many sprites slow down my game - GameCreators Forum

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Cybermind

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22

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Joined: 28th Nov 2002

Location: Denmark

Posted: 5th Oct 2004 05:38

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here is my source

SYNC ON
SYNC RATE 60
BACKDROP OFF
SET DISPLAY MODE 320,240,32
GOSUB load_sprites
current_sprite_to_place = 20000
space_key_Stopper = 0
SPRITE 2,SPRITE X(1),SPRITE Y(1),200

rem main editor loop
DO

rem get scancode from keyboard
keypress = SCANCODE()
IF keypress = 0
 stopper = 0
ENDIF
SET CURSOR 0,0
PRINT SPRITE COLLISION(1,0)

GOSUB cursor_movement
GOSUB select_tile
GOSUB paint_tile
GOSUB save_map
rem end of main loop
SYNC
LOOP

cursor_movement:

rem set stopper to zero when no key is pressed
IF DOWNKEY() = 0 AND UPKEY() = 0 AND LEFTKEY() = 0 AND RIGHTKEY() = 0
 stopper_dir_keys = 0
ENDIF

rem up
IF UPKEY() = 1 AND stopper_dir_keys = 0
 FOR current_tile = 20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile),SPRITE Y(current_tile)+16,SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem down
IF DOWNKEY() = 1 AND stopper_dir_keys = 0
 FOR current_tile =  20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile),SPRITE Y(current_tile)-16,SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem left
IF LEFTKEY() = 1 AND stopper_dir_keys = 0
 FOR current_tile =  20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile)+16,SPRITE Y(current_tile),SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem right
IF RIGHTKEY() = 1
 FOR current_tile =  20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile)-16,SPRITE Y(current_tile),SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem return from cursor movement
RETURN

select_tile:
rem keypress 28 is enter
IF keypress = 28 AND stopper = 0
 active_piece = active_piece + 1
 stopper = 1
 DELETE SPRITE 2
 CLONE SPRITE active_piece,2
ENDIF

rem keypress 14 is backspace
IF keypress = 14 AND stopper = 0
 active_piece = active_piece - 1
 stopper = 1
 DELETE SPRITE 2
 CLONE SPRITE active_piece,2
ENDIF
SPRITE 2,SPRITE X(1),SPRITE Y(1),SPRITE IMAGE(active_piece)

rem return from select_tile
RETURN

paint_tile:
rem keypress 57 is space
IF keypress = 57 AND space_key_stopper = 0
 CLONE SPRITE 2,current_sprite_to_place
 SPRITE current_sprite_to_place,SPRITE X(1),SPRITE Y(1),SPRITE IMAGE(2)
 current_sprite_to_place = current_sprite_to_place + 1
 space_key_stopper = 1
ENDIF

rem return from paint_tile
RETURN

REM ******FILE STUFF TRY OUT :P********
save_map:

rem keypress 31 is s
IF keypress = 31
 IF FILE EXIST("map1.map")
  DELETE FILE "map1.map"
 ENDIF
 OPEN TO WRITE 1,"map1.map"
 FOR current_tile_to_save = 20000 to 62000
  IF SPRITE EXIST(current_tile_to_save)
   WRITE LONG 1,SPRITE X(current_tile_to_save)
   WRITE LONG 1,SPRITE Y(current_tile_to_save)
   WRITE LONG 1,SPRITE IMAGE(current_tile_to_save)
  ENDIF
 NEXT current_tile_to_save
 CLOSE FILE 1
ENDIF

rem return from save file
RETURN

REM *************************
REM *****LOAD SPRITES********
REM *************************
load_sprites:
rem ******************************
rem *****get lowest tile**********
rem ******************************

rem ******************************
rem ******get bottom tiles********
rem ******************************

rem get test piece
LOAD BITMAP "bmp\tiles\tile7.bmp",1
GET IMAGE 200,0,0,16,16
SPRITE 200,-50,-50,200
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\tiles\tile6.bmp",1
GET IMAGE 201,0,0,16,16
SPRITE 201,-50,-50,201
DELETE BITMAP 1
rem get test piece
LOAD BITMAP "bmp\tiles\tile2.bmp",1
GET IMAGE 202,0,0,16,16
SPRITE 202,-50,-50,202
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\tiles\tile8.bmp",1
GET IMAGE 203,0,0,16,16
SPRITE 203,-50,-50,203
DELETE BITMAP 1
rem SET SPRITE PRIORITY 302,1
rem get test piece
LOAD BITMAP "bmp\tiles\tile1.bmp",1
GET IMAGE 204,0,0,16,16
SPRITE 204,-50,-50,204
DELETE BITMAP 1
rem SET SPRITE PRIORITY 301,1
rem get test piece
LOAD BITMAP "bmp\tiles\tile3.bmp",1
GET IMAGE 205,0,0,16,16
SPRITE 205,-50,-50,205
DELETE BITMAP 1
rem SET SPRITE PRIORITY 309,1

rem get test piece
LOAD BITMAP "bmp\tiles\grass1.bmp",1
GET IMAGE 206,0,0,16,16
SPRITE 206,-50,-50,206
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\tiles\sand1.bmp",1
GET IMAGE 207,0,0,16,16
SPRITE 207,-50,-50,207
DELETE BITMAP 1

rem ******************************
rem ******get middle tiles********
rem ******************************
rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\doors\door1.bmp",1
GET IMAGE 208,0,0,16,16
SPRITE 208,-50,-50,208
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\lamps\lamp1.bmp",1
GET IMAGE 209,0,0,16,16
SPRITE 209,-50,-50,209
DELETE BITMAP 1

rem get test piece (furniture 6000-7000)
LOAD BITMAP "bmp\furniture\chair1.bmp",1
GET IMAGE 210,0,0,16,16
SPRITE 210,-50,-50,210
DELETE BITMAP 1

rem get test piece (furniture 6000-7000)
LOAD BITMAP "bmp\furniture\table1.bmp",1
GET IMAGE 211,0,0,16,16
SPRITE 211,-50,-50,211
DELETE BITMAP 1

rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\doors\door2.bmp",1
GET IMAGE 212,0,0,16,16
SPRITE 212,-50,-50,212
DELETE BITMAP 1

LOAD BITMAP "bmp\corpses\corpse1.bmp",1
GET IMAGE 213,0,0,16,16
SPRITE 213,-50,-50,213
DELETE BITMAP 1

rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\doors\door3.bmp",1
GET IMAGE 214,0,0,16,16
SPRITE 214,-50,-50,214
DELETE BITMAP 1

rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\player\player1-lightsabre.bmp",1
GET IMAGE 215,0,0,16,16
SPRITE 215,-50,-50,215
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\monsters\mummy1.bmp",1
GET IMAGE 216,0,0,16,16
SPRITE 216,-50,-50,216
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\furniture\sarkofag-part1.bmp",1
GET IMAGE 217,0,0,16,16
SPRITE 217,-50,-50,217
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\furniture\sarkofag-part2.bmp",1
GET IMAGE 218,0,0,16,16
SPRITE 218,-50,-50,218
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\furniture\grave1.bmp",1
GET IMAGE 219,0,0,16,16
SPRITE 219,-50,-50,219
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\monsters\skeleton1.bmp",1
GET IMAGE 220,0,0,16,16
SPRITE 220,-50,-50,220
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\monsters\skeleton2.bmp",1
GET IMAGE 221,0,0,16,16
SPRITE 221,-50,-50,221
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\trees\tree1.bmp",1
GET IMAGE 222,0,0,16,16
SPRITE 222,-50,-50,222
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\trees\tree2.bmp",1
GET IMAGE 223,0,0,16,16
SPRITE 223,-50,-50,223
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\trees\tree3.bmp",1
GET IMAGE 224,0,0,16,16
SPRITE 224,-50,-50,224
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\furniture\grave2.bmp",1
GET IMAGE 225,0,0,16,16
SPRITE 225,-50,-50,225
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\monsters\cyborg1.bmp",1
GET IMAGE 226,0,0,16,16
SPRITE 226,-50,-50,226
DELETE BITMAP 1

rem active piece
active_piece = 200

rem ******************************
rem *******get top tiles**********
rem ******************************
rem get cursor
LOAD BITMAP "editor\cursor.bmp",1
GET IMAGE 1,4,4,12,12
SPRITE 1,160,112,1
DELETE BITMAP 1
SET SPRITE PRIORITY 1,4
rem set sprite priority 1,1
OFFSET SPRITE 1,-4,-4
REM *****return from load_sprites*******
RETURN

+ Code Snippet

SYNC ON
SYNC RATE 60
BACKDROP OFF
SET DISPLAY MODE 320,240,32
GOSUB load_sprites
current_sprite_to_place = 20000
space_key_Stopper = 0
SPRITE 2,SPRITE X(1),SPRITE Y(1),200

rem main editor loop
DO

rem get scancode from keyboard
keypress = SCANCODE()
IF keypress = 0
 stopper = 0
ENDIF
SET CURSOR 0,0
PRINT SPRITE COLLISION(1,0)

GOSUB cursor_movement
GOSUB select_tile
GOSUB paint_tile
GOSUB save_map
rem end of main loop
SYNC
LOOP



cursor_movement:

rem set stopper to zero when no key is pressed
IF DOWNKEY() = 0 AND UPKEY() = 0 AND LEFTKEY() = 0 AND RIGHTKEY() = 0
 stopper_dir_keys = 0
ENDIF

rem up
IF UPKEY() = 1 AND stopper_dir_keys = 0
 FOR current_tile = 20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile),SPRITE Y(current_tile)+16,SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem down
IF DOWNKEY() = 1 AND stopper_dir_keys = 0
 FOR current_tile =  20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile),SPRITE Y(current_tile)-16,SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem left
IF LEFTKEY() = 1 AND stopper_dir_keys = 0
 FOR current_tile =  20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile)+16,SPRITE Y(current_tile),SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem right
IF RIGHTKEY() = 1
 FOR current_tile =  20000 TO 62000
  IF SPRITE EXIST(current_tile)
   SPRITE current_tile,SPRITE X(current_tile)-16,SPRITE Y(current_tile),SPRITE IMAGE(current_tile)
  ENDIF
 NEXT current_tile
 stopper_dir_keys = 1
 space_key_stopper = 0
ENDIF

rem return from cursor movement
RETURN


select_tile:
rem keypress 28 is enter
IF keypress = 28 AND stopper = 0
 active_piece = active_piece + 1
 stopper = 1
 DELETE SPRITE 2
 CLONE SPRITE active_piece,2
ENDIF

rem keypress 14 is backspace
IF keypress = 14 AND stopper = 0
 active_piece = active_piece - 1
 stopper = 1
 DELETE SPRITE 2
 CLONE SPRITE active_piece,2
ENDIF
SPRITE 2,SPRITE X(1),SPRITE Y(1),SPRITE IMAGE(active_piece)

rem return from select_tile
RETURN


paint_tile:
rem keypress 57 is space
IF keypress = 57 AND space_key_stopper = 0
 CLONE SPRITE 2,current_sprite_to_place
 SPRITE current_sprite_to_place,SPRITE X(1),SPRITE Y(1),SPRITE IMAGE(2)
 current_sprite_to_place = current_sprite_to_place + 1
 space_key_stopper = 1
ENDIF

rem return from paint_tile
RETURN


REM ******FILE STUFF TRY OUT :P********
save_map:

rem keypress 31 is s
IF keypress = 31
 IF FILE EXIST("map1.map")
  DELETE FILE "map1.map"
 ENDIF
 OPEN TO WRITE 1,"map1.map"
 FOR current_tile_to_save = 20000 to 62000
  IF SPRITE EXIST(current_tile_to_save)
   WRITE LONG 1,SPRITE X(current_tile_to_save)
   WRITE LONG 1,SPRITE Y(current_tile_to_save)
   WRITE LONG 1,SPRITE IMAGE(current_tile_to_save)
  ENDIF
 NEXT current_tile_to_save
 CLOSE FILE 1
ENDIF

rem return from save file
RETURN











REM *************************
REM *****LOAD SPRITES********
REM *************************
load_sprites:
rem ******************************
rem *****get lowest tile**********
rem ******************************


rem ******************************
rem ******get bottom tiles********
rem ******************************

rem get test piece
LOAD BITMAP "bmp\tiles\tile7.bmp",1
GET IMAGE 200,0,0,16,16
SPRITE 200,-50,-50,200
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\tiles\tile6.bmp",1
GET IMAGE 201,0,0,16,16
SPRITE 201,-50,-50,201
DELETE BITMAP 1
rem get test piece
LOAD BITMAP "bmp\tiles\tile2.bmp",1
GET IMAGE 202,0,0,16,16
SPRITE 202,-50,-50,202
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\tiles\tile8.bmp",1
GET IMAGE 203,0,0,16,16
SPRITE 203,-50,-50,203
DELETE BITMAP 1
rem SET SPRITE PRIORITY 302,1
rem get test piece
LOAD BITMAP "bmp\tiles\tile1.bmp",1
GET IMAGE 204,0,0,16,16
SPRITE 204,-50,-50,204
DELETE BITMAP 1
rem SET SPRITE PRIORITY 301,1
rem get test piece
LOAD BITMAP "bmp\tiles\tile3.bmp",1
GET IMAGE 205,0,0,16,16
SPRITE 205,-50,-50,205
DELETE BITMAP 1
rem SET SPRITE PRIORITY 309,1

rem get test piece
LOAD BITMAP "bmp\tiles\grass1.bmp",1
GET IMAGE 206,0,0,16,16
SPRITE 206,-50,-50,206
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\tiles\sand1.bmp",1
GET IMAGE 207,0,0,16,16
SPRITE 207,-50,-50,207
DELETE BITMAP 1


rem ******************************
rem ******get middle tiles********
rem ******************************
rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\doors\door1.bmp",1
GET IMAGE 208,0,0,16,16
SPRITE 208,-50,-50,208
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\lamps\lamp1.bmp",1
GET IMAGE 209,0,0,16,16
SPRITE 209,-50,-50,209
DELETE BITMAP 1

rem get test piece (furniture 6000-7000)
LOAD BITMAP "bmp\furniture\chair1.bmp",1
GET IMAGE 210,0,0,16,16
SPRITE 210,-50,-50,210
DELETE BITMAP 1

rem get test piece (furniture 6000-7000)
LOAD BITMAP "bmp\furniture\table1.bmp",1
GET IMAGE 211,0,0,16,16
SPRITE 211,-50,-50,211
DELETE BITMAP 1

rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\doors\door2.bmp",1
GET IMAGE 212,0,0,16,16
SPRITE 212,-50,-50,212
DELETE BITMAP 1


LOAD BITMAP "bmp\corpses\corpse1.bmp",1
GET IMAGE 213,0,0,16,16
SPRITE 213,-50,-50,213
DELETE BITMAP 1

rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\doors\door3.bmp",1
GET IMAGE 214,0,0,16,16
SPRITE 214,-50,-50,214
DELETE BITMAP 1

rem get test piece (doors 5000-5300)
LOAD BITMAP "bmp\player\player1-lightsabre.bmp",1
GET IMAGE 215,0,0,16,16
SPRITE 215,-50,-50,215
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\monsters\mummy1.bmp",1
GET IMAGE 216,0,0,16,16
SPRITE 216,-50,-50,216
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\furniture\sarkofag-part1.bmp",1
GET IMAGE 217,0,0,16,16
SPRITE 217,-50,-50,217
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\furniture\sarkofag-part2.bmp",1
GET IMAGE 218,0,0,16,16
SPRITE 218,-50,-50,218
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\furniture\grave1.bmp",1
GET IMAGE 219,0,0,16,16
SPRITE 219,-50,-50,219
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\monsters\skeleton1.bmp",1
GET IMAGE 220,0,0,16,16
SPRITE 220,-50,-50,220
DELETE BITMAP 1

rem get cursor
LOAD BITMAP "bmp\monsters\skeleton2.bmp",1
GET IMAGE 221,0,0,16,16
SPRITE 221,-50,-50,221
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\trees\tree1.bmp",1
GET IMAGE 222,0,0,16,16
SPRITE 222,-50,-50,222
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\trees\tree2.bmp",1
GET IMAGE 223,0,0,16,16
SPRITE 223,-50,-50,223
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\trees\tree3.bmp",1
GET IMAGE 224,0,0,16,16
SPRITE 224,-50,-50,224
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\furniture\grave2.bmp",1
GET IMAGE 225,0,0,16,16
SPRITE 225,-50,-50,225
DELETE BITMAP 1

rem get test piece
LOAD BITMAP "bmp\monsters\cyborg1.bmp",1
GET IMAGE 226,0,0,16,16
SPRITE 226,-50,-50,226
DELETE BITMAP 1

rem active piece
active_piece = 200

rem ******************************
rem *******get top tiles**********
rem ******************************
rem get cursor
LOAD BITMAP "editor\cursor.bmp",1
GET IMAGE 1,4,4,12,12
SPRITE 1,160,112,1
DELETE BITMAP 1
SET SPRITE PRIORITY 1,4
rem set sprite priority 1,1
OFFSET SPRITE 1,-4,-4
REM *****return from load_sprites*******
RETURN

and it gets very slow when I have a lot of tiles (sprites), I think it is because I move them all at one time.

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Pincho Paxton

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Joined: 8th Dec 2002

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Posted: 5th Oct 2004 07:52

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search for

copy bitmap

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Cybermind

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Joined: 28th Nov 2002

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Posted: 5th Oct 2004 23:17

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are bitmaps faster?

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Pincho Paxton

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Posted: 6th Oct 2004 03:07

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Yeah, copying a bitmap is the correct way to scroll a tiled background. Or try a 3D plain.

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100% Pure Dave

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Location: Perth, Australia

Posted: 13th Oct 2004 14:58

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actually u should use paste image, i use the paste image command when building a 2d scene based on tiles and even with a 3 layered map with animated tiles it is extremely fast

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Emperor Baal

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Posted: 14th Oct 2004 08:33

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I noticed there's allmost no difference between paste image and sprite when using darkbasic professional. And believe me, moving a lot of sprites is what I'm doing right now, megaman redemption has a LOT of sprites moving on the map and I still get 600+ FPS.

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Agent

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Posted: 18th Oct 2004 04:51 Edited at: 18th Oct 2004 04:54

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Some people's concept of the words 'a lot' can change. To a new programmer, a lot of sprites might be eight or nine. To me, a coder working almost exclusively in 2D my whole career, we're talking about several hundred.

That many sprites does eat DBP alive, but with some clever programming and some efficient logic it can be done with respectable frame rate. My current project displays a minimum of 160 images every cycle and goes up to a maximum of about 400. I'm getting around 80 frames on a below average machine (1.4Ghz Athlon), and with all 400 images visible at the same time it drops to about 70.

Efficient code is the key. Do you really need to move every sprite EVERY cycle? Only touch the ones that have actually moved, and even then you can try working with only a few sprites per cycle. Having the sprites present slows it down a little, but performing actual operations on the sprites slows it down a lot. Ignore the ones you don't need to change on a per cycle basis and only work with the ones which actually require an update.

I will help you with optimised logic. I've had a brief glance over your source. First of all, it looks like you are trying to slap down several tens of thousands of sprites every single cycle. I can't see how it's possible to require that many - if you are using a tilebased map, and it looks like you are, you can't need more than a few hundred at a time, depending on your screen resolution. Why are you placing so many sprites in one hit?

That's the single biggest problem you have with your code.

As best I can tell, you're not even using a tiled background (although it looks like you're trying to - the code is wrong). From where I sit, it appears you are in fact drawing a pixellated background, in which you are setting each individual pixel on the screen every cycle. This is not on

What is the size (in pixels) of the tiles you are using to compose your map? Your screen res is 320x240, so take as an example a tilesize of 10x10. At this res, filling the entire screen with tiles will require 768 images. I expect there's little chance your tiles are so small; more likely they are 32x32 or 64x64, as per generally accepted standard. In this case, you need less than a hundred images to paint the screen.

My first question to you, then, is why are you drawing forty two thousand sprites every cycle (ie, when you hit an arrow key) ?

I'll help you if you tell me the significance of the number 42000, and what size your tiles are.

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Emperor Baal

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Posted: 18th Oct 2004 09:35 Edited at: 18th Oct 2004 09:36

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@Agent

If you were talking about me, you don't have to worry. I use a lot of sprites (60+ at the same time on one screen at least, normally 100 or so) and I use a lot of optimized routines.
I also utilize a time-based system. My game only updates certain "special effect" sprite layers when it's main loop took less than (1 second / 60fps = 16.66ms). Then it will draw a new one and re-sync it.
For collision I use a very heavy optimized routine that checks an array and decides what to do (wall / floor = normal, spike = dead)
For collision against enemies/items I use a list. The enemy sprites start at number 400. So I placed them all in groups of 20: 400-419, 420-439 and I check collision for the group that's the first in the list. When it's done it's placed at the end of the list. This means collision is calculated 20 times each second for 1 group.

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Agent

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Posted: 19th Oct 2004 03:36

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Emperor, I was actually talking to Cybermind - he used the term 'a lot' in his question

You use a similar method as I do - using a queue to perform a smaller chunk of operations per cycle, except my system reorders the queue every so often depending on what's on the screen at the time and what actually requires updating (ie, something that isn't moving at that time and is off screen is constantly moved backward in the queue and never reaches the top). Saves even more time

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Pincho Paxton

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Posted: 19th Oct 2004 05:30

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That's why I said.......

Copy Bitmap....

You can move 1000 sprites as a bitmap if it's a scroll routine, you get no slowdown. Plus the secret is, you only have to paste 4 of them. The 4 new ones that are about to scroll onto the screen.

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Emperor Baal

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Posted: 20th Oct 2004 08:31 Edited at: 20th Oct 2004 08:31

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Copy bitmap isn't exactly a fast command. When using a 1280x1024 bitmap it won't do any miracles.

And you'll have a wonderfull time animating background tiles/objects

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2D All the way! / many sprites slow down my game