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vector problem
#253479
02/24/09 22:28
02/24/09 22:28
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Joined: Nov 2008
Posts: 354
saeculum II
MPQ
OP
Senior Member
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OP
Senior Member
Joined: Nov 2008
Posts: 354
saeculum II
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Hi,
I have the following problem:
what is the difference between:
vec_set (vector1.x, vector (1,2,3));
and
vec_set (vector1.y, vector (1,2,3));
is it not enough to use the first one if i want to include the whole "vector (1,2,3)" into "vector1"? But there is a different result when i use the second example? what is this difference?
new project in early stage...
Intel Xeon X3450 2,66GHz | Mushkin 8 Gib | Zotac GTS250 + 7300LE | A8.3 com
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Re: vector problem
[Re: MPQ]
#253482
02/24/09 23:14
02/24/09 23:14
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Joined: Jul 2008
Posts: 170
Germany, near Mainz
Nicotin
Member
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Member
Joined: Jul 2008
Posts: 170
Germany, near Mainz
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The difference is that
vec_set (vector1.y, vector (1,2,3));
is wrong.
vec_set (vector1.x, vector (1,2,3));
does:
vector1.x = 1;
vector1.y = 2;
vector1.z = 3;
You ever have to use the first value. Same for pan:
vec_set (entity.pan, vector (1,2,3));
and not
vec_set (entity.roll, vector (1,2,3));
If you use the vector1.y then you get another value because the engine makes really odd things with this^^
Last edited by Nicotin; 02/24/09 23:16.
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Re: vector problem
[Re: Nicotin]
#253536
02/25/09 11:10
02/25/09 11:10
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Joined: Nov 2008
Posts: 354
saeculum II
MPQ
OP
Senior Member
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OP
Senior Member
Joined: Nov 2008
Posts: 354
saeculum II
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yes i already noticed that^^
new project in early stage...
Intel Xeon X3450 2,66GHz | Mushkin 8 Gib | Zotac GTS250 + 7300LE | A8.3 com
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Re: vector problem
[Re: MPQ]
#253820
02/27/09 04:33
02/27/09 04:33
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Joined: Feb 2008
Posts: 3,232
Australia
EvilSOB
Expert
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Expert
Joined: Feb 2008
Posts: 3,232
Australia
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Crudely put... and not NECESSARY to know. vec_set(vector1.x, vector (1,2,3));
+---+---+---+----------------+
vector()| X | Y | Z | temp space << somewhere in memory
| | |
vec_set | | |
v v v
vector1 | X | Y | Z | other variable | << somewhere else in memory
Becomes
vector()| 1 | 2 | 3 | temp space << somewhere in memory
| | |
vec_set | | |
v v v
vector1 | 1 | 2 | 3 | other variable | << somewhere else in memory
All good.
BUT when
vec_set (vector1.y, vector (1,2,3));
+---+---+---+----------------+
vector() | X | Y | Z | temp space << somewhere in memory
| | |
vec_set | | |
v v v
vector1 | X | Y | Z | other variable | << somewhere else in memory
becomes
vector() | 1 | 2 | 3 | temp space << somewhere in memory
| | |
vec_set | | |
v v v
vector1 | ? | 1 | 2 | ??? other variable | << somewhere else in memory
vector1.x remains unchanged, but the "other variable" gets damaged.Hope this helps.
"There is no fate but what WE make." - CEO Cyberdyne Systems Corp.
A8.30.5 Commercial
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