If you have performance critical code like this, you may want to consider using the NDK as discussed in android-ndk.
On Tue, May 19, 2009 at 8:44 AM, jeanguy <[email protected]> wrote: > > Since you're targeting the G1, I will dispute this. In my tests fixed > point was negligibly faster than softfp. This is because there is no > JIT nor JNI support, and hence no support for hardware int math. > Softint is not all that faster than softfp. See the last post in this > thread: > > > http://groups.google.com/group/android-developers/browse_thread/thread/60e00ab2de9abb2d/a2b214c80085bfbf?lnk=gst&q=integer+performance#a2b214c80085bfbf > > After doing the necessary extra calculations to perform fixed point > math (all the bit shifts, etc.) I found not much of an advantage of > fixed point over softfp. > > Not good news, I realize, but hopefully I can save you some time. > > On May 18, 10:18 pm, Dianne Hackborn <[email protected]> wrote: > > Yes fixed point is highly recommended. > > > > > > > > On Mon, May 18, 2009 at 9:26 PM, Robert Green <[email protected]> > wrote: > > > > > I guess I'm thinking about all of the floating point vector and matrix > > > math I had dealt with in the last FPS game I worked on. It did seem > > > like the game itself, for the physics, collision detection, fx and > > > scene rendering used almost all floats (Torque game engine in 2005). > > > I suppose it would be possible to do that all with fixed point, which > > > is what I'm planning on doing for my upcoming 3D Android game. > > > > > Is that what you recommend doing? > > > > > On May 18, 6:32 pm, Dianne Hackborn <[email protected]> wrote: > > > > On Mon, May 18, 2009 at 3:18 PM, Robert Green <[email protected]> > > > wrote: > > > > > Understood. I was more speaking to the G1 specifically, not > Android. > > > > > The 8 megatexel GPU with no floating point on the CPU to be able to > > > > > support it confuses me. > > > > > > You don't need floating point to make good use of the GPU. > > > > > > -- > > > > Dianne Hackborn > > > > Android framework engineer > > > > [email protected] > > > > > > Note: please don't send private questions to me, as I don't have time > to > > > > provide private support, and so won't reply to such e-mails. All > such > > > > questions should be posted on public forums, where I and others can > see > > > and > > > > answer them. > > > > -- > > Dianne Hackborn > > Android framework engineer > > [email protected] > > > > Note: please don't send private questions to me, as I don't have time to > > provide private support, and so won't reply to such e-mails. All such > > questions should be posted on public forums, where I and others can see > and > > answer them. > > > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
