Zooming, Rotation, and Panning
MvMf6 displays an object as viewed from a particular viewpoint. Zooming, rotation, and panning are different ways to interact with the object by changing the viewpoint.
Zooming in moves the viewpoint closer to the object being viewed, causing the object to appear bigger.
Zooming out moves the viewpoint away from the object being viewed, causing the object to appear smaller.
Rotation moves the viewpoint in an angular direction so that the viewed object appears to rotate.
Panning moves the viewpoint laterally so that the viewed object appears to move sideways.
Zooming, rotation, and panning are performed by mouse buttons. Two types of mouse interactions are provided:
Trackball-mode interaction is the default. However, the user may change the interaction mode from one to the other.
Trackball-Mode Interaction
First, put the cursor inside the display area. Then:
To zoom in, press and hold the right mouse button, and drag the cursor upward.
To zoom out, press and hold the right mouse button, and drag the cursor downward.
To rotate, press and hold the left mouse button, and drag the cursor in the direction of rotation.
To rotate around an axis perpendicular to the screen, hold down the Ctrl key, press and hold the left mouse button, and drag the cursor in the direction of rotation.
To pan, hold down the Shift key, press and hold the left mouse button, and drag the cursor in the direction of panning.
Joystick-Mode Interaction
In joystick-mode interaction, the speed and direction of zooming, rotation, and panning are determined by the position of the cursor relative to the center of the display area.
When the cursor is far from the center, interaction is faster.
When the cursor is near the center of the display area, interaction is slower.
To zoom in, place the cursor on the upper half of the display area, then press and hold the right mouse button. To end zooming, release the button.
To zoom out, place the cursor on the lower half of the display area, then press and hold the right mouse button. To end zooming, release the button.
To rotate, place the cursor such that its position relative to the display area center indicates the direction of rotation, then press and hold the left mouse button. To end rotation, release the button.
To rotate around an axis perpendicular to the screen, place the cursor such that its position relative to the display area center indicates the direction of rotation, then press and hold the Ctrl key and left mouse button. To end rotation, release the button.
To pan, place the cursor such that its position relative to the display area center indicates the direction of panning, hold down the Shift key, then press and hold the left mouse button. To end panning, release the button.
Changing Interaction Mode
Click the File menu and select Preferences.
Select the type of mouse interaction, either Trackball-Mode or Joystick-Mode.
Click OK.