Camera.h

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#pragma once
#include "Prerequisites.h"
#include "EngineUtilities\Vectors\Vector3.h"
 
class 
Camera {
public:
  Camera();
  ~Camera() = default;
 
  void 
  setLens(float fovYRadians, float aspectRatio, float nearPlane, float farPlane);
 
  void
  setPosition(float x, float y, float z);
 
  void
  setPosition(const EU::Vector3& pos);
 
  EU::Vector3 
  getPosition() const { return m_position; }
  
  EU::Vector3 &
  getPosition() { return m_position; }
 
  void
  lookAt(const EU::Vector3& pos,
         const EU::Vector3& target, 
         const EU::Vector3& up = EU::Vector3(0, 1, 0));
 
  void 
  walk(float d);
 
  void 
  strafe(float d);
 
  void 
  yaw(float radians);
 
  void 
  pitch(float radians);
 
  void 
  updateViewMatrix();
 
  XMMATRIX 
  getView() const { return XMLoadFloat4x4(&m_view); }
 
  XMMATRIX 
  getProj() const { return XMLoadFloat4x4(&m_proj); }
 
  XMMATRIX 
  GetViewNoTranslation() const {
    XMMATRIX v = getView();
    // Quitar traslación (fila 4)
    v.r[3] = XMVectorSet(0, 0, 0, 1);
    return v;
  }
 
  float getFovY()   const { return m_fovY; }
  float getAspect() const { return m_aspectRatio; }
  float getNearZ()  const { return m_nearPlane; }
  float getFarZ()   const { return m_farPlane; }
 
  EU::Vector3 GetRight()   const { return m_right; }
  EU::Vector3 GetUp()      const { return m_up; }
  EU::Vector3 GetForward() const { return m_forward; }
 
  inline EU::Vector3 
  FromXM(FXMVECTOR v) {
    XMFLOAT3 t;
    XMStoreFloat3(&t, v);
    return EU::Vector3(t.x, t.y, t.z);
  }
 
 
private:
  // Estado espacial
  EU::Vector3 m_position; 
  // Basis Ortonormal (en mundo)
  EU::Vector3 m_right   { 1.0f, 0.0f, 0.0f }; 
  EU::Vector3 m_up      { 0.0f, 1.0f, 0.0f }; 
  EU::Vector3 m_forward { 0.0f, 0.0f, 1.0f }; 
  // Matrices almacenadas
  XMFLOAT4X4 m_view {};
  XMFLOAT4X4 m_proj {};
 
  // Parametros de la proyeccion
  float m_fovY { XM_PIDIV4 }; 
  float m_aspectRatio = 1.0f; 
  float m_nearPlane = 0.01f; 
  float m_farPlane = 1000.0f; 
  bool m_viewDirty = true; 
};