Example usage for com.badlogic.gdx.physics.box2d Body createFixture

Introduction

In this page you can find the example usage for com.badlogic.gdx.physics.box2d Body createFixture.

Prototype

public Fixture createFixture(Shape shape, float density) 

Source Link

Document

Creates a fixture from a shape and attach it to this body.

Usage

From source file:com.agateau.pixelwheels.utils.Box2DUtils.java

License:Open Source License

@SuppressWarnings("unused")
public static Body createStaticBox(World world, float x, float y, float width, float height) {
    BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyDef.BodyType.StaticBody;
    bodyDef.position.set(x + width / 2, y + height / 2);
    Body body = world.createBody(bodyDef);

    PolygonShape shape = new PolygonShape();
    shape.setAsBox(width / 2, height / 2);

    body.createFixture(shape, 1);
    return body;/* w w w.j a  v a2  s.  c  o m*/
}

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From source file:com.agateau.pixelwheels.utils.Box2DUtils.java

License:Open Source License

public static Body createStaticBodyForMapObject(World world, MapObject object) {
    final float u = Constants.UNIT_FOR_PIXEL;
    float rotation = object.getProperties().get("rotation", 0f, Float.class);

    BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyDef.BodyType.StaticBody;
    bodyDef.angle = -rotation * MathUtils.degreesToRadians;

    if (object instanceof RectangleMapObject) {
        Rectangle rect = ((RectangleMapObject) object).getRectangle();

        /*/* w w  w  . j av a2  s. c  o  m*/
          A          D
           x--------x
           |        |
           x--------x
          B          C
         */
        float[] vertices = new float[8];
        // A
        vertices[0] = 0;
        vertices[1] = 0;
        // B
        vertices[2] = 0;
        vertices[3] = -rect.getHeight();
        // C
        vertices[4] = rect.getWidth();
        vertices[5] = -rect.getHeight();
        // D
        vertices[6] = rect.getWidth();
        vertices[7] = 0;
        scaleVertices(vertices, u);

        bodyDef.position.set(u * rect.getX(), u * (rect.getY() + rect.getHeight()));
        Body body = world.createBody(bodyDef);

        PolygonShape shape = new PolygonShape();
        shape.set(vertices);

        body.createFixture(shape, 1);
        return body;
    } else if (object instanceof PolygonMapObject) {
        Polygon polygon = ((PolygonMapObject) object).getPolygon();
        float[] vertices = polygon.getVertices().clone();
        scaleVertices(vertices, u);

        bodyDef.position.set(polygon.getX() * u, polygon.getY() * u);
        Body body = world.createBody(bodyDef);

        PolygonShape shape = new PolygonShape();
        shape.set(vertices);

        body.createFixture(shape, 1);
        return body;
    } else if (object instanceof EllipseMapObject) {
        Ellipse ellipse = ((EllipseMapObject) object).getEllipse();
        float radius = ellipse.width * u / 2;
        float x = ellipse.x * u + radius;
        float y = ellipse.y * u + radius;

        bodyDef.position.set(x, y);
        Body body = world.createBody(bodyDef);

        CircleShape shape = new CircleShape();
        shape.setRadius(radius);

        body.createFixture(shape, 1);
        return body;
    }
    throw new RuntimeException("Unsupported MapObject type: " + object);
}

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From source file:com.badlogic.gdx.tests.box2d.Bridge.java

License:Apache License

@Override
protected void createWorld(World world) {
    Body ground;
    {/*from   w ww  . j a va  2 s. co m*/
        BodyDef bd = new BodyDef();
        ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-40, 0), new Vector2(40.0f, 0));

        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 0.125f);
        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;
        fd.friction = 0.2f;

        RevoluteJointDef jd = new RevoluteJointDef();

        Body prevBody = ground;

        for (int i = 0; i < e_count; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;
            bd.position.set(-14.5f + 1.0f * i, 5.0f);
            Body body = world.createBody(bd);
            body.createFixture(fd);

            Vector2 anchor = new Vector2(-15.0f + 1.0f * i, 5.0f);
            jd.initialize(prevBody, body, anchor);
            world.createJoint(jd);
            prevBody = body;
        }

        Vector2 anchor = new Vector2(-15.0f + 1.0f * e_count, 5.0f);
        jd.initialize(prevBody, ground, anchor);
        world.createJoint(jd);
        shape.dispose();
    }

    for (int i = 0; i < 2; i++) {
        Vector2[] vertices = new Vector2[3];
        vertices[0] = new Vector2(-0.5f, 0);
        vertices[1] = new Vector2(0.5f, 0);
        vertices[2] = new Vector2(0, 1.5f);

        PolygonShape shape = new PolygonShape();
        shape.set(vertices);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 1.0f;

        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-8.0f + 8.0f * i, 12.0f);
        Body body = world.createBody(bd);
        body.createFixture(fd);

        shape.dispose();
    }

    for (int i = 0; i < 3; i++) {
        CircleShape shape = new CircleShape();
        shape.setRadius(0.5f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 1.0f;

        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-6.0f + 6.0f * i, 10.0f);

        Body body = world.createBody(bd);
        body.createFixture(fd);

        shape.dispose();
    }
}

---

From source file:com.badlogic.gdx.tests.box2d.Cantilever.java

License:Apache License

@Override
protected void createWorld(World world) {
    Body ground;
    {/*from   w  ww.ja  v  a 2s. c  om*/
        BodyDef bd = new BodyDef();
        ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-40, 0), new Vector2(40, 0));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 0.125f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;

        WeldJointDef jd = new WeldJointDef();

        Body prevBody = ground;
        for (int i = 0; i < e_count; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;
            bd.position.set(-14.5f + 1.0f * i, 5.0f);
            Body body = world.createBody(bd);
            body.createFixture(fd);

            Vector2 anchor = new Vector2(-15.0f + 1 * i, 5.0f);
            jd.initialize(prevBody, body, anchor);
            world.createJoint(jd);
            prevBody = body;
        }

        shape.dispose();
    }

    {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 0.125f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;

        WeldJointDef jd = new WeldJointDef();

        Body prevBody = ground;
        for (int i = 0; i < e_count; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;
            bd.position.set(-14.5f + 1.0f * i, 15.0f);
            bd.gravityScale = 10.0f;
            Body body = world.createBody(bd);
            body.createFixture(fd);

            Vector2 anchor = new Vector2(-15.0f + 1.0f * i, 15.0f);
            jd.initialize(prevBody, body, anchor);
            world.createJoint(jd);

            prevBody = body;
        }

        shape.dispose();
    }

    {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 0.125f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;

        WeldJointDef jd = new WeldJointDef();

        Body prevBody = ground;
        for (int i = 0; i < e_count; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;
            bd.position.set(-4.5f + 1.0f * i, 5.0f);
            Body body = world.createBody(bd);
            body.createFixture(fd);

            if (i > 0) {
                Vector2 anchor = new Vector2(-5.0f + 1.0f * i, 5.0f);
                jd.initialize(prevBody, body, anchor);
                world.createJoint(jd);
            }

            prevBody = body;
        }

        shape.dispose();
    }

    {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 0.125f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;

        WeldJointDef jd = new WeldJointDef();

        Body prevBody = ground;
        for (int i = 0; i < e_count; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;
            bd.position.set(5.5f + 1.0f * i, 10.0f);
            bd.gravityScale = 10.0f;
            Body body = world.createBody(bd);
            body.createFixture(fd);

            if (i > 0) {
                Vector2 anchor = new Vector2(5.0f + 1.0f * i, 10.0f);
                jd.initialize(prevBody, body, anchor);
                world.createJoint(jd);
            }

            prevBody = body;
        }

        shape.dispose();
    }

    for (int i = 0; i < 2; i++) {
        Vector2[] vertices = new Vector2[3];
        vertices[0] = new Vector2(-0.5f, 0);
        vertices[1] = new Vector2(0.5f, 0);
        vertices[2] = new Vector2(0, 1.5f);

        PolygonShape shape = new PolygonShape();
        shape.set(vertices);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 1.0f;

        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-8.0f + 8.0f * i, 12.0f);
        Body body = world.createBody(bd);
        body.createFixture(fd);

        shape.dispose();
    }

    for (int i = 0; i < 2; i++) {
        CircleShape shape = new CircleShape();
        shape.setRadius(0.5f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 1.0f;

        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-6.0f + 6.0f * i, 10.0f);
        Body body = world.createBody(bd);
        body.createFixture(fd);
        shape.dispose();
    }
}

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From source file:com.badlogic.gdx.tests.box2d.Chain.java

License:Apache License

@Override
protected void createWorld(World world) {
    Body ground;

    {/*from  w  w  w. ja  v a 2  s . co m*/
        BodyDef bd = new BodyDef();
        ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-40, 0), new Vector2(40, 0));

        ground.createFixture(shape, 0.0f);
        shape.dispose();
    }

    {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.6f, 0.125f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;
        fd.friction = 0.2f;

        RevoluteJointDef jd = new RevoluteJointDef();
        jd.collideConnected = false;

        float y = 25.0f;
        Body prevBody = ground;

        for (int i = 0; i < 30; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;
            bd.position.set(0.5f + i, y);
            Body body = world.createBody(bd);
            body.createFixture(fd);

            Vector2 anchor = new Vector2(i, y);
            jd.initialize(prevBody, body, anchor);
            world.createJoint(jd);
            prevBody = body;
        }

        shape.dispose();
    }
}

---

From source file:com.badlogic.gdx.tests.box2d.CharacterCollision.java

License:Apache License

@Override
protected void createWorld(World world) {
    {/*from   w w  w .  j  a va2 s .co  m*/
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-20, 0), new Vector2(20, 0));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.setRadius(0);
        shape.set(new Vector2(-8, 1), new Vector2(-6, 1));
        ground.createFixture(shape, 0);
        shape.set(new Vector2(-6, 1), new Vector2(-4, 1));
        ground.createFixture(shape, 0);
        shape.set(new Vector2(-4, 1), new Vector2(-2, 1));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(1, 1, new Vector2(4, 3), 0);
        ground.createFixture(shape, 0);
        shape.setAsBox(1, 1, new Vector2(6, 3), 0);
        ground.createFixture(shape, 0);
        shape.setAsBox(1, 1, new Vector2(8, 3), 0);
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        float d = 2 * 2 * 0.005f;
        shape.setRadius(0);
        shape.set(new Vector2(-1 + d, 3), new Vector2(1 - d, 3));
        ground.createFixture(shape, 0);
        shape.set(new Vector2(1, 3 + d), new Vector2(1, 5 - d));
        ground.createFixture(shape, 0);
        shape.set(new Vector2(1 - d, 5), new Vector2(-1 + d, 5));
        ground.createFixture(shape, 0);
        shape.set(new Vector2(-1, 5 - d), new Vector2(-1, 3 + d));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        bd.position.set(-3, 5);
        bd.type = BodyType.DynamicBody;
        bd.fixedRotation = true;
        bd.allowSleep = false;

        Body body = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 0.5f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;
        body.createFixture(fd);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        bd.position.set(-5, 5);
        bd.type = BodyType.DynamicBody;
        bd.fixedRotation = true;
        bd.allowSleep = false;

        Body body = world.createBody(bd);

        float angle = 0;
        float delta = (float) Math.PI / 3;
        Vector2[] vertices = new Vector2[6];
        for (int i = 0; i < 6; i++) {
            vertices[i] = new Vector2(0.5f * (float) Math.cos(angle), 0.5f * (float) Math.sin(angle));
            angle += delta;
        }

        PolygonShape shape = new PolygonShape();
        shape.set(vertices);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;
        body.createFixture(fd);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        bd.position.set(3, 5);
        bd.type = BodyType.DynamicBody;
        bd.fixedRotation = true;
        bd.allowSleep = false;

        Body body = world.createBody(bd);

        CircleShape shape = new CircleShape();
        shape.setRadius(0.5f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 20.0f;
        body.createFixture(fd);
        shape.dispose();
    }
}

---

From source file:com.badlogic.gdx.tests.box2d.OneSidedPlatform.java

License:Apache License

@Override
protected void createWorld(World world) {
    {/*from   w ww .ja v a2 s  . co  m*/
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-20.0f, 0), new Vector2(20.0f, 0f));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        bd.position.set(0, 10);
        Body body = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(3, 0.5f);
        m_platform = body.createFixture(shape, 0);
        m_bottom = 10.0f - 0.5f;
        m_top = 10.0f + 0.5f;
    }

    {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(0, 12);
        Body body = world.createBody(bd);

        m_radius = 0.5f;
        CircleShape shape = new CircleShape();
        shape.setRadius(m_radius);
        m_character = body.createFixture(shape, 20.0f);
        shape.dispose();

        m_state = State.Unknown;
    }

    world.setContactFilter(new ContactFilter() {

        @Override
        public boolean shouldCollide(Fixture fixtureA, Fixture fixtureB) {
            if ((fixtureA == m_platform && fixtureB == m_character)
                    || (fixtureA == m_platform && fixtureB == m_character)) {
                Vector2 position = m_character.getBody().getPosition();
                if (position.y < m_top + m_radius - 3.0f * 0.005f)
                    return false;
                else
                    return true;
            } else
                return true;
        }

    });
}

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From source file:com.badlogic.gdx.tests.box2d.Prismatic.java

License:Apache License

@Override
protected void createWorld(World world) {
    Body ground;

    {/*from  w  ww.  ja v a 2s.c o  m*/
        BodyDef bd = new BodyDef();
        ground = world.createBody(bd);
        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-40, 0), new Vector2(40, 0));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(2, 5);

        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-10, 10);
        bd.angle = 0.5f * (float) Math.PI;
        bd.allowSleep = false;

        Body body = world.createBody(bd);
        body.createFixture(shape, 5.0f);

        PrismaticJointDef pjd = new PrismaticJointDef();

        Vector2 axis = new Vector2(2, 1);
        axis.nor();
        pjd.initialize(ground, body, new Vector2(0, 0), axis);

        pjd.motorSpeed = 10.0f;
        pjd.maxMotorForce = 10000.0f;
        pjd.enableMotor = true;
        pjd.lowerTranslation = 0;
        pjd.upperTranslation = 20.0f;
        pjd.enableLimit = true;

        m_joint = (PrismaticJoint) world.createJoint(pjd);
    }
}

---

From source file:com.badlogic.gdx.tests.box2d.Pyramid.java

License:Apache License

@Override
protected void createWorld(World world) {
    {// w  w  w.j a  v a2s. co m
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-40, 0), new Vector2(40, 0));
        ground.createFixture(shape, 0.0f);
        shape.dispose();
    }

    {
        float a = 0.5f;
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(a, a);

        Vector2 x = new Vector2(-7.0f, 0.75f);
        Vector2 y = new Vector2();
        Vector2 deltaX = new Vector2(0.5625f, 1.25f);
        Vector2 deltaY = new Vector2(1.125f, 0.0f);

        for (int i = 0; i < 20; i++) {
            y.set(x);

            for (int j = i; j < 20; j++) {
                BodyDef bd = new BodyDef();
                bd.type = BodyType.DynamicBody;
                bd.position.set(y);
                Body body = world.createBody(bd);
                body.createFixture(shape, 5.0f);

                y.add(deltaY);
            }

            x.add(deltaX);
        }

    }
}

---

From source file:com.badlogic.gdx.tests.box2d.SphereStack.java

License:Apache License

@Override
protected void createWorld(World world) {
    {/*  www . jav  a 2 s  . com*/
        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-40, 0), new Vector2(40, 0));
        ground.createFixture(shape, 0);
        shape.dispose();
    }

    {
        CircleShape shape = new CircleShape();
        shape.setRadius(1.0f);

        for (int i = 0; i < e_count; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;
            bd.position.set(0, 4.0f + 3.0f * i);
            Body body = world.createBody(bd);
            body.createFixture(shape, 1.0f);
        }

        shape.dispose();
    }

}

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