我如何使用图像的长度/宽度。 我需要在第二个drawImage中指定它以在图像结束时重复图像。获取真实图像的长度Javascript
function Background() {
this.speed = 2; // Redefine speed of the background for panning
// Implement abstract function
this.draw = function() {
// Pan background
// this.x -= this.speed;
this.context.drawImage(imageRepository.background, this.x, this.y);
this.x -= this.speed;
// Draw another image at the top edge of the first image
this.context.drawImage(imageRepository.background, this.x, this.y);
// // If the image scrolled off the screen, reset
// if (this.x <= -this.background.naturalWidth) this.x = 0;
};
}
当然似乎没有太多的研究进入这个 – charlietfl