private void Paint()
{
if (!layers.HasLayerSelected)
{
return;
}
if (!tilesets.HasTilesetSelected)
{
return;
}
// Get brush bucket.
BrushBucket brushBucket = brushBuckets[tilesets.SelectedTileset];
// Return if no brush is selected or it cant be used for painting.
if (!brushBucket.HasBrushSelected)
{
return;
}
if (!brushBucket.SelectedBrush.CanPaint())
{
return;
}
int fromX = Mouse.GetState().X;
int fromY = Mouse.GetState().Y;
// Check that mouse is inside editors view port.
if (!SpriteBatch.GraphicsDevice.Viewport.Bounds.Contains(fromX, fromY))
{
return;
}
// Calculate index.
fromX = fromX / tileEngine.TileSizeInPixels.X;
fromY = fromY / tileEngine.TileSizeInPixels.Y;
// Check that the index is in bounds.
if (fromX < 0 || fromX >= layers.SelectedLayer.Width)
{
return;
}
if (fromY < 0 || fromY >= layers.SelectedLayer.Height)
{
return;
}
// Get brush and paint with it.
TileBrush brush = brushBucket.SelectedBrush;
// Transform position relative to the layer.
fromX -= layers.SelectedLayer.X / tileEngine.TileSizeInPixels.X;
fromY -= layers.SelectedLayer.Y / tileEngine.TileSizeInPixels.Y;
int toX = fromX + brush.Width;
toX = toX >= layers.SelectedLayer.Width ? layers.SelectedLayer.Width : toX;
int toY = fromY + brush.Height;
toY = toY >= layers.SelectedLayer.Height ? layers.SelectedLayer.Height : toY;
// Begin paint.
brush.BeginPainting();
for (int i = fromY; i < toY; i++)
{
// Check if brush has finished painting.
if (!brush.Painting())
{
return;
}
for (int j = fromX; j < toX; j++)
{
// Check if brush has finished painting.
if (!brush.Painting())
{
return;
}
PaintArgs paintArgs = brush.Paint();
layers.SelectedLayer.TileAtIndex(j, i).Paint(paintArgs);
}
}
// End paint.
brush.EndPainting();
}
