Sprite limit modification

ramon
Final Barrier

objects

Posts: 253

Sprite limit modification Jul 22, 2021 2:17:55 GMT

Quote

Post by ramon on Jul 22, 2021 2:17:55 GMT

1) You can modify the sprite limit so that the AGD engine paints them on screen at the same time. This slows down the game. 12 is the optimal number of sprites that can appear at the same time to get a smooth movement of all things.

To do this, modify the following code in the EngineZX.asm which is in the AGD folder inside the SuiteZX.

Look for the Sprites section at the beginning of the program:

; Sprites.

NUMSPR equ 12 ; number of sprites.

TABSIZ equ 17 ; size of each entry.

SPRBUF equ NUMSPR * TABSIZ ; size of entire table.

NMESIZ equ 4 ; bytes stored in nmetab for each sprite.

X equ 8 ; new x coordinate of sprite.

Y equ X + 1 ; new y coordinate of sprite.

PAM1ST equ 5 ; first sprite parameter, old x (ix+5).

Add two more options, if you want to select them uncomment the option making sure to leave the other two commented. it can be like this:

; Sprites.

NUMSPR equ 12 ; number of sprites.

;NUMSPR equ 24 ; SPACE INVADERS number of sprites.

;NUMSPR equ 48 ; METEORITOS number of sprites.

TABSIZ equ 17 ; size of each entry.

SPRBUF equ NUMSPR * TABSIZ ; size of entire table.

NMESIZ equ 4 ; bytes stored in nmetab for each sprite.

X equ 8 ; new x coordinate of sprite.

Y equ X + 1 ; new y coordinate of sprite.

PAM1ST equ 5 ; first sprite parameter, old x (ix+5).

2) Now, at the end of the program, look for the section block NUMSPR * TABSIZ, 255

; block NUMSPR * TABSIZ,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

ssprit defb 255,255,255,255,255,255,255,0,192,120,0,0,0,255,255,255,255

roomtb defb 34 ; room number.

Change the entire section to look like this:

; block NUMSPR * TABSIZ,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

; extra 12+ sprites modificación para SPACE INVADERS

IF NUMSPR = 24

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

ENDIF

; extra 36+ sprites modificación para METEORITOS

IF NUMSPR = 48

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

ENDIF

ssprit defb 255,255,255,255,255,255,255,0,192,120,0,0,0,255,255,255,255

roomtb defb 34 ; room number.

This is all.

You will lose speed in the flow of your game but you will win some more enemy or some more bullet in the sky

Regreso al año 1985 desde el futuro.

Latest Status: objects
Web Site: pacmanzxspectrum.blogspot.com
Game: ramon-fernandez.itch.io/pac-man-zx-spectrum
Tool: ramon-fernandez.itch.io/mpagd-reloaded
Location: Pontevedra, España
Posts: 250+
Date Registered: Jul 15, 2020 at 8:03pm

oss003
Solar Power Generator

Posts: 143

Sprite limit modification Jul 24, 2021 12:29:43 GMT ramon likes this

Quote

Post by oss003 on Jul 24, 2021 12:29:43 GMT

Well, 12 sprites are choosen to avoid flickering and speed reduction.
You can indeed change the variable NUMSPR in the engine and add some extra lines to the sprtab table.

If you change the sprtab code in the engine to this, then you only have to change NUMSPR to change the number of sprites on the screen:

sprtab equ $

; block NUMSPR * TABSIZ,255

defs NUMSPR*TABSIZ,255

; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
; defb 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255

ssprit defb 255,255,255,255,255,255,255,0,192,120,0,0,0,255,255,255,255

roomtb defb 34 ; room number.

Greetings
Kees

Last Edit: Jul 24, 2021 12:31:38 GMT by oss003

alchemist Wacky Amoebatron Posts: 38	Sprite limit modification Mar 20, 2024 21:01:42 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by alchemist on Mar 20, 2024 21:01:42 GMT Hi I set NUMSPR equ 22 and added the correct number of DEFB lines Well, when i export game, AGD compiler reports two "bytes lost" errors. It happens for every NUMSPR value > 14 Why?

ramon
Final Barrier

objects

Posts: 253

Sprite limit modification Mar 21, 2024 13:41:03 GMT

Quote

Post by ramon on Mar 21, 2024 13:41:03 GMT

It is solved in MPAGD Reloaded. But if you are using MPAGD Original then try this:

1-Change The final code of sprtab in the ZXEngine.asm to this:

sprtab equ $

       defs SPRBUF,255 

ssprit defb 255,255,255,255,255,255,255,0,192,120,0,0,0,255,255,255,255 

roomtb defb 34                     ; room number.

2-Change the number of sprites (12,13,9,19) here:

NUMSPR equ 12              ; number of sprites.

3-Change the section code xspr to this:

; Clear sprite table.

xspr   ld b,NUMSPR         ; sprite slots in table.
       ld ix,sprtab        ; sprite table.
       ld de,TABSIZ        ; distance to next odd/even entry.
xspr0  ld (ix+0),255       ; delete sprite.
       ld (ix+1),255       
       ld (ix+2),255       
       ld (ix+3),255       
       ld (ix+4),255       
       ld (ix+5),255       
       ld (ix+6),255       
       ld (ix+7),255       
       ld (ix+8),255       
       ld (ix+9),255       
       ld (ix+10),255       
       ld (ix+11),255       
       ld (ix+12),255       
       ld (ix+13),255       
       ld (ix+14),255       
       ld (ix+15),255       
       ld (ix+16),255            
       add ix,de           ; next sprite.
       djnz xspr0          ; one less space in the table.
       ret

; xspr
	   ; ld hl,sprtab        ; sprite table.
       ; ld bc,SPRBUF         ; length of table.
; xspr0  ld (hl),255         ; clear one byte.
       ; inc hl              ; move to next byte.
       ; djnz xspr0          ; repeat for rest of table.
       ; ret

Regreso al año 1985 desde el futuro.

Latest Status: objects
Web Site: pacmanzxspectrum.blogspot.com
Game: ramon-fernandez.itch.io/pac-man-zx-spectrum
Tool: ramon-fernandez.itch.io/mpagd-reloaded
Location: Pontevedra, España
Posts: 250+
Date Registered: Jul 15, 2020 at 8:03pm

ramon
Final Barrier

objects

Posts: 253

Sprite limit modification Mar 21, 2024 13:44:51 GMT

Quote

Post by ramon on Mar 21, 2024 13:44:51 GMT

Mar 20, 2024 21:01:42 GMT alchemist said:

Hi

I set NUMSPR equ 22 and added the correct number of DEFB lines
Well, when i export game, AGD compiler reports two "bytes lost" errors. It happens for every NUMSPR value > 14
Why?

The reason is that the xspr routine cannot count a 16-bit number to work. I replaced it with another rough version.

Regreso al año 1985 desde el futuro.

Latest Status: objects
Web Site: pacmanzxspectrum.blogspot.com
Game: ramon-fernandez.itch.io/pac-man-zx-spectrum
Tool: ramon-fernandez.itch.io/mpagd-reloaded
Location: Pontevedra, España
Posts: 250+
Date Registered: Jul 15, 2020 at 8:03pm

Sprite limit modification

Post by ramon on Jul 22, 2021 2:17:55 GMT

Post by oss003 on Jul 24, 2021 12:29:43 GMT

Post by alchemist on Mar 20, 2024 21:01:42 GMT

Post by ramon on Mar 21, 2024 13:41:03 GMT

Post by ramon on Mar 21, 2024 13:44:51 GMT