Modelsunderray is driven ' me craz-ay 2004-03-25 - By Allen Partridge
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Assuming that the world orientation is Z up and not y up, this should
cast a ray straight down. My first guess, given that it's terrain, is
that you are in fact in a Y up world and casting your ray out toward
camera rather than downward. Esp. given it's inclination to see other
models.
If you really only care about terrain, remove the other models from the
world before you cast the ray -- it will increase the speed
substantially if you have a lot of models in the world. Then cast your
ray and count on the result being the terrain or a total failure.
--al
-- --Original Message-- --
From: dir3d-l-bounces@(protected)
[mailto:dir3d-l-bounces@(protected)] On Behalf Of Carl Welch
Sent: Thursday, March 25, 2004 8:52 PM
To: dir3d-l@(protected)
Subject: [Dir3d-l] Modelsunderray is driven' me craz-ay
I've been trying to master terrain following for some time now. I've
looked at just about every example on the web and in books that I can
find. I just can't seem to get it to work for me.
The only model this modelunderray script CAN'T see is "terrain", the
one that I want to get isectposition.z from and put it into the
camera's transform.position.z I don't think thats to much to ask.
Terrain Following script:
targetpos = scene.model("target").getworldtransform().position
modelsList = scene.modelsunderray(vector(targetpos.X, targetpos.Y,
100), vector(0,0,-1), #detailed)
whichmodel = void
totalmodels = modelsList.count
repeat with x = 1 to totalmodels
put modelsList[x].model.name
if modelsList[x].model.name = "terrain" then
whichmodel = x
exit repeat
end if
end repeat
if whichmodel <> void then
vertb = modelsList[whichmodel].isectposition.z
else
vertb = 5
end if
scene.model("target").transform.position.z = vertb
What concept am I not grasping to make this work?
--Carl
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