Sample of falling coins by physics

[cx20]

I made a sample of falling coins in Babylon.js.
Coins created with PBR materials are displayed neatly.

Babylon.js Playground

[mawa]

Can you please make it so that they would fall in my wallet

[Deltakosh]

If you tweet about it let me know we will retweet it frombjs account

This is gold

[cx20]

Thanks! Here is my tweet.

cx20

[cx20]

Havok physics seems to allow more coins to fall.

cx20

[CodingCrusader]

To enjoy the surface materials and the feeling that money flows into my direction, I modified your example a bit

Test of falling Coins with physics | Babylon.js Playground (babylonjs.com)

[carolhmj]

@CodingCrusader

and the feeling that money flows into my direction

The feeling should be even better in XR! through the coins make me think more of those delicious chocolate coins…

[cx20]

I changed the coin into chocolate.
Unfortunately it didn’t look as authentic as the coin. Anyone know a technique to make chocolate look real?

Babylon.js Playground

[CodingCrusader]

@cx20 when i saw this example on my vr glasses i had to think of your gold rush demo. i am about to write the mentioned example in babylon but maybe you beat me to it. Unfortunately, to get into the enjoyment of the sham slingshot you need a vr controller: you hold in your hand bills that you can scatter around you. super cool feeling!

three.js vr - make it rain

[cx20]

Unfortunately I don’t have vr glasses right now, so I don’t think I’ll port the three.js vr sample.

Speaking of which, if you ask ChatGPT GPT-4, they might be able to help you port from three.js to Babylon.js.

[cx20]

I impulsively wanted to try the ChatGPT port. Below is the result of porting.

Babylon.js Playground

VR feature is not built in (because I am not familiar with Babylon.js VR function)

[CodingCrusader]

Almost correct but I need an impulse upwards.

This example has still wrong impulse but it shows the right smooth behavour.
Babylon.js - make it rain | Babylon.js Playground (babylonjs.com)

This is what I want have:
Euro Geldschein Pistole selber bauen Geld werfer basteln aus Pappe - cardboard dollar money gun DIY - YouTube

… and nice to have: a flexible paper simulation

… and my money should stay on the ground, please

[cx20]

Fixed it a little. I think that changing CreatePlane to CreateBox solved the transparent problem.

Babylon.js Playground

[CodingCrusader]

Thank you, I can re-run the example all day long!

[cx20]

Perhaps if we start using Havok, we will be able to increase the number of bills.

[cx20]

BTW, I’ve noticed a problem with how coins are recycled after they fall below the ground. I think it could have been improved by:

Babylon.js Playground

/*
    mesh.position = getNextPosition(50);
    mesh.aggregate = new BABYLON.PhysicsAggregate(mesh, BABYLON.PhysicsShapeType.CYLINDER, { mass: 1, friction:0.4, restitution:0.8 }, scene);
*/
    // Improved performance by referring to:
    // https://doc.babylonjs.com/features/featuresDeepDive/physics/perfTips

    const body = mesh.aggregate.body;
    const pos = getNextPosition(50);

    body.disablePreStep = false;
    body.transformNode.position.set(pos.x, pos.y, pos.z);
    body.setLinearVelocity(new BABYLON.Vector3(0,0,0));
    body.setAngularVelocity(new BABYLON.Vector3(0,0,0));

[mawa]

@cx20

Anyone know a technique to make chocolate look real?

Sure. Just change your prompt of ‘material = chocolate’ to ‘material = swisschocolate’
It’s just a matter of having the right quantity of sugar, good quality milk and nicely roasted cocoa beans

Don’t ask for the recipe; It’s secret

[cx20]

I think I got closer to the chocolate material thanks to your advice.

Babylon.js Playground

[mawa]

It was essentially a joke . I only took two minutes twisting a few things in the materials.
I believe to make a realistic chocolate texture would require to create either a detail or clearcoat texture similar to a ‘rubber-like’ design. Choc is rarely just completely flat. It’s a liquid turned into solid and it does catch some of the light and env. It needs to look a bit more ‘organic’.

[cx20]

I might have gotten another chocolate ball while trying the clear coat.

Babylon.js Playground