Particle Problem

I'm trying to figure out this bit of particle code - Here's a screenshot of what I'm getting. It's like a light show, the poly jumps around when I move and is very erratic - like what others have experienced, but I can't seem to fix it using what was prescribed to them. If anyone can tell me what I'm doing wrong, would greatly appreciate it. // The Particle vertex buffer and texture IDirect3DVertexBuffer8 *g_pParticleVB = NULL; IDirect3DTexture8 *g_pParticleTexture = NULL; #define VERTEXFVF (D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1) ~ // The 3D vertex format and descriptor typedef struct { FLOAT x, y, z; // 3D coordinates D3DCOLOR Diffuse; // Color FLOAT u, v; // Texture coordinates } s3DVertex; ~ BOOL CGraphics::SetupParticle() { BYTE *Ptr; s3DVertex Verts[4] = { { -50.0f, 50.0f, 0.0f, 0xFFFFFFFF, 0.0f, 0.0f }, { 50.0f, 50.0f, 0.0f, 0xFFFFFFFF, 1.0f, 0.0f }, { -50.0f, 0.0f, 0.0f, 0xFFFFFFFF, 0.0f, 1.0f }, { 50.0f, 0.0f, 0.0f, 0xFFFFFFFF, 1.0f, 1.0f } }; if(FAILED(m_pD3DDevice -> CreateVertexBuffer(sizeof(s3DVertex)*4, 0, VERTEXFVF, D3DPOOL_DEFAULT, &g_pParticleVB))) return FALSE; if(FAILED(g_pParticleVB -> Lock(0,0, (BYTE**)&Ptr, 0))) return FALSE; memcpy(Ptr, Verts, sizeof(Verts)); g_pParticleVB -> Unlock(); if(FAILED(D3DXCreateTextureFromFile(m_pD3DDevice, "Particle.bmp", &g_pParticleTexture))) return FALSE; return TRUE; } BOOL CGraphics::FrameParticle(float x, float y, float z, float scale) { static D3DMATERIAL8 Mat; static BOOL InitMat = TRUE; static DWORD Counter = timeGetTime(); if(timeGetTime() < Counter +30) return TRUE; Counter = timeGetTime(); D3DXMATRIX matWorld, matView, matTransposed; D3DXMATRIX matTranslation, matScale; D3DMATERIAL8 d3dm; float Red = (float)(rand() % 101) / 100.0f; float Green = (float)(rand() % 101) / 100.0f; float Blue = (float)(rand() % 101) / 100.0f; m_pD3DDevice -> SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE); m_pD3DDevice -> SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA); m_pD3DDevice -> SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE); m_pD3DDevice -> SetRenderState(D3DRS_AMBIENT, 0xffffffff); m_pD3DDevice -> SetStreamSource(0, g_pParticleVB, sizeof(sVertex)); //m_pD3DDevice -> SetVertexShader(VERTEXFVF); m_pD3DDevice -> SetTexture(0, g_pParticleTexture); ZeroMemory(&d3dm, sizeof(D3DMATERIAL8)); d3dm.Diffuse.r = d3dm.Ambient.r = Red; d3dm.Diffuse.g = d3dm.Ambient.g = Green; d3dm.Diffuse.b = d3dm.Ambient.b = Blue; d3dm.Diffuse.a = d3dm.Ambient.a = 10.0f; m_pD3DDevice -> SetMaterial(&d3dm); D3DXMatrixScaling(&matScale, scale, scale, scale); D3DXMatrixTranslation(&matTranslation, x, y, z); m_pD3DDevice -> GetTransform(D3DTS_VIEW, &matView); D3DXMatrixTranspose(&matTransposed, &matView); D3DXMatrixMultiply(&matWorld, &matScale, &matTransposed); D3DXMatrixMultiply(&matWorld, &matWorld, &matTranslation); m_pD3DDevice -> SetTransform(D3DTS_WORLD, &matWorld); m_pD3DDevice -> DrawPrimitive(D3DPT_TRIANGLESTRIP, 0,2); m_pD3DDevice -> SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE); m_pD3DDevice->SetTexture(0, NULL); return TRUE; } [edited by - PickDX on May 20, 2003 2:12:22 PM]