//Those -inc s are the offset for the vertexptr to get to the data you want..
//i.e. :if you want the normal data you can do vertexptr+nromalinc and you have a pointer to it
int normalinc=0;
int texcoordinc=0;
int szfloat=sizeof(float);
int size=0;
//test which fvf-code are included in fvf:
if((fvf & D3DFVF_XYZ)==D3DFVF_XYZ)size+=3*sizeof(float);
else if((fvf & D3DFVF_XYZRHW)==D3DFVF_XYZRHW)size+=4*sizeof(float);
if((fvf & D3DFVF_NORMAL)==D3DFVF_NORMAL)
{
normalinc=size;
size+=3*sizeof(float);
}
if((fvf & D3DFVF_DIFFUSE)==D3DFVF_DIFFUSE)size+=sizeof(D3DCOLOR);
if((fvf & D3DFVF_SPECULAR)==D3DFVF_SPECULAR)size+=sizeof(D3DCOLOR);
if(fvf & D3DFVF_TEX1)
{
texcoordinc=size;
size+=2*sizeof(float);
}
//Here is the uncompleted code for the other fvfs...
Vertexsize from FVF
Author
First the topic is a bit misleading but it's the best topic i came up with..
I'm not only trying to get the vertexsize from the FVF but also bit-offsets to get pointers to the other elements of the vertex..(if you haven't understood this right know maybe looking at my code could help).
I don't know what is wrong with my code but if i pass D3DFVF_XYZ|D3DFVF_TEX1|D3DFVF_NORMAL to the function it doesn't execute the normal part but some texture stuff(which isn't included here) and the vertex size i get is 44 which isn't right.. it should be 32
anyway, my code:
I'm aware of D3DXGetFVFVertexSize but it doesn't help me in this case..
i hope anyone understood what i want and can help me
regards,
m4gnus
[Edited by - m4gnus on December 31, 2005 6:41:12 AM]
I understand what you want; it is clear. Have you looked into vertex declarations? These are the replacements for (old) FVFs and do precisely what you are trying to do manually.
Now for the size of D3DFVF_XYZ|D3DFVF_TEX1|D3DFVF_NORMAL. It seems to me this vertex consists of 3 + 2 + 3 floats = 8 floating points. The vertex size would be a multiple of 8 and can therefore never be 36 (rahter 32).
I'm currently looking into your code...
Illco
Now for the size of D3DFVF_XYZ|D3DFVF_TEX1|D3DFVF_NORMAL. It seems to me this vertex consists of 3 + 2 + 3 floats = 8 floating points. The vertex size would be a multiple of 8 and can therefore never be 36 (rahter 32).
I'm currently looking into your code...
Illco
Author
oops ok you're right about the 32bytes...
btw the fvf for D3DFVF_XYZ|D3DFVF_TEX1|D3DFVF_NORMAL was 0x000000112 if i remember right
btw the fvf for D3DFVF_XYZ|D3DFVF_TEX1|D3DFVF_NORMAL was 0x000000112 if i remember right
Just a quick guess, but shouldn't this line:
if(fvf & D3DFVF_TEX1)
be
if( (fvf & D3DFVF_TEX1) == D3DFVF_TEX1)
That also seems consistent with the 2 * 4 bytes you get too much (assuming a float is 4 bytes in unmanaged code too)... It may not apply to your problem directly, but it seems to be off anyway...
if(fvf & D3DFVF_TEX1)
be
if( (fvf & D3DFVF_TEX1) == D3DFVF_TEX1)
That also seems consistent with the 2 * 4 bytes you get too much (assuming a float is 4 bytes in unmanaged code too)... It may not apply to your problem directly, but it seems to be off anyway...
Your code works fine. My test:
The program prints:
Illco
#include <stdio.h>#include <d3dx9.h>int ComputeFVFSize( DWORD fvf ){//Those -inc s are the offset for the vertexptr to get to the data you want.. //i.e. :if you want the normal data you can do vertexptr+nromalinc and you have a pointer to it int normalinc=0; int texcoordinc=0; int szfloat=sizeof(float); int size=0; //test which fvf-code are included in fvf: if((fvf & D3DFVF_XYZ)==D3DFVF_XYZ)size+=3*sizeof(float); else if((fvf & D3DFVF_XYZRHW)==D3DFVF_XYZRHW)size+=4*sizeof(float); if((fvf & D3DFVF_NORMAL)==D3DFVF_NORMAL) { normalinc=size; size+=3*sizeof(float); } if((fvf & D3DFVF_DIFFUSE)==D3DFVF_DIFFUSE)size+=sizeof(D3DCOLOR); if((fvf & D3DFVF_SPECULAR)==D3DFVF_SPECULAR)size+=sizeof(D3DCOLOR); if(fvf & D3DFVF_TEX1) { texcoordinc=size; size+=2*sizeof(float); } //Here is the uncompleted code for the other fvfs... return size;}void main( void ){ DWORD dwFVF = D3DFVF_XYZ|D3DFVF_TEX1|D3DFVF_NORMAL; printf( "Size of FVF is %d.\n", ComputeFVFSize( dwFVF ) );}The program prints:
Size of FVF is 32.Illco
Author
yeah sorry i also discovered that right now :/ the function was called from somewhere else with another fvf ...
regards,
m4gnus
regards,
m4gnus
This topic is closed to new replies.
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