/*

     File: Helicopter.m

 Abstract: One of the interesting subclasses of GamePiece, implementing the helicopter

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#import "Helicopter.h"

#import "Bullet.h"

#import "HelicopterExplosion.h"

#import "Game.h"

@implementation Helicopter

- (NSInteger)pieceType {

    return FriendlyPiece;

}

- (id)initInGame:(Game *)g {

    if (!(self = [self initInGame:g imageName:@"helicopter" numFrames:4])) return nil;

    return self;

}

- (void)startFiring {

    fireRequested = YES;

}

- (void)stopFiring {

    if (fireRequested) {

    nextFireTime = [Game minInt:nextFireTime :[game updateTime] + TIMETORECHARGE / 4];

    fireRequested = NO;

    }

}

- (BOOL)fireRequested {

    return fireRequested;

}

- (void)setVelocity:(NSSize)newVelocity {

    NSSize newVel = NSMakeSize([Game maxFloat:0.0 :[Game minFloat:MAXVELX :newVelocity.width]], [Game restrictValue:newVelocity.height toPlusOrMinus:MAXVELY]);

    if ((newVel.height > 0.0 && vel.height > 0.0 && newVel.height < vel.height && newVel.height < ZEROVELTHRESHOLD) ||

    (newVel.height < 0.0 && vel.height < 0.0 && newVel.height > vel.height && newVel.height > -ZEROVELTHRESHOLD)) {

    newVel.height = 0.0;

    }

    if (newVel.width < vel.width && newVel.width < ZEROVELTHRESHOLD) {

        newVel.width = 0.0;

    }

    [super setVelocity:newVel];

}

- (void)setCommand:(NSInteger)cmd {

    command = cmd;

}

- (NSSize)acceleration {

    CGFloat dw = 0.0, dh = 0.0;

    switch (command) {

        case StopCommand:       dw = -7 * vel.width; dh = -7 * vel.height; break;

        case GoDownLeftCommand: dw = dh = -HELICOPTERACCVALUE; break;

        case GoDownCommand: dh = -HELICOPTERACCVALUE; break;

        case GoDownRightCommand:    dw = HELICOPTERACCVALUE; dh = -HELICOPTERACCVALUE; break;

        case GoLeftCommand: dw = -HELICOPTERACCVALUE; break;

        case GoRightCommand:    dw = HELICOPTERACCVALUE; break;

        case GoUpLeftCommand:   dw = -HELICOPTERACCVALUE; dh = HELICOPTERACCVALUE; break;

        case GoUpCommand:       dh = HELICOPTERACCVALUE; break;

        case GoUpRightCommand:  dw = HELICOPTERACCVALUE; dh = HELICOPTERACCVALUE; break;

        default:            break;

    }

    return NSMakeSize(acc.width + dw, acc.height + dh);

}

- (void)updatePiece {

    if ([self fireRequested] && [game updateTime] > nextFireTime) {

        GamePiece *bullet = [[Bullet alloc] initInGame:game];

        [game playFriendlyFireSound];

        [bullet setVelocity:NSMakeSize(vel.width + BULLETVEL, vel.height)];

        [bullet setLocation:NSMakePoint(NSMaxX(pos) - 8, pos.origin.y)];

    [game addGamePiece:bullet];

    nextFireTime = [game updateTime] + TIMETORECHARGE;

    }

    [super updatePiece];

}

- (void)playExplosionSound {

    [game playLoudExplosionSound];

}

- (void)explode {

    GamePiece *explosion = [[HelicopterExplosion alloc] initInGame:game];

    [game setFocusObject:explosion];

    [self explode:explosion];

}

// Touch rects for the helicopter pointing right.

#define NUMHELICOPTERRECTS 5

static NSRect helicopterRects[NUMHELICOPTERRECTS] = {

    {{27, 0}, {18, 11}},    // Bottom

    {{0, 8}, {4, 11}},      // Tail

    {{0, 16}, {50, 1}},

    {{22, 5}, {18, 12}},    // Body

    {{0, 10}, {42, 3}}

};

- (BOOL)touches:(GamePiece *)obj {

    if (![super touches:obj]) return NO;    // Easy case 

    NSInteger cnt;

    for (cnt = 0; cnt < NUMHELICOPTERRECTS; cnt++) {

        NSRect rect = helicopterRects[cnt];

        if ([obj touchesRect:NSMakeRect(rect.origin.x + pos.origin.x, rect.origin.y + pos.origin.y, rect.size.width, rect.size.height)]) return YES;

    }

    return NO;

}

- (BOOL)touchesRect:(NSRect)r {

    if (![super touchesRect:r]) return NO;  // Easy case

    NSInteger cnt;

    for (cnt = 0; cnt < NUMHELICOPTERRECTS; cnt++) {

        NSRect rect = helicopterRects[cnt];

        if ([GamePiece intersectsRects:r :NSMakeRect(rect.origin.x + pos.origin.x, rect.origin.y + pos.origin.y, rect.size.width, rect.size.height)]) return YES;

    }

    return NO;

}

@end