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SXJoypad.h
#import <Foundation/Foundation.h>
#import "Sparrow.h"
#define SX_JOYPAD_EVENT_STARTED_INPUT @"startedInput"
#define SX_JOYPAD_EVENT_STOPPED_INPUT @"stoppedInput"
#define SX_JOYPAD_EVENT_UPDATED_INPUT @"updatedInput"
typedef enum{
kSXJoypadVerticleDirectionNone,
kSXJoypadVerticleDirectionTop,
kSXJoypadVerticleDirectionBottom
}SXJoypadVerticleDirection;
typedef enum{
kSXJoypadHorizontalDirectionNone,
kSXJoypadHorizontalDirectionLeft,
kSXJoypadHorizontalDirectionRight
}SXJoypadHorizontalDirection;
@interface SXJoypad : SPImage {
SPPoint *centerPoint;
BOOL watchingTouches;
SXJoypadVerticleDirection verticalDirection;
SXJoypadHorizontalDirection horizontalDirection;
double angle;
SPPoint *projection;
float projectionModifier;
BOOL recievingInput;
}
@property (nonatomic, retain) SPPoint *centerPoint;
@property (nonatomic, readonly) SXJoypadVerticleDirection verticalDirection;
@property (nonatomic, readonly) SXJoypadHorizontalDirection horizontalDirection;
@property (nonatomic, retain) SPPoint *projection;
@property (nonatomic, readonly) double angle;
@property (nonatomic, readonly) float projectionModifier;
@property (nonatomic, readonly) BOOL recievingInput;
- (id)initWithTexture:(SPTexture*)texture;
- (id)initWithContentsOfFile:(NSString*)path;
+ (SXJoypad*)joypadWithTexture:(SPTexture*)texture;
+ (SXJoypad*)joypadWithContentsOfFile:(NSString*)path;
- (void)reset;
- (void)touched:(SPTouchEvent*)touch;
- (void)calculateValuesWithPosition:(SPPoint*)pos;
@end
#import "SXJoypad.h"
@implementation SXJoypad
@synthesize centerPoint;
@synthesize verticalDirection;
@synthesize horizontalDirection;
@synthesize projection;
@synthesize angle;
@synthesize projectionModifier;
@synthesize recievingInput;
- (id)initWithTexture:(SPTexture*)texture{
self = [super initWithTexture:texture];
[self reset];
return self;
}
- (id)initWithContentsOfFile:(NSString*)path{
self = [super initWithContentsOfFile:path];
[self reset];
return self;
}
+ (SXJoypad*)joypadWithTexture:(SPTexture*)texture{
SXJoypad *jp = [[[SXJoypad alloc] initWithTexture:texture] autorelease];
return jp;
}
+ (SXJoypad*)joypadWithContentsOfFile:(NSString*)path{
SXJoypad *jp = [[[SXJoypad alloc] initWithContentsOfFile:path] autorelease];
return jp;
}
- (void)reset{
self.centerPoint = [SPPoint pointWithX:self.width/2 y:self.height/2];
self.projection = [SPPoint pointWithX:0 y:0];
projectionModifier = 1;
angle = 0;
if(!watchingTouches){
watchingTouches = YES;
[self addEventListener:@selector(touched:) atObject:self forType:SP_EVENT_TYPE_TOUCH];
}
centerPoint.x = self.width/2;
centerPoint.y = self.height/2;
}
- (void)touched:(SPTouchEvent*)event{
SPTouch *touchBegan = [[event touchesWithTarget:self andPhase:SPTouchPhaseBegan] anyObject];
if(touchBegan){
SPPoint *touchPosition = [touchBegan locationInSpace:self];
[self calculateValuesWithPosition:touchPosition];
recievingInput = YES;
[self dispatchEvent:[SPEvent eventWithType:SX_JOYPAD_EVENT_STARTED_INPUT]];
}
SPTouch *touchMoved = [[event touchesWithTarget:self andPhase:SPTouchPhaseMoved] anyObject];
if(touchMoved){
SPPoint *touchPosition = [touchMoved locationInSpace:self];
[self calculateValuesWithPosition:touchPosition];
recievingInput = YES;
[self dispatchEvent:[SPEvent eventWithType:SX_JOYPAD_EVENT_UPDATED_INPUT]];
}
SPTouch *touchEnded = [[event touchesWithTarget:self andPhase:SPTouchPhaseEnded] anyObject];
if(touchEnded){
horizontalDirection = kSXJoypadVerticleDirectionNone;
verticalDirection = kSXJoypadHorizontalDirectionNone;
projection.x = 0;
projection.y = 0;
recievingInput = NO;
[self dispatchEvent:[SPEvent eventWithType:SX_JOYPAD_EVENT_STOPPED_INPUT]];
}
}
- (void)calculateValuesWithPosition:(SPPoint*)pos{
// grab the angle
angle = atan2(pos.y - centerPoint.y, pos.x - centerPoint.x);
double angCheck = SP_R2D(angle);
while (angCheck > 360) {
angCheck -= 360;
}
while(angCheck < 0){
angCheck += 360;
}
// get some more static input
horizontalDirection = kSXJoypadVerticleDirectionNone;
verticalDirection = kSXJoypadHorizontalDirectionNone;
if(angCheck < 45 || angCheck > 315){
horizontalDirection = kSXJoypadHorizontalDirectionRight;
}else if(angCheck >= 45 && angCheck < 135){
verticalDirection = kSXJoypadVerticleDirectionBottom;
}else if (angCheck >= 135 && angCheck < 225){
horizontalDirection = kSXJoypadHorizontalDirectionLeft;
}else if(angCheck >= 225 && angCheck < 315){
verticalDirection = kSXJoypadVerticleDirectionTop;
}
// create a vector for projection
float dx = pos.x - centerPoint.x;
float dy = pos.y - centerPoint.y;
float distance = sqrt(dx*dx + dy*dy) * projectionModifier;
projection.x = cos(angle) * distance;
projection.y = sin(angle) * distance;
}
- (void)dealloc{
self.centerPoint = nil;
self.projection = nil;
if(watchingTouches){
watchingTouches = NO;
[self removeEventListener:@selector(touched:) atObject:self forType:SP_EVENT_TYPE_TOUCH];
}
[super dealloc];
}
@end
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