@visactor/vrender-animate/es/custom/sphere.js

This module provides a graph-based animation system for VRender.

import { pi, pi2 } from "@visactor/vutils";

import { ACustomAnimate } from "./custom-animate";

import { applyAnimationFrameAttributes } from "./transient";

export class RotateBySphereAnimate extends ACustomAnimate {
    onBind() {
        super.onBind(), this.propKeys = [ "x", "y", "z", "alpha", "zIndex" ];
    }
    onFirstRun() {
        super.onFirstRun(), this.target.applyFinalAttributeToAttribute();
    }
    onStart() {
        var _a, _b;
        super.onStart();
        const {center: center, r: r} = "function" == typeof this.params ? this.params() : this.params, source = null !== (_a = this.target.getFinalAttribute()) && void 0 !== _a ? _a : this.target.attribute, startX = source.x, startY = source.y, startZ = null !== (_b = source.z) && void 0 !== _b ? _b : 0, phi = Math.acos((startY - center.y) / r);
        let theta = Math.acos((startX - center.x) / r / Math.sin(phi));
        startZ - center.z < 0 && (theta = pi2 - theta), this.theta = theta, this.phi = phi;
    }
    onEnd() {}
    onUpdate(end, ratio, out) {
        if (null == this.phi || null == this.theta) return;
        const {center: center, r: r, cb: cb} = "function" == typeof this.params ? this.params() : this.params, deltaAngle = 2 * Math.PI * ratio, theta = this.theta + deltaAngle, phi = this.phi, x = r * Math.sin(phi) * Math.cos(theta) + center.x, y = r * Math.cos(phi) + center.y, z = r * Math.sin(phi) * Math.sin(theta) + center.z;
        let alpha = theta + pi / 2;
        for (;alpha > pi2; ) alpha -= pi2;
        alpha = pi2 - alpha, applyAnimationFrameAttributes(this.target, {
            x: x,
            y: y,
            z: z,
            alpha: alpha,
            zIndex: -1e4 * z
        }), this.target.addUpdatePositionTag(), this.target.addUpdateShapeAndBoundsTag(), 
        cb && cb(out);
    }
}
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