Difference between revisions of "Tutorial - Beam Weapons"

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This is a short tutorial into both making of beam weapons and in tweaking them. Some knowledge on table editing is usefull and as is basic understanding of [[Weapons.tbl]].
 
  
'''Please post any comments or questions conserning the beam weapons tutorial to the [[Talk:Tutorial_-_Beam_Weapon|talk page]]'''
+
This is a short tutorial detailing the exact functions of various parameters for Beam weapons in [[Weapons.tbl]]. Some knowledge on table editing is useful as well as having a basic understanding of [[Weapons.tbl]].
 +
 
 +
'''Please post any comments or questions concerning the beam weapons tutorial in the [[Talk:Tutorial_-_Beam_Weapon|Discussion Page]]'''.
 
<br><br>
 
<br><br>
 
==Making a Basic Beam Weapon==
 
==Making a Basic Beam Weapon==
 +
 +
===Setting Basic Values===
 +
 +
<pre>$Name:                          S-AAA-Weak
 +
$Model File:                    none ; laser1-1.pof
 +
@Laser Bitmap:                  laserglow01
 +
@Laser Color: 250, 30, 30
 +
@Laser Length: 0.0
 +
@Laser Head Radius: 0.60
 +
@Laser Tail Radius: 0.60</pre>
 +
 +
'''$Name:''' is obviously the name of the weapon, this is the name you will be giving FRED for weapons.
 +
 +
'''@Laser Color''' affects the color that the beam lights up surrounding objects when it fires.
 +
 +
<pre>$Mass:                            100.0
 +
$Velocity:                        1000.0
 +
$Fire Wait:                      5.0</pre>
 +
 +
'''$Mass:''' value is used with beams to define the force with which it pulls (negative value) or pushes (positive value) the target. Setting to zero prevents 'beam whacking'.
 +
 +
'''$Velocity:''' value is used for determining targeting range and also, for certain beam types, its accuracy.
 +
 +
'''$Fire Wait:''' value set the delay between individual beam firings in seconds.
 +
 +
<pre>$Damage:                          5
 +
$Armor Factor:                    1.0
 +
$Shield Factor:                  1.0
 +
$Subsystem Factor:                1.0</pre>
 +
 +
When creating beam weapons, it is very important to notice that the defined damage is continuous. To get damage caused per second, you must multiply this value by 5.88. Also to get full damage potential of the beam, you have to first multiply the damage with the 5.88 and then with the beam life value. Other values are used as with other weapons to determine damage multipliers against hulls, shields and subsystems.
 +
 +
5.88 is an appropriation, but a close enough one for any reasonable needs. If you're curious, the exact factor is 100/17, amounting to one 'pulse' of damage every 170 milliseconds. You may see find or receive information saying 5.5 instead, which was once a more useful number due to engine flaws that have since been fixed.
 +
 +
<pre>$Lifetime:                      60.0
 +
$Energy Consumed:              0.30
 +
$Cargo Size:                    0.0
 +
$Homing:                        NO
 +
$LaunchSnd:                    124
 +
$ImpactSnd:                    88
 +
+Weapon Range: 1500
 +
$Flags:                        ( "Big Ship" "beam" )</pre>
 +
 +
'''$Lifetime:''' argument is used with beams for the same purposes as the earlier '''$Velocity:''' argument.
 +
 +
'''$Energy Consumed:''' affects only fighter beams and defines the rate at which they consume ship weapon bank energy.
 +
 +
'''$Flags:''' is used to give certain parameters to the weapon. Beam weapons must have the "beam" flag.
 +
 +
<pre>$Icon:                          icongun05
 +
$Anim:                          LoadGun07
 +
$Impact Explosion:              ExpMissileHit1
 +
$Impact Explosion Radius:      10.0</pre>
 +
 +
'''$Impact Explosion:''' and '''$Impact Explosion Radius:''' are used to define the explosion effect and its size on the target, should the beam hit something.
 +
 +
===Setting Beaminfo Values===
 +
 +
<pre>+Type: 3
 +
+Life:   3
 +
+Warmup:   500
 +
+Warmdown: 1000
 +
+Radius:   10.0
 +
+PCount: 15
 +
+PRadius: 1.2
 +
+PAngle: 65.0
 +
+PAni: particleexp01
 +
+Miss Factor:         6.0 5.0 4.0 3.0 1.5
 +
+BeamSound: 121
 +
+WarmupSound:         122
 +
+WarmdownSound:         123
 +
+Muzzleglow:         thrusterglow01
 +
+Shots: 3
 +
+ShrinkFactor:         0.0
 +
+ShrinkPct: 0.0
 +
$Section:
 +
+Width:       1.0
 +
+Texture:       beam-red
 +
+RGBA Inner:               255 255 255 255
 +
+RGBA Outer:               150 150 150 10
 +
+Flicker:       0.1
 +
+Zadd:       2.0</pre>
 +
 +
See [[Weapons.tbl#$BeamInfo:|$BeamInfo:]] in [[Weapons.tbl]]
  
 
==Adding Beam Sections==
 
==Adding Beam Sections==
  
Adding new beam sections is rather straightforward when it is done with '''weapons.tbl''', however there may be problems when using '''*-wep.tbm'''s to add or change existing beam sections if the additional '''+Index:''' table option is not properly used. If no index number is given to a beam section in -wep.tbm game assumes it to be an additional beam texture even if it wouldnt be completely defined. However if you define index for the beam section you can edit an existing beam section instead of adding new ones.
+
The process of adding new beam sections is rather straightforward when it is done directly with [[Weapons.tbl]]. However, there may be problems with using '''*-wep.tbm'''s to add or change existing beam sections if the additional [[Weapons.tbl#$BeamInfo:|+Index:]] table option is not used properly. If no index number is given to a beam section in the '''*-wep.tbm''', the game assumes it to be an additional beam texture even if it wouldn't be completely defined. However, if you define index for the beam section you can edit an existing beam section in addition to creating new ones.
  
 
==Different Beam Types==
 
==Different Beam Types==
  
Beam types in FreeSpace open are clearly different from each other. Understanding their differences and also their unique features is usefull in creating or editing beam weapon's table entry.
+
Beam types in [[FreeSpace Open]] are clearly different from each other. Understanding their differences and unique features is useful for all tablers.
  
  
 
===Type 0 Beams===
 
===Type 0 Beams===
  
Type 0 beams are basic straightfiring beam weapons without anything additional features. They use '''+Miss Factor:''' values for determining weapon accuracy. Generally if they hit their target they will cause full damage. Type 0 beams do not function as fighter beams.
+
Type 0 beams are basic, straight-firing beam weapons without any additional features. They use [[Weapons.tbl#$BeamInfo:|+Miss Factor:]] values for determining weapon accuracy. Generally speaking, if they hit their target, they will cause full damage. Type 0 beams do not function as fighter beams.
  
Few examples are [[SGreen]], [[BGreen]] and [[BFRed]].
+
[[SGreen]], [[BGreen]] and [[BFRed]] are Type 0 beams.
  
  
 
===Type 1 Beams===
 
===Type 1 Beams===
  
Type 1 beams are slashing beams. These beams use certain target models size (or more precisely, octants) in determining the lenght of the slash and tend to miss fairly often. They also use '''+Miss Factor:''' values for determining weapon accuracy. Generally it is very rare occurrance if they cause full damage however slashing beams tend to damage ship subsystems as well as the hull quite efficiently unlike type 0 beams. Type 1 beams do not function as fighter beams.
+
Type 1 beams are slashing beams. These beams use the target's size (or more precisely, models octants) in determining the length of the slashing movement. They might also use '''+Miss Factor:''' values for determining weapon accuracy. Only on very rare occasions do slash beams inflict full damage, as they go wide off the target in both the starting and ending points of the slashing movement. However, slashing beams tend to damage target's subsystems quite efficiently, unlike Type 0 beams. Type 1 beams do not function as fighter beams.
  
Few examples are [[TerSlash]], and [[VSlash]].
+
[[TerSlash]] and [[VSlash]] are 'slashing beams'.
  
  
 
===Type 2 Beams===
 
===Type 2 Beams===
 +
Type 2 beams are direct-fire beams. When mounted on turrets, they operate as Type 0 beams. However, they can be used as fighter beams. When used as fighter beams, they disregard the '''+Miss Factor:''' value.
  
Type 2 beams are direct fire beams. When mounted on turrets they operate as type 0 beams however they can be used as fighter beams. When used as fighter beams they disregard any '''+Miss Factor:''' settings.
+
The only example is the [[Targeting Laser]].
  
  
 
===Type 3 Beams===
 
===Type 3 Beams===
 +
Type 3 beams are also known as anti-fighter beams and unlike other beam types, they have different behaviors depending on the type of its target. Against small targets, or more precisely against targets defined with certain [[Objecttypes.tbl#$Beams_Easily_Hit:|Objecttypes.tbl]] options, they fire a number of short beam pulses (defined with [[Weapons.tbl#$BeamInfo:|+Shots:]] that have their total combined lifetime equal to the defined lifetime of the beam. Against larger targets, they behave exactly like Type 0 beams. In both cases the beam uses '''+Miss Factor:''' values for its accuracy. Type 3 beams do not function as fighter beams.
  
Type 3 beams have different behaviours depending on the type of its target. Against small targets, or more precisely against targets defined with this certain [[Objecttypes.tbl#$Beams_Easily_Hit:|Objecttypes.tbl]] option, they fire a number of short beam pulses (defined with '''+Shots:''') that have their total lifetime equal to the defined lifetime of the beam. Against larger targets they behave exactly like type 0 beams. In both cases the beam use '''+Miss Factor:''' values for it's accuracy. Type 3 beams do not function as fighter beams.
+
[[AAAf]] and [[SAAA]] are such beams.
 
 
Few examples are [[AAAf]], and [[SAAA]].
 
  
  
 
===Type 4 Beams===
 
===Type 4 Beams===
  
Type 4 beams are direct fire beams that fire only along the firing turrets normal. If mounted on single-part turret they will only fire where that turret's normal is pointing in similar manner as the 'swarm primaries' - that is they wont anything unless using extremely strict mission design - but with multi-part turrets function quite nicely. They do not '''+Miss Factor:''' values for determining weapon accuracy and this can make these beams exceesingly deadly however unlike other beam weapons these will become inaccurate if firing ship's weapons subsystem is damaged.
+
Type 4 beams are direct-fire beams that fire only along the firing turret's normal. If mounted on a single-part turret, they will only fire where that turret's normal is pointing in similar manner as the unguided [[Weapons.tbl#$Swarm:|swarm]] weapons - that is, they won't hit anything unless using extremely strict mission design - but with multi-part turrets, they function quite nicely. They do not use '''+Miss Factor:''' values for determining weapon accuracy and this can make these beams exceedingly deadly. However, unlike other beam weapons, these will become inaccurate if the firing ship's weapons subsystem is damaged.
 
 
There are no examples of this beam type.
 
  
 +
The only example is the [[MjolnirBeam]]'s fixed version.
  
 
==Adjusting Beam Ranges and Accuracy==
 
==Adjusting Beam Ranges and Accuracy==
 +
Beam weapons use several different table options for setting their effective ranges.
  
Beam weapons use several different table options for setting the beam ranges.
+
===Beam Targeting Ranges===
 
 
===Beam Targetting Ranges===
 
  
Generally beams target any legal - that is anything not protected by other weapon settings such as 'huge' - target withing the set [[Weapons.tbl#.2BWeapon_Range:|weapon range]]. However this range can be set by using [[Weapons.tbl#.2BWeapon Range:|+Weapon Range:]] and [[Weapons.tbl#.2BWeapon Min Range:|+Weapon Min Range:]] for setting the maximum and minimum targetting ranges respectively. It should be also noted that beams do use the range calculated for other weapons as well (''lifetime x Velocity'') despite the fact they actually do not use these values for anything else. That if the ''lifetime x velocity'' is smaller than the set ''weapon range'' then beam uses the ''lifetime x velocity'' for determining the maximum range. AI uses this range for determining when to and against how distant targets they fire the beam weapons.
+
Generally speaking, beams target anything not protected by other weapon settings such as 'huge' within the set [[Weapons.tbl#.2BWeapon_Range:|weapon range]]. However, this range can be defined by using [[Weapons.tbl#.2BWeapon Range:|+Weapon Range:]] and [[Weapons.tbl#.2BWeapon Min Range:|+Weapon Min Range:]] for setting the maximum and minimum targeting ranges, respectively. It should be also noted that beams do use the range calculated for other weapons as well (''lifetime x velocity'') despite the fact they actually do not need these values for anything else. If the ''lifetime x velocity'' is smaller than the set ''weapon range'' then beam uses the ''lifetime x velocity'' for determining its maximum range. The AI uses this range for determining when to fire the beam weapon.
  
 
===Actual Beam Range===
 
===Actual Beam Range===
  
Normally beam range is 30 000 m. This can however be adjusted using '''+Range:''' option under [[Weapons.tbl#$BeamInfo:|$BeamInfo:]] in weapons.tbl. This effectively stops or rather dissipates (not a sharp ending) the beam at that range. It is worth noting that if the '''''actual beam range''''' is shorter than the set '''''beam targetting range''''' then AI will start firing the beam against targets beyond its range.
+
Beam range is 30 000 m under standard circumstances. This can, however, be adjusted using the '''+Range:''' option under [[Weapons.tbl#$BeamInfo:|$BeamInfo:]] in weapons.tbl. This effectively stops or rather dissipates (not a sharp ending) the beam at that range. It is worth noting that if the '''''actual beam range''''' is shorter than the set '''''beam targeting range''''', the AI will start firing the beam against targets beyond its range.
  
 
===Beam Accuracy===
 
===Beam Accuracy===
  
Normally beam accuracy is determined with '''+Miss Factor:''' that uses set accuracy values for each difficulty level. Higher values increase the change of beams missing their targets. However direct fire beams (type 2 beams as fighter beams or type 4 beams in turrets) use normal targetting 'rules'. That is they use the weapon velocity, target velocity, and range for calculating lead for the target. As beams are instantanous this causes the beams to miss their targets or rather AI to fire its' beams exactly in front of the target.
+
Normally, beam accuracy is determined by '''+Miss Factor:''' values that uses set accuracy values for each difficulty level. Higher values increase the chance of beams missing their targets. However, direct-fire beams (Type 2 or Type 4 beams as fighter beams and Type 4 beams in multi-part turrets) use the weapon velocity, target velocity, and range for calculating lead for the target. As beams are instantaneous, this causes the beams to miss their targets or rather AI to fire its beam to a point exactly in front of the target.
  
 
==Adjusting Beam Textures==
 
==Adjusting Beam Textures==
  
Beam textures are - by default - used ingame by stretching the single bitmap over the whole lenght of the beam. It is worthwhile to notice that if beam hits anything its lenght is limited to the impact point. This may cause very erratic beam texture behaviour if the bitmap used was not uniform. Animations (both .ani and .eff) can be used instead normal bitmaps for beams textures.
+
Beam textures are - by default - used in game by stretching the single bitmap over the whole length of the beam. It is worthwhile to notice that if beam hits anything, its drawing length is limited to the distance from the firing point to the impact point. This may cause very erratic beam texture behavior if the used bitmap was not uniform. Animations (both .ani and .eff) can be used instead normal bitmaps for beams textures.
  
===Adjusting Tile Lenght===
+
===Adjusting Tile Length===
  
Instead of letting the game stretch the bitmap over the whole lenght of the beam the tiling of the beam texture can be adjusted in different methods. To use these methods for adjusting beam texture tiling we have to use '''+Tile Factor:''' option under the beam section that is to be modified. Tile factor requires two arguments of which the first one (either 0 or 1) will determine the actual texture tiling method.  
+
Instead of letting the game stretch the bitmap over the whole length of the beam the tiling of the beam texture can be adjusted with two different methods. To use these methods for adjusting beam texture tiling, we have to use '''+Tile Factor:''' under the beam section. Tile factor requires two arguments of which the second one (either 0 or 1) will determine the actual texture tiling method.  
 
<br><br>
 
<br><br>
 
'''Tiling Method '0''''
 
'''Tiling Method '0''''
  
Method '0' sets the beam texture to be tiled in similar way as the default method but with one difference. You can define how many times the texture tiles is used in beam - default option is the same as '''+Tile Factor: 0, 1'''. However stretching is again possible issue.
+
Method #0 sets the beam texture to be tiled in similar way as the default method but with one difference. You can define how many times the texture tile is used in beam - default option is the same as '''+Tile Factor: 1, 0'''. However, stretching is again possible.
 
<br><br>
 
<br><br>
 
'''Tiling Method '1''''
 
'''Tiling Method '1''''
  
Using method '1' for setting the beam texture tiling allows us to set the lenght of the tiles used in the beam texture. So when using this method the number of tiles shown on screen does depends on the lenght of the beam and stretching issues shouldnt as probable as with the method '0'.
+
Using Method #1 for setting the beam texture tiling allows us to use the first value to define the length of the beam tiles used in the beam texture. So, when using this method, the number of tiles shown on screen does depends on the length of the beam and stretching shouldn't be visible at all.
 
<br><br>
 
<br><br>
 
===Setting Beam Translation Values===
 
===Setting Beam Translation Values===
  
Translation values allow us to move the beam tiles without actually using animations with them. The translation is set with '''+Translation:''' option under the beam section that is to be modified. Positive values cause the textures to move from the impact point towards the firing point and negative values cause the textures to move from firing point towars the impact point.
+
Translation values allow us to move the beam tiles without actually using animations with them. The translation is set with the '''+Translation:''' option under the beam section that is to be modified. Positive values cause the textures to move from the impact point towards the firing point and negative values force the textures to move from the firing point towards the impact point.
  
 
==Beam Damage Attenuation==
 
==Beam Damage Attenuation==
  
Damage from the beam weapons can be set to attenuate using the '''+Attenuation:''' option under the '''$BeamInfo:'''. It determines the point from where the damage attenuation begins. It accepts values from 0 to 1. With 1 the attenuation has no effect at all as the then the attenuation 'starts' at the maximum range of the beam. When using 0 however the damage attenuation starts from the firing point so that the beam doesnt do any damage in its set maximum range (defined with '''+Range:''', '''''not''''' with ''+Weapon Range:'').
+
Damage from the beam weapons can be set to attenuate using the '''+Attenuation:''' option under the '''$BeamInfo:'''. It determines the point from where the damage attenuation begins. It accepts values from 0 to 1. With 1 the attenuation has no effect at all as the then the attenuation 'starts' at the maximum range of the beam. When using 0, however, the damage attenuation starts from the firing point so that the beam doesn't do any damage in its set maximum range (defined with '''+Range:''', '''''not''''' with ''+Weapon Range:'').
  
 
[[Category:Tutorials|Beam Weapons]]
 
[[Category:Tutorials|Beam Weapons]]

Latest revision as of 03:12, 27 November 2020

This is a short tutorial detailing the exact functions of various parameters for Beam weapons in Weapons.tbl. Some knowledge on table editing is useful as well as having a basic understanding of Weapons.tbl.

Please post any comments or questions concerning the beam weapons tutorial in the Discussion Page.

Making a Basic Beam Weapon

Setting Basic Values

$Name:                          S-AAA-Weak
$Model File:                    none ; laser1-1.pof
@Laser Bitmap:                  laserglow01
@Laser Color:					250, 30, 30
@Laser Length:					0.0
@Laser Head Radius:				0.60
@Laser Tail Radius:				0.60

$Name: is obviously the name of the weapon, this is the name you will be giving FRED for weapons.

@Laser Color affects the color that the beam lights up surrounding objects when it fires.

$Mass:                            100.0
$Velocity:                        1000.0
$Fire Wait:                       5.0

$Mass: value is used with beams to define the force with which it pulls (negative value) or pushes (positive value) the target. Setting to zero prevents 'beam whacking'.

$Velocity: value is used for determining targeting range and also, for certain beam types, its accuracy.

$Fire Wait: value set the delay between individual beam firings in seconds.

$Damage:                          5
$Armor Factor:                    1.0
$Shield Factor:                   1.0
$Subsystem Factor:                1.0

When creating beam weapons, it is very important to notice that the defined damage is continuous. To get damage caused per second, you must multiply this value by 5.88. Also to get full damage potential of the beam, you have to first multiply the damage with the 5.88 and then with the beam life value. Other values are used as with other weapons to determine damage multipliers against hulls, shields and subsystems.

5.88 is an appropriation, but a close enough one for any reasonable needs. If you're curious, the exact factor is 100/17, amounting to one 'pulse' of damage every 170 milliseconds. You may see find or receive information saying 5.5 instead, which was once a more useful number due to engine flaws that have since been fixed.

$Lifetime:                      60.0
$Energy Consumed:               0.30
$Cargo Size:                    0.0
$Homing:                        NO
$LaunchSnd:                     124
$ImpactSnd:                     88
+Weapon Range:					1500
$Flags:                         ( "Big Ship" "beam" )

$Lifetime: argument is used with beams for the same purposes as the earlier $Velocity: argument.

$Energy Consumed: affects only fighter beams and defines the rate at which they consume ship weapon bank energy.

$Flags: is used to give certain parameters to the weapon. Beam weapons must have the "beam" flag.

$Icon:                          icongun05
$Anim:                          LoadGun07
$Impact Explosion:              ExpMissileHit1
$Impact Explosion Radius:       10.0

$Impact Explosion: and $Impact Explosion Radius: are used to define the explosion effect and its size on the target, should the beam hit something.

Setting Beaminfo Values

+Type:						3
+Life:			  			3
+Warmup:		  			500
+Warmdown:					1000
+Radius:		  			10.0
+PCount:					15
+PRadius:					1.2
+PAngle:					65.0
+PAni:						particleexp01
+Miss Factor:				        6.0 5.0 4.0 3.0 1.5
+BeamSound:					121
+WarmupSound:				        122
+WarmdownSound:				        123
+Muzzleglow:				        thrusterglow01
+Shots:						3
+ShrinkFactor:				        0.0
+ShrinkPct:					0.0
$Section:
	+Width:					      1.0
	+Texture:				      beam-red
	+RGBA Inner:			              255 255 255 255
	+RGBA Outer:			              150 150 150 10
	+Flicker:				      0.1
	+Zadd:					      2.0

See $BeamInfo: in Weapons.tbl

Adding Beam Sections

The process of adding new beam sections is rather straightforward when it is done directly with Weapons.tbl. However, there may be problems with using *-wep.tbms to add or change existing beam sections if the additional +Index: table option is not used properly. If no index number is given to a beam section in the *-wep.tbm, the game assumes it to be an additional beam texture even if it wouldn't be completely defined. However, if you define index for the beam section you can edit an existing beam section in addition to creating new ones.

Different Beam Types

Beam types in FreeSpace Open are clearly different from each other. Understanding their differences and unique features is useful for all tablers.


Type 0 Beams

Type 0 beams are basic, straight-firing beam weapons without any additional features. They use +Miss Factor: values for determining weapon accuracy. Generally speaking, if they hit their target, they will cause full damage. Type 0 beams do not function as fighter beams.

SGreen, BGreen and BFRed are Type 0 beams.


Type 1 Beams

Type 1 beams are slashing beams. These beams use the target's size (or more precisely, models octants) in determining the length of the slashing movement. They might also use +Miss Factor: values for determining weapon accuracy. Only on very rare occasions do slash beams inflict full damage, as they go wide off the target in both the starting and ending points of the slashing movement. However, slashing beams tend to damage target's subsystems quite efficiently, unlike Type 0 beams. Type 1 beams do not function as fighter beams.

TerSlash and VSlash are 'slashing beams'.


Type 2 Beams

Type 2 beams are direct-fire beams. When mounted on turrets, they operate as Type 0 beams. However, they can be used as fighter beams. When used as fighter beams, they disregard the +Miss Factor: value.

The only example is the Targeting Laser.


Type 3 Beams

Type 3 beams are also known as anti-fighter beams and unlike other beam types, they have different behaviors depending on the type of its target. Against small targets, or more precisely against targets defined with certain Objecttypes.tbl options, they fire a number of short beam pulses (defined with +Shots: that have their total combined lifetime equal to the defined lifetime of the beam. Against larger targets, they behave exactly like Type 0 beams. In both cases the beam uses +Miss Factor: values for its accuracy. Type 3 beams do not function as fighter beams.

AAAf and SAAA are such beams.


Type 4 Beams

Type 4 beams are direct-fire beams that fire only along the firing turret's normal. If mounted on a single-part turret, they will only fire where that turret's normal is pointing in similar manner as the unguided swarm weapons - that is, they won't hit anything unless using extremely strict mission design - but with multi-part turrets, they function quite nicely. They do not use +Miss Factor: values for determining weapon accuracy and this can make these beams exceedingly deadly. However, unlike other beam weapons, these will become inaccurate if the firing ship's weapons subsystem is damaged.

The only example is the MjolnirBeam's fixed version.

Adjusting Beam Ranges and Accuracy

Beam weapons use several different table options for setting their effective ranges.

Beam Targeting Ranges

Generally speaking, beams target anything not protected by other weapon settings such as 'huge' within the set weapon range. However, this range can be defined by using +Weapon Range: and +Weapon Min Range: for setting the maximum and minimum targeting ranges, respectively. It should be also noted that beams do use the range calculated for other weapons as well (lifetime x velocity) despite the fact they actually do not need these values for anything else. If the lifetime x velocity is smaller than the set weapon range then beam uses the lifetime x velocity for determining its maximum range. The AI uses this range for determining when to fire the beam weapon.

Actual Beam Range

Beam range is 30 000 m under standard circumstances. This can, however, be adjusted using the +Range: option under $BeamInfo: in weapons.tbl. This effectively stops or rather dissipates (not a sharp ending) the beam at that range. It is worth noting that if the actual beam range is shorter than the set beam targeting range, the AI will start firing the beam against targets beyond its range.

Beam Accuracy

Normally, beam accuracy is determined by +Miss Factor: values that uses set accuracy values for each difficulty level. Higher values increase the chance of beams missing their targets. However, direct-fire beams (Type 2 or Type 4 beams as fighter beams and Type 4 beams in multi-part turrets) use the weapon velocity, target velocity, and range for calculating lead for the target. As beams are instantaneous, this causes the beams to miss their targets or rather AI to fire its beam to a point exactly in front of the target.

Adjusting Beam Textures

Beam textures are - by default - used in game by stretching the single bitmap over the whole length of the beam. It is worthwhile to notice that if beam hits anything, its drawing length is limited to the distance from the firing point to the impact point. This may cause very erratic beam texture behavior if the used bitmap was not uniform. Animations (both .ani and .eff) can be used instead normal bitmaps for beams textures.

Adjusting Tile Length

Instead of letting the game stretch the bitmap over the whole length of the beam the tiling of the beam texture can be adjusted with two different methods. To use these methods for adjusting beam texture tiling, we have to use +Tile Factor: under the beam section. Tile factor requires two arguments of which the second one (either 0 or 1) will determine the actual texture tiling method.

Tiling Method '0'

Method #0 sets the beam texture to be tiled in similar way as the default method but with one difference. You can define how many times the texture tile is used in beam - default option is the same as +Tile Factor: 1, 0. However, stretching is again possible.

Tiling Method '1'

Using Method #1 for setting the beam texture tiling allows us to use the first value to define the length of the beam tiles used in the beam texture. So, when using this method, the number of tiles shown on screen does depends on the length of the beam and stretching shouldn't be visible at all.

Setting Beam Translation Values

Translation values allow us to move the beam tiles without actually using animations with them. The translation is set with the +Translation: option under the beam section that is to be modified. Positive values cause the textures to move from the impact point towards the firing point and negative values force the textures to move from the firing point towards the impact point.

Beam Damage Attenuation

Damage from the beam weapons can be set to attenuate using the +Attenuation: option under the $BeamInfo:. It determines the point from where the damage attenuation begins. It accepts values from 0 to 1. With 1 the attenuation has no effect at all as the then the attenuation 'starts' at the maximum range of the beam. When using 0, however, the damage attenuation starts from the firing point so that the beam doesn't do any damage in its set maximum range (defined with +Range:, not with +Weapon Range:).