Adobe Director Basics

ADOBE DIRECTOR BASICS
3D: Controlling appearance
Mapping
The image below shows where the vertex points appear for the terrain mesh, and provides the index number for each
vertex point.
The faces in the mesh model are shown as triangles
[[0.00, 1.00], [0.33, 1.00], [0.67, 1.00], [1.00, 1.00],
[0.00, 0.67], [0.33, 0.67], [0.67, 0.67], [1.00, 0.67],
[0.00, 0.33], [0.33, 0.33], [0.67, 0.33], [1.00, 0.33],
[0.00, 0.00], [0.33, 0.00], [0.67, 0.00], [1.00, 0.00]]
The list above shows how each of the indexed vertex points maps to the floating point coordinates in the texture. To
make it easier to follow what is happening, the MapToTerrain.dir creates the vertex points and the texture coordinates
in an order that appears logical when printed on a page. The actual order of items in these lists is not important, so
long as both lists use the same order.
Note that neither changing the image of the texture, nor changing the texture used by the shader will have any effect
on the mapping. The same relative positions within the texture image will be used, regardless of the absolute
dimensions of the image.
Defining faces in a mesh
Each face in a mesh is defined by a list of three integers, representing the index numbers of the vertex points at each
corner. For example, the face at the top left corner can be defined as [1, 5, 2]. Note that faces are always defined in
counter-clockwise order.The faces themselves can be defined in any order. In the MapToTerrain.dir movie, for
simplicity, they are defined in the same order as the text is read. The top left face thus has a faceID of 1.
Determining which pixel is at a given uv coordinate
When used with the #detailed option, the and member3D.modelsUnderRay() functions allow you to discover the
point where a ray intersects with a given face of a give mesh of a given model. The output from these functions is in
the form of a list of property lists:
Last updated 8/26/2011
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