/* ================================================================
RenderCamera
----------------
This header file describes the RenderCamera class.

A RenderCamera is the object responsible for providing a rendering position,
orientation, and perspective transformations. A RenderCamera exists within a
RenderScene and outputs all data to the friend class, RenderView.
================================================================ */
#ifndef RENDERCAMERA_HPP
#define RENDERCAMERA_HPP
#include "common.hpp"
#include "RenderView.hpp"
#include "Vec.hpp"
#include "Mat4.hpp"

class RenderCamera {
  friend class RenderScene;
  public:
    RenderCamera();
    ~RenderCamera();
    enum Flags {
      DIRTY = (1 << 1)
    };
    int setRenderView(RenderView *view);
    RenderView* getRenderView();
    void updateProjection(int width, int height);
    void doRefresh();
    int getRenderMode();
    void setRenderMode(int mode);
    Vec3 getPosition();
    void setPosition(float x, float y, float z);
    float getPitch();
    void setPitch(float pitch);
    float getYaw();
    void setYaw(float yaw);
    float getSize();
    Mat4 getModelview();
  private:
    int render_mode;          // 0 = perspective, 1 = orthogonal
    Vec3 position;            // The camera's coordinates in 3D space
    float pitch, yaw;         // The camera's basic orientation
    float fov_angle;          // The vertical FOV angle, used for perspective
    float size;               // The vertical units on screen, used for orthogonal
    float near, far;          // wherever you are
    int width, height;        // width/height of the projection
    RenderView *render_view;  // RenderView to render the scene to
    Mat4 p_matrix;            // Our camera's projection matrix
    Mat4 mv_matrix;           // modelview matrix
    int flags;                // set flags, such as DIRTY
};
#endif