Model.morphnodesmatrixdiffenvelope#

Model.morphnodesmatrixdiffenvelope(m_collection, e_collection, f_collection, matrix_array, integ, mbias, fbias, envelope, undisplayed)#

Reorients the selected nodes by taking the difference between two matrices positioned with respect to the global coordinate system. For each node, the position relative to the initial matrix is found and then relocated to the same relative position with respect to the final matrix. The fixed nodes are held in place and the affected elements (or all unfixed nodes in the model if integ is 3, 6, or 7) are stretched according to the value of integ.

Temporary handles are created for all moving and fixed nodes to determine the stretching of the affected elements. If integ=0, a general domain is temporarily created for the affected elements. If integ=1, the domains currently in the model are used. If integ=2, 1D, 2D, 3D, and edge domains are temporarily created for the affected elements but the 2D domains are not partitioned. If integ=3, then handle influences are applied using a spatial relationship rather than through a domain. If integ=4, only the selected moving nodes are moved and all others are held fixed. If integ=5, 1D, 2D, 3D, and edge domains are temporarily created for the affected elements and the 2D domains are partitioned. Any handles created due to partitioning are moved based on their distance from the moving and fixed nodes. If integ=6, then handle influences are applied using the Kriging algorithm. If integ=7, then handle influences extend only up to a given distance (if envelope>0) or a given multiple of the applied perturbations (if envelope<0) away from the moving nodes.

The bias factors function as they would for handles except that all moving nodes will have the mbias value and all fixed nodes will have the fbias value.

If integ is set to 3, 6, or 7, nodes on undisplayed elements and components can be morphed, fixed, or excluded depending on the value sent in for undisplayed.

Parameters:

m_collection (Collection) – The collection containing the moving node entities.
e_collection (Collection) – The collection containing the affected element entities.
f_collection (Collection) – The collection containing the fixed node entities.
matrix_array (hwDoubleList) –
The list containing the two 4x4 matrices where the first matrix is at the final orientation and the second matrix is at the initial orientation. The matrices have the following format:

[rxx rxy rxz 0 ryx ryy ryz 0 rzx rzy rzz 0 tx ty tz 1]
integ (int) –
0 - Free edges (a single general domain)

1 - Use existing domains

2 - Inferred edges (1D, 2D, 3D, and edge domains - no partitioning)

3 - Morph all nodes using a proximity algorithm

4 - Morph all moving nodes and fix the unselected nodes

5 - Partitioned edges (1D, 2D, 3D, and edge domains with partitioning)

6 - Morph all nodes algorithm using the Kriging algorithm

7 - Morph all nodes within an envelope around the moving nodes
mbias (double) – Bias factor of moving nodes.
fbias (double) – Bias factor of fixed nodes.
envelope (double) –
If positive, all nodes beyond the given distance away from the moving nodes will be fixed. If integ=7, the distance given defines an envelope around the moving nodes within which the morphing of those nodes will linearly taper from fully matching the nearest moving node to zero at the edge of the envelope. If any fixed nodes are within the envelope they will also reduce the morphing of nearby nodes.

If negative, all nodes beyond a distance calculated by multiplying the total perturbation of each moving node by the absolute value of the envelope and extended away from each moving node will be fixed. If integ=7, the calculated distance defines an envelope around the moving nodes within which the morphing of those nodes will linearly taper from fully matching the nearest moving node to zero at the edge of the envelope. If any fixed nodes are within the envelope they will also reduce the morphing of nearby nodes.
undisplayed (int) –
If integ is set to 3, 6, or 7, nodes which are not displayed can be affected by the morphing. This field can be used to determine how undisplayed nodes are handled:

0 - Morph nodes on undisplayed elements

1 - Fix nodes on undisplayed elements - they will function just like nodes on the f_collection

2 - Exclude nodes on undisplayed elements - they will not be morphed nor affect the morphing

Example#

Translate and rotate a colection of nodes and stretch all the elements in the model use the exist domains#

import hm
import hm.entities as ent

model = hm.Model()

model.morphnodesmatrixdiffenvelope(
    m_collection=hm.Collection(model, ent.Node, [11, 12, 13]),
    e_collection=hm.Collection(model, ent.Element),
    f_collection=hm.Collection(model, ent.Node, [21, 22, 23]),
    matrix_array=[
        0.866,
        0.5,
        0,
        0,
        -0.5,
        0.866,
        0,
        0,
        0,
        0,
        1.0,
        0,
        1.8,
        2.6,
        3.5,
        1,
        1,
        0,
        0,
        0,
        0,
        1,
        0,
        0,
        0,
        0,
        1,
        0,
        0,
        0,
        0,
        1,
    ],
    integ=1,
    mbias=1.0,
    fbias=1.0,
    envelope=0.0,
    undisplayed=0,
)