Hi everyone

i am trying to learn to use pointsprites and i have one sprite drawn.

it works fine if i just draw the sprite

but if i first draw a skybox and then the sprite its not visible

i tried to disable Z wrtiting before the Skybox like this:
m_pd3dDevice->SetRenderState(D3DRS_ZWRITEENABLE, D3DZB_FALSE);

but it didnt do any good

does anyone have any ideas for me please?

i just realized it might be even a bigger problem than i thought:(

when i just had the particle in the origin it showed as it should as long as i didnt render the skybox but when i put somthing in for x or z as a position it started moving which it really shouldnt

here is my code if someone could take a look at it
[source]
struct PARTICLECUSTOMVERTEX{
float x, y, z;
DWORD Diffuse;
};
#define D3DFVF_PARTICLEVERTEX (D3DFVF_XYZ | D3DFVF_DIFFUSE)

class FBSParticleSystem
{
private:
protected:
public:
FBSParticle *m_Particles;
DWORD m_NumParticles;
LPDIRECT3DVERTEXBUFFER9 m_pVB;
LPDIRECT3DTEXTURE9 m_Texture;

FBSParticleSystem(LPDIRECT3DDEVICE9 Device, DWORD NumParticles)
{
m_NumParticles = NumParticles;
m_Particles = new FBSParticle[m_NumParticles];
m_pVB = NULL;
m_Texture = NULL;
Device->CreateVertexBuffer(m_NumParticles*sizeof(PARTICLECUSTOMVERTEX), 0, D3DFVF_PARTICLEVERTEX, D3DPOOL_DEFAULT, &m_pVB, NULL);
if(FAILED(D3DXCreateTextureFromFile(Device, "Sprite.bmp", &m_Texture))){
MessageBox(NULL, "Could not find 2.bmp", "Particle", MB_OK);
}
}

~FBSParticleSystem()
{
if(m_pVB)
m_pVB->Release();

if(m_Texture)
m_Texture->Release();

if(m_Particles)
delete [] m_Particles;
}

VOID Update(LPDIRECT3DDEVICE9 g_pd3dDevice)
{
PARTICLECUSTOMVERTEX *vertices = new PARTICLECUSTOMVERTEX[m_NumParticles];
for(DWORD Counter = 0; Counter < m_NumParticles; Counter++)
{
vertices[Counter].x = 5;
vertices[Counter].y = 5;
vertices[Counter].z = 0;
}
PARTICLECUSTOMVERTEX* pVertices = NULL;
m_pVB->Lock( 0, sizeof(PARTICLECUSTOMVERTEX) * m_NumParticles, (void**)&pVertices, D3DLOCK_DISCARD);
memcpy( pVertices, vertices, sizeof(PARTICLECUSTOMVERTEX)*m_NumParticles );
m_pVB->Unlock();
FLOAT MinSize, Scale1, Scale2, Scale3, Size;

Size = 15.0f;
MinSize = 0.0f;
Scale1 = 0.0f;
Scale2 = 0.0f;
Scale3 = 1.0f;

g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, false );
g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE,TRUE);
g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND,D3DBLEND_ONE);

g_pd3dDevice->SetRenderState(D3DRS_POINTSPRITEENABLE, true);
g_pd3dDevice->SetRenderState(D3DRS_POINTSCALEENABLE, true);
g_pd3dDevice->SetRenderState( D3DRS_POINTSIZE, *((DWORD*)&Size ));
g_pd3dDevice->SetRenderState(D3DRS_POINTSIZE_MIN, *((DWORD*)&MinSize));
g_pd3dDevice->SetRenderState(D3DRS_POINTSCALE_A, *((DWORD*)&Scale1));
g_pd3dDevice->SetRenderState(D3DRS_POINTSCALE_B, *((DWORD*)&Scale2));
g_pd3dDevice->SetRenderState(D3DRS_POINTSCALE_C, *((DWORD*)&Scale3));

g_pd3dDevice->SetStreamSource( 0, m_pVB, 0, sizeof(PARTICLECUSTOMVERTEX) );
g_pd3dDevice->SetFVF( D3DFVF_PARTICLEVERTEX );
g_pd3dDevice->SetTexture(0, m_Texture);
g_pd3dDevice->DrawPrimitive( D3DPT_POINTLIST, 0, m_NumParticles );

g_pd3dDevice->SetRenderState( D3DRS_POINTSCALEENABLE, FALSE );
g_pd3dDevice->SetRenderState( D3DRS_POINTSPRITEENABLE, FALSE );
g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE,false);

}
};





could it be something about the way i fill the Vertex-Buffer?

[/source]