John Alanbrook
c014f29ce7
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91 lines
2.0 KiB
JavaScript
91 lines
2.0 KiB
JavaScript
var box2d = use('box2d')
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// Create world with constructor
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var world = new box2d.World({gravity: {x: 0, y: -9.8}})
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console.log("Initial gravity:", world.gravity)
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// Create a dynamic body
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var body = world.createBody({
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type: 'dynamic',
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position: {x: 0, y: 10}
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})
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// Add a box shape to the body
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var shape = body.createBoxShape({
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width: 1,
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height: 1,
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density: 1.0,
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friction: 0.3,
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restitution: 0.5
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})
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console.log("Initial position:", body.position)
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console.log("Initial velocity:", body.linearVelocity)
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// Simulate
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world.step(1/60, 4);
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console.log("After 1 step:", body.position)
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world.step(1/60, 4);
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console.log("After 2 steps:", body.position)
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world.step(1/60, 4);
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console.log("After 3 steps:", body.position)
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// Test applying forces
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body.applyForce({x: 100, y: 0})
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world.step(1/60, 4);
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console.log("After force:", body.position, "velocity:", body.linearVelocity)
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// Test properties
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console.log("Body type:", body.type)
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console.log("Body mass:", body.getMass())
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console.log("Body angle:", body.angle)
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// Test string body types
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var staticBody = world.createBody({
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type: 'static',
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position: {x: 0, y: 0}
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})
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console.log("Static body type:", staticBody.type)
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// Test ray casting
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var rayResult = world.rayCast({x: -5, y: 10}, {x: 10, y: 0}, 1.0)
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console.log("Ray cast result:", rayResult)
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// Test distance joint
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var bodyA = world.createBody({
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type: 'dynamic',
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position: {x: -2, y: 5}
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})
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bodyA.createCircleShape({
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radius: 0.5,
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density: 1.0
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})
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var bodyB = world.createBody({
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type: 'dynamic',
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position: {x: 2, y: 5}
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})
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bodyB.createCircleShape({
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radius: 0.5,
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density: 1.0
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})
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var joint = world.createDistanceJoint({
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bodyA: bodyA,
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bodyB: bodyB,
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localAnchorA: {x: 0, y: 0},
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localAnchorB: {x: 0, y: 0},
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length: 4.0
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})
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console.log("Created distance joint")
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// Test multiple steps with joint
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for (var i = 0; i < 10; i++) {
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world.step(1/60, 4)
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}
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console.log("Body A position after joint simulation:", bodyA.position)
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console.log("Body B position after joint simulation:", bodyB.position)
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