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SCEGU_VERTEX_SHORT

 
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su-27k



Joined: 16 Nov 2006
Posts: 12
PostPosted: Fri Jan 05, 2007 3:48 am    Post subject: SCEGU_VERTEX_SHORT Reply with quote
Hi...
I've been doing basic procedure to draw primitive with short vertex,but after 2 days i don't know why it dosn't work


Code:

typedef struct
{
   int      n;
   short  x,y,z,pad;
}   Vertex;


void Draw(){
if (mtx){PushMTx()}
      
   Vertex pVertex[3];
   pVertex[0].n=pVertex[1].n=pVertex[2].n=32756;
   pVertex[0].y=pVertex[1].y=pVertex[2].y= 0;

   pVertex[0].x=-3756;pVertex[0].z= 9527;
   pVertex[1].x= 3756;pVertex[1].z= 9527;
   pVertex[2].x=0;       pVertex[2].z= 1000;
   sceGuDrawArray(SCEGU_PRIM_TRIANGLES, SCEGU_NORMAL_BYTE|SCEGU_VERTEX_FLOAT ,3, NULL, pVertex);

   if (mtx){
PopMtx();
   }
}


displaylist mode isn't in SCEGU_IMMEDIATE mode,so i havn't incoherency between DCACHE and memory.
if vertex type is FLOAT,the draw work good,so where i mistake?

thanke you and sorry for my english
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hlide



Joined: 10 Sep 2006
Posts: 750
PostPosted: Fri Jan 05, 2007 5:30 am    Post subject: Re: SCEGU_VERTEX_SHORT Reply with quote
su-27k wrote:
Hi...
Code:

   sceGuDrawArray(SCEGU_PRIM_TRIANGLES, SCEGU_NORMAL_BYTE|SCEGU_VERTEX_FLOAT ,3, NULL, pVertex);



SCEGU_VERTEX_FLOAT is definately wrong !

something like SCEGU_VERTEX_SHORT would probably be better :o)
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su-27k



Joined: 16 Nov 2006
Posts: 12
PostPosted: Fri Jan 05, 2007 7:09 pm    Post subject: Re: SCEGU_VERTEX_SHORT Reply with quote
hlide wrote:
su-27k wrote:
Hi...
Code:

   sceGuDrawArray(SCEGU_PRIM_TRIANGLES, SCEGU_NORMAL_BYTE|SCEGU_VERTEX_FLOAT ,3, NULL, pVertex);



SCEGU_VERTEX_FLOAT is definately wrong !

something like SCEGU_VERTEX_SHORT would probably be better :o)


no asd :(
i have mistek to copy code.
my problem is

Code:

typedef struct
{
   int      n;
   short  x,y,z,pad;
}   Vertex;


void Draw(){
if (mtx){PushMTx()}
       
   Vertex pVertex[3];
   pVertex[0].n=pVertex[1].n=pVertex[2].n=32756;
   pVertex[0].y=pVertex[1].y=pVertex[2].y= 0;

   pVertex[0].x=-3756;pVertex[0].z= 9527;
   pVertex[1].x= 3756;pVertex[1].z= 9527;
   pVertex[2].x=0;       pVertex[2].z= 1000;
   sceGuDrawArray(SCEGU_PRIM_TRIANGLES, SCEGU_NORMAL_BYTE|SCEGU_VERTEX_SHORT ,3, NULL, pVertex);

   if (mtx){
PopMtx();
   }
}


this code don't work and i don't know where is the problem -_-'''''
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su-27k



Joined: 16 Nov 2006
Posts: 12
PostPosted: Fri Jan 05, 2007 8:04 pm    Post subject: Reply with quote
Code:
typedef struct
{
   byte      nx,ny,nz;
   byte      pad;
   short     x,y,z;
}   Vertex;


void Draw(){
if (mtx){PushMTx()}
       
   Vertex pVertex[3];
   pVertex[0].n=pVertex[1].n=pVertex[2].n=32756;
   pVertex[0].y=pVertex[1].y=pVertex[2].y= 0;

   pVertex[0].x=-3756;pVertex[0].z= 9527;
   pVertex[1].x= 3756;pVertex[1].z= 9527;
   pVertex[2].x=0;       pVertex[2].z= 1000;
   sceGuDrawArray(SCEGU_PRIM_TRIANGLES, SCEGU_NORMAL_BYTE|SCEGU_VERTEX_SHORT ,3, NULL, pVertex);

   if (mtx){
PopMtx();
   }
}


i have changed some allinement but it dosen't work
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hlide



Joined: 10 Sep 2006
Posts: 750
PostPosted: Fri Jan 05, 2007 10:26 pm    Post subject: Reply with quote
pVertex[i].n = 0x7FF4 !? (32756)

are you sure about this value ?

what are values of nx, ny and nz exactly ?

it looks something like [-12, 128, 0] or even worse [0, 0, 128] probably because of little endianness of allegrex.

your source code doesn't fit with your last type definition of Vertex, do you know ? you should be more precise.
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su-27k



Joined: 16 Nov 2006
Posts: 12
PostPosted: Fri Jan 05, 2007 11:58 pm    Post subject: Reply with quote
hlide wrote:
pVertex[i].n = 0x7FF4 !? (32756)

are you sure about this value ?

what are values of nx, ny and nz exactly ?

it looks something like [-12, 128, 0] or even worse [0, 0, 128] probably because of little endianness of allegrex.

your source code doesn't fit with your last type definition of Vertex, do you know ? you should be more precise.


i know that my code dosn't fit my last definition of Vertex sorry but the problem is another.

SCEGU_VERTEX_SHORT indicate model coordinate to 16 bit fixed point,3756 fixed point is little,it's eugual to less then 1.

;)
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hlide



Joined: 10 Sep 2006
Posts: 750
PostPosted: Sat Jan 06, 2007 12:30 am    Post subject: Reply with quote
i'm speaking about the normal vertex not the position vertex ! it doesn't fit your typedef Vertex. If you don't give the exact code, don't expect people to help you very much !
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su-27k



Joined: 16 Nov 2006
Posts: 12
PostPosted: Sat Jan 06, 2007 12:58 am    Post subject: Reply with quote
hlide wrote:
i'm speaking about the normal vertex not the position vertex ! it doesn't fit your typedef Vertex. If you don't give the exact code, don't expect people to help you very much !

sorry and thanke you for help

next time i will be more careful

byezz :)
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