org.jbox2d.dynamics.Body.createFixture()方法的使用及代码示例

x33g5p2x  于2022-01-17 转载在 其他  
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本文整理了Java中org.jbox2d.dynamics.Body.createFixture()方法的一些代码示例，展示了Body.createFixture()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Body.createFixture()方法的具体详情如下：
包路径：org.jbox2d.dynamics.Body
类名称：Body
方法名：createFixture

Body.createFixture介绍

[英]Creates a fixture from a shape and attach it to this body. This is a convenience function. Use FixtureDef if you need to set parameters like friction, restitution, user data, or filtering. If the density is non-zero, this function automatically updates the mass of the body.
[中]从形状创建设备并将其附着到此实体。这是一个方便的函数。如果需要设置摩擦、恢复、用户数据或过滤等参数，请使用FixtureDef。如果“密度”为非零，此函数将自动更新实体的质量。

代码示例

代码示例来源：origin: libgdx/libgdx

/**
 * Creates a fixture from a shape and attach it to this body. This is a convenience function. Use
 * FixtureDef if you need to set parameters like friction, restitution, user data, or filtering.
 * If the density is non-zero, this function automatically updates the mass of the body.
 * 
 * @param shape the shape to be cloned.
 * @param density the shape density (set to zero for static bodies).
 * @warning This function is locked during callbacks.
 */
public final Fixture createFixture(Shape shape, float density) {
 fixDef.shape = shape;
 fixDef.density = density;
 return createFixture(fixDef);
}

代码示例来源：origin: libgdx/libgdx

/** Creates a fixture from a shape and attach it to this body. This is a convenience function. Use b2FixtureDef if you need to
 * set parameters like friction, restitution, user data, or filtering. If the density is non-zero, this function automatically
 * updates the mass of the body.
 * @param shape the shape to be cloned.
 * @param density the shape density (set to zero for static bodies).
 * @warning This function is locked during callbacks. */
public Fixture createFixture (Shape shape, float density) {
  org.jbox2d.dynamics.Fixture f = body.createFixture(shape.shape, density);
  Fixture fixture = new Fixture(this, f);
  fixtures.add(fixture);
  world.fixtures.put(f, fixture);
  return fixture;
}

代码示例来源：origin: libgdx/libgdx

/** Creates a fixture and attach it to this body. Use this function if you need to set some fixture parameters, like friction.
 * Otherwise you can create the fixture directly from a shape. If the density is non-zero, this function automatically updates
 * the mass of the body. Contacts are not created until the next time step.
 * @param def the fixture definition.
 * @warning This function is locked during callbacks. */
public Fixture createFixture (FixtureDef def) {
  org.jbox2d.dynamics.FixtureDef fd = def.toJBox2d();
  org.jbox2d.dynamics.Fixture f = body.createFixture(fd);
  Fixture fixture = new Fixture(this, f);
  fixtures.add(fixture);
  world.fixtures.put(f, fixture);
  return fixture;
}

代码示例来源：origin: konsoletyper/teavm

ballDef.position.y = 3 + y;
Body body = world.createBody(ballDef);
body.createFixture(fixtureDef);
body.createFixture(fixtureDef);
body.createFixture(fixtureDef);
body.createFixture(fixtureDef);

代码示例来源：origin: konsoletyper/teavm

private void initReel() {
  BodyDef reelDef = new BodyDef();
  reelDef.type = BodyType.DYNAMIC;
  reelDef.position = new Vec2(3, 3);
  reel = world.createBody(reelDef);
  FixtureDef fixture = new FixtureDef();
  fixture.friction = 0.5f;
  fixture.restitution = 0.4f;
  fixture.density = 1;
  int parts = 30;
  for (int i = 0; i < parts; ++i) {
    PolygonShape shape = new PolygonShape();
    double angle1 = i / (double) parts * 2 * Math.PI;
    double x1 = 2.7 * Math.cos(angle1);
    double y1 = 2.7 * Math.sin(angle1);
    double angle2 = (i + 1) / (double) parts * 2 * Math.PI;
    double x2 = 2.7 * Math.cos(angle2);
    double y2 = 2.7 * Math.sin(angle2);
    double angle = (angle1 + angle2) / 2;
    double x = 0.01 * Math.cos(angle);
    double y = 0.01 * Math.sin(angle);
    shape.set(new Vec2[] { new Vec2((float) x1, (float) y1), new Vec2((float) x2, (float) y2),
        new Vec2((float) (x2 - x), (float) (y2 - y)), new Vec2((float) (x1 - x), (float) (y1 - y)) }, 4);
    fixture.shape = shape;
    reel.createFixture(fixture);
  }
}

代码示例来源：origin: konsoletyper/teavm

private void initAxis() {
  BodyDef axisDef = new BodyDef();
  axisDef.type = BodyType.STATIC;
  axisDef.position = new Vec2(3, 3);
  axis = world.createBody(axisDef);
  CircleShape axisShape = new CircleShape();
  axisShape.setRadius(0.02f);
  axisShape.m_p.set(0, 0);
  FixtureDef axisFixture = new FixtureDef();
  axisFixture.shape = axisShape;
  axis.createFixture(axisFixture);
}

代码示例来源：origin: jbox2d/jbox2d

/**
 * Creates a fixture from a shape and attach it to this body. This is a convenience function. Use
 * FixtureDef if you need to set parameters like friction, restitution, user data, or filtering.
 * If the density is non-zero, this function automatically updates the mass of the body.
 * 
 * @param shape the shape to be cloned.
 * @param density the shape density (set to zero for static bodies).
 * @warning This function is locked during callbacks.
 */
public final Fixture createFixture(Shape shape, float density) {
 fixDef.shape = shape;
 fixDef.density = density;
 return createFixture(fixDef);
}

代码示例来源：origin: jbox2d/jbox2d

public void createCircle()
{
  float radius = 2.0f;
  CircleShape shape = new CircleShape();
  shape.m_p.setZero();
  shape.m_radius = radius;
  FixtureDef fd = new FixtureDef();
  fd.shape = shape;
  fd.density = 1.0f;
  fd.friction = 0.0f;
  Vec2 p = new Vec2((float)Math.random(), 3.0f + (float)Math.random());
  BodyDef bd = new BodyDef();
  bd.type = BodyType.DYNAMIC;
  bd.position = p;
  //bd.allowSleep = false;
  Body body = getWorld().createBody(bd);
  body.createFixture(fd);
}

代码示例来源：origin: jbox2d/jbox2d

void Create(int index) {
 BodyDef bd = new BodyDef();
 bd.type = BodyType.DYNAMIC;
 float x = MathUtils.randomFloat(-2.0f, 2.0f);
 bd.position.set(x, 10.0f);
 bd.angle = MathUtils.randomFloat(-MathUtils.PI, MathUtils.PI);
 if (index == 4) {
  bd.angularDamping = 0.02f;
 }
 m_bodies[m_bodyIndex] = getWorld().createBody(bd);
 if (index < 4) {
  FixtureDef fd = new FixtureDef();
  fd.shape = m_polygons[index];
  fd.density = 1.0f;
  fd.friction = 0.3f;
  m_bodies[m_bodyIndex].createFixture(fd);
 } else {
  FixtureDef fd = new FixtureDef();
  fd.shape = m_circle;
  fd.density = 1.0f;
  fd.friction = 0.3f;
  m_bodies[m_bodyIndex].createFixture(fd);
 }
 m_bodyIndex = (m_bodyIndex + 1) % k_maxBodies;
}

代码示例来源：origin: jbox2d/jbox2d

@Override
public synchronized void step(TestbedSettings settings) {
 super.step(settings);
 if (m_count < MAX_NUM) {
  BodyDef bd = new BodyDef();
  bd.type = BodyType.DYNAMIC;
  bd.position.set(0.0f, 10.0f);
  Body body = m_world.createBody(bd);
  PolygonShape shape = new PolygonShape();
  shape.setAsBox(0.125f, 0.125f);
  body.createFixture(shape, 1.0f);
  ++m_count;
 }
}

代码示例来源：origin: jbox2d/jbox2d

@Override
public void keyPressed(char key, int argKeyCode) {
 switch (key) {
  case 'c':
   if (m_fixture2 == null) {
    CircleShape shape = new CircleShape();
    shape.m_radius = 3.0f;
    shape.m_p.set(0.5f, -4.0f);
    m_fixture2 = m_body.createFixture(shape, 10.0f);
    m_body.setAwake(true);
   }
   break;
  case 'd':
   if (m_fixture2 != null) {
    m_body.destroyFixture(m_fixture2);
    m_fixture2 = null;
    m_body.setAwake(true);
   }
   break;
 }
}

代码示例来源：origin: jbox2d/jbox2d

public void makeDomino(float x, float y, boolean horizontal, World world) {
 PolygonShape sd = new PolygonShape();
 sd.setAsBox(.5f * dwidth, .5f * dheight);
 FixtureDef fd = new FixtureDef();
 fd.shape = sd;
 fd.density = ddensity;
 BodyDef bd = new BodyDef();
 bd.type = BodyType.DYNAMIC;
 fd.friction = dfriction;
 fd.restitution = 0.65f;
 bd.position = new Vec2(x, y);
 bd.angle = horizontal ? (float) (Math.PI / 2.0) : 0f;
 Body myBody = getWorld().createBody(bd);
 myBody.createFixture(fd);
}

代码示例来源：origin: jbox2d/jbox2d

@Override
public void initTest(boolean argDeserialized) {
 // Ground body
 {
  BodyDef bd = new BodyDef();
  Body ground = getWorld().createBody(bd);
  EdgeShape shape = new EdgeShape();
  shape.set(new Vec2(-40.0f, 0.0f), new Vec2(40.0f, 0.0f));
  ground.createFixture(shape, 0.0f);
 }
 // Breakable dynamic body
 {
  BodyDef bd = new BodyDef();
  bd.type = BodyType.DYNAMIC;
  bd.position.set(0.0f, 40.0f);
  bd.angle = 0.25f * MathUtils.PI;
  m_body1 = getWorld().createBody(bd);
  m_shape1 = new PolygonShape();
  m_shape1.setAsBox(0.5f, 0.5f, new Vec2(-0.5f, 0.0f), 0.0f);
  m_piece1 = m_body1.createFixture(m_shape1, 1.0f);
  m_shape2 = new PolygonShape();
  m_shape2.setAsBox(0.5f, 0.5f, new Vec2(0.5f, 0.0f), 0.0f);
  m_piece2 = m_body1.createFixture(m_shape2, 1.0f);
 }
 m_break = false;
 m_broke = false;
}

代码示例来源：origin: jbox2d/jbox2d

@Override
public void initTest(boolean argDeserialized) {
 {
  BodyDef bd = new BodyDef();
  Body ground = getWorld().createBody(bd);
  EdgeShape shape = new EdgeShape();
  shape.set(new Vec2(-40.0f, 0.0f), new Vec2(40.0f, 0.0f));
  ground.createFixture(shape, 0.0f);
 }
 BodyDef bd = new BodyDef();
 bd.type = BodyType.DYNAMIC;
 bd.position.set(0.0f, 10.0f);
 m_body = getWorld().createBody(bd);
 PolygonShape shape = new PolygonShape();
 shape.setAsBox(4.0f, 4.0f, new Vec2(0.0f, 0.0f), 0.0f);
 m_fixture1 = m_body.createFixture(shape, 10.0f);
 m_fixture2 = null;
}

代码示例来源：origin: jbox2d/jbox2d

@Override
public void initTest(boolean deserialized) {
 if (deserialized) {
  return;
 }
 Body bodies[] = new Body[e_count];
 {
  BodyDef bd = new BodyDef();
  Body ground = getWorld().createBody(bd);
  EdgeShape shape = new EdgeShape();
  shape.set(new Vec2(-40.0f, 0.0f), new Vec2(40.0f, 0.0f));
  ground.createFixture(shape, 0.0f);
 }
 {
  CircleShape shape = new CircleShape();
  shape.m_radius = 1.0f;
  for (int i = 0; i < e_count; ++i) {
   BodyDef bd = new BodyDef();
   bd.type = BodyType.DYNAMIC;
   bd.position.set(0.0f, 4.0f + 3.0f * i);
   bodies[i] = getWorld().createBody(bd);
   bodies[i].createFixture(shape, 1.0f);
   // m_bodies[i].setLinearVelocity(new Vec2(0.0f, -100.0f));
  }
 }
}

代码示例来源：origin: jbox2d/jbox2d

@Override
public void keyPressed(char argKeyChar, int argKeyCode) {
 switch (argKeyChar) {
  case ',':
   if (m_bullet != null) {
    getWorld().destroyBody(m_bullet);
    m_bullet = null;
   }
   {
    CircleShape shape = new CircleShape();
    shape.m_radius = 0.25f;
    FixtureDef fd = new FixtureDef();
    fd.shape = shape;
    fd.density = 20.0f;
    fd.restitution = 0.05f;
    BodyDef bd = new BodyDef();
    bd.type = BodyType.DYNAMIC;
    bd.bullet = true;
    bd.position.set(-31.0f, 5.0f);
    m_bullet = getWorld().createBody(bd);
    m_bullet.createFixture(fd);
    m_bullet.setLinearVelocity(new Vec2(400.0f, 0.0f));
   }
   break;
 }
}

代码示例来源：origin: jbox2d/jbox2d

public Fixture deserializeFixture(Body argBody, PbFixture argFixture) {
 PbFixture f = argFixture;
 FixtureDef fd = new FixtureDef();
 fd.density = f.getDensity();
 fd.filter.categoryBits = f.getFilter().getCategoryBits();
 fd.filter.groupIndex = f.getFilter().getGroupIndex();
 fd.filter.maskBits = f.getFilter().getMaskBits();
 fd.friction = f.getFriction();
 fd.isSensor = f.getSensor();
 fd.restitution = f.getRestitution();
 fd.shape = deserializeShape(f.getShape());
 Fixture fixture = argBody.createFixture(fd);
 if (listener != null && f.hasTag()) {
  listener.processFixture(fixture, f.getTag());
 }
 return fixture;
}

代码示例来源：origin: jbox2d/jbox2d

@Override
public void initTest(boolean deserialized) {
 {
  BodyDef bd = new BodyDef();
  Body ground = m_world.createBody(bd);
  ChainShape shape = new ChainShape();
  Vec2[] vertices =
    new Vec2[] {new Vec2(-20, 0), new Vec2(20, 0), new Vec2(20, 40), new Vec2(-20, 40)};
  shape.createLoop(vertices, 4);
  ground.createFixture(shape, 0.0f);
 }
 m_world.setParticleRadius(0.15f);
 m_world.setParticleDamping(0.2f);
 {
  PolygonShape shape = new PolygonShape();
  shape.setAsBox(8, 10, new Vec2(-12, 10.1f), 0);
  ParticleGroupDef pd = new ParticleGroupDef();
  pd.shape = shape;
  m_world.createParticleGroup(pd);
 }
}

代码示例来源：origin: jbox2d/jbox2d

private void launchBomb(Vec2 position, Vec2 velocity) {
 if (bomb != null) {
  m_world.destroyBody(bomb);
  bomb = null;
 }
 // todo optimize this
 BodyDef bd = new BodyDef();
 bd.type = BodyType.DYNAMIC;
 bd.position.set(position);
 bd.bullet = true;
 bomb = m_world.createBody(bd);
 bomb.setLinearVelocity(velocity);
 CircleShape circle = new CircleShape();
 circle.m_radius = 0.3f;
 FixtureDef fd = new FixtureDef();
 fd.shape = circle;
 fd.density = 20f;
 fd.restitution = 0;
 Vec2 minV = new Vec2(position);
 Vec2 maxV = new Vec2(position);
 minV.subLocal(new Vec2(.3f, .3f));
 maxV.addLocal(new Vec2(.3f, .3f));
 aabb.lowerBound.set(minV);
 aabb.upperBound.set(maxV);
 bomb.createFixture(fd);
}

代码示例来源：origin: jbox2d/jbox2d

void Break() {
 // Create two bodies from one.
 Body body1 = m_piece1.getBody();
 Vec2 center = body1.getWorldCenter();
 body1.destroyFixture(m_piece2);
 m_piece2 = null;
 BodyDef bd = new BodyDef();
 bd.type = BodyType.DYNAMIC;
 bd.position = body1.getPosition();
 bd.angle = body1.getAngle();
 Body body2 = getWorld().createBody(bd);
 m_piece2 = body2.createFixture(m_shape2, 1.0f);
 // Compute consistent velocities for new bodies based on
 // cached velocity.
 Vec2 center1 = body1.getWorldCenter();
 Vec2 center2 = body2.getWorldCenter();
 Vec2 velocity1 = m_velocity.add(Vec2.cross(m_angularVelocity, center1.sub(center)));
 Vec2 velocity2 = m_velocity.add(Vec2.cross(m_angularVelocity, center2.sub(center)));
 body1.setAngularVelocity(m_angularVelocity);
 body1.setLinearVelocity(velocity1);
 body2.setAngularVelocity(m_angularVelocity);
 body2.setLinearVelocity(velocity2);
}

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