ScreenPanel to be drawn on the screen to draw the area where the game takes place. More...

#include <GamePanel.h>

Inheritance diagram for GamePanel:

Public Member Functions
	GamePanel (ALLEGRO_BITMAP back, ALLEGRO_BITMAP front, int x, int y, int width, int height)
	Creates a GamePanel from the given back and front buffers.
virtual void	draw (const Maze &maze, const list< PlayerCar > &players, const list< EnemyCar > &enemies, const list< Checkpoint > &checkpoints, const list< Rock > &rocks, const list< Smokescreen > &smokescreens, const list< DestroyedObjectPopup > &popups)
	Draws the given objects on the screen.
Private Member Functions
	GamePanel (const GamePanel &ref)
	Copy constructor not implemented, ScreenPanels should not be copied.
GamePanel &	operator= (const GamePanel &rhs)
	Assignment operator not implemented, ScreenPanels should not be copied.
float	getPanelX (const double &x) const
	Converts an x game coordinate value to its equivalent in pixels.
float	getPanelY (const double &y) const
	Converts a y game coordinate value to its equivalent in pixels.
void	draw (const Maze &maze)
	Draws a Maze on the screen.
void	draw (const GameObject &object)
	Draws a single GameObject on the screen.
Private Attributes
unsigned int	_mazeblockWidth
	The width of one (square) Maze block on the screen, in pixels.
float	_offsetX
	The amount that drawing should be offset to the right, recalculated every frame.
float	_offsetY
	The amount that drawing should be offset downwards, recalculated every frame.
BitmapStore	_bitmapStore
	Used to cache ALLEGRO_BITMAPs, so that they only need to be drawn once.
AllegroInit	_allegro
	Handles dependencies on Allegro.
Static Private Attributes
static const int	BLOCKS_PER_ROW = 15
	The number of Maze blocks in one row shown on the panel at a time. Used to determine the scale.

Detailed Description

ScreenPanel to be drawn on the screen to draw the area where the game takes place.

This includes the scrolling maze and all of the GameObjects.

Author:: Justin Wernick; David Schneider

Definition at line 23 of file GamePanel.h.

Constructor & Destructor Documentation

GamePanel::GamePanel	(	ALLEGRO_BITMAP *	back,
		ALLEGRO_BITMAP *	front,
		int	x,
		int	y,
		int	width,
		int	height
	)

Creates a GamePanel from the given back and front buffers.

The sub-bitmaps that GamePanel uses are created from a rectangular region on back and front that has its top left corner at the coordinate x,y, is width long in the x direction, and height long in the y direction.

Parameters:

[in]	back	The current back buffer of the display being sub-bitmapped.
[in]	front	The current front buffer (image currently being displayed) of the display being sub-bitmapped.
[in]	x	The x coordinate of the left side of the sub-bitmap in pixels.
[in]	y	The x coordinate of the top of the sub-bitmap in pixels.
[in]	width	The length in the x direction of the new sub-bitmap in pixels.
[in]	height	The length in the y direction of the new sub-bitmap in pixels.

Definition at line 3 of file GamePanel.cpp.

GamePanel::GamePanel ( const GamePanel & ref ) [private]

Copy constructor not implemented, ScreenPanels should not be copied.

Member Function Documentation

void GamePanel::draw	(	const Maze &	maze,
		const list< PlayerCar > &	players,
		const list< EnemyCar > &	enemies,
		const list< Checkpoint > &	checkpoints,
		const list< Rock > &	rocks,
		const list< Smokescreen > &	smokescreens,
		const list< DestroyedObjectPopup > &	popups
	)		`[virtual]`

Draws the given objects on the screen.

The drawing is offset so that the first entry in players is in the middle of the panel. However, the offset will never be such that the drawing area will be outside of the maze.

Parameters:

[in]	maze	The Maze that all of the objects are in.
[in]	players	The list of PlayerCars to be drawn.
[in]	enemies	The list of EnemyCars to be drawn.
[in]	checkpoints	The list of Checkpoints to be drawn.
[in]	rocks	The list of Rocks to be drawn.
[in]	smokescreens	The list of Smokescreens to be drawn.
[in]	popups	The list of DestroyedObjectPopups to be drawn.

Implements ScreenPanel.

Definition at line 12 of file GamePanel.cpp.

void GamePanel::draw ( const Maze & maze ) [private]

Draws a Maze on the screen.

Bitmaps used to represent solid and non-solid parts of the Maze are stored in the BitmapStore.

Parameters:

[in] maze The Maze to be drawn.

Definition at line 63 of file GamePanel.cpp.

void GamePanel::draw ( const GameObject & object ) [private]

Draws a single GameObject on the screen.

The bitmap to be drawn is retrieved from the BitmapStore using the GameObject's image.

Parameters:

[in] object The GameObject to be drawn.

Definition at line 92 of file GamePanel.cpp.

float GamePanel::getPanelX ( const double & x ) const [private]

Converts an x game coordinate value to its equivalent in pixels.

Converting to the pixel coordinates happens for every object every frame. To increase performance, the parameters are passed in by constant reference instead of by value.

Parameters:

[in] x The game coordinate to be converted into pixels.

Definition at line 126 of file GamePanel.cpp.

float GamePanel::getPanelY ( const double & y ) const [private]

Converts a y game coordinate value to its equivalent in pixels.

Converting to the pixel coordinates happens for every object every frame. To increase performance, the parameters are passed in by constant reference instead of by value.

Parameters:

[in] y The game coordinate to be converted into pixels.

Definition at line 130 of file GamePanel.cpp.

GamePanel& GamePanel::operator= ( const GamePanel & rhs ) [private]

Assignment operator not implemented, ScreenPanels should not be copied.