class Terrain(mrc.Block):
"""Represents a single terrain piece placed in a level."""
#: Raw value for the x position of the left edge.
x_raw = mrc.UInt16_BE(0x00, bitmask=b'\x0f\xff')
#: If 1, blit image behind background.
draw_back = mrc.Bits(0x00, 0b10000000)
#: If 1, draw piece flipped vertically.
draw_upsidedown = mrc.Bits(0x00, 0b01000000)
#: If 1, draw piece as a hole.
draw_erase = mrc.Bits(0x00, 0b00100000)
#: Raw value (coarse component) for the y position of the top edge.
y_raw_coarse = mrc.Int8(0x02)
#: Raw value (fine component) for the y position of the top edge.
y_raw_fine = mrc.Bits(0x03, 0b10000000)
unknown_1 = mrc.Bits(0x03, 0b01000000)
#: Index of the TerrainInfo block in the accompanying GroundDAT.
obj_id = mrc.UInt8(0x03, bitmask=b'\x3f', range=range(0, 64))
@property
def x(self):
"""The x position of the left edge."""
return (self.x_raw - 16)
@property
def y(self):
"""The y position of the top edge."""
return (self.y_raw_coarse * 2 + self.y_raw_fine) - 4
@property
def repr(self):
return "obj_id={}, x={}, y={}".format(self.obj_id, self.x, self.y)
class Test(mrc.Block):
field1 = mrc.UInt16_BE(0x00)
field2 = mrc.Int32_LE()
field3 = mrc.Bits8(0x08, bits=0b00111100)
field4 = mrc.Bits8(0x08, bits=0b11000011)
field5 = mrc.Int8(enum=TestEnum)