Vector creation command

[gc8 970]

Hi

I'm looking for a command that creates a vector but I can't seem to find it from the wiki. I have been using my old vector creation function that looks like this: [_angle, _dist] call getVector; But I would like to replace that with engine command for speed. Anyone know such command?

 

thx!

[pierremgi 4738]

speed in km/h is similar to : 3.6 * (velocityModelSpace _obj select 1)

If you need a 3D vector for _obj:

velocityModelSpace _obj  // [x,y,z] referring to the object, so X and Z near to 0 for a land vehicle.

You can:

velocityModelSpace _obj vectorMultiply 3.6 for results in km/h

 

 

[gc8 970]

5 minutes ago, pierremgi said:

speed in km/h is similar to : 3.6 * (velocityModelSpace _obj select 1)

If you need a 3D vector for _obj:

velocityModelSpace _obj  // [x,y,z] referring to the object, so X and Z near to 0 for a land vehicle.

You can:

velocityModelSpace _obj vectorMultiply 3.6 for results in km/h

 

 

 

But these commands require object? I want to create vector without object... (just with angle & distance)

[pierremgi 4738]

So, not really a speed of something. Any vector has a coordinate system.
In 2D:

angle (direction from North) and distance is just  [distance * sin direction, distance * cos direction,0]  // so [x,y,0]

 

You understand that in 3D, there is a lack of info (direction angle, distance, elevation angle)

[gc8 970]

4 minutes ago, pierremgi said:

So, not really a speed of something.

 

lol no sorry little confusion there , I meant fast command execution

 

4 minutes ago, pierremgi said:

angle (direction from North) and distance is just  [distance * sin direction, distance * cos direction,0]  // so [x,y,0]

 

yep this is what my function does... no engine version for that?

[pierremgi 4738]

14 minutes ago, gc8 said:

 

lol no sorry little confusion there , I meant fast command execution

 

 

yep this is what my function does... no engine version for that?

No, it's basic... and useless most of the time. Arma is more oriented object and 3D.

 

[gc8 970]

14 minutes ago, pierremgi said:

No, it's basic... and useless most of the time. Arma is more oriented object and 3D.

 

 

you have a point there. Guess I could use #define for "inline" solution

[NumbNutsJunior 61]

9 hours ago, pierremgi said:

angle (direction from North) and distance is just  [distance * sin direction, distance * cos direction,0]  // so [x,y,0]

 

9 hours ago, gc8 said:

yep this is what my function does... no engine version for that?

No engine command would be faster anyways... r*cos(theta) and r*sin(theta) are the most simple calculations you can make.

[gc8 970]

7 hours ago, NumbNutsJunior said:

No engine command would be faster anyways... r*cos(theta) and r*sin(theta) are the most simple calculations you can make.

 

I suppose the difference isn't that big but it depends on how many times the code is needed/executed

 

Did some tests (my fn vs no call code):

 

Result:
0.0014 ms

Cycles:
10000/10000

Code:
_length = 100; _angle = 90; [sin _angle * _length,cos _angle * _length]

Result:
0.0041 ms

Cycles:
10000/10000

Code:
[90, 100] call getVector

 

 

 

 

Code of my getVector:

 

private["_angle","_length","_x","_y","_vec"];

_angle = _this select 0;
_length = _this select 1;

_x = sin _angle * _length;
_y = cos _angle * _length;

_vec = [_x,_y];

_vec