Modeling with polygons deel2
Contents
Creating objects using faces
Create polygon tool
With the Create Polygon Tool it's possible to create faces in any shape by clicking the corners of the desired face. You can find this tool in the polygons menuset under Mesh > Create Polygon Tool:
Your pointer will turn into a cross and you can now start clicking the corners of the desired face. When not using snap options the points will be placed flat in the view port you're working in. If you're working in the perspective view the points will be placed flat in the y-direction. If the face is finished you press [enter] on your keyboard to close it.
If you want to create a hole in the face, you finish the shape, and before closing it with enter press control on your keyboard while clicking the first point of the shape of the hole. After that you can proceed to click the next points of the hole (without pressing control). You can start another hole by pressing control again while clicking the first point of the new hole. When your shape is finished (with or without holes) press enter to close it.
After you have closed the face you can adjust it in component mode like all other polygon geometry.
For a more elaborate explanation of the create polygon tool we refer to the Modeling an orthogonal pavilion tutorial.
Normals
In Maya each surface has a front and a back side. This has consequences for how the face responds to certain commands. Which side is the front and back can be shown by the normals. You can display the normals of a face by selecting the face, then going to Display > Polygons > Face Normals:
On one side you'll see a line perpendicular to the face. This side is the front. If you would extrude this face the arrow will point in that direction too. If you want to change front and back, select the face and go to Mesh Display > Reverse:
The faces of a volume also have normals. The normals of primitives automatically are turned outwards.
To hide the normals, select the object and go to Display > Polygons > Face Normals again.
Extrude
If you have a face and want to make it into a volume you can use the extrude command. First select the face you want to extrude and then go to Edit Mesh > Extrude:
Then the Manipulator Tool appears on the face. You can now pull the arrow of the direction you want to extrude the face in to make the face into a volume. You can also numerically put in the value of the extrude in the channelbox
Split polygontool
If you want to split a face into more faces you can use the split polygon tool. With this tool extra vertices and edges are added. The exact name and location of this tool depend on the Maya version:
- Maya 2011 and before
- Maya 2012-2014
- Maya 2015-2016
Click on the option box next to it. This will make the settings of the Split Polygon tool appear at the spot of your channel box:
Multi-Cut Tool (Maya 2015 and later):
Make sure the Multi-Cut Tool is selected in the Mesh Editing Tools section of the Modeling Toolkit window and use the Snap Step % setting to specify at what percentage increment to snap on an edge. Use Shift to enable snap mode.
Interactive Split Tool (before Maya 2015):
The divisions shown in the settings are the number of divisions the new inserted edge will have. With the smoothing angle you can control how hard or soft the edges of your split geometry will be; use a low value (0) to let the edges appear hard. It can be really convenient to use snapping points along the edges. The number of points is the number of points per edge your mouse will snap to. These points are evenly divided along the edge. The snapping tolerance will determines how close the vertex needs to be to the snapping point before it snaps to it.
Now you can click and drag your mouse along an edge of the face you want to split:
Now you can adjust the object further by going into component mode and moving the vertices or edges.
Merge vertices
It is possible to merge multiple vertices into one. Select the vertices you want to merge in component mode, then go to the option box next to edit mesh > merge vertices. The settings of the merge vertices command will be shown:
The threshold is the amount of units within which the selected vertices should be for Maya to merge them and is automatically set to 0,0100. If the vertices you want to merge are further apart, put in a number that is bigger than the amount of units the vertices are apart from each other, after that press merge: