Thank you Jorrit, now it works well.
I thought BeginDraw(..) just tells to draw 3d or 2d in general and not
that what of the following is e.g. 2d will be drawn.
But now it is clear to me.
Have a nice day!
Thomas
Jorrit Tyberghein wrote:
> You should do the sequence as this (pseudo code):
>
> g3d->BeginDraw (3D);
> view->Draw();
> g3d->BeginDraw (2D);
> hud->Draw();
> g3d->FinishDraw();
> g3d->Print(0);
>
> Your code below is violating this order in several ways.
>
> Greetings,
>
> On 2/18/07, Thomas Teufel <[EMAIL PROTECTED]> wrote:
>> Hello,
>> I tried some different ways now, but everytime I cut out g2d->Print(0)
>> the HUD isn't displayed anymore.
>>
>> Here you have some more according code:
>>
>> void TheHill::ProcessFrame() {
>> if (!this->g3d->BeginDraw(this->csp_engine->GetBeginDrawFlags() |
>> CSDRAW_3DGRAPHICS))
>> return;
>> if (!this->g3d->BeginDraw(CSDRAW_2DGRAPHICS))
>> return;
>>
>> // processing and writing text onto the hud
>>
>> this->g2d->FinishDraw();
>> this->g2d->Print(0);
>>
>> this->view->Draw();
>> }
>>
>> void TheHill::FinishFrame() {
>> this->csp_g3d->FinishDraw();
>> this->csp_g3d->Print(0);
>> }
>>
>> this->g2d->FinishDraw() and this->g2d->Print(0) do not work if they are
>> called after this->view->Draw().
>> The same if I call those functions within FinishFrame().
>>
>> Greetings,
>> Thomas
>>
>>
>> Jörg Fischer wrote:
>> > Hi,
>> > Thomas Teufel schrieb:
>> >
>> >> Hello!
>> >>
>> >> I have a problem with my 2d graphics driver.
>> >> I'm displaying a head up display with g2d which overlays the
>> >> g3d-rendered objects.
>> >>
>> >> Every thing works but the hud flickers.
>> >> But I am writing text onto the hud every renderloop.
>> >> Is it possible, that the g2d has a lower redraw rate than the g3d?
>> >>
>> >> Here is some according code I'm using for this:
>> >> // initialises g3d and g2d
>> >> csRef<iGraphics3D> g3d =
>> csQueryRegistry<iGraphics3D>(GetObjectRegistry());
>> >> csRef<iGraphics2D> g2d = g3d->GetDriver2D();
>> >>
>> >> g3d->BeginDraw(CSDRAW_2DGRAPHICS);
>> >>
>> >> // writes text onto the hud
>> >> g2d->Write(font, 30, 30, fg, bg, "Test");
>> >>
>> >> // finishes 2d drawing
>> >> g2d->FinishDraw();
>> >> g2d->Print(0);
>> >>
>> > ^^^^^^
>> > I think this is wrong, you never need to call Fishdraw() or Print() on
>> > your g2d;
>> > you have to call it on the g3d.
>> >
>> > If you call g3d->Print(0) elsewhere, this causes the flickering.
>> > g3d->Print() (and g2d->Print() too) will swap the front- and
>> backbuffer.
>> > This has to be done exactly once in a frame.
>> >
>> > -- J.Fischer
>> >
>> >
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