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Node

Represents a 3D point in space with ID. It facilitates node creation, synchronization, and deletion.

Note.

All the codes below assumes the initial import and MAPI Key definition.

from midas_civil import *
MAPI_KEY('eyJ1ciI6InN1bWl0QG1pZGFzaXQuY29tIiwicGciO252a81571d')

Constructor

Node(x , y , z , id = 0 , merge = 1)

Parameters

  • x, y, z: Coordinates of the node.
  • id (default=0): Manually assign an ID. If 0, ID will be auto-assigned.
  • merge (default=1): If enabled, checks for existing nodes and return their IDs. No additional/duplicate node will be created.

Object Attributes

X, Y, Z: Coordinates of the node.

ID: Unique identifier.

Class Attributes

Node.nodes -> List of all nodes.

n1 = Node(0,1,2,10)    # Create Node at 0,1,2 with ID = 10
n2 = Node(0,3,4,20)    # Create Node at 0,3,4 with ID = 20

for n in Node.nodes:
    print(f' NODE ID = {n.ID} | X = {n.X} , Y = {n.Y} , Z = {n.Z}')

# Output :
# NODE ID = 10 | X = 0 , Y = 1 , Z = 2
# NODE ID = 20 | X = 0 , Y = 3 , Z = 4

Methods

Node.json

Returns a JSON representation of all Nodes defined in python.

n1 = Node(0,1,2,10)    # Create Node at 0,1,2 with ID = 10
n2 = Node(0,3,4,20)    # Create Node at 0,3,4 with ID = 20

print(Node.json())

# Output :
# {'Assign': {10: {'X': 0, 'Y': 1, 'Z': 2}, 20: {'X': 0, 'Y': 3, 'Z': 4}}}

Node.create

Sends the current node list to the Civil NX using a PUT request.
New nodes are created and existing nodes(same ID) in Civil NX will be updated.

n1 = Node(0,1,2,10)    # Create Node at 0,1,2 with ID = 10
n2 = Node(0,3,4,20)    # Create Node at 0,3,4 with ID = 20

Node.create()

Node.get

Fetches nodes from the Civil NX and return the JSON representation.
-Here, Civil model had 2 nodes 

print(Node.get())
# Output
# {'NODE': {'1': {'X': 1, 'Y': 2, 'Z': 3}, '2': {'X': 1, 'Y': 3, 'Z': 2}}}

Node.sync

Retrieves Node data from the Civil NX and rebuilds the internal node list.
-Here, Civil model had 2 nodes 

Node.sync()
for n in Node.nodes:
    print(f' NODE ID = {n.ID} | X = {n.X} , Y = {n.Y} , Z = {n.Z}')

# Output
# NODE ID = 1 | X = 1 , Y = 2 , Z = 3
# NODE ID = 2 | X = 1 , Y = 3 , Z = 2

Node.delete

Deletes all node data from both Python and Civil NX.

Node.delete()

Examples

1. Sine Grid

n=50
for j in range(n):
    for i in range(n):
        Node(i,j,2*(math.sin(i/5)+math.sin(j/5)),100*i+j+1)

Node.create()
NODE GRID

2. Sphere Nodes

import math
n=50
R=5
phi=0
for j in range(40):
    for i in range(n):
        theta = i*2*math.pi/n
        Node(R*math.sin(theta)*math.cos(phi),R*math.cos(theta),R*math.sin(theta)*math.sin(phi))

    phi+=math.pi/16

Node.create()
NODE GRID

3. Rotating Nodes

import math
n=50
R=5
phi=0
for j in range(40):
    for i in range(n):
        theta = i*2*math.pi/n
        Node(R*math.sin(theta)*math.cos(phi),R*math.cos(theta),R*math.sin(theta)*math.sin(phi),i+1)

    phi+=math.pi/16
    Node.create()
NODE GRID