Adobe Director Basics

ADOBE DIRECTOR BASICS
3D: Controlling appearance
Click and drag to rotate a face round the opposite edge
On mouseDown, the Mesh Deform behavior in the movie uses modelsUnderLoc() to detect where you clicked. The
list returned by call contains the following data:
[[#model:model("Deformable octahedron"),
#distance: 109.1726,
#isectPosition: vector( 1.0218, 23.5829, 0.3953 ),
#isectNormal: vector( 0.5774, 0.5774, 0.5774 ),
#meshID: 1,
#faceID: 7,
#vertices: [vector( 0.0000, 25.0000, 0.0000 ),
vector( 0.0000, 0.0000, 25.0000 ),
vector( 25.0000, 0.0000, 0.0000 )],
#uvCoord: [#u: 0.0158, #V: 0.0409]]]
The information shown in bold above is used to work out which is the nearest vertex. The handlers executed during
the #mouseDown event access the data stored in the meshDeform object. They use this to create a property list
containing all the information required to rotate the vertex point around the opposite edge of its face.
Updating normals
It is not enough just to update the position of the vertex point. If the normals of each vertex are not updated, then the
face continues to react to light as if it were in its original orientation. In the Mesh Deform behavior, after moving the
vertex point, the mMoveVertex() handler calls mUpdateNormals(). This sets the normal of the dragged vertex at right
angles to the face, and sets the normals of the two other vertices of that face to the average of the normal to that face
and its neighbor.
Note: Wherever vertices are shared between faces, the normals at those vertex points are also shared. If you use the
#meshDeform modifieron models that are custom-built for the project, you may need to make sure that the model is
specifically constructed to allow the deformations that you want to apply.
Multiple texture layers
With the #meshDeform modifier, you can add extra texture layers to specific faces. See add (3D texture) and
textureLayer.
Last updated 8/26/2011
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