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Does anyone have any suggestions as to how I would go about detecting a
collision between an edge of a triangle and an object? vertex collision is
easy but the edge detection completly confuses me, I've had some ideas but
none of them are very practical, and they don't give me the point of
intersection.
--
Kevin
http://www.geocities.com/qsquared_1999/
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In article <3c81302d@news.povray.org>, "Kevin Loney" <klo### [at] pt2m com>
wrote:
> Does anyone have any suggestions as to how I would go about detecting a
> collision between an edge of a triangle and an object? vertex collision is
> easy but the edge detection completly confuses me, I've had some ideas but
> none of them are very practical, and they don't give me the point of
> intersection.
Use trace() along the edge of the triangle, if the distance to the
intersection is less than the length of the edge, the edge collides with
the object.
--
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/
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I've considered that method which is by far the easiest but it won't work
very well for a cloth because I need to find the exact point of collision so
I can calculate accurate bounce.
--
Kevin
http://www.geocities.com/qsquared_1999/
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In article <3c813859$1@news.povray.org>,
"Kevin Loney" <klo### [at] pt2mcom> wrote:
> I've considered that method which is by far the easiest but it won't work
> very well for a cloth because I need to find the exact point of collision so
> I can calculate accurate bounce.
If you mean to find the point the side first hit the object, there is no
way to do that exactly. You would have to use infinitely many steps.
However, you could do the tracing from both ends of the side, and pick a
point in the middle of the two intersections for a slightly more
accurate approximation. Or take the last position of the edge and the
current position, and perform several samples to get a better result. I
think the best solution is just a higher resolution cloth and smaller
step values though.
--
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/
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