private void InitializeGrid()
{
// fill tube grid
tubes[0, 0] = TubePiece.GetRandomPiece( rand );
for ( int c = 1; c < cols; ++c )
{
bool rightOpen = tubes[0, c - 1].RightOpen();
if ( c % 2 == 0 )
tubes[0, c] = TubePiece.GetRandomPieceLeft( rand, rightOpen );
else if ( rightOpen )
tubes[0, c] = new TubePiece( TubePattern.Cup, 1 );
}
for ( int r = 1; r < rows; ++r )
{
bool bottomOpen = tubes[r - 1, 0].BottomOpen();
if ( r % 2 == 0 )
tubes[r, 0] = TubePiece.GetRandomPieceTop( rand, bottomOpen );
else if ( bottomOpen )
tubes[r, 0] = new TubePiece( TubePattern.Cup, 0 );
}
for ( int r = 1; r < rows; ++r )
{
if ( r % 2 == 0 )
{
for ( int c = 1; c < cols; ++c )
{
bool rightOpen = tubes[r, c - 1].RightOpen();
bool bottomOpen = tubes[r - 1, c].BottomOpen();
if ( c % 2 == 0 )
tubes[r, c] = TubePiece.GetRandomPieceLeftTop( rand, rightOpen, bottomOpen );
else if ( rightOpen )
tubes[r, c] = new TubePiece( TubePattern.Cup, 1 );
}
}
else
{
for ( int c = 1; c < cols; ++c )
{
if ( ( c % 2 == 0 ) && tubes[r - 1, c].BottomOpen() )
tubes[r, c] = new TubePiece( TubePattern.Cup, 0 );
}
}
}
}
public override void Update( GameTime gameTime )
{
int nColors = colors.Length;
float timePerColor = 4f;
float time = Screen.AccumulatedTime;
float fakeTime = time / timePerColor;
int a = (int)( fakeTime ) % nColors;
int b = ( a + 1 ) % nColors;
float t = .5f + -(float)Math.Cos( (float)Math.PI * fakeTime ) / 2f;
if ( (int)fakeTime % 2 == 1 )
t = 1f - t;
// set color for tubes
Vector4 color = colors[a] + t * ( colors[b] - colors[a] );
foreach ( InstancedModel model in tubeModels )
{
ReadOnlyCollection<InstancedModelPart> parts = model.ModelParts;
int nParts = parts.Count;
for ( int i = 0; i < nParts; ++i )
{
InstancedModelPart part = parts[i];
part.EffectParameterColor.SetValue( color );
part.EffectParameterSpecularPower.SetValue( 200 );
}
}
while ( topLeft.Y > Screen.Camera.Position.Y + DeathLine )
{
int lowestRow = highestRow;
int secondLowestRow = ( highestRow + rows - 1 ) % rows;
highestRow = ( highestRow + 1 ) % rows;
topLeft.Y -= TubeSize;
// recreate row to fit with its new predecessor
if ( !cupRow )
{
tubes[lowestRow, 0] = TubePiece.GetRandomPieceTop( rand, tubes[secondLowestRow, 0].BottomOpen() );
for ( int c = 1; c < cols; ++c )
{
bool rightOpen = tubes[lowestRow, c - 1].RightOpen();
bool bottomOpen = tubes[secondLowestRow, c].BottomOpen();
if ( c % 2 == 0 )
tubes[lowestRow, c] = TubePiece.GetRandomPieceLeftTop( rand, rightOpen, bottomOpen );
else if ( tubes[lowestRow, c - 1].RightOpen() )
tubes[lowestRow, c] = new TubePiece( TubePattern.Cup, 1 );
else
tubes[lowestRow, c].Alive = false;
}
}
else
{
for ( int c = 0; c < cols; ++c )
{
if ( c % 2 == 0 )
{
if ( tubes[secondLowestRow, c].BottomOpen() )
tubes[lowestRow, c] = new TubePiece( TubePattern.Cup, 0 );
else
tubes[lowestRow, c].Alive = false;
}
else
{
tubes[lowestRow, c].Alive = false;
}
}
}
cupRow = !cupRow;
}
}