playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
83 lines (82 loc) • 2.49 kB
JavaScript
import { Quat } from "../../../core/math/quat.js";
import { Vec3 } from "../../../core/math/vec3.js";
import { InputController } from "../input.js";
import { damp } from "../math.js";
import { Pose } from "../pose.js";
const dir = new Vec3();
const offset = new Vec3();
const angles = new Vec3();
const rotation = new Quat();
class OrbitController extends InputController {
_targetRootPose = new Pose();
_rootPose = new Pose();
_targetChildPose = new Pose();
_childPose = new Pose();
rotateDamping = 0.98;
moveDamping = 0.98;
zoomDamping = 0.98;
set pitchRange(range) {
this._targetRootPose.pitchRange.copy(range);
this._rootPose.copy(this._targetRootPose.rotate(Vec3.ZERO));
}
get pitchRange() {
return this._targetRootPose.pitchRange;
}
set yawRange(range) {
this._targetRootPose.yawRange.copy(range);
this._rootPose.copy(this._targetRootPose.rotate(Vec3.ZERO));
}
get yawRange() {
return this._targetRootPose.yawRange;
}
set zoomRange(range) {
this._targetChildPose.zRange.copy(range);
this._childPose.copy(this._targetChildPose.move(Vec3.ZERO));
}
get zoomRange() {
return this._targetRootPose.zRange;
}
attach(pose, smooth = true) {
this._targetRootPose.set(pose.getFocus(dir), pose.angles, 0);
this._targetChildPose.position.set(0, 0, pose.distance);
if (!smooth) {
this._rootPose.copy(this._targetRootPose);
this._childPose.copy(this._targetChildPose);
}
}
detach() {
this._targetRootPose.copy(this._rootPose);
this._targetChildPose.copy(this._childPose);
}
update(frame, dt) {
const { move, rotate } = frame.read();
offset.set(move[0], move[1], 0);
rotation.setFromEulerAngles(this._rootPose.angles).transformVector(offset, offset);
this._targetRootPose.move(offset);
const { z: dist } = this._targetChildPose.position;
this._targetChildPose.move(offset.set(0, 0, dist * (1 + move[2]) - dist));
this._targetRootPose.rotate(angles.set(-rotate[1], -rotate[0], 0));
this._rootPose.lerp(
this._rootPose,
this._targetRootPose,
damp(this.moveDamping, dt),
damp(this.rotateDamping, dt),
1
);
this._childPose.lerp(
this._childPose,
this._targetChildPose,
damp(this.zoomDamping, dt),
1,
1
);
rotation.setFromEulerAngles(this._rootPose.angles).transformVector(this._childPose.position, offset).add(this._rootPose.position);
return this._pose.set(offset, this._rootPose.angles, this._childPose.position.z);
}
destroy() {
this.detach();
}
}
export {
OrbitController
};