Hello~
I am trying to learn about the map format in order to convert between other
formats. I was hoping someone could help me figure out how planes are
supposed to be defined to create valid shapes. I've read both the quake
(.map), and the source (.vmf) documentation (
https://developer.valvesoftware.com/wiki/VMF_documentation#Solid), but I
can't fully make sense of it.
I looked at the VMF for a minimal primitive in hammer (3 sided pyramid),
and I thought the plane contents made sense:
side1: "plane" "(64 -64 0) (0 64 0) (-64 -64 0)"
side2: "plane" "(0 64 0) (64 -64 0) (0 0 128)"
side3: "plane" "(64 -64 0) (-64 -64 0) (0 0 128)"
side4: "plane" "(-64 -64 0) (0 64 0) (0 0 128)"
Now I tried to emulate this with different numbers/shape, but it is
apparently now an invalid object and I've no idea why:
side1: "plane" "(-32 -32 0) (-32 32 0) (32 32 0)"
side2: "plane" "(32 32 0) (-32 -32 0) (0 0 64)"
side3: "plane" "(-32 -32 0) (-32 32 0) (0 0 64)"
side4: "plane" "(-32 32 0) (32 32 0) (0 0 64)"
Here's an image illustrating my confusion/efforts:
http://i.imgur.com/jot8r.jpg
I hope someone can help me figure out why this is an invalid object!
My current understanding is somewhat like this: Imagining a house of cards
(playing cards) where 3 cards are stacked to form a triangle; the points
where the cards meet will be the vertices (of course there is a gap on
either side at this point so this can't be a valid brush), so imagining 6
cards all stacked in parallel of their sides forming a cube'ish shape, all
vertices can be accounted for, so it's valid.. and imagining the cards
could pass through each other, vertices for non-parallel shapes such as
pyrimids can be determined.
Is my understanding correct (I hope I explained it well enough)? One other
thing that confuses me is that there are only 3 points defined. So far in
my understanding I assume that the fourth is automatically accounted for (I
can't think how else it could work, besides all planes being triangle
shaped, but I know that can't be the case).
I hope someone has some advice that can help me figure this out! Also, some
suggested reading might be nice to know, because the concept of a plane is
new to me, and googling 3d planes gives me way too many damn aeroplane
results lol!
Thanks~
Bye~
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