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GU(ru's needed) related

 
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PosX100



Joined: 15 Aug 2007
Posts: 98
PostPosted: Mon Apr 28, 2008 12:00 am    Post subject: GU(ru's needed) related Reply with quote
(lame title , i know :) )

Im trying to add 2d support(for panels/menu..etc) in my simple 3d app(its more like a demo atm),but im not sure how to change the projection.

In opengl , im doing it like this:

Code:

//             Renderer.cpp
inline static  void renderMode(const RendererData& r)
   {
      switch(r.renderer)
         {
         case   RENDERER_OPENGL :
            {
                 glViewport(0, 0, r.getWidth(), r.getHeight());   
                 glMatrixMode(GL_PROJECTION);       
                 glLoadIdentity(); 
            if(r.getRenderMode()==RENDER_MODE_2D)
            glOrtho( 0, r.getWidth(),r.getHeight(), 0, -1, 1 );
            else
            gluPerspective(r.getFov(), r.getAspectRatio(), r.getNear(), r.getFar());
                 glMatrixMode(GL_MODELVIEW);         
            glLoadIdentity();
            return;
            }
         case   RENDERER_PSPGU :
            {
            // -___________________-
            return;
            }
         }
   }
}


Could you help me out so i can add GU support?

Thanks.
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quadrizo



Joined: 23 Aug 2007
Posts: 21
PostPosted: Mon Apr 28, 2008 1:32 am    Post subject: Reply with quote
you don't need to give a specific ortho projection with GU :

when you use sceGuDrawArray to display yours vertices, give the GU_TRANSFORM_2D parameter: all 3d matrices (rotation, project,...) will not be take in account
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Insert_witty_name



Joined: 10 May 2006
Posts: 376
PostPosted: Mon Apr 28, 2008 3:40 am    Post subject: Reply with quote
As quadrizo mentioned, if you're passing GU_TRANSFORM_2D then you don't need to do anything.

If you are wanting an ortho projection then you would do something like this:

Code:
// 3D drawing.

sceGumMatrixMode(GU_PROJECTION);
sceGumLoadIdentity();
sceGumOrtho(0.0f, 480.0f, 272.0f, 0.0f, -1.0f, 1.0f);

sceGumMatrixMode(GU_VIEW);
sceGumLoadIdentity();

sceGumMatrixMode(GU_MODEL);
sceGumLoadIdentity();

// Ortho drawing.
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PosX100



Joined: 15 Aug 2007
Posts: 98
PostPosted: Mon Apr 28, 2008 10:45 pm    Post subject: Reply with quote
I see. thanks both for helping me out !
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