Ok what I am trying to do is plot pixels directly to the Video memory using the PR_SURFACE Functions. For some reason I can't get any pixel(s) to display on my screen. Heres what I have set up so far: I declare my varibles as this: PR_SURFACE mysurface; PR_DWORD pitch = 0; PR_UCHAR *surface_bits; //I allocate my surface here mysurface = PR_AllocateSurface (640, 480, D3DFMT_R8G8B8); /* main program loop */ while (!kbdon[KEY_ESC]) { UpdateMessages (); PR_OpenScreen (PR_BACKBUFFER); PR_NewFrame (); /* Begin a new frame */ PRGFX_SetColor (BLACK); PRGFX_ClearScreen (); /* Clear the last frame */ PR_TransformLights (&userlights); move_count = PR_GetTicks (); PR_RotateEntity (entity, //0.1f, 1.2f, 0.3f); 0.1f * move_count, 1.2f * move_count, 0.3f * move_count); PR_TransformEntity (entity); //PR_RenderEntity (entity); //Start drawing points //Returns Address of start of Video Memory after surface locked surface_bits = (PR_UCHAR *) PR_LockSurface (mysurface, &pitch); if (surface_bits == NULL) return; //Start drawing points for(i = 0; i < 1000; i++) { x = rand() % 640; y = rand() % 480; surface_bits[x + y*pitch] = PRGFX_MakeColor(255,255,255); } PR_UnlockSurface (mysurface); PR_RenderFrame (); /* Draw the scene */ PR_Flip (1); /* Show the background page */ } I wonder what I am doing wrong. Chris or anyone no what I am doing wrong. Thanks Doug Edited by - sovereign on October 15, 2001 12:18:47 AM

"Where do you draw the surface?"
I''m using this to write to the surface since this is supposed be the address for the video after the Surface is locked
surface_bits[x + y*pitch] = PRGFX_MakeColor(255,255,255) or what ever value I need to write based on some format;

"You write some stuff to it but don''t do anything with it afterwards."

So what else do I need to do to make this work? Am I missing a step?

All I want to do is Plot some pixels much like the
PRGFX_Line , but is inefficient because of excessive locking and unlocking of the surface just to draw one pixel.

So I figure it is alot faster to lock the surface then plot a bunch of pixels and unlock the surface after I am done. I figure this would be a lot quicker than the PRGFX functions.

You did suggest that I look into using the DrawPrimitive function using Point list but I am not to knowlegable with Direct 3D stuff so bear with me. I did read the DX8 Doc trying to understand this stuff but I am sort of winging it.

I did a search on my hardrive for examples of you using the PR_Surface Functions and found some files that you use these functions in. My program was sort of based on what I saw in seting up the varibles and functions. I am not sure what the correct D3DFORMAT just to plot piexls using the red, green, blue values in the range of 0 to 255.

Is there any way you can provide a working example such as ploting pixels to video memory?

Doug