语法：

skeleton_animation_get_duration(animname);

参数	描述
animname	The name (a string) of the animation set to use.

返回：

Real（实数）

描述

This function will return the time required for the given animation set to run before looping back to the beginning. The return value is in seconds.

重要！该函数在试用版（Trial License）产品中不可用。

Example1:

time += delta_time / 1000000;
var duration = skeleton_animation_get_duration(skeleton_animation_get());
var frame = floor((image_number * (mTime / duration)) + 0.5) % image_number;
image_index = frame;
draw_self();

The above code will set the image_index to the correct value for the currently assigned skeletal animation sprite.

Example2:

time += delta_time / 1000000;
var d = skeleton_animation_get_duration("walk");
if time > d time -= d;
draw_skeleton_time(sprite_index, "walk", "skin1", time, x, y, image_xscale, image_yscale, image_angle, c_white);

The above code will draw the given skeletal animation sprite using delta-time to set the frame being drawn.