Example usage for com.badlogic.gdx.math Vector2 Vector2

Introduction

In this page you can find the example usage for com.badlogic.gdx.math Vector2 Vector2.

Prototype

public Vector2(float x, float y) 

Source Link

Document

Constructs a vector with the given components

Usage

From source file:com.axatrikx.solor.view.LevelScreen.java

License:Apache License

/**
 * Returns the spawn position of player//from   w  w w  .  j a va2  s.c  om
 * 
 * @return
 */
private Vector2 getPlayerSpawnPosition() {
    return new Vector2(GameProperties.GAME_VIEWPORT_WIDTH / 2 - 64 / 2, 20);
}

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From source file:com.badlogic.gdx.ai.tests.pfa.tests.tiled.hrchy.HierarchicalTiledGraph.java

License:Apache License

private HierarchicalTiledNode findFloorTileClosestToCenterOfMass(int level, int x0, int y0, int x1, int y1) {
    // Calculate center of mass
    Vector2 centerOfMass = new Vector2(0, 0);
    int floorTiles = 0;
    for (int x = x0; x < x1; x++) {
        for (int y = y0; y < y1; y++) {
            HierarchicalTiledNode n = getNodeAtLevel(level, x, y);
            if (n.type == FlatTiledNode.TILE_FLOOR) {
                centerOfMass.add(n.x, n.y);
                floorTiles++;//  ww w.ja v  a  2 s.  com
            }
        }
    }
    int comx = (int) (centerOfMass.x / floorTiles);
    int comy = (int) (centerOfMass.y / floorTiles);
    HierarchicalTiledNode comTile = getNodeAtLevel(level, comx, comy);
    if (comTile.type == FlatTiledNode.TILE_FLOOR)
        return comTile;

    // Find floor tile closest to the center of mass
    float closetDist2 = Float.POSITIVE_INFINITY;
    HierarchicalTiledNode closestFloor = null;
    for (int x = x0; x < x1; x++) {
        for (int y = y0; y < y1; y++) {
            HierarchicalTiledNode n = getNodeAtLevel(level, x, y);
            if (n.type == FlatTiledNode.TILE_FLOOR) {
                float dist2 = Vector2.dst2(comTile.x, comTile.y, n.x, n.y);
                if (dist2 < closetDist2) {
                    closetDist2 = dist2;
                    closestFloor = n;
                }
            }
        }
    }

    return closestFloor;
}

---

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

License:Apache License

@Override
protected void createWorld(World world) {
    world.setGravity(new Vector2(0, 0));

    float k_restitution = 0.4f;
    Body ground;/*from w ww.  j a  va 2  s.  c o  m*/

    {
        BodyDef bd = new BodyDef();
        bd.position.set(0, 20);
        ground = world.createBody(bd);

        EdgeShape shape = new EdgeShape();

        FixtureDef sd = new FixtureDef();
        sd.shape = shape;
        sd.density = 0;
        sd.restitution = k_restitution;

        shape.set(new Vector2(-20, -20), new Vector2(-20, 20));
        ground.createFixture(sd);

        shape.set(new Vector2(20, -20), new Vector2(20, 20));
        ground.createFixture(sd);

        shape.set(new Vector2(-20, 20), new Vector2(20, 20));
        ground.createFixture(sd);

        shape.set(new Vector2(-20, -20), new Vector2(20, -20));
        ground.createFixture(sd);

        shape.dispose();
    }

    {
        Transform xf1 = new Transform(new Vector2(), 0.3524f * (float) Math.PI);
        xf1.setPosition(xf1.mul(new Vector2(1, 0)));

        Vector2[] vertices = new Vector2[3];
        vertices[0] = xf1.mul(new Vector2(-1, 0));
        vertices[1] = xf1.mul(new Vector2(1, 0));
        vertices[2] = xf1.mul(new Vector2(0, 0.5f));

        PolygonShape poly1 = new PolygonShape();
        poly1.set(vertices);

        FixtureDef sd1 = new FixtureDef();
        sd1.shape = poly1;
        sd1.density = 4.0f;

        Transform xf2 = new Transform(new Vector2(), -0.3524f * (float) Math.PI);
        xf2.setPosition(xf2.mul(new Vector2(-1, 0)));

        vertices[0] = xf2.mul(new Vector2(-1, 0));
        vertices[1] = xf2.mul(new Vector2(1, 0));
        vertices[2] = xf2.mul(new Vector2(0, 0.5f));

        PolygonShape poly2 = new PolygonShape();
        poly2.set(vertices);

        FixtureDef sd2 = new FixtureDef();
        sd2.shape = poly2;
        sd2.density = 2.0f;

        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.angularDamping = 5.0f;
        bd.linearDamping = 0.1f;

        bd.position.set(0, 2);
        bd.angle = (float) Math.PI;
        bd.allowSleep = false;
        m_body = world.createBody(bd);
        m_body.createFixture(sd1);
        m_body.createFixture(sd2);
        poly1.dispose();
        poly2.dispose();
    }

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

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.density = 1.0f;
        fd.friction = 0.3f;

        for (int i = 0; i < 10; i++) {
            BodyDef bd = new BodyDef();
            bd.type = BodyType.DynamicBody;

            bd.position.set(0, 5 + 1.54f * i);
            Body body = world.createBody(bd);

            body.createFixture(fd);

            float gravity = 10.0f;
            float I = body.getInertia();
            float mass = body.getMass();

            float radius = (float) Math.sqrt(2 * I / mass);

            FrictionJointDef jd = new FrictionJointDef();
            jd.localAnchorA.set(0, 0);
            jd.localAnchorB.set(0, 0);
            jd.bodyA = ground;
            jd.bodyB = body;
            jd.collideConnected = true;
            jd.maxForce = mass * gravity;
            jd.maxTorque = mass * radius * gravity;

            world.createJoint(jd);
        }

        shape.dispose();
    }
}

---

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

License:Apache License

@Override
protected void createWorld(World world) {
    Body ground;/*from   w  w  w.ja va 2  s .c  o m*/

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

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-20, 0), new Vector2(20, 0));

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        ground.createFixture(fd);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(0, 3.0f);
        m_attachment = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 2.0f);
        m_attachment.createFixture(shape, 2.0f);
        shape.dispose();
    }

    {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-4.0f, 5.0f);
        m_platform = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 4.0f, new Vector2(4.0f, 0), 0.5f * (float) Math.PI);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.friction = 0.6f;
        fd.density = 2.0f;

        m_platform.createFixture(fd);
        shape.dispose();

        RevoluteJointDef rjd = new RevoluteJointDef();
        rjd.initialize(m_attachment, m_platform, new Vector2(0, 5.0f));
        rjd.maxMotorTorque = 50.0f;
        rjd.enableMotor = true;
        world.createJoint(rjd);

        PrismaticJointDef pjd = new PrismaticJointDef();
        pjd.initialize(ground, m_platform, new Vector2(0, 5.0f), new Vector2(1, 0));

        pjd.maxMotorForce = 1000.0f;
        pjd.enableMotor = true;
        pjd.lowerTranslation = -10f;
        pjd.upperTranslation = 10.0f;
        pjd.enableLimit = true;

        world.createJoint(pjd);

        m_speed = 3.0f;
    }

    {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(0, 8.0f);
        Body body = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.75f, 0.75f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.friction = 0.6f;
        fd.density = 2.0f;

        body.createFixture(fd);
        shape.dispose();
    }
}

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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 w  w . j  av  a2  s .c om
    {
        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();
    }
}

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

License:Apache License

@Override
protected void createWorld(World world) {
    Body ground;/*from ww  w.  j a v  a2 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);
        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;/* ww  w.j  a  va  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, 0.0f);
        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();
    }
}

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

License:Apache License

@Override
protected void createWorld(World world) {
    {/*from   w w  w .  jav a2  s . c  o  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.CollisionFiltering.java

License:Apache License

@Override
protected void createWorld(World world) {
    {/*from   w  w w  .  j a va  2 s  . c  o m*/
        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-40.0f, 0), new Vector2(40, 0));

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.friction = 0.3f;

        BodyDef bd = new BodyDef();
        Body ground = world.createBody(bd);
        ground.createFixture(fd);
        shape.dispose();
    }

    Vector2[] vertices = new Vector2[3];
    vertices[0] = new Vector2(-1, 0);
    vertices[1] = new Vector2(1, 0);
    vertices[2] = new Vector2(0, 2);
    PolygonShape polygon = new PolygonShape();
    polygon.set(vertices);

    FixtureDef triangleShapeDef = new FixtureDef();
    triangleShapeDef.shape = polygon;
    triangleShapeDef.density = 1.0f;

    triangleShapeDef.filter.groupIndex = k_smallGroup;
    triangleShapeDef.filter.categoryBits = k_triangleCategory;
    triangleShapeDef.filter.maskBits = k_triangleMask;

    BodyDef triangleBodyDef = new BodyDef();
    triangleBodyDef.type = BodyType.DynamicBody;
    triangleBodyDef.position.set(-5, 2);

    Body body1 = world.createBody(triangleBodyDef);
    body1.createFixture(triangleShapeDef);

    vertices[0].scl(2);
    vertices[1].scl(2);
    vertices[2].scl(2);

    polygon.set(vertices);
    triangleShapeDef.filter.groupIndex = k_largeGroup;
    triangleBodyDef.position.set(-5, 6);
    triangleBodyDef.fixedRotation = true;

    Body body2 = world.createBody(triangleBodyDef);
    body2.createFixture(triangleShapeDef);

    {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-5, 10);
        Body body = world.createBody(bd);

        PolygonShape p = new PolygonShape();
        p.setAsBox(0.5f, 1.0f);
        body.createFixture(p, 1);

        PrismaticJointDef jd = new PrismaticJointDef();
        jd.bodyA = body2;
        jd.bodyB = body;
        jd.enableLimit = true;
        jd.localAnchorA.set(0, 4);
        jd.localAnchorB.set(0, 0);
        jd.localAxisA.set(0, 1);
        jd.lowerTranslation = -1;
        jd.upperTranslation = 1;

        world.createJoint(jd);

        p.dispose();
    }

    polygon.setAsBox(1, 0.5f);
    FixtureDef boxShapeDef = new FixtureDef();
    boxShapeDef.shape = polygon;
    boxShapeDef.density = 1;
    boxShapeDef.restitution = 0.1f;

    boxShapeDef.filter.groupIndex = k_smallGroup;
    boxShapeDef.filter.categoryBits = k_boxCategory;
    boxShapeDef.filter.maskBits = k_boxMask;

    BodyDef boxBodyDef = new BodyDef();
    boxBodyDef.type = BodyType.DynamicBody;
    boxBodyDef.position.set(0, 2);

    Body body3 = world.createBody(boxBodyDef);
    body3.createFixture(boxShapeDef);

    polygon.setAsBox(2, 1);
    boxShapeDef.filter.groupIndex = k_largeGroup;
    boxBodyDef.position.set(0, 6);

    Body body4 = world.createBody(boxBodyDef);
    body4.createFixture(boxShapeDef);

    CircleShape circle = new CircleShape();
    circle.setRadius(1);

    FixtureDef circleShapeDef = new FixtureDef();
    circleShapeDef.shape = circle;
    circleShapeDef.density = 1.0f;

    circleShapeDef.filter.groupIndex = k_smallGroup;
    circleShapeDef.filter.categoryBits = k_circleCategory;
    circleShapeDef.filter.maskBits = k_circleMask;

    BodyDef circleBodyDef = new BodyDef();
    circleBodyDef.type = BodyType.DynamicBody;
    circleBodyDef.position.set(5, 2);

    Body body5 = world.createBody(circleBodyDef);
    body5.createFixture(circleShapeDef);

    circle.setRadius(2);
    circleShapeDef.filter.groupIndex = k_largeGroup;
    circleBodyDef.position.set(5, 6);

    Body body6 = world.createBody(circleBodyDef);
    body6.createFixture(circleShapeDef);
}

---

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

License:Apache License

@Override
protected void createWorld(World world) {
    world.setContactListener(this);

    // Ground//from w ww .  j  a v  a 2 s.  c  om
    {
        BodyDef bodyDef = new BodyDef();
        groundBody = world.createBody(bodyDef);

        EdgeShape shape = new EdgeShape();
        shape.set(new Vector2(-20.0f, 0.0f), new Vector2(20.0f, 0.0f));
        groundBody.createFixture(shape, 0.0f);
    }

    // Platform
    {
        BodyDef bd = new BodyDef();
        bd.position.set(-5.0f, 5.0f);
        Body body = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(10.0f, 0.5f);

        FixtureDef fd = new FixtureDef();
        fd.shape = shape;
        fd.friction = 0.8f;
        m_platform = body.createFixture(fd);
    }

    // Boxes
    for (int i = 0; i < 5; ++i) {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DynamicBody;
        bd.position.set(-10.0f + 2.0f * i, 7.0f);
        Body body = world.createBody(bd);

        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 0.5f);
        body.createFixture(shape, 20.0f);
    }
}

---

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