Package prezoom.controller

Class CameraManager

java.lang.Object

prezoom.controller.CameraManager

public class CameraManager
extends Object

This class is the manager to manage all the camera related functions, including movement, info, states.

Author:

Zhijie Lan

create date: 2020/11/4 changed: Abhishek Sharma

updatedCameraInfo added to track if camera is updated

Field Summary

Fields

Modifier and Type	Field	Description
static CameraInfoI	cur_CamInfo	the info for the current state
static CameraInfoI	presentationCamera	the camera location used to navigate in the present canvas during presentation, but not affect the stored state camera
protected static ArrayList<CameraInfoI>	state_CamInfo_list	the array that stores info of each state
static boolean	updatedCameraInfo	if camera info updated sets it to true

Constructor Summary

Constructors

Constructor	Description
CameraManager()

Method Summary

Modifier and Type	Method	Description
static void	deleteCamState(int state)	delete a given state form state_CamInfo_list
static CameraInfoI	getCorrectCamera()	get the current camera info
private static CameraInfoI	getCur_CamInfoFromList()	get the camera info for the current state
private static int	getCurrent_State()	get the current state index
static void	initializePresentationCamera()	set the location of presentation camera
static void	insertCamState()	insert a new camera info of a new state into state_CamInfo_list at the current state index.
static void	moveCamera(Graphics2D g2)	move the camera to the stored location
static void	moveCamera(Graphics2D g2, double cam_x_offset, double cam_y_offset, double zoomFactor)	move the camera to the given location
static Point2D	toViewCoordinates(double wX, double wY)	from world coordinate to view coordinate according to current camera location
static Point2D	toWorldCoordinates(Point point)	from view coordinate to world coordinate according to current camera location
static void	updateCur_CamInfo()	update the cur_CamInfo.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

state_CamInfo_list

protected static ArrayList<CameraInfoI> state_CamInfo_list

the array that stores info of each state

cur_CamInfo

public static CameraInfoI cur_CamInfo

the info for the current state

updatedCameraInfo

public static boolean updatedCameraInfo

if camera info updated sets it to true

presentationCamera

public static CameraInfoI presentationCamera

the camera location used to navigate in the present canvas during presentation, but not affect the stored state camera

Constructor Detail

CameraManager

public CameraManager()

Method Detail

moveCamera

public static void moveCamera(Graphics2D g2,
                              double cam_x_offset,
                              double cam_y_offset,
                              double zoomFactor)

move the camera to the given location

Parameters:

g2 - the Graphics to paint

cam_x_offset - x offset

cam_y_offset - y offset

zoomFactor - zoom index

moveCamera

public static void moveCamera(Graphics2D g2)

move the camera to the stored location

Parameters:

g2 - the Graphics to paint

toWorldCoordinates

public static Point2D toWorldCoordinates(Point point)

from view coordinate to world coordinate according to current camera location

Parameters:

point - view coordinate

Returns:

world coordinate

toViewCoordinates

public static Point2D toViewCoordinates(double wX,
                                        double wY)

from world coordinate to view coordinate according to current camera location

Parameters:

wX - world coordinate X

wY - world coordinate Y

Returns:

view coordinate

initializePresentationCamera

public static void initializePresentationCamera()

set the location of presentation camera

getCurrent_State

private static int getCurrent_State()

get the current state index

Returns:

current state index

getCur_CamInfoFromList

private static CameraInfoI getCur_CamInfoFromList()

get the camera info for the current state

Returns:

the current camera info

getCorrectCamera

public static CameraInfoI getCorrectCamera()

get the current camera info

Returns:

cur_CamInfo if not presenting, presentationCamera if presenting

updateCur_CamInfo

public static void updateCur_CamInfo()

update the cur_CamInfo. and add interpolation from previous value to the current value

insertCamState

public static void insertCamState()

insert a new camera info of a new state into state_CamInfo_list at the current state index. The new camera info will clone the previous info of the current state

deleteCamState

public static void deleteCamState(int state)

delete a given state form state_CamInfo_list

Parameters:

state - the state to be deleted