Help:Patching the motorcycle area checks: Difference between revisions
Help:Patching the motorcycle area checks (view source)
Revision as of 18:31, 25 September 2018
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* On Wii U, the checks are implemented in the exact same way (which makes sense since it's the same codebase), but only a single instruction has to be patched because the Wii U compiler is not quite as good at inlining functions. Simply patch the instruction at <code>0x02A32A30</code> to <code>li r3, 1</code>. | * On Wii U, the checks are implemented in the exact same way (which makes sense since it's the same codebase), but only a single instruction has to be patched because the Wii U compiler is not quite as good at inlining functions. Simply patch the instruction at <code>0x02A32A30</code> to <code>li r3, 1</code>. | ||
== Disappearing when entering a blacklisted climate == | == Technical details == | ||
=== Disappearing when entering a blacklisted climate === | |||
Called from the Motorcycle AI root code. | Called from the Motorcycle AI root code. | ||
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<pre>.text:0000007100679D84 MOV W0, #1</pre> | <pre>.text:0000007100679D84 MOV W0, #1</pre> | ||
== Rune UI/sound effect == | === Rune UI/sound effect === | ||
Same climate based check as above, but done in a different RideMgr function. Just change: | Same climate based check as above, but done in a different RideMgr function. Just change: | ||
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<pre>.text:0000007100679650 B loc_710067965C</pre> | <pre>.text:0000007100679650 B loc_710067965C</pre> | ||
== Refusing to spawn when in a blacklisted climate == | === Refusing to spawn when in a blacklisted climate === | ||
=== Check 1 === | ==== Check 1 ==== | ||
Deep in some RideMgr function, called from the PlayerNormal AI: | Deep in some RideMgr function, called from the PlayerNormal AI: | ||
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so that the game always executes the code inside of the if block. | so that the game always executes the code inside of the if block. | ||
=== Check 2 === | ==== Check 2 ==== | ||
Found in another RideMgr member function and also called from the PlayerNormal AI code. | Found in another RideMgr member function and also called from the PlayerNormal AI code. | ||
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to make the game always return “true”. | to make the game always return “true”. | ||
== Disappearing when being away from the motorcycle == | === Disappearing when being away from the motorcycle === | ||
This is checked by Motorcycle AI root code (at 0x71004ADF28). | This is checked by Motorcycle AI root code (at 0x71004ADF28). | ||
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It is easy to change this condition to be always false. | It is easy to change this condition to be always false. | ||
== Other checks == | === Other checks === | ||
There are a few more conditions for spawning the motorcycle<ref>0x7100678E80 in Switch 1.5.0</ref>; however patching them is not recommended as they are implemented for good reasons. | There are a few more conditions for spawning the motorcycle<ref>0x7100678E80 in Switch 1.5.0</ref>; however patching them is not recommended as they are implemented for good reasons. | ||
=== Actor check === | ==== Actor check ==== | ||
If the actor cannot be loaded, the game will not allow the player to use the motorcycle and will show the regular “You can’t use that here” message. | If the actor cannot be loaded, the game will not allow the player to use the motorcycle and will show the regular “You can’t use that here” message. | ||
=== 6 or 7 other checks === | ==== 6 or 7 other checks ==== | ||
The RideMgr function at 0x7100678E80 (which can be identified with a xref to "GameROMMotorcycle") calls 6 member functions that must all return true; otherwise, the motorcycle cannot be used. | The RideMgr function at 0x7100678E80 (which can be identified with a xref to "GameROMMotorcycle") calls 6 member functions that must all return true; otherwise, the motorcycle cannot be used. | ||