Learn how to use the TargetCamera3D with the standard Away3D Lite application templates.
Away3D Lite includes 2 additional cameras other than the standard Camera3D object that is created by the template. In this tutorial we will look at the TargetCamera3D.
ApplicationManager.as
First we need something to look at. Here we load the Max3DS parser, set it to scale the loaded model by 5, parse it and extract the Mesh object from the returned ObjectCollection3D. [code]
The model is then textured with a new BitmapMaterial that has had it smooth property set to true to blend the material. [code]
The mesh is then rotated so it is standing upright. [code]
Finally the mesh is added to the scene so it is visible. [code]
Away3D Lite cameras can be swapped at runtime. The first thing we need to do is create a new TargetCamera3D. We supply the focus and zoom as 10 and 100 (the defaults), and set the target of the camera to be the mesh that we just loaded. [code]
The camera is then positioned down the z axis so it can view the mesh, which is at the origin. [code]
The default templates shipped with Away3D Lite create the standard Camera3D object. To replace this default camera with our own target camera we just assign it to the views camera property. [code]
In the onPreRender function we rotate the mesh around slowly, and modify the zoom of the camera to match the slider that was added to the Flex Application GUI. [code]
A3DL_TargetCamera.mxml
We have made three changes to the MXML file from the last tutorial. The first is that the maximum framerate has been increased to 100. This lets Away3D Lite really show off its speed. [code]
Secondly we have added the Away3D Lite template using the addChildAt function, supplying 0 as the index. This ensures that the Flex GUI controls appear on top of the Away3D display. [code]
The last change is the addition of a vertical slider, which allows the user to modify the zoom of the target camera. [code]
The Away3D Lite target camera provides a simple way to keep the view on a specific object, without having to manually update the position of the camera when the position of the target object moves.
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