Android Opengl ES tile engine, smooth scrolling

Question

Following this: The best approach to playing the oldschool tree game 2D

I have a simple 2D tile generator that works, im reading an int [100] [100] card filled with 1 or 0 and draw the tiles according to their tile id, 0 is water, 1 grass.

Im using some basic Numpad control handler using camIncr (32.0f), I set the camera position according to the movement:

 case KeyEvent.KEYCODE_DPAD_RIGHT:
 cameraPosX = (float)(cameraPosX + camIncr);
 break;

In my drawing loop im just draw enough tiles to fit on my screen and trace the top left tile using cameraOffsetX and cameraOffsetY (its camera position / tile size)

Im using GLU.gluOrtho2D for my projection.

Here is a drawing loop inside my own renderer:

 gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

  gl.glMatrixMode( GL10.GL_PROJECTION );
  gl.glLoadIdentity( );
  GLU.gluOrtho2D(gl, 0, scrWidth, scrHeight, 0);
  repere.draw(gl, 100.0f); // this is just a helper, draw 2 lines at the origin

  //Call the drawing methods
  gl.glMatrixMode(GL10.GL_MODELVIEW);
  gl.glLoadIdentity();

  tiledBackground.draw(gl, filtering);

my tiledBackground :

  int cols = (569 / 32) + 2;      // how many columns can fit on the screen 
  int rows = (320 / 32) + 1;     // haw many rows can fit on the screen 

  int cameraPosX = (int) Open2DRenderer.getCameraPosX();
  int cameraPosY = (int) Open2DRenderer.getCameraPosY();

  tileOffsetX = (int) (cameraPosX / 32);
  tileOffsetY = (int) (cameraPosY / -32);

  gl.glPushMatrix();

  for (int y = 0; y < rows; y++) {
   for (int x = 0; x < cols; x++) {

    try {
     tile = map[y + tileOffsetY][x + tileOffsetX];
    } catch (Exception e) {
     e.printStackTrace(); //when out of array
     tile = 0;
    }

    gl.glPushMatrix();

    if (tile==0){
     waterTile.draw(gl, filter);
     }

    if (tile==4) {
     grassTile.draw(gl, filter);
     }

    gl.glTranslatef(32.0f, 0.0f, 0.0f);

   }//


   gl.glPopMatrix();
   gl.glTranslatef(0.0f, 32.0f, 0.0f);

  }

  gl.glPopMatrix();

 }

waterTile grassTile.draw 32x32, , .

, numpad, "" , im , , (. android OpenGL ES simple , "" )

, " ". camIncr, GLU.gluOrtho2D .., .

?:)

Answer 1

- .

glTranslatef :

gl.glPushMatrix();

    gl.glTranslatef(-cameraPosX%32, -cameraPosY%32, 0);

    for (int y = 0; y < rows; y++) {
        ...

-, PosX/TILE_HEIGHT, .

, , PosX, Mod (%) .

^^