Pre rendered vs real-time drawing

[daydreamer]

Hi
I been researching isometric 3d and written slow isometric tile drawing with gdi lines and another program I write to. Bmp files
Many old games used lot of prerendered graphics when 3d hardware drawing was inferior

Would be nice speed test draw everything each frame vs initialize lots of 3d tiles/3d background like described above and only bitblt

updated,had to find my code first
pseudo3diso3d draws isometric with gdi lines+other things
threadsxv2 writes out to 2 bmp files

[daydreamer]

Some pseudocode mixed with asm,new version

Code Select Expand

Bmp handle background dd 0
Map array [1024*1024 ] ; tile map
Placables [1024*1024] ; placables data
Isometric
Init
Background =Loadbmp "c:/bmp/prerendered background"
Openf "/bmp/map1.bmp"
Map array fRead array
Close
Mov ecx,map array length
Lea esi,map array
Lea edi,placables array
L1:Mov eax,[esi]
Cmp eax,0 ; if tile height zero
Jne l2
Inc eax ; put placables there
; else no placables
L2:Mov [edi],eax
Inc esi
Inc edi
Dec ecx
Jne l1
;Faster several Xorps map array  invert to placables map




Wm_paint
Bitblt background
Draw isometric (dc)
Proc scale,x,y ; scale isometric drawing to fit different screen resolution
Fild x
Fmul xscale ; scale x, so max X is inside screen
Fistp x
Fild y
Fmul yscale ;scale y,so max y fits inside screen
Fistp y

Ret
Endp scale
Macro To iso
Mov eax,y ; or register that is used for y
Mov ebx,x ; or register used for x
Sub ebx,y
Add eax,x
Sal eax,1 ; div 2
End macro
Draw isometric
For y= 0 to max {
Mov esi, 32 pixels ; if bigger 64 tile wide map unroll this
Mov edi, 32 placables
For x=0 to 31
Rol esi,1
Jump if carry clear l over
Isox = x-y
Isox=(x+Y) /2
Invoke scale,Isox,isoy
Draw tile Isox,isoy ,height ; maybe keep tile in xmm regs and mem copy 256 colors pixels = xmm regs fit 16 pixel wide
Lover :
Rol edi,1
Jump if carry clear lover 2
To iso ; macro
Invoke scale,Isox,isoy
Draw oval Isox,isoy,height ; or coin. Ico

Lover 2:

} // y



[daydreamer]

Used loadbitmap in my windows to load bmp generated by earlier console program
Now got stuck try using bitblt in wm_paint :(
Only want to display bitmap from file,not manipulate it

[jj2007]

Now got stuck try using bitblt in wm_paint :(

Full project attached, 49 lines of purest Masm32 SDK code

[daydreamer]

There is lot of file system macros in masm32, so you can delete old version of file before writing new version
But any way to first get last time it was written and later down in code get last time again and check if updated version of file exist
Delete object and loadbitmap again?

[jj2007]

any way to first get last time it was written and later down in code get last time again

WIN32_FIND_DATA.ftLastWriteTime maybe?

[daydreamer]

any way to first get last time it was written and later down in code get last time again

WIN32_FIND_DATA.ftLastWriteTime maybe?

Maybe
Api to get detailed info on file and check that

[jj2007]

Api to get detailed info on file

FFF (Fridays For Future or FindFirstFile)