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The radar is used to continually scan sectors. It is has a high [[Electric network|power]] demand and is a priority target of [[Enemies]]. It keeps a small area (7x7 chunks, ca. 221x221 tiles <ref>based on the central tile of radar structure chunk is in. This value is confirmed for 0.9.x </ref> ) updated about all enemy movements.
{{Languages}}
{{:Infobox:Radar}}
The radar reveals the map for the force it belongs to.


Radar explores one unexplored [[chunk]] when the sector scanning progress finishes up to distance of 14 chunks. It slowly discovers a large area of the map. In other words: As long as you provide the radar with enough energy, it reveals a [[chunk]] every (???) seconds.
It can be used to provide a small area of remote vision on the map; it also allows periodic scanning of distant chunks around it. The Radar has a high [[Electric system|power]] demand (300kW) so a radar indirectly contributes to [[pollution]] when powered by [[boiler]]s and [[Steam engine|steam engines]]. A radar can be continuously powered by eight solar panels and six accumulators. Seven solar panels and five accumulators is the most efficient; it gives the radar full power all but a short time in the morning, but never dips below the 20% power threshold for nearby scanning.


When the radar finishes the sector process, it finds the chunk in the area that wasn't scanned for the '''longest time''' and rescan it.
The radar will be attacked by enemies that come within very close range, like turrets, due to its status as a military building, but will not attract biters from long range like polluting structures do. The radar will show enemy lifeforms and structures, as well as [[Railway#Trains|trains]], [[Car|cars]], and other [[player]]s in the scanned area.
In the start these are the chunks that are not charted at all and they get discovered.
Once the radar discovers all the chunks in the area, it will start updating chunks again.


So it is always possible, to build more radars, to get more frequent update of the surrounding area.
== Nearby Pulse Scanning ==


See also
The Radar continuously charts an area of 7×7 [[Map_structure#Chunk|chunks]] (224×224 [[Map_structure#Tile|tiles]]), centered on the chunk the radar occupies. This nearby area is updated as a single pulse approximately every second. At reduced power levels, this nearby pulse scan will take longer, which can lead to 'blinking' on the player's map similar to the long range scan. This is particularly noticeable at dawn and dusk on solar powered radar stations.


* [http://www.factorioforums.com/forum/viewtopic.php?f=5&t=3362 long term radar behavior].
At 20% power the radar will pulse about every 4 seconds which will still keep the nearby area continuously lit on the map, but will provide reduced detail. 20% power can be achieved by a single [[solar panel]], or by using one isolating accumulator for every 5 radars.
* [http://www.factorioforums.com/forum/viewtopic.php?f=8&t=3925 Self sufficient radar outpost].
 
* [http://www.factorioforums.com/forum/viewtopic.php?f=18&t=5793 Self defending independent radar layout].
== Long Range Survey Scanning ==
 
The Radar charts one distant [[Map_structure#Chunk|chunk]] every time the sector scanning progress bar fills. This will take 33.333 seconds, if the Radar is receiving full power. Mouse-over or click-open the radar details to see this progress bar. Long range scanning is visible on the map as a single chunk lighting up for several seconds, then slowly darkening.
 
* It scans the unexplored chunks first, represented by the black areas on the map. Note that it also generates the chunks if they weren't generated at the time of the scan.
* One chunk scan takes 10 MJ of energy to complete. Since the Radar draws 300 kW of power, it takes 10 MJ ÷ 300 kW = 33.333 seconds to scan one chunk.
* This is done in an 29×29 chunks around the Radar, excluding the nearby 7×7 chunks.
** With a total number of 792 chunks (29×29 − 7×7), it takes one radar '''7 hours 20 minutes''' to complete one full scan cycle.
* If everything is already explored it continues to scan by re-scanning the longest-ago scanned chunk within range.
* Multiple radars will share long-range chunks, reducing the amount of time it takes to complete long-range survey scanning.
** This is a smart process, meaning that the radars will not scan chunks currently being scanned by other radars.
 
'''It is possible that a new alien nest will appear in a previously scanned chunk; just because you don't see it on the map, doesn't mean it is not there.
 
== Coverage ==
 
Radars grant sight of a square area around them, which is displayed brighter than the rest of the map. This allows the player to zoom into the normal world view from the map and makes interaction with [[blueprint]]s and [[deconstruction planner]]s possible.
 
[[File:Radar_coverage.png|thumb|500px|none|The coverage area of a radar and the player.]]
 
== Charting ==
 
If a [[Map_structure#Chunk|chunk]] is '''scanned''' by a radar or player, the image of that chunk that is copied into the map of the players of this surface force (every force has its own map).
 
This procedure is called "charting".
 
[[File:radar_revealing_sectors.gif|thumb|220px|Animation of chunks in the upper-right area being revealed by radars.]]
 
=== Charting Process ===
 
If the contents of a chunk changes between two ticks, the content of that chunk is "charted" into the map. The map is just a bitmap, a picture. You can see the entities moving, you can see enemies walking. Every entity is represented by one or more pixels. Not every entity is drawn. Users can recognize what is drawn because of the color.
 
Charting of several chunks that change each tick might have an impact on game performance, manifesting in the form of lowered <abbr title="Updates Per Second">UPS</abbr> or <abbr title="Frames Per Second">FPS</abbr>.
 
=== Charting Decay Time / Fog of War ===
 
Once a scan for a chunk is triggered, it keeps actively charted for '''10 seconds'''. This effect can also be seen in the map of the chunk highlighted and dims within 10 seconds to a greyed out version of the chunk.
 
If charting is not repeated within the 10 seconds, the charting process stops for this chunk after 10 seconds and is not longer updated. What you see after that time is the last charted picture for that chunk (also called "fog of war").
 
=== Charting of Vehicles ===
 
Even in the fog of war you can see the last charted position of vehicles. Trains last positions are not charted, because they normally always move after the charting stops.
 
Vehicles are shown as a circle, with an arrow pointing in the direction that they're facing.
 
=== Invisible (black) parts of the Map ===
 
The [[Map_generator#Invisible_chunks_.28fog_of_war.29|map generator]] creates a "border" of invisible chunks around each chunk, that becomes active at some time. Active chunks are those that become charted or those that are active because the pollution spreads onto them.
 
== History ==
{{history|0.17.0|
* When holding radar in cursor, area covered by existing radars is also highlighted on minimap.}}
 
{{history|0.15.0|
* Radar now allows remote view via map.}}
 
{{history|0.12.17|
* Updated icons.}}
 
{{history|0.11.11|
* Radar ignores chunks outside the map radius.}}
 
{{history|0.10.0|
* New graphics.}}
 
{{history|0.9.0|
* Halved radar electricity consumption.}}
 
{{history|0.7.3|
* Radar continues refreshing chunks after all chunks in range have been discovered.}}
 
{{history|0.5.1|
* New Graphics}}


{| class="wikitable"
{{history|0.1.0|
| '''Recipe:''' || {{icon|iron-plate|10|Iron plate}} + {{icon|iron-gear-wheel|5|Iron gear wheel}} + {{icon|electronic-circuit|5|Electronic circuit}} + {{icon|time icon|1|time}} => {{icon|radar|1|Radar}}
* Introduced}}
|-
| '''Total raw:''' || {{icon|iron-plate|25|Iron plate}} {{icon|copper-plate|7.5|Copper plate}}
|-
| '''Max power:''' || 300 kW ([[Electric network|electric]])
|-
|}


== See also ==
== See also ==
* [[Electric network]]
* [[Enemies]]
* [[Enemies]]
* [http://www.factorioforums.com/forum/viewtopic.php?f=5&t=3362 long term radar behavior].


== Notes ==
{{CombatNav}}
 
{{C|Defense}}
<references />
 
[[Category: Items]] [[Category: Electric network]] [[Category: Weapons]]

Latest revision as of 01:15, 6 November 2022

Radar.png
Radar

Radar entity anim.gif

Recipe

Time.png
0.5
+
Electronic circuit.png
5
+
Iron gear wheel.png
5
+
Iron plate.png
10
Radar.png
1

Total raw

Time.png
9.25
+
Copper plate.png
7.5
+
Iron plate.png
25

Recipe

Time.png
0.5
+
Electronic circuit.png
5
+
Iron gear wheel.png
5
+
Iron plate.png
10
Radar.png
1

Total raw

Time.png
15.5
+
Copper plate.png
20
+
Iron plate.png
40

Map color

Health

250

Resistances

Fire: 0/70%
Impact: 0/30%

Stack size

50

Dimensions

3×3

Energy consumption

300.0 kW (electric)

Mining time

0.1

Prototype type

radar

Internal name

radar

Required technologies

None required

Produced by

Assembling machine 1.png
Assembling machine 2.png
Assembling machine 3.png
Player.png

Consumed by

Artillery shell.png
Artillery targeting remote.png
Satellite.png
Spidertron.png
Spidertron remote.png

The radar reveals the map for the force it belongs to.

It can be used to provide a small area of remote vision on the map; it also allows periodic scanning of distant chunks around it. The Radar has a high power demand (300kW) so a radar indirectly contributes to pollution when powered by boilers and steam engines. A radar can be continuously powered by eight solar panels and six accumulators. Seven solar panels and five accumulators is the most efficient; it gives the radar full power all but a short time in the morning, but never dips below the 20% power threshold for nearby scanning.

The radar will be attacked by enemies that come within very close range, like turrets, due to its status as a military building, but will not attract biters from long range like polluting structures do. The radar will show enemy lifeforms and structures, as well as trains, cars, and other players in the scanned area.

Nearby Pulse Scanning

The Radar continuously charts an area of 7×7 chunks (224×224 tiles), centered on the chunk the radar occupies. This nearby area is updated as a single pulse approximately every second. At reduced power levels, this nearby pulse scan will take longer, which can lead to 'blinking' on the player's map similar to the long range scan. This is particularly noticeable at dawn and dusk on solar powered radar stations.

At 20% power the radar will pulse about every 4 seconds which will still keep the nearby area continuously lit on the map, but will provide reduced detail. 20% power can be achieved by a single solar panel, or by using one isolating accumulator for every 5 radars.

Long Range Survey Scanning

The Radar charts one distant chunk every time the sector scanning progress bar fills. This will take 33.333 seconds, if the Radar is receiving full power. Mouse-over or click-open the radar details to see this progress bar. Long range scanning is visible on the map as a single chunk lighting up for several seconds, then slowly darkening.

  • It scans the unexplored chunks first, represented by the black areas on the map. Note that it also generates the chunks if they weren't generated at the time of the scan.
  • One chunk scan takes 10 MJ of energy to complete. Since the Radar draws 300 kW of power, it takes 10 MJ ÷ 300 kW = 33.333 seconds to scan one chunk.
  • This is done in an 29×29 chunks around the Radar, excluding the nearby 7×7 chunks.
    • With a total number of 792 chunks (29×29 − 7×7), it takes one radar 7 hours 20 minutes to complete one full scan cycle.
  • If everything is already explored it continues to scan by re-scanning the longest-ago scanned chunk within range.
  • Multiple radars will share long-range chunks, reducing the amount of time it takes to complete long-range survey scanning.
    • This is a smart process, meaning that the radars will not scan chunks currently being scanned by other radars.

It is possible that a new alien nest will appear in a previously scanned chunk; just because you don't see it on the map, doesn't mean it is not there.

Coverage

Radars grant sight of a square area around them, which is displayed brighter than the rest of the map. This allows the player to zoom into the normal world view from the map and makes interaction with blueprints and deconstruction planners possible.

The coverage area of a radar and the player.

Charting

If a chunk is scanned by a radar or player, the image of that chunk that is copied into the map of the players of this surface force (every force has its own map).

This procedure is called "charting".

Animation of chunks in the upper-right area being revealed by radars.

Charting Process

If the contents of a chunk changes between two ticks, the content of that chunk is "charted" into the map. The map is just a bitmap, a picture. You can see the entities moving, you can see enemies walking. Every entity is represented by one or more pixels. Not every entity is drawn. Users can recognize what is drawn because of the color.

Charting of several chunks that change each tick might have an impact on game performance, manifesting in the form of lowered UPS or FPS.

Charting Decay Time / Fog of War

Once a scan for a chunk is triggered, it keeps actively charted for 10 seconds. This effect can also be seen in the map of the chunk highlighted and dims within 10 seconds to a greyed out version of the chunk.

If charting is not repeated within the 10 seconds, the charting process stops for this chunk after 10 seconds and is not longer updated. What you see after that time is the last charted picture for that chunk (also called "fog of war").

Charting of Vehicles

Even in the fog of war you can see the last charted position of vehicles. Trains last positions are not charted, because they normally always move after the charting stops.

Vehicles are shown as a circle, with an arrow pointing in the direction that they're facing.

Invisible (black) parts of the Map

The map generator creates a "border" of invisible chunks around each chunk, that becomes active at some time. Active chunks are those that become charted or those that are active because the pollution spreads onto them.

History

  • 0.17.0:
    • When holding radar in cursor, area covered by existing radars is also highlighted on minimap.
  • 0.15.0:
    • Radar now allows remote view via map.
  • 0.11.11:
    • Radar ignores chunks outside the map radius.
  • 0.9.0:
    • Halved radar electricity consumption.
  • 0.7.3:
    • Radar continues refreshing chunks after all chunks in range have been discovered.

See also