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[Obsolete] Active Radar Homing Script

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=688803417

This script operates the same way as the real life Active Radar Homing Missile Guidance. It is used to setup a true Fire and Forget homing missile. All the required target locking and missile homing are packaged into this script, therefore the launching ship only needs to trigger the timer loop to run this script.

This is a vanilla script. No mods are required.

This script is designed to intercept fast moving targets, with a lockable closing speed limit of up to ~1600m/s. No point using on slow moving targets as the locking methods are very CPU intensive.



1) Active Radar Homing - The missile maintains the lock by using GetFreeDestination() of Remote Control block to trace a locking beam to the target.
2) Orientation Auto Detection - All gyroscopes and thrusters can be mounted in any orientation. The script will auto detect the appropriate orientation and configure it accordingly.
3) Lead Target Function - By default the missile will try to lead the target, to correct the tail chasing problem.
4) Drift Function - This setting is used when your missile has no side thrusters. The drift function will perform over-steering to compensate for the drift. Can be activated by setting "boolDrift" to true.
5) Natural Gravity Dampener - Automatically spins the missile to face the thrusters against natural gravity. In this way, you can have thrusters on only one side, saving cost. To activate this, set "boolNaturalDampener" to true.



For Missile

- A Programmable block with this script.
- A Timer block loop to run this script. (Timer block calls "TriggerNow" of itself for looping and calls Programmable block "Run" to run this script)
- A reference block named V_MID in the middle.
- A reference block named V_FRONT directly in front of V_MID.
- A set of gyroscopes saved under group named GYROS.
- A set of backward facing thrusters saved under group named THRUSTERS.
- A Remote Control block named LREMOTE.
- A Merge Block -OR- Rotor block, either named as DISPATCH or saved under group named DISPATCH. Script will detach missile for launch via this block (The one closest to script block if many is detected).

- (Only if boolNaturalDampener is true) A reference block named V_DAMPENER positioned such that the direction from V_MID to V_DAMPENER is the same direction the side thrusters is going to face towards natural gravity. Set to true to use this feature.
- (Optional) A Sensor block named LSENSOR to be used for sensor lock on mode. *Sensor API changed, no longer working*

For Launching Ship

- A Remote Control block named REF_REMOTE.
- A reference block named REF_FRONT directly in front of REF_REMOTE.



Aim ship nose at target and trigger the timer block looping this script.
(The aiming is done using REF_REMOTE and REF_FRONT. Therefore position them in-line with the cockpit for easier and more intuitive aiming.)



1) Upon triggering this script loop, the missile will detach itself from ship via the closest Merge Block or Rotor block in the DISPATCH group.
2) The missile will initially use the launching ship's Remote Control block and pilot aiming (REF_REMOTE and REF_FRONT) to lock on to the target.
3) Once initial lock is achieved, missile will also use its own on-board Remote Control block to lock on to the same target.
4) Once on-board lock is stable, it will permanently switch to this on-board lock. (Fully Fire and Forget mode at this point)


You can also use a coordinate based method for the initial locking, instead of REF_REMOTE and REF_FRONT.
(E.g. Initial locking is done via Remote Targeting Script with target coordinates instead)

In this case, change strInitialCommandPanel string value to the name of the Text Panel to get the coordinates (e.g. CMD_TARGET_1).
Have another script update the coordinates to the Public Title of this specified Text Panel, in the format:

[T:<X>:<Y>:<Z>]

Where X, Y, Z is the coordinates (e.g. [T:12:34:56]).
Once the missile achieved a stable locking using its own on-board Remote Control block, it will ignore this coordinate and home on its own.



- If Drift Function is used and your vectorPointMid is far off from center of mass, use midToCenterOfMassDist to compensate. See video or screenshot for more information.



A demo world is setup to showcase this script:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=569582290

A script to conveniently launch missiles:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=564182124



midToCenterOfMassDist - How much distance in metres the center of mass is in front of the vectorMid used by the missile. (def: 0)
driftVectorReduction - For Drift mode only. Larger value results in smaller drift, smaller value results in more aggressive drifting. Do not reduce to less than 1. (def: 1.2)
boolNaturalDampener - Can be set to true to use Natural Gravity Dampener feature. (def: false)
boolDrift - Can be set to true to force over-steering. This is used to compensate for the lack of side thrusters, if your missile design is as such. (def: false)
boolLeadTarget - Can be set to true for script to lead the target. The script will calculate the interception point and aim there instead of the current target position. (def: true)
defaultLaunchSeconds - The default launch time in seconds. Missile will not steer during this period after launch to clear launch pad. (def: 1)



spinAmount - Amount of RPM to spin. Not compatible with boolNaturalDampener. (def: 0)
remoteTargetMinDist - Minimum distance allowed for Remote Control to lock on target. (def: 10)
remoteTargetMaxDist - Maximum distance allowed for Remote Control to lock on target. (def: 20000)
remoteInitialMinDist - Minimum distance allowed for the initial lock on. This is to prevent initially locking on to the missile itself. (def: 50)
remoteStabilizationTicks - Number of ticks of locking same target before switching from ship to missile Remote Control. (def: 30)
remoteStabilizationDist - Threshold distance between estimated path from ship to target and missile to target to declare lock stable. (def: 50)