[
          this.posVec[0] + this.vel[0],
          this.posVec[1] + this.vel[1],
          this.posVec[2] + this.vel[2],
        ];
        const x = this.posVec[0] / this.posVec[2];
        const y = this.posVec[1] / this.posVec[2];
        const x2 = this.posVec[0] / (this.posVec[2] + speed);
        const y2 = this.posVec[1] / (this.posVec[2] + speed);

        ctx.strokeStyle = this.color;
        ctx.beginPath();
        ctx.moveTo(x, y);
        ctx.lineTo(x2, y2);
        ctx.stroke();

        if (