Eyeon:Manual/Tool Reference/3D/Point Cloud 3D

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Point Cloud 3D [3PC]

Image:Icon_3D_PointCloud.png

Point Cloud 3D is usually a large number of locators or nulls created by 3D tracking software to represent each of the patterns it tracked while creating the 3D camera path. It is often used in 3D motion tracking to help orient other 3D elements with the tracked image. Placing all points from a 3D track into one mesh object preserves resources and interactive performance.

Point clouds are onscreen controls only. They do not appear in the rendered image.

Contents


Onscreen Context Menu

Often, one or more of the points in the cloud will have been assigned by the 3D tracker to track a certain feature. These points may also have names that distinguish them from the rest of the points in the cloud.

Hold the mouse pointer over a point and a small popup will appear with the name of the point.

Find

To find a point with a specific name, right-click and select Find from the point cloud's context menu.

Rename

Rename one or more points by selecting Rename from the context menu. Type the new name into the dialog that appears and hit enter. The point will now have that name, with a four digit number added to the end. For example, the name window will be window0000 and multiple points would be window0000, window0001, etc.

Publish

Normally, the position of a point in the cloud is unavailable. To expose the position, publish the point so that other tools can connect to the point and read its value. To publish one or more points, select the points, right-click and choose Publish from the context menu. A set of controls for that point will appear in the tool controls, allowing to connect to the point by name.

Point Cloud 3D Controls Tab

Lock XYZ

[Points Size] Deselect this checkbox to provide individual control over the size of the X, Y and Z arms of the points in the cloud.

Size XYZ

[Points Size] These sliders can be used to increase the size of the onscreen crosshairs used to represent each point.

Color

Use the standard Color control to set the color of onscreen crosshair controls.

Import Point Cloud

The Import Point Cloud button displays a dialog to import a point cloud from another application. Supported filetypes are Alias's Maya .ma files, 3ds Max ASCII Scene Export, NewTek's LightWave .lws and Softimage XSI's .xsi.


3D Transformation Tab

On Screen : Transformation Widget

Most of the controls in this tab are represented in the display view by a Transformation Widget with modes for transformation, rotation and scaling. To change the mode of the widget, select one of the three buttons in the toolbar along the side of the view, or press the `q' key for translation mode, `w' for rotation and `e' for scaling. In all three modes, individual axes of the control may be dragged to affect just that axis, or the center of the control may be dragged to affect all three axes. Note: In order to scale in a single dimension, the Lock X/Y/Z Scale checkbox must be unchecked.

X, Y, Z Offset

These controls can be used to position the 3D element.

Rotation Order

Use these buttons to select which order is used to apply the Rotation along each axis of the object. For example, XYZ would apply the rotation to the X axis first, followed by the Y axis and then followed by the Z axis.

X, Y, Z Rotation

Use these control to rotate the object around its pivot point. If the Use Target checkbox is selected then the rotation is relative to the position of the target, otherwise the global axis is used.

X, Y, Z Pivot

A Pivot point is the point around which an object rotates. Normally, an object will rotate around its own center, which is considered to be a pivot of 0,0,0. These controls can be used to offset the pivot from the center.

X, Y, Z Scale

If the Lock X/Y/Z checkbox is checked, a single Scale slider will be shown. This adjusts the overall size of the object. If the Lock checkbox is unchecked, individual X, Y and Z sliders will be displayed to allow scaling in any dimension. Note: If the Lock checkbox is checked, scaling of individual dimensions is not possible, even when dragging specific axes of the Transformation Widget in scale mode.

Use Target

Selecting the Use Target checkbox enables a set of controls for positioning an XYZ target. When target is enabled, the object will always rotate to face the target. The rotation of the object becomes relative to the target.




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Tips for Point Cloud 3D (edit)

EyeonTips:Manual/Tool Reference/3D/Point Cloud 3D