Adjusting size / Animating Sprite entity

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Re: Adjusting size / Animating Sprite entity [Re: Alan] #260546
04/11/09 21:50 04/11/09 21:50

Joined: Feb 2008
Posts: 3,232
Australia

EvilSOB

Expert

EvilSOB

Expert

Joined: Feb 2008
Posts: 3,232
Australia

just convert my code to like c-script. "Here's one I prepared earlier..."

Code:

   
   // set the initial size equal to 10% of the original size
   my.scale_x = 0.1;	my.scale_y = my.scale_x;
   
   // increase the sprite's size
   var c=0; while(c<15)      //15 is number of frames, change in all parts of loop if changing.
   {  my.scale_x += (1.0)/15;	my.scale_y = my.scale_x;
      c += 1;     wait(1); 					}
   my.scale_x = 1;	my.scale_y = my.scale_x;   //*optional* set to exactly full size

   //decrease the sprite's size (at a slower rate than it was increased previously)
   c=0; while(c<30)      //15 is number of frames, change in all parts of loop if changing.
   {  my.scale_x -= (1.0)/30;	my.scale_y = my.scale_x;
      c += 1;     wait(1); 					}
   my.scale_x = 0.1;	my.scale_y = my.scale_x;   //*optional* set to exactly initial size
 
   wait(3);
   ent_remove(me);

"There is no fate but what WE make." - CEO Cyberdyne Systems Corp.
A8.30.5 Commercial

Re: Adjusting size / Animating Sprite entity [Re: EvilSOB] #260579 04/12/09 08:31 04/12/09 08:31
Joined: Oct 2007 Posts: 306 Austria A Alan OP Senior Member
Alan OP Senior Member A Joined: Oct 2007 Posts: 306 Austria	Hi, I just executed the program with your code - in the beginning I didn't see much difference in effect compared to my original code. The result still looked like this: http://www.letsshareit.net/files/5/ring_2.bmp Then I suddenly remembered that 15 frames (at 24 frames per second or even more) are less than one second display-time. So I increased the values a bit (100 frames for the increase-animation, 200 for the decrease-animation) - things already looked better, but still not quite what I wanted it to look like. After checking my code once again, this time knowing exactly that the animation-part itself was free of errors, I wondered whether the problems were caused by the function which actually calls the entire ring-function. So I exchanged that procedure so that a ring would appear every time I hit the "R"-Key on my keyboard - and that did it. My function just called the rings over and over again, WAY TOO FAST. The action for my ball which serves as a kind of a "source" for the rings looked like this: Code: var ring_count = 0; function create_ring() { // your animation code is placed here along with some initialisation stuff } action ball_action() [...] ring_count += 1; if ring_count = 10 { create_ring(); ring_count = 0; } [..] wait(1); So a new ring was created every 10 frames. The result looked "laggy" but actually it was not slow but WAY too fast. Problem solved, I think I can handle the rest (correcting the procedure which calls the ring_create) by myself. Big thanx, EvilSOB! You really helped me out on this one! Greetz! Alan

Re: Adjusting size / Animating Sprite entity [Re: Alan] #260583 04/12/09 08:56 04/12/09 08:56
Joined: Feb 2008 Posts: 3,232 Australia EvilSOB Expert
EvilSOB Expert Joined: Feb 2008 Posts: 3,232 Australia	No problem. Glad I could help. Just one suggestion before I go if you dont object, I would be inclined to use time_step instead of just '1' in your ring-count. Code: ring_count += time_step; if(ring_count >= 10) //probably need to find a new number for this though This is because time_step auto-smooths timing issues relating to frame rates. By using time_step, if the frame-rate drops, you'll still get X number of rings per second, because the time_step changes size according to the approximate frame-rate. But if you use just +1, then if the frame-rate drops, you'll get less rings per second, because the +1 action doesnt get run as many times a second. See what I mean? "There is no fate but what WE make." - CEO Cyberdyne Systems Corp. A8.30.5 Commercial

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