Java – multiple clamps in one body or multiple bodies?

Suppose I want to create 1000 or even 5000 static body lines on the screen What I want to know is the difference between attaching all these wires (lamps) to a single body or placing each fixture on its own body Is there a performance difference between the two methods, or does one method provide more functionality or control other methods?

The difference between the two methods is shown below

Connect each line to a single body:

// Create our body deFinition
    BodyDef groundBodyDef = new BodyDef();
    groundBodyDef.type = BodyType.StaticBody;

    // Create a body from the defintion and add it to the world
    Body groundBody = world.createBody(groundBodyDef);

    for (int i = 0; i < 1000; i++) {
        // Create our line
        EdgeShape ground = new EdgeShape();
        ground.set(x1,y1,x2,y2);
        groundBody.createFixture(ground,0.0f);
        ground.dispose();
    }

Connect each line to your body:

// Create our body deFinition
    BodyDef groundBodyDef = new BodyDef();
    groundBodyDef.type = BodyType.StaticBody;

    for (int i = 0; i < 1000; i++) {
        // Create a body from the defintion and add it to the world
        Body groundBody = world.createBody(groundBodyDef);

        // Create our line
        EdgeShape ground = new EdgeShape();
        ground.set(x1,0.0f);
        ground.dispose();
    }

This code example is especially in libgdx, but I imagine this is a fairly basic @ R_ 559_ 2419@2D The concept can be answered even without libgdx experience

An example of a possible functional difference is if all rows are attached to a single principal and we call world destroyBody(groundBody); It will also destroy all rows, but if each row is attached to a different body, we will only destroy one line

Even if it makes a big difference? We can simply call groundbody destroyFixture(fixture); If they are all connected to a single body, destroy a line

Solution

From box2d manual (7.3 body factory):

This is really better Obviously, if you have many bodies with a fixture, you make them a single body, but probably not most games

I would suggest that you use a feature that is easier to implement and can only make it more performance when you really need it