ユーザーがトリガーを伸ばして方向を与え、トリガーをボールに当てるとボールがそれに応じて動くようにトリガーを作りたいです。
ボールの速度と方向はトリガーによって異なります。
私はbox2dが初めてです。
私が欲しいものはリンクをチェックしてください。
http://dc694.4shared.com/img/Nw7YYLNL/s7/pool.png?async&0.2852371991612017
-(id) init
{
if( (self=[super init])) {
CGSize winSize = [CCDirector sharedDirector].winSize;
// Create a world
b2Vec2 gravity = b2Vec2(0.0f, 0.0f);
_world = new b2World(gravity);
// Create sprite and add it to the layer
CCSprite *Trigger = [CCSprite spriteWithFile:@"Trigger.png"];
Trigger.position = ccp(10, 50);
Trigger.tag = 1;
[self addChild:Trigger];
// Create Trigger body
b2BodyDef TriggerBodyDef;
TriggerBodyDef.type = b2_dynamicBody;
TriggerBodyDef.position.Set(127/PTM_RATIO, 210/PTM_RATIO);
TriggerBodyDef.userData = ball;
TriggerBody = _world->CreateBody(&TriggerBodyDef); // b2Body * ballBody
// Create circle shape
b2CircleShape circle;
circle.m_radius = 26.0/PTM_RATIO;
// Create shape definition and add to body
b2FixtureDef TriggerShapeDef;
TriggerShapeDef.shape = &circle;
TriggerShapeDef.density = 15.0f;
TriggerShapeDef.friction = 2.f;
TriggerShapeDef.restitution = 0.0f;
_TriggerFixture = TriggerBody->CreateFixture(&TriggerShapeDef);
b2Vec2 force = b2Vec2(10, -12);
TriggerBody->ApplyLinearImpulse(force, TriggerBodyDef.position);
///////////////////////// Ball ///////////////////////////////
// Create sprite and add it to the layer
CCSprite *ball = [CCSprite spriteWithFile:@"ball.png"];
ball.position = ccp(100, 200);
ball.tag = 1;
[self addChild:ball];
// Create ball body
b2BodyDef ballBodyDef;
ballBodyDef.type = b2_dynamicBody;
ballBodyDef.position.Set(127/PTM_RATIO, 210/PTM_RATIO);
ballBodyDef.userData = ball;
ballBody = _world->CreateBody(&ballBodyDef); // b2Body * ballBody
// Create circle shape
b2CircleShape circle;
circle.m_radius = 26.0/PTM_RATIO;
// Create shape definition and add to body
b2FixtureDef ballShapeDef;
ballShapeDef.shape = &circle;
ballShapeDef.density = 15.0f;
ballShapeDef.friction = 2.f;
ballShapeDef.restitution = 0.0f;
_ballFixture = ballBody->CreateFixture(&ballShapeDef);
b2Vec2 force = b2Vec2(73, -52);
ballBody->ApplyLinearImpulse(force, ballBodyDef.position);
//ballBody->SetLinearVelocity(b2Vec2(10,0)); // try
// ballBody->SetAngularVelocity(0); // try
///////////////////////// Ball ///////////////////////////////
// Create paddle and add it to the layer
CCSprite *paddle = [CCSprite spriteWithFile:@"paddle.png"];
paddle.position = ccp(winSize.width/2, 50);
[self addChild:paddle];
// Create paddle body
b2BodyDef paddleBodyDef;
paddleBodyDef.type = b2_staticBody; //b2_staticBody, b2_dynamicBody
paddleBodyDef.position.Set(winSize.width/2/PTM_RATIO, 50/PTM_RATIO);
paddleBodyDef.userData = paddle;
paddleBodyDef.angle = 75;
_paddleBody = _world->CreateBody(&paddleBodyDef);
// Create paddle shape
b2PolygonShape paddleShape;
paddleShape.SetAsBox(paddle.contentSize.width/PTM_RATIO/2, paddle.contentSize.height/ PTM_RATIO/2);
// Create shape definition and add to body
b2FixtureDef paddleShapeDef;
paddleShapeDef.shape = &paddleShape;
paddleShapeDef.density = 25.0f;
paddleShapeDef.friction = 1.1f;
paddleShapeDef.restitution = 0.1f;
_paddleFixture = _paddleBody->CreateFixture(&paddleShapeDef);
// Restrict paddle along the x axis
b2PrismaticJointDef jointDef;
b2Vec2 worldAxis(0.0f, 0.0f);
jointDef.collideConnected = true;
jointDef.Initialize(_paddleBody, _groundBody, _paddleBody->GetWorldCenter(), worldAxis);
_world->CreateJoint(&jointDef);
[self schedule:@selector(tick:)];
self.touchEnabled = YES;
}
- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
if (_mouseJoint != NULL) return;
UITouch *myTouch = [touches anyObject];
CGPoint location = [myTouch locationInView:[myTouch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
b2Vec2 locationWorld = b2Vec2(location.x/PTM_RATIO, location.y/PTM_RATIO);
if (_paddleFixture->TestPoint(locationWorld)) {
b2MouseJointDef md;
md.bodyA = _groundBody;
md.bodyB = _paddleBody;
md.target = locationWorld;
md.collideConnected = true;
md.maxForce = 1000.0f * _paddleBody->GetMass();
_mouseJoint = (b2MouseJoint *)_world->CreateJoint(&md);
_paddleBody->SetAwake(true);
}
// [self kick];
}
-(void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
if (_mouseJoint == NULL) return;
UITouch *myTouch = [touches anyObject];
CGPoint location = [myTouch locationInView:[myTouch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
b2Vec2 locationWorld = b2Vec2(location.x/PTM_RATIO, location.y/PTM_RATIO);
_mouseJoint->SetTarget(locationWorld);
}
トリガーを作成できず、トリガー イメージに物理演算を適用できません。トリガー本体に物理を適用する方法は? そして、ボール本体はトリガーに応じてどのように動きますか?