public override Shape clone()
{
ChainShape clone = new ChainShape();
clone.createChain(m_vertices, m_count);
clone.m_prevVertex.set(m_prevVertex);
clone.m_nextVertex.set(m_nextVertex);
clone.m_hasPrevVertex = m_hasPrevVertex;
clone.m_hasNextVertex = m_hasNextVertex;
return clone;
}
public override void initTest(bool 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);
}
}
public override void initTest(bool 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);
{
PolygonShape shape = new PolygonShape();
shape.setAsBox(20, 4, new Vec2(0, 36), 0);
ParticleGroupDef pd = new ParticleGroupDef();
pd.flags = ParticleType.b2_tensileParticle | ParticleType.b2_viscousParticle;
pd.shape = shape;
m_world.createParticleGroup(pd);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-20, 32), new Vec2(-12, 32));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-11, 32), new Vec2(20, 32));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-12, 32), new Vec2(-12, 28));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-11, 32), new Vec2(-11, 28));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-16, 24), new Vec2(8, 20));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(16, 16), new Vec2(-8, 12));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-12, 8), new Vec2(-12, 0));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-4, 8), new Vec2(-4, 0));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(4, 8), new Vec2(4, 0));
body.createFixture(shape, 0.1f);
}
{
BodyDef bd = new BodyDef();
Body body = m_world.createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(12, 8), new Vec2(12, 0));
body.createFixture(shape, 0.1f);
}
}
public override void initTest(bool deserialized)
{
if (deserialized)
{
return;
}
// Ground body
{
BodyDef bd = new BodyDef();
Body ground = getWorld().createBody(bd);
EdgeShape shape = new EdgeShape();
shape.set(new Vec2(-20.0f, 0.0f), new Vec2(20.0f, 0.0f));
ground.createFixture(shape, 0.0f);
}
// Collinear edges
// This shows the problematic case where a box shape can hit
// an internal vertex.
{
BodyDef bd = new BodyDef();
Body ground = getWorld().createBody(bd);
EdgeShape shape = new EdgeShape();
shape.m_radius = 0.0f;
shape.set(new Vec2(-8.0f, 1.0f), new Vec2(-6.0f, 1.0f));
ground.createFixture(shape, 0.0f);
shape.set(new Vec2(-6.0f, 1.0f), new Vec2(-4.0f, 1.0f));
ground.createFixture(shape, 0.0f);
shape.set(new Vec2(-4.0f, 1.0f), new Vec2(-2.0f, 1.0f));
ground.createFixture(shape, 0.0f);
}
// Chain shape
{
BodyDef bd = new BodyDef();
bd.angle = 0.25f*MathUtils.PI;
Body ground = getWorld().createBody(bd);
Vec2[] vs = new Vec2[4];
vs[0] = new Vec2(5.0f, 7.0f);
vs[1] = new Vec2(6.0f, 8.0f);
vs[2] = new Vec2(7.0f, 8.0f);
vs[3] = new Vec2(8.0f, 7.0f);
ChainShape shape = new ChainShape();
shape.createChain(vs, 4);
ground.createFixture(shape, 0.0f);
}
// Square tiles. This shows that adjacency shapes may
// have non-smooth collision. There is no solution
// to this problem.
{
BodyDef bd = new BodyDef();
Body ground = getWorld().createBody(bd);
PolygonShape shape = new PolygonShape();
shape.setAsBox(1.0f, 1.0f, new Vec2(4.0f, 3.0f), 0.0f);
ground.createFixture(shape, 0.0f);
shape.setAsBox(1.0f, 1.0f, new Vec2(6.0f, 3.0f), 0.0f);
ground.createFixture(shape, 0.0f);
shape.setAsBox(1.0f, 1.0f, new Vec2(8.0f, 3.0f), 0.0f);
ground.createFixture(shape, 0.0f);
}
// Square made from an edge loop. Collision should be smooth.
{
BodyDef bd = new BodyDef();
Body ground = m_world.createBody(bd);
Vec2[] vs = new Vec2[4];
vs[0] = new Vec2(-1.0f, 3.0f);
vs[1] = new Vec2(1.0f, 3.0f);
vs[2] = new Vec2(1.0f, 5.0f);
vs[3] = new Vec2(-1.0f, 5.0f);
ChainShape shape = new ChainShape();
shape.createLoop(vs, 4);
ground.createFixture(shape, 0.0f);
}
// Edge loop. Collision should be smooth.
{
BodyDef bd = new BodyDef();
bd.position.set(-10.0f, 4.0f);
Body ground = getWorld().createBody(bd);
Vec2[] vs = new Vec2[10];
vs[0] = new Vec2(0.0f, 0.0f);
vs[1] = new Vec2(6.0f, 0.0f);
vs[2] = new Vec2(6.0f, 2.0f);
vs[3] = new Vec2(4.0f, 1.0f);
vs[4] = new Vec2(2.0f, 2.0f);
vs[5] = new Vec2(0.0f, 2.0f);
vs[6] = new Vec2(-2.0f, 2.0f);
vs[7] = new Vec2(-4.0f, 3.0f);
vs[8] = new Vec2(-6.0f, 2.0f);
vs[9] = new Vec2(-6.0f, 0.0f);
ChainShape shape = new ChainShape();
shape.createLoop(vs, 10);
ground.createFixture(shape, 0.0f);
}
// Square character 1
{
BodyDef bd = new BodyDef();
bd.position.set(-3.0f, 8.0f);
bd.type = BodyType.DYNAMIC;
bd.fixedRotation = true;
bd.allowSleep = false;
Body body = getWorld().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);
}
// Square character 2
{
BodyDef bd = new BodyDef();
bd.position.set(-5.0f, 5.0f);
bd.type = BodyType.DYNAMIC;
bd.fixedRotation = true;
bd.allowSleep = false;
Body body = getWorld().createBody(bd);
PolygonShape shape = new PolygonShape();
shape.setAsBox(0.25f, 0.25f);
FixtureDef fd = new FixtureDef();
fd.shape = shape;
fd.density = 20.0f;
body.createFixture(fd);
}
// Hexagon character
{
BodyDef bd = new BodyDef();
bd.position.set(-5.0f, 8.0f);
bd.type = BodyType.DYNAMIC;
bd.fixedRotation = true;
bd.allowSleep = false;
Body body = getWorld().createBody(bd);
float angle = 0.0f;
float delta = MathUtils.PI/3.0f;
Vec2[] vertices = new Vec2[6];
for (int i = 0; i < 6; ++i)
{
vertices[i] = new Vec2(0.5f*MathUtils.cos(angle), 0.5f*MathUtils.sin(angle));
angle += delta;
}
PolygonShape shape = new PolygonShape();
shape.set(vertices, 6);
FixtureDef fd = new FixtureDef();
fd.shape = shape;
fd.density = 20.0f;
body.createFixture(fd);
}
// Circle character
{
BodyDef bd = new BodyDef();
bd.position.set(3.0f, 5.0f);
bd.type = BodyType.DYNAMIC;
bd.fixedRotation = true;
bd.allowSleep = false;
Body body = getWorld().createBody(bd);
CircleShape shape = new CircleShape();
shape.m_radius = 0.5f;
FixtureDef fd = new FixtureDef();
fd.shape = shape;
fd.density = 20.0f;
body.createFixture(fd);
}
// Circle character
{
BodyDef bd = new BodyDef();
bd.position.set(-7.0f, 6.0f);
bd.type = BodyType.DYNAMIC;
bd.allowSleep = false;
m_character = getWorld().createBody(bd);
CircleShape shape = new CircleShape();
shape.m_radius = 0.25f;
FixtureDef fd = new FixtureDef();
fd.shape = shape;
fd.density = 20.0f;
fd.friction = 1;
m_character.createFixture(fd);
}
}