = width; }
        void setHeight(int height) { mViewportHeight = height; }
        
        void setClipNear(float zNear) { mNear = zNear; }
        void setClipFar(float zFar) { mFar = zFar; }
 
        int viewportWidth() const {    return mViewportWidth; }
        int viewportHeight() const { return mViewportHeight; }
 
        float clipNear() const { return mNear; }
        float clipFar() const { return mFar; }
 
        virtual void setEyePos(const Vec3f& p) = 0;
        virtual void setTargetPos(const Vec3f& p) = 0;
 
        virtual Vec3f getEyePos() const = 0;
        virtual Vec3f getTargetPos() const = 0;
 
        TRay3D<float> castRayInWorldSpace(float x, float y);
 
        void setUnitScale(float unit) { mUnitScale = unit; }
 
        float unitScale() { return mUnitScale; }
        
        void setProjectionType(ProjectionType type) { mProjectionType = type; }
        ProjectionType projectionType() { return mProjectionType; }
 
    protected:
        float mNear = 0.01f;
        float mFar = 10.0f;
        float mFov = 0.0f;
 
        int mViewportWidth;
        int mViewportHeight;
 
        ProjectionType mProjectionType = Perspective;   //0:pers 1:ortho
 
        //Distance unit
        float mUnitScale = 1.0f;
    };
 
}