int PacmanObject::CanMoveInDirection(int iDir)
{
if (m_pMainEngine->GetTileManager().GetValue(
m_iMapX + GetXDiffForDirection(iDir),
m_iMapY + GetYDiffForDirection(iDir)) != 1)
{
return 1;
}
else
{
return 0;
}
}
void PacmanObject::MoveInDirection(int iDir, int iCurrentTime)
{
if (CanMoveInDirection(iDir))
{
m_iMapX += GetXDiffForDirection(m_iDir);
m_iMapY += GetYDiffForDirection(m_iDir);
m_oMover.Setup(
m_iCurrentScreenX,
m_iCurrentScreenY,
GetScreenPosForMapX(m_iMapX),
GetScreenPosForMapY(m_iMapY),
iCurrentTime,
iCurrentTime+400);
}
}
void Demo4Object::DoUpdate( int iCurrentTime )
{
m_iPreviousScreenX = m_iCurrentScreenX;
m_iPreviousScreenY = m_iCurrentScreenY;
/********** EXTRA ********/
// Iterate through the objects
// We are looking for one which is too close to us
DisplayableObject* pObject;
for ( int iObjectId = 0 ;
(pObject = m_pMainEngine->GetDisplayableObject( iObjectId )
) != NULL ;
iObjectId++ )
{
if ( pObject == this ) // This is us, skip it
continue;
// If you need to cast to the sub-class type, you must use dynamic_cast, see lecture 19
// We are just using base class parts
int iXDiff = pObject->GetXCentre() - m_iCurrentScreenX;
int iYDiff = pObject->GetYCentre() - m_iCurrentScreenY;
// Estimate the size - by re-calculating it
int iTick = iCurrentTime/20; // 1 per 20ms
int iFrame = iTick % 30;
int iSize = 10 + iFrame;
if ( iFrame > 15 )
iSize = 10 + (30-iFrame);
int iSizeOther = iSize; // Assume both the same size
// Pythagorus' theorum:
if ( ((iXDiff*iXDiff)+(iYDiff*iYDiff))
< ((iSizeOther+iSize)*(iSizeOther+iSize)) )
{
// Move us to 1,1 and set direction right
m_iMapX = 1+rand()%13;
m_iMapY = 1+(rand()%2)*8;
m_iDir = 1; // Face right
m_oMover.Setup(
m_iMapX *50 + 25 + 25, //m_iCurrentScreenX,
m_iMapY *50 + 25 + 40, //m_iCurrentScreenY,
m_iMapX *50 + 25 + 25,
m_iMapY *50 + 25 + 40,
iCurrentTime,
iCurrentTime+400+rand()%200 );
// Ask the mover where the object should be
m_oMover.Calculate( iCurrentTime );
m_iCurrentScreenX = m_oMover.GetX();
m_iCurrentScreenY = m_oMover.GetY();
// Ensure that the object gets redrawn on the display, if something changed
RedrawObjects();
return;
}
}
/********** END EXTRA ********/
// If movement has finished
if ( m_oMover.HasMovementFinished(iCurrentTime) )
{
Demo4TileManager& tm = m_pMainEngine->GetTileManager();
// Handle any tile that we just moved onto
switch ( tm.GetValue( m_iMapX, m_iMapY ) )
{
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
tm.UpdateTile( m_pMainEngine, m_iMapX, m_iMapY,
tm.GetValue( m_iMapX, m_iMapY ) + 1 );
break;
case 8:
tm.UpdateTile( m_pMainEngine, m_iMapX, m_iMapY, 0 );
break;
}
// Set off a new movement
switch( rand() % 10 )
{
case 0: // Increase dir by 1
m_iDir = ( m_iDir + 1 )%4;
break;
case 1: // Reduce dir by 1
m_iDir = ( m_iDir + 3 )%4;
break;
}
// Allow some control over the object by the player
if ( m_pMainEngine->IsKeyPressed( SDLK_UP ) )
m_iDir = 0;
if ( m_pMainEngine->IsKeyPressed( SDLK_RIGHT ) )
m_iDir = 1;
if ( m_pMainEngine->IsKeyPressed( SDLK_DOWN ) )
m_iDir = 2;
if ( m_pMainEngine->IsKeyPressed( SDLK_LEFT ) )
m_iDir = 3;
switch ( tm.GetValue(
m_iMapX + GetXDiffForDirection(m_iDir),
m_iMapY + GetYDiffForDirection(m_iDir) ) )
{
case 0: // Passageway
case 2: // Pellet
case 3: // Pellet
case 4: // Pellet
case 5: // Pellet
case 6: // Pellet
case 7: // Pellet
case 8: // Pellet
// Allow move - set up new movement now
m_iMapX += GetXDiffForDirection(m_iDir);
m_iMapY += GetYDiffForDirection(m_iDir);
m_oMover.Setup(
m_iCurrentScreenX,
m_iCurrentScreenY,
m_iMapX *50 + 25 + 25,
m_iMapY *50 + 25 + 40,
iCurrentTime,
iCurrentTime+400+rand()%200 );
break;
case 1: // Wall
m_iDir = rand()%4; // Rotate randomly
break;
}
}
// If making a move then do the move
if ( !m_oMover.HasMovementFinished(iCurrentTime) )
{
// Ask the mover where the object should be
m_oMover.Calculate( iCurrentTime );
m_iCurrentScreenX = m_oMover.GetX();
m_iCurrentScreenY = m_oMover.GetY();
}
// Ensure that the object gets redrawn on the display, if something changed
RedrawObjects();
}
void Demo3ObjectFinished::DoUpdate( int iCurrentTime )
{
m_iPreviousScreenX = m_iCurrentScreenX;
m_iPreviousScreenY = m_iCurrentScreenY;
// If movement has finished
if ( m_oMover.HasMovementFinished(iCurrentTime) )
{
Demo3TileManager& tm = m_pMainEngine->GetTileManager();
// Handle any tile that we just moved onto
switch ( tm.GetValue( m_iMapX, m_iMapY ) )
{
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
tm.UpdateTile( m_pMainEngine, m_iMapX, m_iMapY,
tm.GetValue( m_iMapX, m_iMapY ) + 1 );
break;
case 8:
tm.UpdateTile( m_pMainEngine, m_iMapX, m_iMapY, 0 );
break;
}
// Set off a new movement
switch( rand() % 10 )
{
case 0: // Increase dir by 1
m_iDir = ( m_iDir + 1 )%4;
break;
case 1: // Reduce dir by 1
m_iDir = ( m_iDir + 3 )%4;
break;
}
if ( m_pMainEngine->IsKeyPressed( SDLK_UP ) )
m_iDir = 0;
if ( m_pMainEngine->IsKeyPressed( SDLK_RIGHT ) )
m_iDir = 1;
if ( m_pMainEngine->IsKeyPressed( SDLK_DOWN ) )
m_iDir = 2;
if ( m_pMainEngine->IsKeyPressed( SDLK_LEFT ) )
m_iDir = 3;
switch ( tm.GetValue(
m_iMapX + GetXDiffForDirection(m_iDir),
m_iMapY + GetYDiffForDirection(m_iDir) ) )
{
case 0: // Passageway
case 2: // Pellet
case 3: // Pellet
case 4: // Pellet
case 5: // Pellet
case 6: // Pellet
case 7: // Pellet
case 8: // Pellet
// Allow move - set up new movement now
m_iMapX += GetXDiffForDirection(m_iDir);
m_iMapY += GetYDiffForDirection(m_iDir);
m_oMover.Setup(
m_iCurrentScreenX,
m_iCurrentScreenY,
m_iMapX *50 + 25 + 25,
m_iMapY *50 + 25 + 40,
iCurrentTime,
iCurrentTime+400+rand()%200 );
break;
case 1: // Wall
m_iDir = rand()%4; // Rotate randomly
break;
}
}
// If making a move then do the move
if ( !m_oMover.HasMovementFinished(iCurrentTime) )
{
// Ask the mover where the object should be
m_oMover.Calculate( iCurrentTime );
m_iCurrentScreenX = m_oMover.GetX();
m_iCurrentScreenY = m_oMover.GetY();
}
// Ensure that the object gets redrawn on the display, if something changed
RedrawObjects();
}
void Demo3Object::DoUpdate( int iCurrentTime )
{
m_iPreviousScreenX = m_iCurrentScreenX;
m_iPreviousScreenY = m_iCurrentScreenY;
// If movement has finished
if ( m_oMover.HasMovementFinished(iCurrentTime) )
{
// INSERT POSITION A
// Set off a new movement
switch( rand() % 10 )
{
case 0: // Increase dir by 1
m_iDir = ( m_iDir + 1 )%4;
break;
case 1: // Reduce dir by 1
m_iDir = ( m_iDir + 3 )%4;
break;
}
// INSERT POSITION C
// REPLACE THE FOLLOWING CODE FOR CHANGE B
if ( m_iMapX + GetXDiffForDirection(m_iDir) > 14 )
m_iDir = 3;
if ( m_iMapX + GetXDiffForDirection(m_iDir) < 0 )
m_iDir = 1;
if ( m_iMapY + GetYDiffForDirection(m_iDir) > 10 )
m_iDir = 0;
if ( m_iMapY + GetYDiffForDirection(m_iDir) < 0 )
m_iDir = 2;
// Allow move - set up new movement now
m_iMapX += GetXDiffForDirection(m_iDir);
m_iMapY += GetYDiffForDirection(m_iDir);
m_oMover.Setup(
m_iCurrentScreenX,
m_iCurrentScreenY,
m_iMapX *50 + 25 + 25,
m_iMapY *50 + 25 + 40,
iCurrentTime,
iCurrentTime+400+rand()%200 );
// END OF REPLACE THE FOLLOWING CODE FOR CHANGE B
}
// If making a move then do the move
if ( !m_oMover.HasMovementFinished(iCurrentTime) )
{
// Ask the mover where the object should be
m_oMover.Calculate( iCurrentTime );
m_iCurrentScreenX = m_oMover.GetX();
m_iCurrentScreenY = m_oMover.GetY();
}
// Ensure that the object gets redrawn on the display, if something changed
RedrawObjects();
}
