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Make Quat.fromAngleAxis well behaved

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RGBCube 2023-12-19 16:54:17 +03:00
parent d42b67f25e
commit aeb47bff9c
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1 changed files with 16 additions and 3 deletions
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19
cube.js
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@ -16,6 +16,12 @@ class Vec3 {
return Math.sqrt(this.x ** 2 + this.y ** 2 + this.z ** 2);
}
scale(factor) {
this.x *= factor;
this.y *= factor;
this.z *= factor;
}
normalize() {
const length = this.length();
@ -43,7 +49,8 @@ class Quat {
this.w = w;
}
static fromAngleAxis(angle, axis) {
static fromAxis(axis) {
const angle = axis.length();
axis.normalize();
const half = angle / 2;
@ -120,7 +127,10 @@ const orientation = {
mouse.lastMove = window.performance.now();
const axis = new Vec3(-delta.y, delta.x, 0);
const rotation = Quat.fromAngleAxis(delta.length() * sensitivity, axis);
axis.normalize();
axis.scale(delta.length() * sensitivity);
const rotation = Quat.fromAxis(axis);
orientation.set(Quat.mul(rotation, orientation.get()));
};
@ -177,7 +187,10 @@ const orientation = {
angularMomentum.z = 0;
}
const rotation = Quat.fromAngleAxis(theta, axis);
axis.normalize();
axis.scale(theta);
const rotation = Quat.fromAxis(theta);
if (!mouse.down) orientation.set(Quat.mul(rotation, orientation.get()));