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Chemistry: Difference between revisions
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|image = [[File:CAS Chemistry.jpg|235px]]
|caption = ''Choosing Sim's Turn on/Turn off.''
}}{{For|potions created from chemistry tables|Potion|
'''Chemistry''' is a system of measuring attraction between Sims in ''[[The Sims 2]]''. The ability of Sims to form a romantic relationship is affected by the Sims' chemistry towards each other. Chemistry is controlled by many factors, including turn-ons and turn-offs, personality and aspirations. Levels of chemistry between two Sims is indicated by the presence of "lightning bolts" on a Sim's portrait in the relationship panel, up to three bolts, indicating high chemistry. Sims with bad chemistry will have a single "crossed out" lightning bolt over their relationship panel portrait instead.
'''Chemistry''' was introduced in the ''[[Nightlife]]'' expansion of ''[[The Sims 2]]''. It is present in all [[expansion pack]]s and stuff packs released after ''Nightlife''. Until the introduction of chemistry, Sims were attracted to each other fairly easily. Only a massive divergence of interests would harm two Sims' relationships, but even that could be overcome with a bit of work.▼
Chemistry was introduced in the ''[[The Sims 2: Nightlife]]'' expansion pack, and is present in all [[expansion pack]]s and stuff packs released after ''Nightlife''.
==Function==
Sims on community lots can scope crowds to find those special Sims. "Scope Room" is a self-interaction that must be selected by the player. When a Sim uses the "Scope Room" self-interaction, Sims that he or she could be attracted to will be surrounded by a white glow; in general, a stronger glow indicates stronger attraction. "Scope Room" will not be available when clicking on a Sim unless at the Sim could be attracted to at least one Sim in the room. While Sims will not scope a room autonomously, they may show autonomous attraction or repulsion reactions to other Sims. Players should note that these reactions, and the results of "Scope Room", are one-way. A controllable Sim can be directed to ask another Sim "Do You Like What You See?", which will elicit an attraction, repulsion, or neutral reaction depending on how attractive the Sim being asked finds the asking Sim. Players should note that, if the asking Sim has the trait the Sim being asked is repulsed by, they will react negatively to the asking Sim, even if that Sim also has a trait that turns them on.▼
▲
With the addition of chemistry, romantic relationships are easier or more difficult to form based on each Sim's chemistry. Love can still blossom under any circumstances with enough effort, but Sims with positive chemistry will have access to certain [[social interaction]]s earlier in the relationship (these interactions are marked with a lightning bolt in the menu) and makes all interactions between attracted Sims more likely to succeed. Interactions between two Sims with negative chemistry will fail more often.
▲Sims on community lots can scope crowds to find those special Sims. "Scope Room" is a self-interaction that must be selected by the player. When a Sim uses the "Scope Room" self-interaction, Sims that he or she could be attracted to will be surrounded by a white glow; in general, a stronger glow indicates stronger attraction. "Scope Room" will not be available when clicking on a Sim unless at the Sim could be attracted to at least one Sim in the room. While Sims will not scope a room autonomously, they may show autonomous attraction or repulsion reactions to other Sims. Players should note that these reactions, and the results of "Scope Room", are one-way. A controllable Sim can be directed to ask another Sim "Do You Like What You See?", which will elicit an attraction, repulsion, or neutral reaction depending on how attractive the Sim being asked finds the asking Sim. Players should note that, if the asking Sim has the trait the Sim being asked is repulsed by, they will react negatively to the asking Sim, even if that Sim also has a trait that turns them on. The Player could also direct their playable Sim to "Check Sim Out" on another sim, to discover whether the playable Sim likes them or not.
Family members who have strong chemistry with one another will want to be near one another. This can cause results such as a Sim overlooking a nearby kitchen sink in order to wash dishes in the bathroom, because a Sim they have chemistry with is in the bathroom. A common result of chemistry between two Sims in the same room is that a Sim told to do something such as study from a bookcase or read a newspaper will tend to pass up a nearby seat in order to sit near the other Sim.
It is not possible to select chemistry based on [[gender]], [[Life stages|age]], or skin color. However, it is possible to indirectly select chemistry for gender by making the Sim like or dislike make-up and/or beards, and Sims can be made to dislike/like elder Sims by selecting
Each teen, adult and elder Sim has two turn-ons and one turn-off. Turn-ons and turn-offs are designed to make relationships easier (or harder) to achieve. For [[Townie#The Sims 2|townies]] and Sims made before ''[[Nightlife]]'' these are chosen at random. So these Sims are not locked into these random choices, they will usually receive a potion called the [[ReNuYu Porta-Chug]], which allows the Sim to change their turn-ons and turn-off. Turn-ons and turn-offs can also be changed by using the [[ReNuYuSenso Orb]], which is an [[Aspiration reward (The Sims 2)|aspiration reward]]. If ''[[University]]'' is installed, [[College (sub-neighborhood)|college]] Sims can change their turn-ons and turn-off, as well as their [[Aspiration (The Sims 2)|aspiration]], when they finish their Sophomore year. A Sim's turn-ons and turn-off can also be changed with [[Package editor#SimPE|SimPE]]. If changes to a Sim's turn-ons, turn-off, or aspiration would affect his or her chemistry with another Sim, the changes may not appear until the next time the two meet face-to-face.▼
▲Each teen, adult and elder Sim has two turn-ons and one turn-off. Turn-ons and turn-offs are designed to make relationships easier (or harder) to achieve. For [[Townie#The Sims 2|townies]] and Sims made before ''[[Nightlife]]'' these are chosen at random. So these Sims are not locked into these random choices, they will usually receive a potion called the [[ReNuYu Porta-Chug]], which allows the Sim to change their turn-ons and turn-off. Turn-ons and turn-offs can also be changed by using the [[ReNuYuSenso Orb]], which is an [[Aspiration reward (The Sims 2)|aspiration reward]]. If ''[[University]]'' is installed, [[college]] Sims can change their turn-ons and turn-off, as well as their [[Aspiration (The Sims 2)|aspiration]], when they finish their Sophomore year. A Sim's turn-ons and turn-off can also be changed with [[Package editor#SimPE|SimPE]]. If changes to a Sim's turn-ons, turn-off, or aspiration would affect his or her chemistry with another Sim, the changes may not appear until the next time the two meet face-to-face.
{{Anchor|List of Turn-on/offs}}
{{All
|name = Turn offs and turn ons
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|caption = A full selection, with BV, FT or AL }}
;Hair
:Black, Blond, Brown, Red,
;Clothing
:Swim Wear, Underwear, Formal Wear
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:Unemployed, Hard Worker
*"Hard Worker" comes into effect if a Sim is at level 6 or higher in his or her [[Career tracks|career track]].
*The "Good at Skill" turn-ons/turn-offs come into effect if a Sim's level in that skill is higher than 5.0, even if it has not yet reached 6. Using SimPE to examine Sims with skill levels between 5.0 and 6 shows that the chemistry trait for a skill is set when the skill level passes 5.0.
*[[Elder]] Sims will
*When editing turn-ons and turn-offs with SimPE, it is up to the player to make sure that only two turn-ons and one turn-off are chosen. SimPE will allow fewer, or more, to be selected, but this should not be done.
*Sims will accept interactions from Sims with a medium or high chemistry, at a lower relationship level, than from Sims with a weaker chemistry. For example, they may accept hugs from a Sim with a stronger chemistry, even if the two have barely met.
[[fr:Chimie]]▼
{{Anchor|Calculating Chemistry}}
▲==Calculating Chemistry==
▲Turn-ons and Turn-offs are not the only contributors to Sim chemistry. Chemistry is determined based on the attraction score between two Sims. This attraction score is calculated from each Sim's [[zodiac]], primary [[Aspiration (The Sims 2)|aspiration]], current [[personality]] (not genetic), turn-ons, turn-offs, and any additional effects that affect attraction.<ref>{{Wayback|url=http://thesims2.ea.com/help/detail.php?help_id=177|title=TheSims2.com - Help - Detail|date=20090221124229}}</ref> All of these factors are added up to produce the attraction score and averaged to find the chemistry. Thus, one Sim may be more attracted to the other, yet both would have the same chemistry score. The actual calculations for these scores are slightly complicated, but easy to understand.<ref>[http://cyjon.net/node/86 A Study of Chemistry in The Sims 2]. Cyjon's Sims 2 Mods 'n' Stuff.</ref>
{|cellpadding="5"
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|- valign="top"
|17.5
|align="left"|[[
|- valign="top"
|0
|align="left"|[[Romance]]-[[
|- valign="top"
|−17.5
|align="left"|[[Romance]]-[[Knowledge]], [[Romance]]-[[Grilled Cheese]], [[
|- valign="top"
|−35
|align="left"|[[Romance]]-[[Family (aspiration)|Family]], [[
|}
According to [http://cyjon.net/ Cyjon], some of these aspirations have a one-sided attraction, but he averaged them when he created his charts since he didn't find any real effect on the game.
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|}
===Turn
Turn-ons and turn-offs are the part of chemistry that will easily distinguish which traits Sims like and don't like. Each trait that matches Sims' turn-ons adds a +17.5 to the attraction score and -22.5 for a matching turn-off.
====Notes====
*Wearing glasses or jewelry will set the Lycanthropy trait.
*[[Servo]]s are set with random hair color.
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*Having a stubble or beard will not set glasses, jewelry, makeup, and full-face makeup by changing appearance in mirror. It can be set by removing the facial hair, changing any of the four appearances, and then setting the facial hair again.
*[[PlantSim]]s and [[Witch]]es will always have full-face makeup set.
Some of the expanded turn-ons and turn-offs have been fixed by Tunaisafish's [http://www.modthesims.info/download.php?t=318327 Attraction Traits Fix].▼
▲Some of the expanded turn-ons and turn-offs have been fixed by Tunaisafish's [
===Other Influences===▼
With ''[[FreeTime]]'', Sims can wish for Beauty from the [[Genie#The Sims 2|genie]], which sets the attraction score to a flat +100 for all relationships he or she has with other Sims. This modification is actually set first and, if true, the rest of the calculations and effects are skipped. This means that if a Sim who had an active wish for Beauty took a love potion, the love potion would be nulled until the Beauty wore off, resulting in a wasted love potion.
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{{Feat art|January 2014}}
▲[[fr:Chimie]]
[[ru:Вкусы (The Sims 2)]]
[[Category:Nightlife]]
[[Category:Simology]]
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