What is the best way to create a jumping animation for an object in Cannon.js and Three.js?

During my quest for a solution, I came across a common practice where users used cannonBody.velocity.y = JUMP_VELOCITY to make an object jump.

However, in my scenario, this method only worked while the object was already in motion and not when it was stationary. This led me to wonder if there are specific conditions that need to be met for the object to jump successfully.

I am also interested in seeing a demo snippet that demonstrates how to make a simple object (such as a ball) jump when the spacebar is pressed.

javascripttypescriptthree.jscannon.js

Answer №1

After making the switch to OimoPhysics, everything suddenly came to life. Despite using the same conventions as before, the declarative setup for the physics world was a mystery to me. In the past, I have adjusted the config tolerance with Canon, but Oimo's quick setup completely resolved the issue of sleeping bodies. Applying forces instead of setting arbitrary values seemed to provide more consistency and realism. It appears that using applyForce could help avoid potential problems.

One pitfall to watch out for is forgetting to update the physics after moving geometry. If the render loop skips a beat, the geometry could become frozen or detached from its physics body. Introducing a new physics body in place of the original one could also lead to unexpected waking up upon collision with another body. The outcome seems to be dependent on various factors and possibly the version being used...

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