Implemented actions widget and editing functionalities

help/files/412_08_example.html

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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+
+<html>
+<head>
+<title>Firework Example</title>
+<link href="style.css" rel="stylesheet" type="text/css">
+</head>
+<body background="images/back.gif">
+<!--START-->
+
+
+<h3>Firework Example</h3>
+
+Here is an example of a particle system that creates fireworks. 
+The firework uses two particle types: one that forms the rocket 
+and one that forms the actual fireworks. The rocket generates 
+the firework particles when it dies. We also generate one 
+emitter in the particle system that regularly stream out rocket 
+particles along the bottom of the screen. To make this work you need an object. 
+In its creation event we place the following code that creates 
+the particle types, particle system, and the emitter:
+
+<p>
+<blockquote>
+<pre>
+{
+  // make the particle system
+  ps = part_system_create();
+
+  // the firework particles
+  pt1 = part_type_create();
+  part_type_shape(pt1,pt_shape_flare);
+  part_type_size(pt1,0.1,0.2,0,0);
+  part_type_speed(pt1,0.5,4,0,0);
+  part_type_direction(pt1,0,360,0,0);
+  part_type_color1(pt1,c_red);
+  part_type_alpha2(pt1,1,0.4);
+  part_type_life(pt1,20,30);
+  part_type_gravity(pt1,0.2,270);
+
+  // the rocket
+  pt2 = part_type_create();
+  part_type_shape(pt2,pt_shape_sphere);
+  part_type_size(pt2,0.2,0.2,0,0);
+  part_type_speed(pt2,10,14,0,0);
+  part_type_direction(pt2,80,100,0,0);
+  part_type_color2(pt2,c_white,c_gray);
+  part_type_life(pt2,30,60);
+  part_type_gravity(pt2,0.2,270);
+  part_type_death(pt2,150,pt1);    // create the firework on death
+
+  // create the emitter
+  em = part_emitter_create(ps);
+  part_emitter_region(ps,em,100,540,480,490,ps_shape_rectangle,ps_distr_linear);
+  part_emitter_stream(ps,em,pt2,-4);   // create one every four steps
+}
+</pre>
+</blockquote>
+
+<p>
+That will do the trick. You might want to make sure the particle system (and maybe particle types) are
+destroyed when moving to another room, otherwise the firework will continue forever.
+
+<!--END-->
+</body>
+</html>