Slow with hundreds of cubes

Blitz3D Forums/Blitz3D Programming/Slow with hundreds of cubes

Peb	(Posted 2010) [#1]

I am writing a program with 5000 cubes (entities).
It ran fine, but after adding these cubes , it gets really slow when I run it
.
Should I operate with meshes instead of entities?
Should I compile the program to get better speed?

Thanks in advance for any help!

---EDIT:---
My processor and graphics card are quite uptodate and fast.

Last edited 2010

K	(Posted 2010) [#2]

"Should I operate with meshes instead of entities?"
What do you mean?, a mesh is an entity. Do you mean all the cubes added together as one mesh(=entity)?
One thing I'd recommend is tweening, but I don't know exactly what you mean.

Last edited 2010

Ross C

(Posted 2010) [#3]

Your creating 5000 surafces essentiallty, which is going to be really slow. Why do you need to create 5000 cubes though?

SLotman

(Posted 2010) [#4]

Create 1 cube, then use copyentity to create the others - this should keep the surface count low and speed things up.

This runs at 60 fps here for me:

Const KEY_UP=200
Const KEY_LEFT=203
Const KEY_RIGHT=205
Const KEY_DOWN=208

Global Framecounter_counter=0, Framecounter_time=0, Framecounter_framerate=0


Graphics3D 800,600,32,2


cube=CreateCube()

For f=1 To 4999
	cube2=CopyEntity(cube)
	PositionEntity cube2, Rand(-1000,1000), Rand(-1000,1000), Rand(-1000,1000)
Next

camera=CreateCamera()


While Not KeyHit(1)
	Cls
	UpdateWorld
	RenderWorld

	DisplayFPS()	
	Flip
		
	If KeyDown(KEY_UP) Then MoveEntity camera,0,0,1
	If KeyDown(KEY_DOWN) Then MoveEntity camera,0,0,-1
	If KeyDown(KEY_LEFT) Then TurnEntity camera,0,1,0
	If KeyDown(KEY_RIGHT) Then TurnEntity camera,0,-1,0	
Wend

ClearWorld
End


Function DisplayFPS()
	Framecounter_counter=Framecounter_counter+1
	If Framecounter_time=0 Then Framecounter_time=MilliSecs()
	If Framecounter_time+1001 < MilliSecs() Then
		Framecounter_framerate=Framecounter_counter
		Framecounter_counter=0
		Framecounter_time=MilliSecs()
	EndIf
	
	u#=(TotalVidMem()-AvailVidMem())/1048576
	num$=Str(u#)+"00"
	num$=Left(num$,Instr(num$,".")+2)
	
	Color 255,255,255
	Text 10,10,"FPS: "+Framecounter_framerate + " Tris:"+TrisRendered()+ " Video Used:"+num$+"Mb"
End Function

Last edited 2010

jhocking

(Posted 2010) [#5]

Why do you need to create 5000 cubes though?

Maybe he's making a Minecraft clone.

Rob	(Posted 2010) [#6]

minecraft is best done with quads in a single surface using a texture atlas. optimisation: If a side of the cube isn't touching any air, don't render it.

Peb	(Posted 2010) [#7]

Many thanks for the help. And Joe was guesing correctly.