在AfterEffects中实现时钟指针走动效果  

To Achieve the Effect of Clock Pointer to Move Around with After Effects

作　　者：周洁[1] ZHOU Jie （Karamay Vocational ＆Technical college, Karamay 833600,China）

机构地区：[1]克拉玛依职业技术学院,新疆克拉玛依833600

出　　处：《电脑知识与技术》2012年第8期5358-5359,共2页Computer Knowledge and Technology

摘　　要：AfterEffercts提供基于Javascript的优秀表达式工具和函数，使许多平时难以想象的效果的制作有了可能，如文字跳跃、文字雨、3d文字流等等。该文主要利用强大的表达式功能实现时针指针走动的效果，通过100p_out循环表达式来控制层的旋转属性实现了时针指针走动效果，并利用切换保持关键帧命令解决了秒针走一格停一下的问题。对有一些编程基础的人而言，在flash中实现时钟效果要亲自书写代码，而在AfterEffercts就不用输写代码，使用表达式工具库里已有的函数就行，相对而言容易上手。After Effercts provides excellent expression tool and function based on JavaScript, make many usually unimaginable result to pos- sible, such as text jump, text rain, 3D text stream and so on, this paper uses powerful expression function to achieve the effect of clock pointer to move around, they using the expression that loop_out loop to control the rotary property of the layer to achieve the effect of clock pointer to move around, and they using the command that toggle hold key frame to solve the the problem that second hand move a unit and then stop.the pepole who have some basis for the program, must write code personally to achieve the flash clock, with the After Effercts would not to write code, they only use the expression tool library, it is relatively easy to use.

关 键 词：AFTER EFFECTS 时钟 表达式 循环 切换保持关键帧 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论;自动化与计算机技术—计算机科学与技术]