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HM-3550: Morph Volume

HM-3550: Morph Volume

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HM-3550: Morph Volume

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Model Files

This exercise uses the body_side.hm file, which can be found in the hm.zip file. Copy the file(s) from this directory to your working directory.

 

Exercise: Changing the Shape of the B-pillar with the Help of Morph Volume

This exercise shows how to smoothly change the shape of a B-pillar via morph volumes.

tut_IMG00437

B-Pillar before and after morphing

Step 1: Load and review the model.

1.Start HyperMesh Desktop.
2.To open a model file, click File > Open > Model from the menu bar, or click hm-open-model-icon on the Standard toolbar.
3.In the Open Model dialog, open the body_side.hm file. A model appears in the graphics area.

Step 2: Create morph volumes.

1.To open the Morph Volumes panel, click Morphing > Create > Morph Volumes from the menu bar.
2.Set the creation method to pick on screen.

hm-3550-1

3.Set handle placement to corners only.
4.Select the auto-tangent check box.
5.On the Standard Views toolbar, click xz_right_plane_view.
6.Click the four red circles indicated in the image below to draw a window. HyperMesh creates a morph volume, which encloses the area.

tut_img00438

Points for creating the morph volume

Step 3: Split the morph volumes.

1.Go to the split/combine subpanel.
2.Set the by nodes/by edge toggle to by edges
3.Select an edge of the morph volume close to location 1 as indicated in the following image. A green colored cross moves to the location of the black dot.

tut_img00439

Locations to split the morph volume

4.Click split. HyperMesh splits the morph volume into two.
5.Repeat steps 3.3 and 3.4, except select an edge of the morph volume close to location 2 as indicated in the previous image.

Step 4: Change the profile of the b-pillar.

Method 1: Fixed value based

1.To open the Morph panel, click Morphing > Morph from the menu bar.
2.Go to the move handles subpanel.
3.Set the morphing method to translate.

hm-3550-2

4.Set the orientation selector to along xyz.
5.In the y val= field, enter 100.
6.Leave the x val= and z val= fields set to 0.
7.Press and hold SHIFT, then drag your mouse around the the eight handles indicated in the image below.

tut_img00440

Select handles for morphing

8.Click morph.
9.To verify that the b-pillar is morphed, rotate the model.

hm-3550-3

10.To restore the model's original shape, click undo.

 

Method 2: Interactive graphic manipulator base

11.In the move nodes subpanel, set the morphing method to interactive and manipulators.

hm-3550-4

12.Leave the other parameters and options set to their default values.
13.On the Standard Views toolbar, click xz_right_plane_view.
14.Press and hold SHIFT, then drag your mouse around the the eight handles indicated in the image below. A manipulator appears.

tut_img00440

15.Optional: You can select another node as the origin to set the manipulator in a different position.

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16.Zoom in and rotate close to the manipulator area.

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17.To translate the nodes, click and drag, graphically, one of the three yellow arrows of the manipulator.  

hm-3550-7            

18.Click undo.
19.To rotate the nodes about the center of the manipulator, click and drag, graphically, one of the three yellow arcs of the manipulator.

hm-3550-8

20.Click undo.
21.To move the nodes in a plane, click and drag, graphically, one of the three yellow right angles of the manipulator.

hm-3550-9

22.Click undo.
23.To create more than one manipulator at a time, set the single manipulator/multiple toggle to multiple.

hm-3550-10

24.To create a new manipulator, click new manip and then graphically select one or more moving nodes.
Note:The different manipulators may have different selected entities and different parameters, and can be moved independently of one another.
25.To move a manipulator, click a manipulator or simply move your mouse over a manipulator. HyperMesh updates the panel to the parameters associated to that manipulator. You can change the parameters or the entities associated with them if you desire.
26.To make manipulators active or inactive, switch the manip:active/manip:inactive toggle. When active, the manipulators morph the model when you move them. When inactive, the manipulators will only change their own position and orientation when you move them.

hm-3550-11

 

Summary

In both methods, you morphed the b-pillar in a smooth fashion with minimum distortion to the elements.

 

 

See Also:

HyperMesh Tutorials