AtomicGameEngine-Examples/PhysicsPlatformer/Resources/Components/Vine.js

// Rope Vine
"atomic component";

var component = function (self) {

var NUM_OBJECTS = 10;

var node = self.node;

node.position = [0, 0, 0];

self.start = function() {

        var x = self.startPosition[0];
        var y = self.startPosition[1];

        // create the node body
        var groundBody = node.createComponent("RigidBody2D");
        groundBody.castShadows = false;

        var prevBody = groundBody;

        for (var i = 0; i < NUM_OBJECTS; i++) {

            var vnode = node.scene.createChild("RigidBody");

            var sprite2D = vnode.createComponent("StaticSprite2D");
            sprite2D.sprite = Atomic.cache.getResource("Sprite2D", "Sprites/vine.png");

            var vbody = vnode.createComponent("RigidBody2D");
            vbody.castShadows = false;
            vbody.bodyType = Atomic.BT_DYNAMIC;

            // Create box
            var vbox = vnode.createComponent("CollisionBox2D");
            // Set friction
            vbox.friction = .2;
            // Set mask bits.
            vbox.maskBits = 0xFFFF & ~0x0002;

            vnode.position = [x + 0.5 + 1.0 * i, y, 0.0];
            vbox.size = [1.0, 0.1];
            vbox.density = 5.0;
            vbox.categoryBits = 0x0001;

            if (i == NUM_OBJECTS - 1)
                vbody.angularDamping = 0.4;

            var joint = vnode.createComponent("ConstraintRevolute2D");
            joint.otherBody = prevBody;
            joint.anchor = [x + i, y];
            joint.collideConnected = false;
            prevBody = vbody;

        }

        var constraintRope = node.createComponent("ConstraintRope2D");
        constraintRope.otherBody = prevBody;
        constraintRope.ownerBodyAnchor = [x, y];
        constraintRope.maxLength = (NUM_OBJECTS + 0.01);


    }

}

exports.component = component;