Chapters

TOC Getting Started Geometry Lighting Textures Behaviours Navigation Audio Input Devices No Monitors

Contents

Chapter TOC Mouse Handling Picking Collisions Summary

User Feedback

One theme that you will see repeated throughout this tutorial is that an effective 3D application needs to have good, simple user feedback. This feedback may take more than one form, whether it be 3D callouts, object dragging or collisions between virtual objects. The previous chapter alluded to the integral part the behaviours play when implementing user input.

All of the code that you have seen to date is relatively boring from a user’s perspective: start the application and look at the output. There is no chance to get in and play with what is being presented. In this chapter we add the capability of using the mouse to interact with the world. When interacting with the world this implies feedback about what the user is doing, so we shall also include other feedback issues like collision detection.

Chapter Contents

• Mouse Handling
• Picking
• Collisions
• Summary