在libgdx中,如何在矩形顶部附加圆形? [英] In libgdx how do you attach a circleshape on top of a rectangle?
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问题描述
我创建了一个实体,并创建了两个单独的灯具,一个灯具创建一个矩形,另一个灯具创建一个圆形.但是,当我使用.createfixture时,它将圆放在矩形的中心,我希望圆像火柴一样在矩形的顶部.
I have created a body and I have created two separate fixtures, one fixture creates a rectangle shape and the other fixture creates a circle shape. But when I use the .createfixture it puts the circle in the centre of the rectangle, I want the circle on top of the rectangle like a matchstick.
这是我的代码,不知道该怎么办...
here is my code don't know what to do ...
rectangleBodyDef = new BodyDef();
rectangleBodyDef.type = BodyType.DynamicBody;
rectangleBodyDef.position.set(10,20);
rectangleBody = world.createBody(rectangleBodyDef);
rectangleBodyShape = new PolygonShape();
rectangleBodyShape.setAsBox(2f, 0.75f);
rectangleBodyFixtureDef = new FixtureDef();
rectangleBodyFixtureDef.shape = rectangleBodyShape;
rectangleBodyFixtureDef.restitution = 0.8f;
rectangleBody.createFixture(rectangleBodyFixtureDef);
/**********************CREATING THE SECOND BODY (CIRCLE BODY) ************/
circleShape = new CircleShape();
circleShape.setRadius(0.75f);
circleFixtureDef = new FixtureDef();
circleFixtureDef.shape = circleShape;
circleFixtureDef.restitution = 0.8f;
rectangleBody.createFixture(circleFixtureDef);
推荐答案
CircleShape 位置要比矩形矩形高一点:
Fixture Definitions are relative to the body position, set the CircleShape position to be a little above the rectangle one:
CircleShape circleShape = new CircleShape();
circleShape.setRadius(0.75f);
circleShape.setPosition(new Vector2(0,2)); //<------Add this
FixtureDef circleFixtureDef = new FixtureDef();
circleFixtureDef.shape = circleShape;
circleFixtureDef.restitution = 0.8f;
rectangleBody.createFixture(circleFixtureDef);
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