+class WriteException(Exception):\r
+ pass\r
+\r
+\r
+class BinaryWriter(object):\r
+ def __init__(self, ios):\r
+ self.ios=ios\r
+\r
+ def write_bytes(self, v, size=None):\r
+ if size:\r
+ self.ios.write(struct.pack("={0}s".format(size), v))\r
+ else:\r
+ self.ios.write(v)\r
+\r
+ def write_float(self, v):\r
+ self.ios.write(struct.pack("f", v))\r
+\r
+ def write_uint(self, v, size):\r
+ if size==1:\r
+ self.ios.write(struct.pack("B", v))\r
+ elif size==2:\r
+ self.ios.write(struct.pack("H", v))\r
+ elif size==4:\r
+ self.ios.write(struct.pack("I", v))\r
+ else:\r
+ raise WriteError("invalid int uint size")\r
+\r
+ def write_vector2(self, v):\r
+ self.ios.write(struct.pack("=2f", v.x, v.y))\r
+\r
+ def write_vector3(self, v):\r
+ self.ios.write(struct.pack("=3f", v.x, v.y, v.z))\r
+\r
+ def write_rgb(self, v):\r
+ self.ios.write(struct.pack("=3f", v.r, v.g, v.b))\r
+\r
+ def write_rgba(self, v):\r
+ self.ios.write(struct.pack("=4f", v.r, v.g, v.b, v.a))\r
+\r
+\r