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#include "GamePanel.h"
GamePanel::GamePanel(ALLEGRO_BITMAP* back, ALLEGRO_BITMAP* front, int x, int y, int width, int height)
:ScreenPanel(back, front, x, y, width, height),
_mazeblockWidth(_width/BLOCKS_PER_ROW),
_offsetX(0),
_offsetY(0),
_bitmapStore(_mazeblockWidth)
{
}
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)
{
ALLEGRO_BITMAP* prev_draw = al_get_target_bitmap();
al_set_target_bitmap(_back);
al_clear_to_color(BLANK);
float _maxOffsetX = getPanelX(maze.width()) - _width;
float _maxOffsetY = getPanelY(maze.height()) - _height;
if (!players.empty())
{
_offsetX = getPanelX(players.front().x()) - _width/2;
if (_offsetX < 0) _offsetX = 0;
else if (_offsetX > _maxOffsetX) _offsetX = _maxOffsetX;
_offsetY = getPanelY(players.front().y()) - _height/2;
if (_offsetY < 0) _offsetY = 0;
else if (_offsetY > _maxOffsetY) _offsetY = _maxOffsetY;
}
draw(maze);
for (list<PlayerCar>::const_iterator iter = players.begin(); iter != players.end(); ++iter)
{
draw(*iter);
}
for (list<EnemyCar>::const_iterator iter = enemies.begin(); iter != enemies.end(); ++iter)
{
draw(*iter);
}
for (list<Checkpoint>::const_iterator iter = checkpoints.begin(); iter != checkpoints.end(); ++iter)
{
draw(*iter);
}
for (list<Rock>::const_iterator iter = rocks.begin(); iter != rocks.end(); ++iter)
{
draw(*iter);
}
for (list<Smokescreen>::const_iterator iter = smokescreens.begin(); iter != smokescreens.end(); ++iter)
{
draw(*iter);
}
for (list<DestroyedObjectPopup>::const_iterator iter = popups.begin(); iter != popups.end(); ++iter)
{
draw(*iter);
}
al_set_target_bitmap(prev_draw);
}
void GamePanel::draw(const Maze& maze)
{
//only draws a parts of the maze that would appear on the screen
int minX = floor((_offsetX-_mazeblockWidth)/_mazeblockWidth);
int maxX = ceil((_offsetX+_width)/_mazeblockWidth);
int minY = floor((_offsetY-_mazeblockWidth)/_mazeblockWidth);
int maxY = ceil((_offsetY+_height)/_mazeblockWidth);
ALLEGRO_BITMAP* wallBitmap = _bitmapStore.getBitmap(BitmapStore::MAZE_WALL);
ALLEGRO_BITMAP* floorBitmap = _bitmapStore.getBitmap(BitmapStore::MAZE_FLOOR);
//used to only have one al_draw_bitmap command
ALLEGRO_BITMAP* currentBitmap = floorBitmap;
for (int x=minX; x<maxX&&x<maze.width(); ++x)
{
for (int y=minY; y<maxY&&y<maze.height(); ++y)
{
if (maze.getSolid(x,y))
{
currentBitmap = wallBitmap;
}
else
{
currentBitmap = floorBitmap;
}
al_draw_bitmap(currentBitmap, getPanelX(x)-_offsetX, getPanelY(y)-_offsetY, 0);
}
}
}
void GamePanel::draw(const GameObject& object)
{
//only draws a gameobject if it would appear on the screen
if (object.x() < (_offsetX-_mazeblockWidth)/_mazeblockWidth) return;
if (object.x() > (_offsetX+_width)/_mazeblockWidth) return;
if (object.y() < (_offsetY-_mazeblockWidth)/_mazeblockWidth) return;
if (object.y() > (_offsetY+_height)/_mazeblockWidth) return;
ALLEGRO_BITMAP* bitmap = _bitmapStore.getBitmap(object.image());
float angle = 0;
switch(object.facing())
{
case Maze::UP:
angle = 0;
break;
case Maze::RIGHT:
angle = ALLEGRO_PI/2;
break;
case Maze::DOWN:
angle = ALLEGRO_PI;
break;
case Maze::LEFT:
angle = 3*ALLEGRO_PI/2;
break;
}
float objectX = getPanelX(object.x());
float objectY = getPanelY(object.y());
float center = _mazeblockWidth/2;
al_draw_rotated_bitmap(bitmap, center , center , objectX+center-_offsetX, objectY+center-_offsetY, angle, 0);
}
float GamePanel::getPanelX(const double& x) const
{
return static_cast<float>(x*_mazeblockWidth);
}
float GamePanel::getPanelY(const double& y) const
{
return static_cast<float>(y*_mazeblockWidth);
}
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