I''m writing a fractal terrain generator in DX8 and I''ve had my program crash every time I make my terrain larger than 21 x 21. I''ve isolated it to the texture code, when I remove texture loading it works fine. My D3D8 init looks like so (Sorry about the length): ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // initTriangles // Initialize the 3D mesh loaded from file HRESULT initTriangles() { HRESULT hr; // build a vertex buffer that matches our vertex format int num_elems = cVertex; #ifdef DEBUG_ON fprintf(pLOG,"NUMBER OF VERTICES = %d \n",num_elems); fprintf(pLOG,"SIZE IN KB = %d\n\n",sizeof(vertex)*num_elems); #endif hr = pID3DDevice->CreateVertexBuffer(sizeof(vertex) * num_elems, D3DUSAGE_WRITEONLY, D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1, D3DPOOL_DEFAULT, &pStreamData); if(FAILED(hr)) { #ifdef DEBUG_ON fprintf(pLOG,"DX8 D3D CreateVertexBuffer HAS FAILED, ERROR: "); errorLog(hr); #endif closeDINPUT(); shutdownD3D(); exit(0); } vertex *v; hr = pStreamData->Lock(0, 0, (BYTE**)&v, 0); if(FAILED(hr)) exit(0); /********************************** * INITIALIZE ALL THE VERTICIES **********************************/ for(int ii = 0; ii < num_elems; ii++) { v[ii].x = vertices[ii].x; v[ii].y = vertices[ii].y; v[ii].z = vertices[ii].z; v[ii].color = vertices[ii].color; v[ii].tu = vertices[ii].tu; v[ii].tv = vertices[ii].tv; } hr = pStreamData->Unlock(); if(FAILED(hr)) { #ifdef DEBUG_ON fprintf(pLOG,"DX8 D3D GetAdapterDisplayMode HAS FAILED, ERROR: "); errorLog(hr); #endif closeDINPUT(); shutdownD3D(); exit(0); } hr = pID3DDevice->SetVertexShader(D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1); if(FAILED(hr)) { #ifdef DEBUG_ON fprintf(pLOG,"DX8 D3D GetAdapterDisplayMode HAS FAILED, ERROR: "); errorLog(hr); #endif closeDINPUT(); shutdownD3D(); exit(0); } hr = pID3DDevice->SetStreamSource(0, pStreamData, sizeof(vertex)); /*********************************** * INITIALIZE ALL THE INDICIES ***********************************/ num_elems = cIndex; #ifdef DEBUG_ON fprintf(pLOG,"NUMBER OF INDICES = %d \n",num_elems); fprintf(pLOG,"SIZE IN KB = %d \n\n",sizeof(WORD)*num_elems); #endif hr = pID3DDevice->CreateIndexBuffer(sizeof(WORD) * num_elems, // in bytes, not indices D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_DEFAULT, &pIndexBuffer); WORD *pIndex; hr = pIndexBuffer->Lock(0, 0, (BYTE **)&pIndex, 0); if(FAILED(hr)) { #ifdef DEBUG_ON fprintf(pLOG,"DX8 D3D GetAdapterDisplayMode HAS FAILED, ERROR: "); errorLog(hr); #endif closeDINPUT(); shutdownD3D(); exit(0); } for(ii = 0; ii < num_elems; ii++) { pIndex[ii] = indices[ii]; } hr = pIndexBuffer->Unlock(); if(FAILED(hr)) { #ifdef DEBUG_ON fprintf(pLOG,"DX8 D3D GetAdapterDisplayMode HAS FAILED, ERROR: "); errorLog(hr); #endif closeDINPUT(); shutdownD3D(); exit(0); } hr = pID3DDevice->SetIndices(pIndexBuffer, 0); if(FAILED(hr)) { #ifdef DEBUG_ON fprintf(pLOG,"DX8 D3D GetAdapterDisplayMode HAS FAILED, ERROR: "); errorLog(hr); #endif closeDINPUT(); shutdownD3D(); exit(0); } //LOAD THE GREEN TEXTURE hr = D3DXCreateTextureFromFileA(pID3DDevice, "1.bmp", &pTexture); if (FAILED(hr)) { #ifdef DEBUG_ON fprintf(pLOG,"DX8 D3D GetAdapterDisplayMode HAS FAILED, ERROR: "); errorLog(hr); #endif closeDINPUT(); shutdownD3D(); exit(0); } // pID3DDevice->SetTexture(0, pTexture); return hr; } The program crashes if I have the : //LOAD THE GREEN TEXTURE hr = D3DXCreateTextureFromFileA(pID3DDevice, "1.bmp", &pTexture); line, but if I remove it, or my terrain is small enough everything works fine. This isin''t a DX error, there is a system error. Is there another way of loading textures into DX8? I''m assuming it''s a memory issue or something, but quite frankly I''ve little experience in DX programming, I''ve been using OpenGL until now. Any suggestions would be much appreciated.

Is "1.bmp" a square (width == height) with 2^n pix length?

DX8 Samples are here

Yes, it's a 256x256 bmp file.

Edited by - Ataru on January 27, 2001 11:47:04 AM

maybe this works:
if( FAILED( D3DXCreateTextureFromFile( pID3DDevice, "1.bmp",&pTexture ) ) )
return E_FAIL;


Edited by - Jonus on January 27, 2001 1:29:17 PM

I fixed it, and it had nothing to do with what I sent. I was so sure my inexperience in DX8 was causing the problem that I didn''t realise I had a bug somewhere else in my code. I was not allocating enough memory for my terrain.

Gotta love C, since it worked with an array of certain size, I guess that I was accesing memory that was used for textures, causing the crash. Anyway, thanks for your help.

P.S. your site is very nice.