velocityModelSpace: Difference between revisions
Jump to navigation
Jump to search
Lou Montana (talk | contribs) m (Text replacement - "\|x([0-9])= *<code>([^<]*)<\/code>" to "|x$1= <sqf>$2</sqf>") |
Lou Montana (talk | contribs) (Add m/s info) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 6: | Line 6: | ||
|gr1= Object Manipulation | |gr1= Object Manipulation | ||
|descr= Returns the velocity (speed vector) of the vehicle as an array with format [x, y, z]. Vector is in model space. | |descr= Returns the velocity (speed vector) of the vehicle as an array with format [x, y, z] in metre per second. Vector is in model space. | ||
|s1= [[velocityModelSpace]] vehicle | |s1= [[velocityModelSpace]] vehicle | ||
| Line 14: | Line 14: | ||
|r1= [[Array]] | |r1= [[Array]] | ||
|x1= <sqf>velocityModelSpace _chopper; | |x1= <sqf>velocityModelSpace _chopper; // returns [X (left(-) right(+)), Y (backward(-) forward(+)), Z (down(-) up(+))]</sqf> | ||
|seealso= [[setVelocityModelSpace]] [[velocity]] [[speed]] [[setVelocity]] [[setVelocityTransformation]] | |seealso= [[setVelocityModelSpace]] [[velocity]] [[speed]] [[setVelocity]] [[setVelocityTransformation]] | ||
}} | }} | ||
{{Note | |||
|user= Pierre MGI | |||
|timestamp= 20141211025500 | |||
|text= This function is useful for helicopters as it returns Z vector like an indicator of thrust/load ratio. More or less climb (+) or descent (-) tendency but: | |||
As X,Y,Z vectors are relative to vehicle attitude, this function doesn't return a climb or descend rate (as the attitude of the vehicle can be far from horizontal). | |||
You can get negative Z vector, in jets, while climbing fast, peeling off in the sky! | |||
This function is useful for helicopters as it returns Z vector like an indicator of thrust/load ratio. More or less climb (+) or descent (-) tendency but: | |||
As X,Y,Z vectors are relative to vehicle attitude, this function doesn't return a climb or descend rate (as the attitude of the vehicle can be far from horizontal). You can get negative Z vector, in jets, while climbing fast, peeling off in the sky! | |||
More or less, you can use as a Z accelerometer factor but invert the sign: +G acceleration (negative vector below the jet) is -Z here. | More or less, you can use as a Z accelerometer factor but invert the sign: +G acceleration (negative vector below the jet) is -Z here. | ||
If not "physically" correct, the behavior is sufficient enough for | If not "physically" correct, the behavior is sufficient enough for {{arma}} flight model. | ||
}} | |||
{{Note | |||
|user= K.J. | |||
|timestamp= 20150621023600 | |||
|text= Previous note is physically incorrect. Velocity can not be used to give information about Thrust/Load ratio or G-Forces/acceleration. | |||
Previous note is physically incorrect. Velocity can not be used to give information about Thrust/Load ratio or G-Forces/acceleration. To get acceleration you have to create the derivative of velocity after time dv/dt -> the difference of velocity between 2 timesteps divided by the time that passed between the 2 steps. | To get acceleration you have to create the derivative of velocity after time dv/dt -> the difference of velocity between 2 timesteps divided by the time that passed between the 2 steps. | ||
}} | |||
Latest revision as of 17:55, 18 September 2023
Description
- Description:
- Returns the velocity (speed vector) of the vehicle as an array with format [x, y, z] in metre per second. Vector is in model space.
- Groups:
- Object Manipulation
Syntax
- Syntax:
- velocityModelSpace vehicle
- Parameters:
- vehicle: Object
- Return Value:
- Array
Examples
- Example 1:
- velocityModelSpace _chopper; // returns [X (left(-) right(+)), Y (backward(-) forward(+)), Z (down(-) up(+))]
Additional Information
Notes
-
Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
- Posted on Dec 11, 2014 - 02:55 (UTC)
- This function is useful for helicopters as it returns Z vector like an indicator of thrust/load ratio. More or less climb (+) or descent (-) tendency but: As X,Y,Z vectors are relative to vehicle attitude, this function doesn't return a climb or descend rate (as the attitude of the vehicle can be far from horizontal). You can get negative Z vector, in jets, while climbing fast, peeling off in the sky! More or less, you can use as a Z accelerometer factor but invert the sign: +G acceleration (negative vector below the jet) is -Z here. If not "physically" correct, the behavior is sufficient enough for Arma flight model.
- Posted on Jun 21, 2015 - 02:36 (UTC)
- Previous note is physically incorrect. Velocity can not be used to give information about Thrust/Load ratio or G-Forces/acceleration. To get acceleration you have to create the derivative of velocity after time dv/dt -> the difference of velocity between 2 timesteps divided by the time that passed between the 2 steps.