Adobe Director Basics

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ADOBE DIRECTOR BASICS 3D: Controlling action When the avatar moves away, the camera can stay in the same position until there is enough space between it and the avatar for it to start following the avatar again. To experiment with this download the movie FollowCamera.dir and launch it. Rotate the camera to see how it moves closer to the avatar if there is a wall behind it Placing a script instance on a node's userData list The code that determines the position of the camera relative to the avatar is contained in the Third-Person Camera script. An instance of the script is added to the camera's userData list, so that any script that has access to the camera object itself can call the Third-Person Camera instance. Required information The Third-Person Camera script requires the following information: The 3D member (or the sprite which contains the 3D member). This information is required in order to send modelsUnderRay() calls to detect barriers. A list of models used for collision detection. The radius of the imaginary collision cylinder around the avatar model. The maximum distance that the camera can lag behind the avatar. The camera to use to follow the avatar, if a 3D member or sprite has several cameras The node that the camera is to follow is assumed to be the camera's parent. Action Each time the avatar model moves, the Follow_Update() handler in the Third-Person Camera script performs these actions: Send a ray backwards from the avatar's current position. Determine the distance along this ray to the nearest barrier model. Add the radius of the imaginary collision cylinder to this distance, to get the distance to the solid object behind the barrier. Decrease this distance, if necessary, to the maximum distance between the avatar and the camera. Move the camera the appropriate distance along the same line as the ray. Last updated 8/26/2011 231
ADOBE DIRECTOR BASICS 3D: Controlling action The camera is now behind the camera at the optimal distance, and will not collide with any walls. Sample code Here's a simplified version of the Third-Person Camera script: -- pointer to the 3D member property p3DMember -- pointer to the camera object that is -- controlled by this instance. This -- instance is added to pCamera.userData property pCamera -- radius of cylinder around the parent -- node = minimum distance of pCamera from -- parent property pRadius -- maximum distance of pCamera from parent property pMaxDistance -- [#maxNumberOfModels: 1, -- #levelOfDetail: #detailed -- #modelList: ] property pRayInfo -- pointer to the parent of pCamera = the -- node that pCamera will follow property pParent -- initial transform of pCamera, -- representing its vertical position at -- the center of the cylinder surrounding -- the parent node. property pTransform on new(me, a3DMember, aRadius, aMaxDistance, aBarrierList) p3Dmember = a3DMember pRadius = aRadius pMaxDistance = aMaxDistance pRayInfo = [:] pRayInfo[#maxNumberOfModels] = 1 pRayInfo[#levelOfDetail] = #detailed pRayInfo[#modelList] = aBarrierList pCamera = p3DMember.camera(1) pParent = pCamera.parent pTransform = pCamera.transform.duplicate() (pCamera.userData)[#followCamera] = me end new Last updated 8/26/2011 232
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ADOBE ® DIRECTOR ® BASICS
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Contents Preface Credits . . . . .
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Chapter 1: 3D basics Adobe® Direct
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Chapter 4: Audio mixers and sound o
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ADOBE DIRECTOR BASICS Audio mixers
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Adobe Director Basics

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