Difference between revisions of "HPL3/Scripting/Scripting Guide/Sequences"
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| − | Many of the events that happen | + | Many of the events that happen inside map script files are triggered sequences. For example: A sound plays, then the player's FoV changes, then a light starts flashing, etc. |
We control all of those through a set of wrappers we call Sequences, which hide a bunch of timers away and make things easier to read. | We control all of those through a set of wrappers we call Sequences, which hide a bunch of timers away and make things easier to read. | ||
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For each sequence you need a map property to store the state - a cSequenceStatesData property e.g. | For each sequence you need a map property to store the state - a cSequenceStatesData property e.g. | ||
| − | + | <pre>cSequenceStatesData mSequenceAlert;</pre> | |
Then you create a sequence function. This will be repeatedly called until the whole sequence is over. It looks something like this: | Then you create a sequence function. This will be repeatedly called until the whole sequence is over. It looks something like this: | ||
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*shows sequence example* | *shows sequence example* | ||
| − | As you can see, Sequence_DoStepAndPause() in there actually pauses the whole sequence until some external event - in this case the callback from the voice playing code - calls SequenceStates_Resume() and asks it to continue. | + | As you can see, <code>Sequence_DoStepAndPause()</code> in there actually pauses the whole sequence until some external event - in this case the callback from the voice playing code - calls <code>SequenceStates_Resume()</code> and asks it to continue. |
| − | To start the sequence, you just call the sequence function once with an empty argument when you want it to trigger | + | To start the sequence, you just call the sequence function once with an empty argument when you want it to trigger: |
| + | |||
| + | Sequence_Alert(""); | ||
No need to call it every frame or anything! Once started, timers will automatically make sure that the sequence steps get followed when they need to be. | No need to call it every frame or anything! Once started, timers will automatically make sure that the sequence steps get followed when they need to be. | ||
| − | Since sequences are totally independent of each other, you could run | + | {{tip|Since sequences are totally independent of each other, you could run multiple sequences in parallel.}} |
| + | |||
| + | == See Also == | ||
| + | * [[HPL3/Scripting/Sequences_Helper|Sequences Helper]] | ||
Revision as of 15:49, 12 August 2020
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Many of the events that happen inside map script files are triggered sequences. For example: A sound plays, then the player's FoV changes, then a light starts flashing, etc.
We control all of those through a set of wrappers we call Sequences, which hide a bunch of timers away and make things easier to read.
They are very useful when we need to handle a big amount of timers that should occur one after another - or in other words - a sequence.
For each sequence you need a map property to store the state - a cSequenceStatesData property e.g.
cSequenceStatesData mSequenceAlert;
Then you create a sequence function. This will be repeatedly called until the whole sequence is over. It looks something like this:
- shows sequence example*
As you can see, Sequence_DoStepAndPause() in there actually pauses the whole sequence until some external event - in this case the callback from the voice playing code - calls SequenceStates_Resume() and asks it to continue.
To start the sequence, you just call the sequence function once with an empty argument when you want it to trigger:
Sequence_Alert("");
No need to call it every frame or anything! Once started, timers will automatically make sure that the sequence steps get followed when they need to be.
Tip: Since sequences are totally independent of each other, you could run multiple sequences in parallel.See Also