schteppe
commented
8 years ago I've tried a few hacks to stop a dynamic character controller from gliding in slopes. But it's pretty tricky and I haven't found a good solution for it yet.
One approach is to add more friction... But since friction is a velocity constraint and not a position constraint, the character will always glide a little depending on the scene. You'll also have to add more force/velocity when you want the character to walk.
Another approach is to change the linearFactor in the x/z directions to 0 when stopping. This will make it impossible to move the character in the walking directions.
A dynamic character controller will always have some flaws. If you aim for a character controller found in games, you really want a Kinematic Character controller. In many implementations, it uses some form of raycasting to find where the ground is, and then just places the character there. This far, I haven't found any implementations in JavaScript. But I started making a 2D implementation for p2.js.
And btw.. the velocity will probably never be exact zero, due to the way Cannon works.
digitaledge
Hello again,
finally i finished some character controller using cannon.js. Problem is that i cant get the character to stop sliding on the heightfield.
I did add a contactmaterial like in the given example:
this.playerMaterial_cm = new CANNON.ContactMaterial(this.playerMaterial, this.playerMaterial, { friction: 0.6, restitution: 0.1, contactEquationStiffness: 1e8, contactEquationRelaxation: 3, frictionEquationStiffness: 1e8, frictionEquationRegularizationTime: 3 });this.playerMaterial is used for the heightfield and player body.
My world settings is:
this.world.gravity = new CANNON.Vec3(0, -9.8, 0); this.world.broadphase = new CANNON.NaiveBroadphase(); this.world.solver.iterations = 20; this.world.solver.tolerance = 0;The player body has a mass of 5. When its set like this.body.velocity.set(0, this.body.velocity.y, 0), velocity.y is never zero.
Any idea what i am missing?
Regards Stefan