Advanced SCI Tutorials - Loopers - Revision history

Andrew Branscom: /* Related Links */

2025-04-29T18:22:40Z

Andrew Branscom at 18:18, 29 April 2025

2025-04-29T18:18:52Z

← Older revision		Revision as of 13:18, 29 April 2025
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	[[Category:SCI Pages]]		[[Category:SCI Pages]]
	= Chapter 4 - Loopers =		[[Category:SCI Pages to be Edited]]
			[[SCI Tutorials and Guides\|SCI Tutorials and Guides Table of Contents]]

			<div align="center"><span style="font-size: 22pt">Chapter 3 - Loopers</span><br />''By [[]]''</div>

			<br />
			==<br /> Introduction ==

	The '''View''' class has a '''setLoop''' method that indicates which loop in the view should be used. The '''Act''' class extends this by allow you to specify an object than can control which loop is shown, based on the actor's heading.		The '''View''' class has a '''setLoop''' method that indicates which loop in the view should be used. The '''Act''' class extends this by allow you to specify an object than can control which loop is shown, based on the actor's heading.
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	To make a looper object, you can make an instance of the base class '''Obj''', and provide an '''init''' method that takes one parameter (the actor), and a '''doit''' method that takes 2 parameters (the actor, and its heading). The game will call the '''doit''' method only when the heading changes.		To make a looper object, you can make an instance of the base class '''Obj''', and provide an '''init''' method that takes one parameter (the actor), and a '''doit''' method that takes 2 parameters (the actor, and its heading). The game will call the '''doit''' method only when the heading changes.

	== Reversing the up and down loops ==		==<br /> Reversing the up and down loops ==

	For this exercise, we'll make a looper that switches the normal up and down loops used when an actor is moving around. Generally, loop 3 is used when the actor is heading 'up' (facing away), and loop 2 is used when he is heading 'down' (facing you). To make it so he faces away when he moves down, and faces you when he moves up, we could write the following looper:		For this exercise, we'll make a looper that switches the normal up and down loops used when an actor is moving around. Generally, loop 3 is used when the actor is heading 'up' (facing away), and loop 2 is used when he is heading 'down' (facing you). To make it so he faces away when he moves down, and faces you when he moves up, we could write the following looper:
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	*		*

	<span style="float: left">[[Advanced SCI Tutorials - Scripting Props and Acts\|< Previous: Chapter 3 - Scripting Props and Acts]]</span>		<span style="float: left">[[Advanced SCI Tutorials - Scripting Props and Acts\|< Previous: Chapter 2 - Scripting Props and Acts]]</span>
	<span style="float: right">[[Advanced SCI Tutorials - Jumping Bug\|Next: Chapter 5 - Jumping Bug >]]</span>		<span style="float: right">[[Advanced SCI Tutorials - Jumping Bug\|Next: Chapter 4 - Jumping Bug >]]</span>

	[[Category:Technical Info]]		[[Category:Technical Info]]
			[[Category:SCI Technical Info]]
	[[Category:Loopers]]		[[Category:Loopers]]
			[[Category:SCI Loopers]]
	[[Category:Tutorials]]		[[Category:Tutorials]]
	[[Category:SCI Tutorials]]		[[Category:SCI Tutorials]]

Andrew Branscom: /* Related Links */

2025-04-28T17:42:56Z

Andrew Branscom: Andrew Branscom moved page Loopers to Advanced SCI Tutorials - Loopers

2025-04-28T17:23:58Z

Andrew Branscom moved page Loopers to Advanced SCI Tutorials - Loopers

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Andrew Branscom at 15:24, 5 December 2024

2024-12-05T15:24:38Z

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			[[Category:SCI Pages]]
	= Chapter 4 - Loopers =		= Chapter 4 - Loopers =

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	Unfortunately, there is no way to 'remove' a looper and return to the default behavior, although it does get reset each time the actor is initialized (e.g. so in this case, it will be reset when the ego moves to the next room).		Unfortunately, there is no way to 'remove' a looper and return to the default behavior, although it does get reset each time the actor is initialized (e.g. so in this case, it will be reset when the ego moves to the next room).

			==<br /> References ==

			<references />

			==<br /> Related Links ==

			*

	<span style="float: left">[[Scripting Props and Acts\|< Previous: Chapter 3 - Scripting Props and Acts]]</span>		<span style="float: left">[[Scripting Props and Acts\|< Previous: Chapter 3 - Scripting Props and Acts]]</span>
	<span style="float: right">[[Jumping Bug\|Next: Chapter 5 - Jumping Bug >]]</span>		<span style="float: right">[[Jumping Bug\|Next: Chapter 5 - Jumping Bug >]]</span>


			[[Category:Technical Info]]
	[[Category:Loopers]]		[[Category:Loopers]]
	[[Category:Tutorials]]		[[Category:Tutorials]]
			[[Category:SCI Tutorials]]

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sierraw>Andrew Branscom: Created page with "= Chapter 4 - Loopers = The '''View''' class has a '''setLoop''' method that indicates which loop in the view should be used. The '''Act''' class extends this by allow you to..."

2021-05-13T21:08:26Z

Created page with "= Chapter 4 - Loopers = The '''View''' class has a '''setLoop''' method that indicates which loop in the view should be used. The '''Act''' class extends this by allow you to..."

New page

= Chapter 4 - Loopers =

The '''View''' class has a '''setLoop''' method that indicates which loop in the view should be used. The '''Act''' class extends this by allow you to specify an object than can control which loop is shown, based on the actor's heading.

To make a looper object, you can make an instance of the base class '''Obj''', and provide an '''init''' method that takes one parameter (the actor), and a '''doit''' method that takes 2 parameters (the actor, and its heading). The game will call the '''doit''' method only when the heading changes.

== Reversing the up and down loops ==

For this exercise, we'll make a looper that switches the normal up and down loops used when an actor is moving around. Generally, loop 3 is used when the actor is heading 'up' (facing away), and loop 2 is used when he is heading 'down' (facing you). To make it so he faces away when he moves down, and faces you when he moves up, we could write the following looper:

<blockquote>
Example:
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci" class="cs">(instance myLooper of Obj
(properties
)
(method (init client)
)
(method (doit client heading)
(if ((< heading 45) or (> heading 315))
(send client:loop(2))
)(else if ((>= heading 45) and (<= heading 135))
(send client:loop(0))
)(else if ((> heading 135) and (< heading 225))
(send client:loop(3))
)(else
(send client:loop(1))
)
)
)</syntaxhighlight>
</blockquote>

The looper needs to at least have those two methods, or it will crash.

And then, you need to apply the looper to the actor:

<blockquote>
Example:
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci" class="cs"> (send gEgo:setLoop(myLooper))</syntaxhighlight>
</blockquote>

Unfortunately, there is no way to 'remove' a looper and return to the default behavior, although it does get reset each time the actor is initialized (e.g. so in this case, it will be reset when the ego moves to the next room).

 

<span style="float: left">[[Scripting Props and Acts|< Previous: Chapter 3 - Scripting Props and Acts]]</span>
<span style="float: right">[[Jumping Bug|Next: Chapter 5 - Jumping Bug >]]</span>

 

[[Category:Loopers]]
[[Category:Tutorials]]

← Older revision		Revision as of 13:22, 29 April 2025
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	*		*

	<span style="float: left">[[Advanced SCI Tutorials - Scripting Props and Acts\|< Previous: Chapter 2 - Scripting Props and Acts]]</span>		<span style="float: left">[[Advanced SCI Tutorials - Scripting Props and Acts\|< Previous: Chapter 2 - Scripting Props and Acts]]</span>
	<span style="float: right">[[Advanced SCI Tutorials - Jumping Bug\|Next: Chapter 4 - Jumping Bug >]]</span>		<span style="float: right">[[Advanced SCI Tutorials - Jumping Bug\|Next: Chapter 4 - Jumping Bug >]]</span>

← Older revision		Revision as of 12:42, 28 April 2025
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	*		*

	<span style="float: left">[[Scripting Props and Acts\|< Previous: Chapter 3 - Scripting Props and Acts]]</span>		<span style="float: left">[[Advanced SCI Tutorials - Scripting Props and Acts\|< Previous: Chapter 3 - Scripting Props and Acts]]</span>
	<span style="float: right">[[Jumping Bug\|Next: Chapter 5 - Jumping Bug >]]</span>		<span style="float: right">[[Advanced SCI Tutorials - Jumping Bug\|Next: Chapter 5 - Jumping Bug >]]</span>

	[[Category:Technical Info]]		[[Category:Technical Info]]