trimesh.viewer.trackball¶

Trackball class for 3D manipulation of viewpoints.

Classes:

Trackball(pose, size, scale[, target])

A trackball class for creating camera transforms from mouse movements.

class trimesh.viewer.trackball.Trackball(pose, size, scale, target=array([0.0, 0.0, 0.0]))¶

Bases: object

A trackball class for creating camera transforms from mouse movements.

Attributes:

`STATE_PAN`
`STATE_ROLL`
`STATE_ROTATE`
`STATE_ZOOM`
`pose`	The current camera-to-world pose.

Methods:

`down`(point)	Record an initial mouse press at a given point.
`drag`(point)	Update the tracball during a drag.
`resize`(size)	Resize the window.
`rotate`(azimuth[, axis])	Rotate the trackball about the “Up” axis by azimuth radians.
`scroll`(clicks)	Zoom using a mouse scroll wheel motion.
`set_state`(state)	Set the state of the trackball in order to change the effect of dragging motions.

down(point)¶

Record an initial mouse press at a given point.

Parameters: point ((2,) int) – The x and y pixel coordinates of the mouse press.

drag(point)¶

Update the tracball during a drag.

Parameters: point ((2,) int) – The current x and y pixel coordinates of the mouse during a drag. This will compute a movement for the trackball with the relative motion between this point and the one marked by down().

property pose¶

The current camera-to-world pose.

resize(size)¶

Resize the window.

Parameters: size ((float, float)) – The new width and height of the camera image in pixels.

rotate(azimuth, axis=None)¶

Rotate the trackball about the “Up” axis by azimuth radians.

scroll(clicks)¶

Zoom using a mouse scroll wheel motion.

Parameters: clicks (int) – The number of clicks. Positive numbers indicate forward wheel movement.

set_state(state)¶

Set the state of the trackball in order to change the effect of dragging motions.

Parameters: state (int) – One of Trackball.STATE_ROTATE, Trackball.STATE_PAN, Trackball.STATE_ROLL, and Trackball.STATE_ZOOM.