def drawObjectInPolygon( self, resourceType, polygon, rotation ):
matrix = cairo.Matrix()
matrix.scale( MapView.__pixelPerUnit, MapView.__pixelPerUnit )
x, y = polygon.center
width, height = GameItemTypes.getObjectSize( resourceType )
matrix.translate( width, height )
matrix.rotate( -rotation * math.pi / 4 )
matrix.translate( -x, -y )
pattern = PatternRepository.getPattern( "buildings", resourceType )
pattern.set_matrix( matrix )
self.ctx.set_source( pattern )
self.ctx.paint()
