How to use lerpAngle?

Help & Support
1

How to use lerpAngle? Looks like I’m doing sth wrong I want to lerp angle from 0 to 180 degrees on press key left or right

 update(dt) {
        const left = pc.app.keyboard.wasPressed(pc.KEY_LEFT);
        const right = pc.app.keyboard.wasPressed(pc.KEY_RIGHT);

        this.rotate(left, right);
    }
    rotate(left, right) {
        const height = 1;
        const distance = 4;

        const lookAtPointPos = this.lookAtPoint.getPosition();

        orbitAngle = pc.math.lerpAngle(orbitAngle, 180, 0.5);

        this.entity.setLocalPosition(lookAtPointPos);
        this.entity.setEulerAngles(0, orbitAngle, 0);
        this.entity.translateLocal(0, height, distance);
        this.entity.lookAt(lookAtPointPos);

        if(left){
            orbitAngle -= 180;
        }
        if(right){
            orbitAngle += 180;
        }

    }
2

Hi @grzesiekmq,

pc.math.lerpAngle will lerp between 0-360 and the arguments that you pass are:

  • from
  • to
  • alpha

So a way to smoothly go from 0 to 180 is (example code):

MyScript.prototype.initialize = function(){
   this.currentAngle = 0;
   this.targetAngle = 0;
   this.animSpeed = 5;
};

MyScript.prototype.update= function(dt){
   this.currentAngle = pc.math.lerpAngle(this.currentAngle, this.targetAngle, this.animSpeed * dt);
};
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