Opengl Without Tearing

[Jan-Nik]

I'm using the following package to create an OpenGL game for the Wiz: http://dl.openhandhelds.org/cgi-bin/wiz.cgi?0,0,0,0,46,188

Unfortunate it still has tearing. How can I fix that?


BTW: I heard that GPH is working on their own replacement for wizGLES. Any news on that?

 

[trentg]

Initialize your display in portrait mode. Not sure how that particular package does that. That means having a 240x320 display. Then after doing all the initialization for the screen, set a viewport, a projection (orthographic for 2d game), then modify the projection with glRotate and glTranslate calls (90 degrees rotate on x axis, 240 pixels translation on the x axis, this all assumes you're using a 240x320 orthographic projection). Hope this helps.

 

[Pickle]

I'm using the following package to create an OpenGL game for the Wiz: http://dl.openhandhe...?0,0,0,0,46,188

Unfortunate it still has tearing. How can I fix that?


BTW: I heard that GPH is working on their own replacement for wizGLES. Any news on that?

Its already on the lastest image, i have the source and intend to release a new 3d dev pack....sometime ;-)

 

[crow_riot]

as the others said, the display must be initialized properly first (in it's native 240x320 mode). i've a modified version of wizGLES.h/cpp inside the tissueGL virtual framebuffer. source can be downloaded here: http://crow.riot.org/wiz/tissueGL-src.tgz

as trentg notices, you need of course rotate your view by 90 degree in z (opengl z axis points to the user, -z away). if you're using opengl stack i think it might be sufficient to call glRotate(90,0,0,1) (or was it glRotate(-90,0,0,1) ) at the very beginning to setup you your initial rotation ( somewhere right after glMatrixMode(GL_MODELVIEW); glLoadIdentity(); )

keep in mind that your aspect is not 320/240 then but 240/320...

 

[Jan-Nik]

as the others said, the display must be initialized properly first (in it's native 240x320 mode). i've a modified version of wizGLES.h/cpp inside the tissueGL virtual framebuffer. source can be downloaded here: http://crow.riot.org/wiz/tissueGL-src.tgz

as trentg notices, you need of course rotate your view by 90 degree in z (opengl z axis points to the user, -z away). if you're using opengl stack i think it might be sufficient to call glRotate(90,0,0,1) (or was it glRotate(-90,0,0,1) ) at the very beginning to setup you your initial rotation ( somewhere right after glMatrixMode(GL_MODELVIEW); glLoadIdentity(); )

keep in mind that your aspect is not 320/240 then but 240/320...

Thanks! I will try that.

Its already on the lastest image, i have the source and intend to release a new 3d dev pack....sometime ;-)

Do you think you will release in the next weeks? Or could you send me the source since I want to start to work on a game for the Pandora Angst Coding Competition?

 

[Pickle]

Its already on the lastest image, i have the source and intend to release a new 3d dev pack....sometime ;-)

Do you think you will release in the next weeks? Or could you send me the source since I want to start to work on a game for the Pandora Angst Coding Competition?

Yes i will make effort to.

 

[Jan-Nik]

Okay, thank you very much! You're the best

 

[d4rkm4r3]

(Asking as OpenGl programmer, not OpenGL ES) Why not rotating (90°) the projection matrix only once at programm start?

Edit: I miss trentg post ... getting old

 

[crow_riot]

(i think that's what trentg suggested)