xwdev的专栏

<br />1.Distance Between Two Points 两点间的距离dx = x2 – x1; dy = y2 – y1; dist = Math.sqrt(dx*dx + dy*dy);<br />2. Inching Formulas 缓动公式sprite.x+= (targetX - sprite.x)* easing;//easing: inching coefficient sprite.y+= (targetY - sprite.y)* easing;<br />3. El