~~NOTOC~~

====== SXJoypad ======

---- dataentry extension ----
type          : extension #or 'mod' if it requires changing the Sparrow source
author_mail   : pixelrevision@gmail.com Malcolm
description   : A simple joypad for use with sparrow
lastupdate_dt : 2011-04-11 #the date you created the extension
compatible    : v1.1 #the Sparrow version you tested the extension with
depends       :  #if the ext. depends on others, list them here
tags          : Joypad, controller, movement #enter a few tags, separated by commas
homepage_url  : https://gist.github.com/914079 #if the ext. has an URL (e.g. a Gist-page), add it here
download_url  : https://gist.github.com/gists/914079/download #a direct link to the download (e.g. the Gist-archive)
----

===== Usage =====

This is a simple joypad implementation for sparrow to be able to just pop on the stage and move things around.  You can use directional input, the angle from the center, or a projection that is based on the width of the image.  If your image is not centered, you can offset centerPoint to make input closer to what you want.

<code objc>
#import <Foundation/Foundation.h>
#import "SXJoypad.h"

@interface SparrowJoypad : SPStage{
	SXJoypad *joypad;
	SPQuad *quad;
}

@end


@implementation SparrowJoypad

- (id)initWithWidth:(float)width height:(float)height {
    self = [super initWithWidth:width height:height];
	joypad = [SXJoypad joypadWithContentsOfFile:@"joypad.png"];
	[self addChild:joypad];
	
	quad = [SPQuad quadWithWidth:16 height:16 color:0xFF0000];
	[self addChild:quad];
	
	// [self addEventListener:@selector(updateJoypadWithDirection:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
	[self addEventListener:@selector(updateJoypadWithAngle:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
    return self;
}

- (void)updateJoypadWithDirection:(SPEnterFrameEvent*)event{
	// state version
	float speed = 1;
	if(joypad.verticalDirection == kSXJoypadVerticleDirectionTop){
		quad.y -= speed;
	}else if(joypad.verticalDirection == kSXJoypadVerticleDirectionBottom){
		quad.y += speed;
	}
	if(joypad.horizontalDirection == kSXJoypadHorizontalDirectionLeft){
		quad.x -= speed;
	}else if(joypad.horizontalDirection == kSXJoypadHorizontalDirectionRight){
		quad.x += speed;
	}
}

- (void)updateJoypadWithAngle:(SPEnterFrameEvent*)event{
	// somewhat analog
	float speed = 1;
	if(joypad.recievingInput){
		quad.x += cos(joypad.angle) * speed;
		quad.y += sin(joypad.angle) * speed;
	}
}
@end
</code>



===== Changelog =====

  * //2011/04/11 21:01//: First public version

===== Source Code =====
%gist(914079)%

===== Discussion =====

Whoop, should have looked closed before adding.  Also see Shilo's [[users:shilo:extensions:shthumbstick|shthumbstick]]