Hi everyone,

First of all I apologize for every english mistakes I made : my english is not fluent!


My problem is the following : I'm developing a P3D video-game with a GTA 1 (or 2) like graphics, recently I tried to add some Trees in my map using 3 or 4 QUAD shaped layers in different z pos. These shapes has differents texture and they are just simple "big" squares=> 500*500.

My app size is 800*600 and my camera's z position is 1500.

Before these trees my FPS was up to 60 at all times, and now when there is 2 trees on my screen (so max. 8 layers of 500*500 textured QUAD shapes) my FPS goes down to like 40 and when I use a less powerfull computer it goes down to 20 FPS~~.


I just don't understand because it's just 8 textured squares, and in my map there is like 20 houses which are for some 750*500*750 3d CUBES! More than 5 cubes can be drawn on the scene without a little FPS loss...

Maybe I'm doing something wrong when drawing those shapes ?! :

1. 
   class tree implements mapObject
   {
     float x,y;
     int type = 1;
     float h;
     int mySize = 50;
     PImage tex1;
     PImage tex2;
     PImage tex3;
     PImage tex4;
    
    
     tree(float _x, float _y, float _h, int _type, int _size)
     {
       x=_x;
       y=_y;
       h=_h;
       type=_type;
       mySize = _size;
       setText();
     }
    
     // There is 4 different type of Trees (with differents textures) so we change the textures depending on the type
     void setText()
     {
       if (type == 1)
       {
          tex1=treeTex.get(0);
          tex2=treeTex.get(2);
          tex3=treeTex.get(3);
          tex4=treeTex.get(1);
       }
       else if (type == 2)
       {
          tex1=treeTex.get(4);
          tex2=treeTex.get(5);
          tex3=treeTex.get(6);
       }
       else if (type == 3)
       {
          tex3=treeTex.get(7);
          tex1=treeTex.get(8);
          tex4=treeTex.get(9);
       }
       else if (type == 4)
       {
          tex1=treeTex.get(10);
          tex4=treeTex.get(11);
          tex3=treeTex.get(12);
       }
       else
       {
          tex1=treeTex.get(0);
          tex2=treeTex.get(2);
          tex3=treeTex.get(3);
          tex4=treeTex.get(1);
       }
     }
     void draw()
     {
      
       // when not on the screen, Tree are not draw
       if(screenX(x,y,0)>-3 && screenX(x,y,0)<width+3 && screenY(x,y,0)>-3 && screenY(x,y,0)<height+3);
       else if(screenX(x+mySize,y,0)>-3 && screenX(x+mySize,y,0)<width+3 && screenY(x+mySize,y,0)>-3 && screenY(x+mySize,y,0)<height+3);
       else if(screenX(x,y+mySize,0)>-3 && screenX(x,y+mySize,0)<width+3 && screenY(x,y+mySize,0)>-3 && screenY(x,y+mySize,0)<height+3);
       else if(screenX(x+mySize,y+mySize,0)>-3 && screenX(x+mySize,y+mySize,0)<width+3 && screenY(x+mySize,y+mySize,0)>-3 && screenY(x+mySize,y+mySize,0)<height+3);
       else
       {
         return;
       }
       noStroke();
       noFill();
       // Tree's trunk (2 quads)
       beginShape(QUADS);
       {
         vertex(x-10,y,0);
         vertex(x+10,y,0);
         vertex(x+10,y,h);
         vertex(x-10,y,h);
         vertex(x,y-10,0);
         vertex(x,y+10,0);
         vertex(x,y+10,h);
         vertex(x,y-10,h);
       }
       endShape();
       // First layer
       if (tex1 != null)
       {
         beginShape(QUADS);
         {
           texture(tex1);
           vertex(x-mySize,y-mySize,h,0,0);
           vertex(x+mySize,y-mySize,h,tex1.width,0);
           vertex(x+mySize,y+mySize,h,tex1.width,tex1.height);
           vertex(x-mySize,y+mySize,h,0,tex1.height);
         }
         endShape();
       }
       // Second layer
       if (tex2 != null)
       {
         beginShape(QUADS);
         {
           texture(tex2);
           vertex(x-mySize,y-mySize,h-60,0,0);
           vertex(x+mySize,y-mySize,h-60,tex2.width,0);
           vertex(x+mySize,y+mySize,h-60,tex2.width,tex2.height);
           vertex(x-mySize,y+mySize,h-60,0,tex2.height);
         }
         endShape();
       }
       // Third layer
       if (tex3 != null)
       {
         beginShape(QUADS);
         {
           texture(tex3);
           vertex(x-mySize,y-mySize,h+10,0,0);
           vertex(x+mySize,y-mySize,h+10,tex3.width,0);
           vertex(x+mySize,y+mySize,h+10,tex3.width,tex3.height);
           vertex(x-mySize,y+mySize,h+10,0,tex3.height);
         }
         endShape();
       }
       // Fourth layer
       if (tex4 != null)
       {
         beginShape(QUADS);
         {
           texture(tex4);
           vertex(x-mySize,y-mySize,h-30,0,0);
           vertex(x+mySize,y-mySize,h-30,tex4.width,0);
           vertex(x+mySize,y+mySize,h-30,tex4.width,tex4.height);
           vertex(x-mySize,y+mySize,h-30,0,tex4.height);
         }
         endShape();
       }
     }
    
   }
   

1. 
       tree(315,2870,250,2,250);
       tree(840,3185,210,3,200);
   

The thing is when I set the camera's z position to 3000 or 4000 (two times higher) there is no more FPS loss, we can see the whole map with all trees w/o any loss....

I really don't understand why there is this loss... It's just 4 damn 2D squares !

I also trid to change the texture to something with the exact size of the squares (500*500) so the app won't resize it, but no changes (I even tried to change the texture to something simply black, because my original textures are PNG with a lot of transparency, no changes)


Thank you for your help!