AGK optimisation ? - GameCreators Forum

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Blendman

10

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Joined: 17th Feb 2014

Location: Arkeos

Posted: 6th Jul 2016 11:50

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Hi

In some of my game level, the fps drop at 30 (instead of 60). I know my PC is really slow ^^, but I would like to know if you know technic to optimisate a game or a level.

I have tried :

+ Code Snippet

For i=0 to Tree.length
	n = tree[i]
	if GetDistance3D(GetObjectX(player),getobjectY(player),getobjectZ(player),GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
		SetObjectVisible(n,1)
	else
		SetObjectVisible(n,0)
	endif
next

But :
1) it's not very accurate
2) the fps drop when the loop is on this part (to test the distance between the player/camera and the objects).

So you have some ideas to get a better fps ?
- For example, how can I do a LOD system ?
- perhap's I could turn off the physic for objects far of the player ?

my scene is "only" :
- 40000 polygons and 220 objects (with box physic (250 static box, 1 ground (terrain with 6000 poly) and 1 character (1000 poly)).

Here is main loop (test) :

do
        
    if getpointerpressed() or GetRawJoystickButtonPressed(1,1)
        jumped=1
        Jump3DPhysicsCharacterController(player)   
    endif
   
	joystick_y# = GetRawJoystickY(1)
	joystick_x# = GetRawJoystickX(1)
	Move3DPhysicsCharacterController(Player,0,0)
	if joystick_y#>0 
		Move3DPhysicsCharacterController(Player,1,u)
	endif
	if joystick_y#<0 
		Move3DPhysicsCharacterController(Player,2,u)
	endif
	if joystick_x#<-r#  		
		finalRotation = finalRotation - rotationInc
        Rotate3DPhysicsCharacterController( Player, finalRotation )
        
	endif
	if joystick_x#>r# 		
		finalRotation = finalRotation + rotationInc
        Rotate3DPhysicsCharacterController( Player, finalRotation )
	endif

Step3DPhysicsWorld()

setcameraposition(1,getobjectworldx(ObjCam),getobjectworldy(ObjCam),getobjectworldz(ObjCam))
    setcameralookat(1,getobjectx(player),getobjecty(player),getobjectz(player),0)
    setpointlightposition(1,getobjectx(player),getobjecty(player)+2,getobjectz(player))
   
	For i=0 to Tree.length // 200 trees in the levels
		n = tree[i]
		if GetDistance3D(GetObjectX(player),getobjectY(player),getobjectZ(player),GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
			SetObjectVisible(n,1)
		else
			SetObjectVisible(n,0)
		endif
	next
	For i=0 to House.length // 50 houses in the level
		n = House[i]
		if GetDistance3D(GetObjectX(player),getobjectY(player),getobjectZ(player),GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
			SetObjectVisible(n,1)
		else
			SetObjectVisible(n,0)
		endif
	next
 
	Print(Str(ScreenFPS())+"|"+str(GetVerticesProcessed())+" | Phys : "+str(Get3DPhysicsTotalObjects())+" | Poly : "+str(GetPolygonsDrawn()))
   	Print(str(joystick_y#)+"/"+str(joystick_x#))

Sync()
loop

+ Code Snippet

do
        
    if getpointerpressed() or GetRawJoystickButtonPressed(1,1)
        jumped=1
        Jump3DPhysicsCharacterController(player)   
    endif
   
	joystick_y# = GetRawJoystickY(1)
	joystick_x# = GetRawJoystickX(1)
	Move3DPhysicsCharacterController(Player,0,0)
	if joystick_y#>0 
		Move3DPhysicsCharacterController(Player,1,u)
	endif
	if joystick_y#<0 
		Move3DPhysicsCharacterController(Player,2,u)
	endif
	if joystick_x#<-r#  		
		finalRotation = finalRotation - rotationInc
        Rotate3DPhysicsCharacterController( Player, finalRotation )
        
	endif
	if joystick_x#>r# 		
		finalRotation = finalRotation + rotationInc
        Rotate3DPhysicsCharacterController( Player, finalRotation )
	endif
	  
	

	Step3DPhysicsWorld()

    setcameraposition(1,getobjectworldx(ObjCam),getobjectworldy(ObjCam),getobjectworldz(ObjCam))
    setcameralookat(1,getobjectx(player),getobjecty(player),getobjectz(player),0)
    setpointlightposition(1,getobjectx(player),getobjecty(player)+2,getobjectz(player))
   
	For i=0 to Tree.length // 200 trees in the levels
		n = tree[i]
		if GetDistance3D(GetObjectX(player),getobjectY(player),getobjectZ(player),GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
			SetObjectVisible(n,1)
		else
			SetObjectVisible(n,0)
		endif
	next
	For i=0 to House.length // 50 houses in the level
		n = House[i]
		if GetDistance3D(GetObjectX(player),getobjectY(player),getobjectZ(player),GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
			SetObjectVisible(n,1)
		else
			SetObjectVisible(n,0)
		endif
	next
 
	Print(Str(ScreenFPS())+"|"+str(GetVerticesProcessed())+" | Phys : "+str(Get3DPhysicsTotalObjects())+" | Poly : "+str(GetPolygonsDrawn()))
   	Print(str(joystick_y#)+"/"+str(joystick_x#))

    Sync()
loop

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BatVink

Moderator

21

Years of Service

User Offline

Joined: 4th Apr 2003

Location: Gods own County, UK

Posted: 6th Jul 2016 12:06

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You could check only a small subset of the objects each time...

+ Code Snippet

inc cycle, 1
if cycle > 59 then cycle = 0
For i=cycle to Tree.length step 60
    n = tree[i]
    if GetDistance3D(GetObjectX(player),getobjectY(player),getobjectZ(player),GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
        SetObjectVisible(n,1)
    else
        SetObjectVisible(n,0)
    endif
next

Here, you are still checking all objects every second at 60FPS.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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BraindeaD

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Joined: 30th Mar 2008

Location:

Posted: 6th Jul 2016 16:32 Edited at: 6th Jul 2016 16:36

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Not sure if this helps, but try to store the player coords in variables before the for instead ask for them each for loop:

+ Code Snippet

px=GetObjectX(player)
py=getobjectY(player)
pz=getobjectZ(player)

For i=0 to Tree.length
    n = tree[i]
    if GetDistance3D(px,py,pz,GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
        SetObjectVisible(n,1)
    else
        SetObjectVisible(n,0)
    endif
next

Similar to the BatVink's method, you can use a value in the tree type structure to see if this element must be checked in this loop, i.e.:

+ Code Snippet

checkTreeValue=checkTreeValue+1
if checkTreeValue>3 then checkTreeValue=0

px=GetObjectX(player)
py=getobjectY(player)
pz=getobjectZ(player)

For i=0 to Tree.length
    n = tree[i]
    if n.mustBeChecked=checkTreeValue
        if GetDistance3D(px,py,pz,GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
            SetObjectVisible(n,1)
        else
            SetObjectVisible(n,0)
        endif
    endif
next

Hope it helps.
Best Regards.

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Van B

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22

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Joined: 8th Oct 2002

Location: Sunnyvale

Posted: 6th Jul 2016 17:07

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Get distance will be a fairly taxing command, basically a square root function which is not ideal when your trying to save FPS. Perhaps just do a X,Z range check instead and see if that helps... along with adding a limit to the object checks per loop as suggested of course.

Like...
If abs(x-GetObjectX(n))>1000
SetObjectVisible(n,0)
else
If abs(z-GetObjectZ(n))>1000
SetObjectVisible(n,0)
else
SetObjectVisible(n,1)
endif
endif

If your game is glitching really badly, then perhaps adopting timer based movement is an idea - at least it'll blend those glitches a bit and improve consistency. Time based movement is probably not ideal for games primarily designed for phones and tablets, it would increase battery usage - maybe an idea to allow a fixed frame rate for mobile devices as well, that would be a case of just setting the frame rate, timer based movement would still work the same way.

The code is dark and full of errors

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SoftMotion3D

AGK Developer

19

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Joined: 24th Aug 2005

Location: Calgary,Alberta

Posted: 6th Jul 2016 23:36

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in agk i find the for x loops the major fps kill. try to merge code and use less loops per sync if possible. an example would be to check your house lengths and tree lengths in the same for x loop. another way to speed things up is to merge all your 3d models into a single model as agk can process a single object composed of all your level geometry faster then processing it over multiple objects. I also agree with vanb that too many square root calls per sync can hurt a fair bit. maybe check a section of them per sync but not all of them.

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Kevin Picone

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Joined: 27th Aug 2002

Location: Australia

Posted: 7th Jul 2016 06:07

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in a runtime it's important to tweak the number of operations out of such brute forces loops. The cost of polling an array, calling function is high, so a you can make it easier on the runtime by storing values that aren't changing (within the inner loop) in temp variables. So the runtime has less work to do when executung the loop.

eg.

+ Code Snippet

 
    Count=Tree.length // 200 trees in the levels
   px=GetObjectX(player)
   py=getobjectY(player)
   pz=getobjectZ(player)
    For i=0 to Count
        n = tree[i]
        if GetDistance3D(px,py,pz,GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000
            SetObjectVisible(n,1)
        else
            SetObjectVisible(n,0)
        endif
    next

IF/ELSE/ENDIF block can be removed also, which will remove at least two branches (depending upon the course the code takes) from the inner loop.

eg.

+ Code Snippet

 
    Count=Tree.length // 200 trees in the levels
   px=GetObjectX(player)
   py=getobjectY(player)
   pz=getobjectZ(player)
    For i=0 to Count
          n = tree[i]
          SetObjectVisible(n, GetDistance3D(px,py,pz,GetObjectX(n),GetObjectY(n),GetObjectZ(n))<1000)
    next

so we can make the loop look fairly leen, but it's still a brute force operation.

a better solution is by partitioning the space. Depending the size of the game world you can get away with a 1D or 2D partition. Which just means running through and storing objects in lists, Then we work out which list we're closest too and only check that group of objects.

for some ramble Crash crouse in optimization

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