Camera Class Reference

#include <Camera.hxx>

Inheritance diagram for Camera:

Collaboration diagram for Camera:

Public Member Functions
void	centerScreenOnPoint (const Point &isoCoordinates)
	Centers camera on given isometric coordinates. More...
void	centerScreenOnMapCenter ()
	Centers camera on the middle of the map. More...
void	increaseZoomLevel ()
	Increases the zoom level of the camera. More...
void	decreaseZoomLevel ()
	Decreases the zoom level of the camera. More...
void	changeZoomLevel (bool inc)
void	setPinchDistance (float pinchDistance, int isoX, int isoY)
	Sets the pinch distance for touch screens. More...
void	moveCamera (int xOffset, int yOffset)
	Move the camera in the given direction. More...
void	canMove (bool move)
const SDL_Point &	cameraOffset () const noexcept
const double &	zoomLevel () const noexcept
const SDL_Point &	tileSize () const noexcept
void	canScale (bool value)

Private Member Functions
	Camera ()=default
	~Camera ()=default

Private Attributes
friend	Singleton
float	m_PinchDistance = 0.f
SDL_Point	m_TileSize {32, 16}
SDL_Point	m_CameraOffset {0, 0}
double	m_ZoomLevel = 1.0
	the current zoom level of the camera More...
bool	m_canScale = true
bool	m_canMove = true
Point	m_CenterIsoCoordinates

Additional Inherited Members
Static Public Member Functions inherited from Singleton< Camera >
static Camera &	instance (void)
	Get an instance of the singleton. More...
Protected Member Functions inherited from Singleton< Camera >
	Singleton () noexcept=default
	~Singleton () noexcept=default

Detailed Description

Definition at line 9 of file Camera.hxx.

Constructor & Destructor Documentation

Camera()

Camera::Camera ( )

privatedefault

~Camera()

Camera::~Camera ( )

privatedefault

Member Function Documentation

cameraOffset()

const SDL_Point & Camera::cameraOffset ( ) const

noexcept

Definition at line 95 of file Camera.cxx.

{ return m_CameraOffset; }

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canMove()

void Camera::canMove ( bool  move )

inline

Definition at line 49 of file Camera.hxx.

{ m_canMove = move; }

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canScale()

void Camera::canScale ( bool  value )

inline

Definition at line 55 of file Camera.hxx.

{ m_canScale = value; }

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centerScreenOnMapCenter()

void Camera::centerScreenOnMapCenter

(

)

Centers camera on the middle of the map.

Definition at line 75 of file Camera.cxx.

{
  m_CenterIsoCoordinates = {Settings::instance().mapSize / 2, Settings::instance().mapSize / 2, 0, 0};
  centerScreenOnPoint(m_CenterIsoCoordinates);
  MapFunctions::instance().refreshVisibleMap();
}

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centerScreenOnPoint()

void Camera::centerScreenOnPoint

(

const Point &

isoCoordinates

)

Centers camera on given isometric coordinates.

Parameters

isoCoordinates

coordinates to center the camera on

Definition at line 56 of file Camera.cxx.

{
  if (isoCoordinates.isWithinMapBoundaries())
  {
    m_CenterIsoCoordinates = isoCoordinates;
    const SDL_Point screenCoordinates = convertIsoToScreenCoordinates(isoCoordinates, true);
 
    int x = static_cast<int>((screenCoordinates.x + (m_TileSize.x * m_ZoomLevel) * 0.5) - Settings::instance().screenWidth * 0.5);
    int y =
        static_cast<int>((screenCoordinates.y + (m_TileSize.y * m_ZoomLevel) * 0.25) - Settings::instance().screenHeight * 0.5);
 
    x -= static_cast<int>((m_TileSize.x * m_ZoomLevel) * 0.75);
    y -= static_cast<int>(m_TileSize.y * m_ZoomLevel);
 
    m_CameraOffset = {x, y};
    MapFunctions::instance().refreshVisibleMap();
  }
}

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changeZoomLevel()

void Camera::changeZoomLevel ( bool  inc )

inline

Definition at line 35 of file Camera.hxx.

{ inc ? increaseZoomLevel() : decreaseZoomLevel(); }

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decreaseZoomLevel()

void Camera::decreaseZoomLevel

(

)

Decreases the zoom level of the camera.

Definition at line 19 of file Camera.cxx.

{
  if (!m_canScale)
    return;
 
  if (m_ZoomLevel > 0.5)
  {
    m_ZoomLevel -= 0.5;
    centerScreenOnPoint(m_CenterIsoCoordinates);
    MapFunctions::instance().refreshVisibleMap();
  }
}

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increaseZoomLevel()

void Camera::increaseZoomLevel

(

)

Increases the zoom level of the camera.

Definition at line 6 of file Camera.cxx.

{
  if (!m_canScale)
    return;
 
  if (m_ZoomLevel < 4.0)
  {
    m_ZoomLevel += 0.5;
    centerScreenOnPoint(m_CenterIsoCoordinates);
    MapFunctions::instance().refreshVisibleMap();
  }
}

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moveCamera()

void Camera::moveCamera	(	int	xOffset,
		int	yOffset
	)

Move the camera in the given direction.

Definition at line 82 of file Camera.cxx.

{
  if (!m_canMove)
    return;
 
  m_CameraOffset.x -= xOffset;
  m_CameraOffset.y -= yOffset;
  MapFunctions::instance().refreshVisibleMap();
  // update center coordinates
  m_CenterIsoCoordinates =
      convertScreenToIsoCoordinates({Settings::instance().screenWidth / 2, Settings::instance().screenHeight / 2});
}

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setPinchDistance()

void Camera::setPinchDistance	(	float	pinchDistance,
		int	isoX,
		int	isoY
	)

Sets the pinch distance for touch screens.

Parameters

pinchDistance	the pinch distance
isoX	the x-center of the pinch
isoY	the y-center of the pinch

Definition at line 32 of file Camera.cxx.

{
  m_PinchDistance += pinchDistance;
 
  if (m_PinchDistance > 0.25F)
  {
    m_PinchDistance = 0;
    if (m_ZoomLevel < 4.0)
    {
      centerScreenOnPoint({isoX, isoY, 0, 0});
    }
    increaseZoomLevel();
  }
  else if (m_PinchDistance < -0.25F)
  {
    m_PinchDistance = 0;
    if (m_ZoomLevel > 0.5)
    {
      centerScreenOnPoint({isoX, isoY, 0, 0});
    }
    decreaseZoomLevel();
  }
}

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tileSize()

const SDL_Point & Camera::tileSize ( ) const

noexcept

Definition at line 99 of file Camera.cxx.

{ return m_TileSize; }

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zoomLevel()

const double & Camera::zoomLevel ( ) const

noexcept

Definition at line 97 of file Camera.cxx.

{ return m_ZoomLevel; }

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Member Data Documentation

m_CameraOffset

SDL_Point Camera::m_CameraOffset {0, 0}

private

Definition at line 63 of file Camera.hxx.

m_canMove

bool Camera::m_canMove = true

private

Definition at line 66 of file Camera.hxx.

m_canScale

bool Camera::m_canScale = true

private

Definition at line 65 of file Camera.hxx.

m_CenterIsoCoordinates

Point Camera::m_CenterIsoCoordinates

private

Definition at line 67 of file Camera.hxx.

m_PinchDistance

float Camera::m_PinchDistance = 0.f

private

Definition at line 61 of file Camera.hxx.

m_TileSize

SDL_Point Camera::m_TileSize {32, 16}

private

Definition at line 62 of file Camera.hxx.

m_ZoomLevel

double Camera::m_ZoomLevel = 1.0

private

the current zoom level of the camera

Definition at line 64 of file Camera.hxx.

Singleton

friend Camera::Singleton

private

Definition at line 11 of file Camera.hxx.

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The documentation for this class was generated from the following files:

• src/engine/basics/Camera.hxx
• src/engine/basics/Camera.cxx