Andrew Branscom: 1 revision

2013-08-05T20:19:59Z

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Andrew Branscom at 08:39, 5 August 2013

2013-08-05T08:39:20Z

Andrew Branscom: Created page with "= Chapter 3 - Making Actors Move Along Paths =
''*Requires SCI Studio 2.11 or higher.''
Most likely in your game you will need to h..."

2013-08-05T08:35:42Z

Created page with "= Chapter 3 - Making Actors Move Along Paths = <div align="right">''<nowiki>*Requires SCI Studio 2.11 or higher.</nowiki>''</div> Most likely in your game you will need to h..."

Andrew Branscom at 23:30, 5 January 2011

2011-01-05T23:30:33Z

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= Chapter 3 - Making Actors Move Along Paths =

<div align="right">''<nowiki>*Requires SCI Studio 2.11 or higher.</nowiki>''</div>

Most likely in your game you will need to have actors moving. This is simply done by setting the actor's motion.

== Getting Started ==

{| width="100%"
|
Open your game in the resource explorer and select "Resource"->"Add Sample"->"View"->"Brian" from the menu.

Save it to your game as view.001.
|-
| width="32" | [[Image:View-ActorAdd.png|View]]
|}

We'll begin with the basics by editing a view.

{| width="100%"
| width="127" | [[Image:Script-rm001.png|Rm001 Script]]
| You can obviously use this in any script, but for demonstration purposes, open up the game's "rm001.sc" script.
|}

Since the ego is an actor, everything in this lesson can be applied to it as well. However, to keep things simple, we will create another actor. Scroll down to the end of the script and add the following lines of code:

<blockquote>
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci">(instance aMan of Act
(properties
y 170
x 190
view 1
)
)</syntaxhighlight>

This simply creates an actor which uses view.001 and positions it at (190,170).
</blockquote>

{| width="100%"
| [[Image:Script-GameInstance.png|Game Instance]]
| width="100%" valign="top" | Next, go to the game's instance, then scroll down to the bottom of the init method.
|}

Set up the actor with the following lines of code:

<blockquote>
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci">(aMan:
init()
setCycle(Walk)
)</syntaxhighlight>

This simply initializes the actor, then sets it's cycle to '''Walk'''. If the cycle wasn't set, it would just drag across the screen. It's now ready for it's movement to be set up.
</blockquote>

==Simple Actor Movement==

Setting up an actor to move from it's current position to another is very simple. All you need to do it call it's '''setMotion()''' method, and set it's motion to '''MoveTo'''. This method takes three additional parameters: the '''X''' coordinate, the '''Y''' coordinate, and the '''room script'''. The X is of course, the amount of pixels from the left of the screen the actor will be positioned, and the Y being the amount of pixels from the top. The room script is used to trigger an event. Just set it to the current room script.

To implement it, you can simply adjust the initialization of the actor and add a MoveTo setMotion:

<blockquote>
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci">(aMan:
init()
setCycle(Walk)
setMotion(MoveTo 180 150 RoomScript)
)</syntaxhighlight>

The actor is now set to move to the coordinates (180,150).
</blockquote>

That's all there is to it!

==Moving Actors Along Paths==

Moving actors along paths requires the DPath motion. You simply call the '''setMotion''' method and set the motion to '''DPath'''. It takes an unlimited amount of parameters. You just add the X,Y coordinates which is should move.

To implement it, you can simply adjust the initialization of the actor and add a MoveTo setMotion:

<blockquote>
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci">(aMan:
init()
setCycle(Walk)
setMotion(
DPath
180 150
240 100
280 160
180 150
)
)</syntaxhighlight>

This sets up the actor to move to (180,150), then up to (240,100), then down to (280,160), then back to it's starting position, (180,150).
</blockquote>

Compile and run and you'll see the actor move just like that!

==Setting An Actor's Motion Anywhere==

In the preceding examples, the actor's motion was set in the init() method. However, it can be called from anywhere in the script.

Here's an example of using it anywhere:

<blockquote>
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="sci">(aMan:setMotion(MoveTo 180 150 RoomScript))</syntaxhighlight>
</blockquote>

That sums up actor movement! For more complex movement, have a look at the chapter [chapter04.html Moving Actors and Triggering Events.]

Congratulations! You now know how to edit view resources.
 

<span style="float: left">[[WordFail, syntaxFail and pragmaFail|< Previous: Chapter 2 - Oh, yeah? Well, "%s" this!]]</span>
<span style="float: right">[[Actor Event Triggers|Next: Chapter 4 - Moving Actors and Triggering Events >]]</span>

 

[[Category:Paths]]
[[Category:Actors]]
[[Category:Tutorials]]

@@ Line 27: / Line 27: @@
 <blockquote>
 <div class="CodeBlockHeader">Code:</div>
-<syntaxhighlight lang="sci">(instance aMan of Act
+<syntaxhighlight lang="sci" class="cs">(instance aMan of Act
    (properties
      y 170
@@ Line 47: / Line 47: @@
 <blockquote>
 <div class="CodeBlockHeader">Code:</div>
-<syntaxhighlight lang="sci">(aMan:
+<syntaxhighlight lang="sci" class="cs">(aMan:
    init()
    setCycle(Walk)
@@ Line 63: / Line 63: @@
 <blockquote>
 <div class="CodeBlockHeader">Code:</div>
-<syntaxhighlight lang="sci">(aMan:
+<syntaxhighlight lang="sci" class="cs">(aMan:
    init()
    setCycle(Walk)
@@ Line 82: / Line 82: @@
 <blockquote>
 <div class="CodeBlockHeader">Code:</div>
-<syntaxhighlight lang="sci">(aMan:
+<syntaxhighlight lang="sci" class="cs">(aMan:
    init()
    setCycle(Walk)
@@ Line 107: / Line 107: @@
 <blockquote>
 <div class="CodeBlockHeader">Code:</div>
-<syntaxhighlight lang="sci">(aMan:setMotion(MoveTo 180 150 RoomScript))</syntaxhighlight>
+<syntaxhighlight lang="sci" class="cs">(aMan:setMotion(MoveTo 180 150 RoomScript))</syntaxhighlight>
 </blockquote>

Actor Paths - Revision history

Andrew Branscom: 1 revision

Andrew Branscom at 08:39, 5 August 2013

Andrew Branscom: Created page with "= Chapter 3 - Making Actors Move Along Paths = ''*Requires SCI Studio 2.11 or higher.'' Most likely in your game you will need to h..."

Andrew Branscom at 23:30, 5 January 2011

Andrew Branscom: Created page with "= Chapter 3 - Making Actors Move Along Paths =
''*Requires SCI Studio 2.11 or higher.''
Most likely in your game you will need to h..."