I believe the dist[0] array parameter of your Intersect.segmentAndQuad
method is the collection of all the Z values that correspond to the screen X
,Y point
that you picked.
> ----------
> From: Casteel, Don[SMTP:[EMAIL PROTECTED]]
> Reply To: Discussion list for Java 3D API
> Sent: Thursday, May 11, 2000 8:33 AM
> To: [EMAIL PROTECTED]
> Subject: [JAVA3D] Intersect() ??
>
> I'm trying to use Intersect & PickSegment as a collision detector. I'm
> creating a PickSegment from the moving object's curent position to a point
> in the direction of travel. I'm then passing it and a quad into
> intersect.segmentAndQuad(...).
> Everything is compiling and running without errors. I know I the pick
> segment is intersecting the quad. But I'm not getting a true return value?
> The one thing I don't understand about the Intersect.segmentAndQuad method
> is the dist[0] array parameter. I've set it up as double[] dist = {1.0};
> but
> that's just a guess. Why is this an array, and what does it represent?
> Acording to the docs, I have to know the point of intersection. If I knew
> the point of intersection, I wouldn't need to do any of this, see below:
> segmentAndQuad
> [snip]
> Parameters:
> segment - The segment to use in the intersection test.
> coordinates - An array holding the quadrilateral data.
> index - An array index that designates the starting position in
> the
> array of the quadrilateral to test.
> dist[0] - The distance between the start of the segment and the
> point of intersection, if it exists. The dist array should be allocated by
> the user.
> Returns:
> true if the segment intersects the quad, false if the segment does
> not intersect the object.
>
>
> Don Casteel
>
> Manufacturing Engineer
> TEXTRON Automotive Company -- Athens Operations
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