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Siann Beck
Beauty & Braiiiiinsss!
Join date: 14 Jul 2007
Posts: 140
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10-06-2007 18:35
I'm afraid you lost me. How do I determine > for a vector value? For example, here are a couple of points I've been working with in testing:
vector vecPoint1 = <209.00,59.00,449.00>;
vector vecPoint2 = <233.0,40.0,452.0>;
As you can see, X2 > X1, but Y1 > Y2; swapping the points themselves makes no difference.
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Lee Ponzu
What Would Steve Do?
Join date: 28 Jun 2006
Posts: 1,770
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10-06-2007 19:12
The cost of rearranging the coordinates is just as large as testing between.
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Void Singer
Int vSelf = Sing(void);
Join date: 24 Sep 2005
Posts: 6,973
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10-06-2007 19:22
sorry I should have specified it's per axis... this won't actually change the cube, only how you are representing it....
though I guess this does add a layer of calculation...
//-- this doesn't work w/ negative coordinates
vector USER_P1;
vector USER_P2;
vector CUBE_SIZE = USER_P1 - USER_P2;
//-- half this to save calculations later
gCUBE_SIZE.x = llFabs( CUBE_SIZE.x );
gCUBE_SIZE.y = llFabs( CUBE_SIZE.y );
gCUBE_SIZE.z = llFabs( CUBE_SIZE.z );
vector gCUBE_CENTER = USER_P1 + USER_P2;
gCUBE_SIZE.x = CUBE_SIZE.x / 2;
gCUBE_SIZE.y = CUBE_SIZE.y / 2;
gCUBE_SIZE.z = CUBE_SIZE.z / 2;
vector gTEST_POS = //-- point to test
vector vTemp = gTEST_POS - gCUBE_CENTER;
IS_INSIDE = FALSE;
//-- if you halved it above, remove .5* here
if ( llFabs( vTemp.x ) < (.5 * gCUBE_SIZE.x){
if ( llFabs( vTemp.x ) < (.5 * gCUBE_SIZE.y){
if ( llFabs( vTemp.x ) < (.5 * gCUBE_SIZE.z){
IS_INSIDE = FALSE;
}}}
this has a benefit, in that if the user selects the center + size, you don't need to calc them....
or to use the orignal, use a temp var and swap low to origin, high to end....
I really wish there was a way to easily loop operations through vectors, or apply more than +/- across the whol thing but there isn't.... and to be honest this doesn't look like such a neat solution anymore =/
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