Autodesk 663B1-05A111-1001 User Guide - Page 232

Preview more than one object at the same time, Notes about orthographic cameras and level of detail

Page 232 highlights

12 | Basics Menus Reference > Edit > Level of Detail • In the Hypergraph, use the middle mouse button to drag the new object onto the lodGroup node. • In the Outliner, use the middle mouse button to drag the new object onto the group. The new object is added to the bottom of the lodGroup's hierarchy. Tip You can also re-order a group by selecting Edit > Level of Detail > Ungroup. Re-order the objects and create a new group. Preview more than one object at the same time You can preview different objects at the same time to compare them. To view more than one object 1 In the Hypergraph, select the level of detail group node. The node's attributes are displayed in the Channel Box. Each Display Level has three possible settings: uselod, show, and hide. 2 Use the left mouse button to click one of the Display Level's uselod text. A drop-down menu with the three options is displayed. 3 Select one of the options. You can show or hide any combination of objects. Tip Reset the Display Levels to uselod to return to the regular level of detail behavior. Notes about orthographic cameras and level of detail Level of Detail displays one child of a level of detail group, depending on the group's distance to a camera. For perspective cameras, this means measuring the distance between the camera position to the center of the bounding box of the group. For orthographic cameras, the distance is measured differently. This is because zooming, panning, and dollying in an orthographic view does not change the camera position, but instead changes the camera's orthographic width. So the distance is measured as: distance = (default camera distance) * (camera's orthographic width)/(default orthographic width) Substituting Maya's default values in this equation results in the following: distance = 3.333 * (camera's orthographic width) Basics 232

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Basics
232
12 | Basics Menus
Reference > Edit > Level of Detail
In the Hypergraph, use the middle mouse button to drag the new object
onto the
lodGroup
node.
In the Outliner, use the middle mouse button to drag the new object onto
the group.
The new object is added to the bottom of the
lodGroup
’s hierarchy.
Preview more than one object at the same time
You can preview different objects at the same time to compare them.
To view more than one object
1
In the Hypergraph, select the level of detail group node.
The node’s attributes are displayed in the Channel Box. Each Display Level
has three possible settings: uselod, show, and hide.
2
Use the left mouse button to click one of the Display Level’s uselod text. A
drop-down menu with the three options is displayed.
3
Select one of the options. You can show or hide any combination of objects.
Notes about orthographic cameras and level of detail
Level of Detail displays one child of a level of detail group, depending on the
group’s distance to a camera. For perspective cameras, this means measuring
the distance between the camera position to the center of the bounding box of
the group.
For orthographic cameras, the distance is measured differently. This is because
zooming, panning, and dollying in an orthographic view does
not
change the
camera position, but instead changes the camera’s
orthographic width
. So the
distance is measured as:
distance = (default camera distance) * (camera’s orthographic
width)/(default orthographic width)
Substituting Maya’s default values in this equation results in the following:
distance = 3.333 * (camera’s orthographic width)
Tip
You can also re-order a group by selecting Edit > Level of Detail >
Ungroup. Re-order the objects and create a new group.
Tip
Reset the Display Levels to uselod to return to the regular level of
detail behavior.