Android opengles animated text logic? -

i have gotten text render using opengl es on android , trying find out how "animate" in pokemon games "reveals" characters left right @ speed. how done?

basically, "text-sliding-in" other animations.

for example, @ sample code:

public class gameobject {     // each element in char array contains     // single character, representing serie of text.     private char[] mtext;     // frames before new character appears.     private int mframes;             // current frame.     private int mcurrentframe;     // current index (which character last).     private int mindex;      public gameobject(string defaulttext, int framespercharacter) {         final int textlength = defaulttext.length();         mtext = new char[textlength];          (int x = 0; x < textlength; x++) {             mtext[x] = defaulttext.charat(x);         }          mframes = framespercharacter;     }      public void drawtext() {         // not have room enough explain drawing apis,          // you'll idea.         (int x = 0; x < mindex; x++) {             // draw text, beginning current index.             // depending on drawing api, might have             // change x , y coordinates each character.             apidrawtext.drawtext(mtext[x]);         }          // reset counter if character's "animation"         // done , add 1 index.          // otherwise, add 1 current frame.         if (mcurrentframe >= mframes) { mcurrentframe = 0; mindex++; }         else { mcurrentframe++; }          if (mindex >= mtext.length) {             // reset index counter (will display text on again).             mindex = 0;         }     } } 

notice game object class has more fields describing them, example purposes should enough.

/**  * basic opengl es implementation on android.  * should contain onsurfacecreated() , onsurfacechanged().  */ public class glrenderer extends glsurfaceview implements renderer {     private gameobject mgameobject;      public glrenderer() {          // add default text , add 25 frames per character.         mgameobject = new gameobject("default text!", 25);     }      /**      * ordinary draw function on android. code should      * similiar this.      */     @override     public void ondrawframe(gl10 gl) {         // use method got render text opengl         // here.         mgameobject.drawtext();              } } 

well, happens? summarize:

first frame: d <- increase mcurrentframe one.

second frame: d <- increase mcurrentframe one.

...

twenty-sixth frame: de <- mindex has increased 1 (it loop through mtext variable 2 times).

...

all text has been displayed: <- reset mindex zero, reset mcurrentframe zero. play animation beginning.

this basic idea. can add more methods change frames per character amount, change text, slow/speed animation after each character, etc.

i wrote example of this, canvas system. should easy adapt whatever choose.

you can find example here.