How to use the mcpi.minecraft.Vec3 function in mcpi

    def __init__(self, mc, position=minecraft.Vec3(0, 0, 0)):
        # set defaults
        self.mc = mc
        # start position
        self.startposition = position
        # set turtle position
        self.position = position
        # set turtle angles
        self.heading = 0
        self.verticalheading = 0
        # set pen down
        self._pendown = True
        # set pen block to black wool
        self._penblock = block.Block(block.WOOL.id, 15)
        # flying to true
        self.flying = True
        # set speed

def angleToTextDirection(angle):
    direction = int(round((angle % 360) / 45))
    if direction == 0:
        return minecraft.Vec3(-1,0,0)
    elif direction == 1:
        return minecraft.Vec3(-1,0,-1)
    elif direction == 2:
        return minecraft.Vec3(0,0,-1)
    elif direction == 3:
        return minecraft.Vec3(1,0,-1)
    elif direction == 4:
        return minecraft.Vec3(1,0,0)
    elif direction == 5:
        return minecraft.Vec3(1,0,1)
    elif direction == 6:
        return minecraft.Vec3(0,0,1)
    else:
        return minecraft.Vec3(-1,0,1)

if (yd >= 0):
                        y += sy
                        yd -= ax
                    if (zd >= 0):
                        z += sz
                        zd -= ax
                    x += sx
                    yd += ay
                    zd += az
            # y dominant
            elif (ay >= MAX(ax, az)):
                xd = ax - (ay >> 1)
                zd = az - (ay >> 1)
                loop = True
                while(loop):
                    vertices.append(minecraft.Vec3(x, y, z))
                    if (y == y2):
                        loop=False
                    if (xd >= 0):
                        x += sx
                        xd -= ay
                    if (zd >= 0):
                        z += sz
                        zd -= ay
                    y += sy
                    xd += ax
                    zd += az
            # z dominant
            elif(az >= MAX(ax, ay)):
                xd = ax - (az >> 1)
                yd = ay - (az >> 1)
                loop = True

mcDrawing = MinecraftDrawing(mc)

#line
mcDrawing.drawLine(0,0,-10,-10,10,-5,block.STONE.id)

#circle
mcDrawing.drawCircle(-15,15,-15,10,block.WOOD.id)

#sphere
mcDrawing.drawSphere(-15,15,-15,5,block.OBSIDIAN.id)

#face - solid triangle
faceVertices = []
faceVertices.append(minecraft.Vec3(0,0,0))
faceVertices.append(minecraft.Vec3(5,10,0))
faceVertices.append(minecraft.Vec3(10,0,0))
mcDrawing.drawFace(faceVertices, True, block.SNOW_BLOCK.id)

#face - wireframe square - using Points
faceVertices = Points()
faceVertices.add(0,0,5)
faceVertices.add(10,0,5)
faceVertices.add(10,10,5)
faceVertices.add(0,10,5)
mcDrawing.drawFace(faceVertices, False, block.DIAMOND_BLOCK.id)

#face - 5 sided shape
faceVertices = []
faceVertices.append(minecraft.Vec3(0,15,0))
faceVertices.append(minecraft.Vec3(5,15,5))
faceVertices.append(minecraft.Vec3(3,15,10))
faceVertices.append(minecraft.Vec3(-3,15,10))

def angleToTextDirection(angle):
    direction = int(round((angle % 360) / 45))
    if direction == 0:
        return minecraft.Vec3(-1,0,0)
    elif direction == 1:
        return minecraft.Vec3(-1,0,-1)
    elif direction == 2:
        return minecraft.Vec3(0,0,-1)
    elif direction == 3:
        return minecraft.Vec3(1,0,-1)
    elif direction == 4:
        return minecraft.Vec3(1,0,0)
    elif direction == 5:
        return minecraft.Vec3(1,0,1)
    elif direction == 6:
        return minecraft.Vec3(0,0,1)
    else:
        return minecraft.Vec3(-1,0,1)

def __init__(self, x, y, z, blockType, blockData = 0, tag = ""):
        #persist data
        self.blockType = blockType
        self.blockData = blockData

        #store the positions
        # original pos
        self.originalPos = minecraft.Vec3(x, y, z)
        # relative pos - block position relatively to other shape blocks
        self.relativePos = minecraft.Vec3(x, y, z)
        # actual pos - actual block position in the world
        self.actualPos = minecraft.Vec3(x, y, z)

        #the tag system is used to give a particular block inside a shape meaning
        # e.g. for an animal shape you could tag the block which is its head
        self.tag = tag

        # the mc block object
        self.mcBlock = block.Block(blockType, blockData)

def __init__(self, x, y, z, blockType, blockData = 0, tag = ""):
        #persist data
        self.blockType = blockType
        self.blockData = blockData

        #store the positions
        # original pos
        self.originalPos = minecraft.Vec3(x, y, z)
        # relative pos - block position relatively to other shape blocks
        self.relativePos = minecraft.Vec3(x, y, z)
        # actual pos - actual block position in the world
        self.actualPos = minecraft.Vec3(x, y, z)

        #the tag system is used to give a particular block inside a shape meaning
        # e.g. for an animal shape you could tag the block which is its head
        self.tag = tag

        # the mc block object
        self.mcBlock = block.Block(blockType, blockData)

#create drawing object
mcDrawing = MinecraftDrawing(mc)

#line
mcDrawing.drawLine(0,0,-10,-10,10,-5,block.STONE.id)

#circle
mcDrawing.drawCircle(-15,15,-15,10,block.WOOD.id)

#sphere
mcDrawing.drawSphere(-15,15,-15,5,block.OBSIDIAN.id)

#face - solid triangle
faceVertices = []
faceVertices.append(minecraft.Vec3(0,0,0))
faceVertices.append(minecraft.Vec3(5,10,0))
faceVertices.append(minecraft.Vec3(10,0,0))
mcDrawing.drawFace(faceVertices, True, block.SNOW_BLOCK.id)

#face - wireframe square - using Points
faceVertices = Points()
faceVertices.add(0,0,5)
faceVertices.add(10,0,5)
faceVertices.add(10,10,5)
faceVertices.add(0,10,5)
mcDrawing.drawFace(faceVertices, False, block.DIAMOND_BLOCK.id)

#face - 5 sided shape
faceVertices = []
faceVertices.append(minecraft.Vec3(0,15,0))
faceVertices.append(minecraft.Vec3(5,15,5))

# Minecraft Graphics Turtle(End)
                # Minecraft Stuff(Start)
                elif msg[1] == 'stuff:drawLine':
                    mcDrawing.drawLine(int(mcpiX1), int(mcpiY1), int(mcpiZ1), int(mcpiX), int(mcpiY), int(mcpiZ), blockTypeId, blockData)
                    print "mcDrawing.drawLine: (%d, %d, %d, %d, %d, %d, %d, %d)" % (mcpiX1, mcpiY1, mcpiZ1, mcpiX, mcpiY, mcpiZ, blockTypeId, blockData)
                elif msg[1] == 'stuff:drawSphere':
                    mcDrawing.drawSphere(mcpiX, mcpiY, mcpiZ, radius, blockTypeId, blockData)
                    print "mcDrawing.drawSphere: (%d, %d, %d, %d, %d, %d)" % (mcpiX, mcpiY, mcpiZ, radius, blockTypeId, blockData)
                elif msg[1] == 'drawCircle':
                    mcDrawing.drawCircle(mcpiX, mcpiY, mcpiZ, radius, blockTypeId, blockData)
                    print "mcDrawing.drawCircle: (%d, %d, %d, %d, %d, %d)" % (mcpiX, mcpiY, mcpiZ, radius, blockTypeId, blockData)
                elif msg[1] == 'stuff:resetShapePoints':
                    shapePoints = []
                    mcDrawing = stuff.MinecraftDrawing(mc)
                elif msg[1] == 'stuff:setShapePoints':
                    shapePoints.append(minecraft.Vec3(int(x1), int(y1), int(z1)))
                    print "append.shapePoints:"
                    print ' '.join(str(p) for p in shapePoints)
                elif msg[1] == 'stuff:drawFace':
                    if (fill == 'True'):
                        fillFlag = True
                    elif (fill == 'False'):
                        fillFlag = False
                        mcDrawing.drawFace(shapePoints, fillFlag, blockTypeId)
                        print "mcDrawing.drawFace:"
                        print ' '.join(str(p) for p in shapePoints)
                        print(fill)
                        print(blockTypeId)
                # Minecraft Stuff(End)

                elif msg[1] == 'setBlocks':
                    if (is_number(mcpiX0) and is_number(mcpiY0) and is_number(mcpiZ0) and is_number(mcpiX1) and is_number(mcpiY1) and is_number(mcpiZ1) and is_number(blockTypeId) and is_number(blockData)):

faceVertices.append(minecraft.Vec3(10,0,0))
mcDrawing.drawFace(faceVertices, True, block.SNOW_BLOCK.id)

#face - wireframe square - using Points
faceVertices = Points()
faceVertices.add(0,0,5)
faceVertices.add(10,0,5)
faceVertices.add(10,10,5)
faceVertices.add(0,10,5)
mcDrawing.drawFace(faceVertices, False, block.DIAMOND_BLOCK.id)

#face - 5 sided shape
faceVertices = []
faceVertices.append(minecraft.Vec3(0,15,0))
faceVertices.append(minecraft.Vec3(5,15,5))
faceVertices.append(minecraft.Vec3(3,15,10))
faceVertices.append(minecraft.Vec3(-3,15,10))
faceVertices.append(minecraft.Vec3(-5,15,5))
mcDrawing.drawFace(faceVertices, True, block.GOLD_BLOCK.id)