Advanced SCI Tutorials - Jumping Bug - Revision history

Andrew Branscom: /* Related Links */

2025-04-29T18:25:10Z

Andrew Branscom: /* Related Links */

2025-04-29T18:24:41Z

Andrew Branscom at 18:24, 29 April 2025

2025-04-29T18:24:13Z

← Older revision		Revision as of 14:24, 29 April 2025
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	=Chapter 5 - Jumping=		[[Category:SCI Pages]]
			[[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 4 - Jumping</span><br />''By [[]]''</div>

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

	if you've ever tried using the '''JumpTo''' class, you may have found it doesn't work very well. This is because there are bugs in the template game that comes with SCI Studio. Using Brian's disassembler, I looked at the Space Quest 3 scripts to see what the code was really supposed to do. With these fixes, you can make the ego jump to a particular screen location.		if you've ever tried using the '''JumpTo''' class, you may have found it doesn't work very well. This is because there are bugs in the template game that comes with SCI Studio. Using Brian's disassembler, I looked at the Space Quest 3 scripts to see what the code was really supposed to do. With these fixes, you can make the ego jump to a particular screen location.

	==Fixing Jump.sc==		==<br /> Fixing Jump.sc ==

	Open the '''Jump.sc''' script, and make the following changes.		Open the '''Jump.sc''' script, and make the following changes.
Line 97:		Line 104:

	*		*

	<span style="float: left">[[Advanced SCI Tutorials - Loopers\|< Previous: Chapter 4 - Loopers]]</span>		<span style="float: left">[[Advanced SCI Tutorials - Loopers\|< Previous: Chapter 4 - Loopers]]</span>
	<span style="float: right">[[Advanced SCI Tutorials - The z-coordinate\|Next: Chapter 6 - The z-coordinate >]]</span>		<span style="float: right">[[Advanced SCI Tutorials - The z-coordinate\|Next: Chapter 6 - The z-coordinate >]]</span>

Andrew Branscom: /* Related Links */

2025-04-28T17:43:15Z

Andrew Branscom: Andrew Branscom moved page Jumping Bug to Advanced SCI Tutorials - Jumping Bug

2025-04-28T17:23:41Z

Andrew Branscom moved page Jumping Bug to Advanced SCI Tutorials - Jumping Bug

← Older revision	Revision as of 13:23, 28 April 2025
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Andrew Branscom: 4 revisions imported

2025-02-16T20:40:24Z

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Andrew Branscom at 15:28, 5 December 2024

2024-12-05T15:28:15Z

← Older revision		Revision as of 11:28, 5 December 2024
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	<syntaxhighlight lang="sci" class="cs">// Make the ego jump to 100,100		<syntaxhighlight lang="sci" class="cs">// Make the ego jump to 100,100
	(send gEgo:setMotion(JumpTo 100 100))</syntaxhighlight>		(send gEgo:setMotion(JumpTo 100 100))</syntaxhighlight>
			</blockquote>

	==<br /> References ==		==<br /> References ==

Andrew Branscom at 15:27, 5 December 2024

2024-12-05T15:27:34Z

← Older revision		Revision as of 11:27, 5 December 2024
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	(send gEgo:setMotion(JumpTo 100 100))</syntaxhighlight>		(send gEgo:setMotion(JumpTo 100 100))</syntaxhighlight>

			==<br /> References ==

			<references />

			==<br /> Related Links ==

			*

	<span style="float: left">[[Loopers\|< Previous: Chapter 4 - Loopers]]</span>		<span style="float: left">[[Loopers\|< Previous: Chapter 4 - Loopers]]</span>
	<span style="float: right">[[The z-coordinate\|Next: Chapter 6 - The z-coordinate >]]</span>		<span style="float: right">[[The z-coordinate\|Next: Chapter 6 - The z-coordinate >]]</span>



	[[Category:Bugs]]		[[Category:Bugs]]
	[[Category:Troubleshooting]]		[[Category:Troubleshooting]]
	[[Category:Tutorials]]		[[Category:Tutorials]]

Andrew Branscom: 1 revision imported

2024-06-03T05:07:14Z

1 revision imported

← Older revision	Revision as of 01:07, 3 June 2024
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sierraw>Andrew Branscom: Created page with "=Chapter 5 - Jumping= if you've ever tried using the '''JumpTo''' class, you may have found it doesn't work very well. This is because there are bugs in the template game tha..."

2021-05-13T21:07:40Z

Created page with "=Chapter 5 - Jumping= if you've ever tried using the '''JumpTo''' class, you may have found it doesn't work very well. This is because there are bugs in the template game tha..."

New page

=Chapter 5 - Jumping=

if you've ever tried using the '''JumpTo''' class, you may have found it doesn't work very well. This is because there are bugs in the template game that comes with SCI Studio. Using Brian's disassembler, I looked at the Space Quest 3 scripts to see what the code was really supposed to do. With these fixes, you can make the ego jump to a particular screen location.

==Fixing Jump.sc==

Open the '''Jump.sc''' script, and make the following changes.

<blockquote>
Replace the '''setTest''' method with this:
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci" class="cs"> (method (setTest)
(if (> (send client:x) x)
(= dx -1)
)(else
(if (<> x (send client:x))
(= dx 1)
)(else
(if (> xStep 0)
(= dx -1)
)(else
(= dx 1)
)
)
)
(if (> (send client:y) y)
(= dy -1)
)(else
(if (<> y (send client:y))
(= dy 1)
)(else
(if (> yStep 0)
(= dy -1)
)(else
(= dy 1)
)
)
)
)</syntaxhighlight>
</blockquote>

Then go to the '''doit''' method. There is an 'x' where there should be a 'y'. Replace this code:

<blockquote>
Old code:
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci" class="cs">(send client:
x(+ xLast xStep)
x(+ yLast yStep)
)</syntaxhighlight>
</blockquote>

With this:

<blockquote>
Fixed code:
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci" class="cs">(send client:
x(+ xLast xStep)
y(+ yLast yStep)
)</syntaxhighlight>
</blockquote>

Finally, the '''moveDone''' method of the '''Jump''' class is missing a '''(self:motionCue())'''. It should look like this:

<blockquote>
Fixed code:
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci" class="cs">(method (moveDone)
(send client:
illegalBits(illegalBits)
signal(signal)
)
= completed TRUE
(if(caller)
= gCastMotionCue TRUE
)(else
(self:motionCue())
)
)</syntaxhighlight>
</blockquote>

With these changes, jumping should work properly. Just add (use 'Jump')to the top of your script, and then use the '''JumpTo''' class:

<blockquote>
Example:
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci" class="cs">// Make the ego jump to 100,100
(send gEgo:setMotion(JumpTo 100 100))</syntaxhighlight>

 

<span style="float: left">[[Loopers|< Previous: Chapter 4 - Loopers]]</span>
<span style="float: right">[[The z-coordinate|Next: Chapter 6 - The z-coordinate >]]</span>

 

[[Category:Bugs]]
[[Category:Troubleshooting]]
[[Category:Tutorials]]

← Older revision		Revision as of 14:25, 29 April 2025
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	<span style="float: right">[[Advanced SCI Tutorials - The z-coordinate\|Next: Chapter 5 - The z-coordinate >]]</span>		<span style="float: right">[[Advanced SCI Tutorials - The z-coordinate\|Next: Chapter 5 - The z-coordinate >]]</span>

			[[Category:Troubleshooting]]
			[[Category:SCI Troubleshooting]]
	[[Category:Bugs]]		[[Category:Bugs]]
	[[Category:~~Troubleshooting~~]]		[[Category:SCI Bugs]]
	[[Category:Tutorials]]		[[Category:Tutorials]]
			[[Category:SCI Tutorials]]

← Older revision		Revision as of 14:24, 29 April 2025
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	*		*

	<span style="float: left">[[Advanced SCI Tutorials - Loopers\|< Previous: Chapter 4 - Loopers]]</span>		<span style="float: left">[[Advanced SCI Tutorials - Loopers\|< Previous: Chapter 3 - Loopers]]</span>
	<span style="float: right">[[Advanced SCI Tutorials - The z-coordinate\|Next: Chapter 6 - The z-coordinate >]]</span>		<span style="float: right">[[Advanced SCI Tutorials - The z-coordinate\|Next: Chapter 5 - The z-coordinate >]]</span>

	[[Category:Bugs]]		[[Category:Bugs]]
	[[Category:Troubleshooting]]		[[Category:Troubleshooting]]
	[[Category:Tutorials]]		[[Category:Tutorials]]

← Older revision		Revision as of 13:43, 28 April 2025
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	*		*

	<span style="float: left">[[Loopers\|< Previous: Chapter 4 - Loopers]]</span>		<span style="float: left">[[Advanced SCI Tutorials - Loopers\|< Previous: Chapter 4 - Loopers]]</span>
	<span style="float: right">[[The z-coordinate\|Next: Chapter 6 - The z-coordinate >]]</span>		<span style="float: right">[[Advanced SCI Tutorials - The z-coordinate\|Next: Chapter 6 - The z-coordinate >]]</span>

	[[Category:Bugs]]		[[Category:Bugs]]
	[[Category:Troubleshooting]]		[[Category:Troubleshooting]]
	[[Category:Tutorials]]		[[Category:Tutorials]]