The test(not my code) just hold a Texture array ( one background and
the others are spirits).
Every frame render the background with fullscreen and move the spirit.
The following codes in GLSpirit.java do the actually draw.
public void draw(GL10 gl) {
gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureName);
if (mGrid == null) {
// Draw using the DrawTexture extension.
((GL11Ext) gl).glDrawTexfOES(x, y, z, width, height);
} else {
// Draw using verts or VBO verts.
gl.glPushMatrix();
gl.glLoadIdentity();
gl.glTranslatef(
x,
y,
z);
mGrid.draw(gl, true, false);
gl.glPopMatrix();
}
}
To be honest I don't familiar opengl. Could you tell me the trick to
get pixel-perfect drawing? I want my game support different screen
resolution.
And what's your device?
You make me an impressive about " multitexturing, particle effects,
shadows, parallax scrolling backgrounds, lots of dynamic text and on-
screen controls.", and I just want to embedded them into my small
engine.
What's the version of opengl for them?
On Apr 14, 3:45 am, Robert Green <[email protected]> wrote:
> It's going to depend on more factors than number of sprites. GPUs are
> usually fill-bound and so the functions you use to filter and blend
> have a large impact on performance. What does your test do? Does it
> distribute small quads all over the screen like particle effects do?
> Are the quads blended? I was assuming they are. What filtering modes
> are you using? Are you drawing pixel-perfect or transforming? I
> think there are tricks in OpenGL to draw at 1.5,1.5 instead of 1.0,1.0
> to get pixel-perfect drawing, which may be more efficient because the
> texture unit will only have one pixel to read off the texture instead
> of multiple, or so I think, but am not sure.
>
> I use OpenGL for 2D and get adequate performance on all hardware-
> accelerated devices. I'm using multitexturing, particle effects,
> shadows, parallax scrolling backgrounds, lots of dynamic text and on-
> screen controls.
>
> On Apr 6, 12:12 am, lixin China <[email protected]> wrote:
>
>
>
> > I'm preparing code a game.
> > So I need benchmark the OpenGL find a good way render my 2d stuffs.
>
> > And I found a project have done
> > that.http://code.google.com/p/apps-for-android/
> > SpriteMethodTest
>
> > I only have nexus one. The following it's the test result from my
> > phone.
> > ========================================
> > test 1: 10 Sprites without animate
> > Canvas: 142.85 fps
> > OpenGL 1: 34.48 fps
> > OpenGL 2: 33.33 fps
> > OpenGL 3: 33.33 fps
>
> > test 2： 10 Sprites with animate
> > Canvas: 90 fps
> > OpenGL 1: 32 fps
> > OpenGL 2: 33 fps
> > OpenGL 3: 32 fps
>
> > ========================================
> > test 3： 100 Sprites without animate
> > Canvas: 111 fps
> > OpenGL 1: 43.47 fps
> > OpenGL 2: 43.47 fps
> > OpenGL 3: 41.66 fps
> > test 4： 100 Sprites with animate
> > Canvas: 62.5 fps
> > OpenGL 1: 45 fps
> > OpenGL 2: 43 fps
> > OpenGL 3: 45 fps
> > =======================================
> > test 5： 500 Sprites without animate
> > Canvas: 27 fps
> > OpenGL 1:20 fps
> > OpenGL 2:23.8 fps
> > OpenGL 3:23.8 fps
> > test 6： 500 Sprites with animate
> > Canvas: 25 fps
> > OpenGL 1: 20 fps
> > OpenGL 2: 23 fps
> > OpenGL 3: 22 fps
> > =======================================
> > test 7： 1000 Sprites without animate
> > Canvas: 15.38 fps
> > OpenGL 1: 10.5 fps
> > OpenGL 2: 12.82 fps
> > OpenGL 3: 14.7 fps
> > test 8： 1000 Sprites with animate
> > Canvas: 15.15 fps
> > OpenGL 1: 10.3 fps
> > OpenGL 2: 12.65 fps
> > OpenGL 3: 14.28 fps
>
> > ==================================
>
> > The result observably show that the rendering performance on nexus
> > one, Canvas faster than OpenGL way.
> > Why? Did anybody test it on the other device?
>
> > And another question.
> > I write a test application just render a background and a moving
> > sprite with draw_texture extension.
> > And use Rokon (which is a 2D game engine) do the same thing.
> > And test device of course its my nexus one.
>
> > Rokon got 60fps and my app just 55fps in average.
> > It was weird because I saw a video on Google I/O Session about how to
> > write a real-time game（http://www.youtube.com/watch?v=U4Bk5rmIpic.
> > Video shows that draw_texture have better performance that the usual
> > way.
> > Somebody knew the reason?
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