/*

 Copyright (C) 2018 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Exposes game controller action button type functionality with screen-rendered buttons.

 */

#import "AAPLControlOverlay.h"

#define PadBottomMargin 40.0

#define PadLeftMargin 20.0

#define PadRightMargin 20.0

#define ButtonMarginFromPad 0.0

#define ButtonAPositionAngleDegree 155.0f

#define ButtonBPositionAngleDegree 110.0f

#define ToRadian(x) (x) * M_PI / 180.f

@implementation AAPLControlOverlay

- (instancetype)initWithFrame:(CGRect)frame {

    if (self = [super init]) {

        _leftPad = [[AAPLPadOverlay alloc] init];

        _leftPad.position = CGPointMake(PadLeftMargin, PadBottomMargin);

        [self addChild:_leftPad];

        _rightPad = [[AAPLPadOverlay alloc] init];

        _rightPad.position = CGPointMake(

            frame.size.width - PadRightMargin - _rightPad.size.width, PadBottomMargin);

        [self addChild:_rightPad];

        _buttonA = [[AAPLButtonOverlay alloc] initWithText:@"A"];

        _buttonB = [[AAPLButtonOverlay alloc] initWithText:@"B"];

        const float buttonDistance =

            _rightPad.size.height / 2.0f + _rightPad.stickSize.width / 2.0f + _buttonA.size.height / 2.0f + ButtonMarginFromPad;

        vector_float2 center = (vector_float2){

            _rightPad.position.x + _rightPad.size.width  / 2.0f,

            _rightPad.position.y + _rightPad.size.height / 2.0f };

        CGPoint buttonCenterOffset =  CGPointMake(_buttonA.size.width / 2.0f, _buttonA.size.height / 2.0f);

        _buttonA.position = CGPointMake(

            center.x + buttonDistance * cosf(ToRadian(ButtonAPositionAngleDegree)) - buttonCenterOffset.x,

            center.y + buttonDistance * sinf(ToRadian(ButtonAPositionAngleDegree)) - buttonCenterOffset.y);

        [self addChild:_buttonA];

        _buttonB.position = CGPointMake(

            center.x + buttonDistance * cosf(ToRadian(ButtonBPositionAngleDegree)) - buttonCenterOffset.x,

            center.y + buttonDistance * sinf(ToRadian(ButtonBPositionAngleDegree)) - buttonCenterOffset.y);

        [self addChild:_buttonB];

    }

    return self;

}

@end