GeometryDash3D/js/utils.js

export const textureGradient = (width, height, color1, color2) => {
    const cnv = document.createElement("canvas");

    const ctx = cnv.getContext("2d");
    ctx.rect(0, 0, cnv.width, cnv.height);

    const gradient = ctx.createLinearGradient(0, 0, width / 4, 15 * height);
    gradient.addColorStop(0, color1);
    gradient.addColorStop(1, color2);

    ctx.fillStyle = gradient;
    ctx.fill();

    const texture = new THREE.Texture(cnv);
    texture.needsUpdate = true;

    return texture;
};

export class Rotation {
    constructor(position) {
        this.default = position.clone();
        this.state = false;
        this.rotation = 0;
        this.jump = 0;

        this.rotationVelocity = 0.03;
        this.jumpVelocity = 0.06;

        this.lastJump = 0;
    }

    /**
     * Change the state of the animation and update the latest jump time
     * @param {number} time
     */
    changeState = (time) => {
        this.state = !this.state;
        if (time) {
            this.lastJump = time;
        }
    };

    /**
     * Change the final rotation
     * @param {number} rotation
     */
    changeRotation = (rotation) => {
        this.rotation = rotation;
    };

    /**
     * Change the final position
     * @param {number} jump
     */
    changeJump = (jump) => {
        this.jump = jump;
    };

    /**
     * Return the state of the jump
     * @returns boolean representing if the object is going up or down
     */
    falling = () => {
        return this.jump == this.default.y;
    };
}