quick3D - FAST 3D File Viewing and Converting
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Table of Contents
i. Preface
ii. Introduction
1. Loading and Saving Files
2. Controlling the 3D Display
3. Customizing the 3D Display
4. Scene Functions
5. Object Functions
6. Options

A. Supported File Types
B. Command Line Reference
C. quick3D Object and Scene File Format Specification

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2. Controlling the 3D Display
2.1 - Mouse Control

There are two modes for manipulating 3D files in quick3D that affect how the mouse behaves. The first is Rotate Mode, also the default, in which the mouse controls the model's orientation. The other is Fly Mode, in which the mouse controls your eye orientation. To toggle between the two modes, select Mouse Mode from the Options menu and choose the desired mode. An easier method is to use the "Fly" toolbar button (see Figure 2.1), which toggles fly mode on and off.

Figure 2.1
Fly toolbar button

When you are in rotate mode, dragging the mouse with the left button down will "grab" the model and rotate it in the direction you are moving the mouse. Dragging the mouse with the right button down will zoom in and out on the model's pivot point (see Section 2.2 of this chapter). For some extremely large or small models, the rotation may be too sensitive when zoomed up close on a model, or not sensitive enough when zoomed far out. To compensate for this, turn on Zoom Dependent Rotation Speed from the Options menu. This will automatically adjust the rotation sensitivity based on how far in/out you are zoomed. In fly mode, dragging the mouse with the left button depressed will move your eye point around, or in other words, change what you are looking at. Think of this like your typical Quake-like first person 3D game. Dragging the mouse with the right button down in fly mode will move the eye position forward and backward in the direction you are looking.

2.2 - Changing The Pivot Point

By default the model will rotate about its center (the place that quick3D has decided is the middle of the object). If you would rather rotate about the model's actual origin, or the model's center of geometry, you can change the pivot point from the Pivot Point sub-menu under the Options menu.

2.3 - Spin (Hands-Free Rotation)

When in the rotate mouse mode, quick3D can rotate the model by itself so you can sit back and watch it spin on an axis. To do this, inertial rotation must first be turned on, which can be done by selecting Spin (Hands-Free Rotation) from the Options menu, or by clicking the spin toolbar button (see Figure 2.2), which toggles this automatic rotation on and off.

Figure 2.2
Spin toolbar button

To initiate the automatic rotation, start rotating the model with the left mouse button, and then let go of the button. The model will continue to rotate by itself in the direction you dragged it. The speed will depend on how fast you moved the mouse. To make it stop rotating, deselect Spin from the menu or toolbar. A single click in quick3D's display window will also stop the rotation.

2.4 - Resetting The View

If you would like to reset the view back to the way it was when you initially loaded the file (if you get lost in the scene), then you can select Reset View from the Scene menu. There is also a way to record several past views for back-tracking. These are called snapshots, which are covered in Chapter 3.1.

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