cannon-es-debugger
v1.0.0
Published
Wireframe debugger for use with cannon-es https://github.com/pmndrs/cannon-es
Downloads
40,929
Readme
cannon-es-debugger
This is a debugger for use with cannon-es. It was adapted from the original cannon.js debugger written by Stefan Hedman @schteppe.
Note: This debugger is included in use-cannon directly.
Installation
yarn add cannon-es-debugger
Make sure you also have three
and cannon-es
as dependencies.
yarn add three cannon-es
Usage
Give cannon-es-debugger
references to your three.js scene object and cannon-es world:
import { Scene } from 'three'
import { World } from 'cannon-es'
import CannonDebugger from 'cannon-es-debugger'
const scene = new Scene()
const world = new World()
const cannonDebugger = new CannonDebugger(scene, world, {
// options...
})
// ...
function animate() {
requestAnimationFrame(animate)
world.step(timeStep) // Update cannon-es physics
cannonDebugger.update() // Update the CannonDebugger meshes
renderer.render(scene, camera) // Render the three.js scene
}
animate()
New meshes with wireframe material will be generated from your physics body shapes and added into the scene. The position of the meshes will be synched with the Cannon physics body simulation on every animation frame.
API
import type { Scene, Color } from 'three'
import type { Body } from 'cannon-es'
type DebugOptions = {
color?: string | number | Color
scale?: number
onInit?: (body: Body, mesh: Mesh, shape: Shape) => void
onUpdate?: (body: Body, mesh: Mesh, shape: Shape) => void
}
export default class CannonDebugger {
constructor(scene: Scene, world: World, options: DebugOptions): void
update(): void
}
The available properties of the options
object are:
color
- a Three Color argument that sets the wireframe color, defaults to0x00ff00
scale
- scale factor for all the wireframe meshes, defaults to 1onInit
- callback function that runs once, right after a new wireframe mesh is addedonUpdate
- callback function that runs on every subsequent animation frame
The update()
method needs to be called in a requestAnimationFrame
loop to keep updating the wireframe meshes after the bodies have been updated.