Object edges shudder and jitter on camera movement

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TcM Trinity

14

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Joined: 7th Jan 2010

Location: Canada

Posted: 8th Jan 2010 00:04

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Hi there!

I've got a problem with objects distorting. Looks good when I don't move the camera, but as soon as I start to move it, the edges get all jagged and shiftie.

Here is the test code that I most recently tried as an example.

I picked it up from here:
http://forum.thegamecreators.com/?m=forum_view&t=140481&b=7

+ Code Snippet

`Variables for camera angle and mouse movement.
CamY as Float
CamX as Float
MMoveX as Float
MMoveY as Float

`Init.
Set Display Mode 1024, 768, 32
Sync On
Sync Rate 60

`Make an object so you can tell that the camera is moving.
Make Object Cube 1, 10.0

`Main loop.
Do
	`Check for key presses and move camera accordingly.
	If KeyState( 17 )
		Move Camera 1.0
	EndIf
	If KeyState( 30 )
		Turn Camera Left 90.0
		Move Camera 1.0
		Turn Camera Right 90.0
	EndIf
	If KeyState( 31 )
		Move Camera -1.0
	EndIf
	If KeyState( 32 )
		Turn Camera Right 90.0
		Move Camera 1.0
		Turn Camera Left 90.0
	EndIf
	`Get camera angle and mouse movement and rotate camera.
	CamX = Camera Angle X( )
	CamY = Camera Angle Y( )
	MMoveX = MouseMoveX( )
	MMoveY = MouseMoveY( )
	YRotate Camera CamY + ( MMoveX / 2 )
	XRotate Camera CamX + ( MMoveY / 2 )
	
	`Update screen.
	Sync
Loop

It seems like no matter what I do it goes ultra jagged even when just rotating the camera with the mouse. Same problem when load any .x or .dbo objects.

I attached a screenshot of what I mean. (Not the best eh? But its right hard to cap it at the good moment)

And that is just a minor jitter-jag. Normally the problem is worst when I move to the sides with the mouse, up down ain't so bad.

I've tried just basic geometry as in the code above, .x and .dbo models. I tried both 3DS -> Panda .x and Blender -> .x, as well as loading the models from DarkMatter.

Sys Specs: Core 2 Duo 2.5, Nvidia 9600 GSO, Vista Ultimate, 4gb ram, twined 1tb hdds. Screen is a ViewSonic 22" wide, native resolution 1680 * 1050.

Any insight into this problem would be greatly appreciated!

Trinity C.

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chafari

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18

Years of Service

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Joined: 2nd May 2006

Location: Canary Islands

Posted: 8th Jan 2010 11:07

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I think that is normal....I you texture objects and you put some more objects spread out in the scene, you will see that in a different aspect.I added some objects to the escene, and it looks completly different.

Have a look at it.

//Floor texture
ink rgb(150,140,130),1
box 0,0,20,20
ink rgb(90,70,60),1
line 10,0,10,10
line 0,9,20,9
line 0,19,20,19
line 0,10,0,20
get image 1,0,0,20,20

//red light
ink rgb(80,80,80),1
box 0,0,20,50
ink rgb(255,0,0),1
for i= 1 to 5
ellipse 10,10,i,i
next i

get image 2,5,0,20,50,1
get image 5,10,10,20,20,1
ink rgb(0,255,0),1
for i= 1 to 5
ellipse 18,3,i,i
next i
get image 3,6,0,20,16

for a= 1 to 10
for i= 1 to 10
paste image 1,-20+i*20,-20+a*20
next i
next a
get image 1,0,0,200,200
//seting lights
set ambient light 50
hide light 0
//----objetos---------
`floor
 make object box 1,50,1,50
 texture object 1,1
set light mapping on 1,3

`column
make object cylinder 2,6
scale object 2,100,400,100
position object 2,0,10,0
texture object 2,1
set light mapping on 2,2

`light bulb
make object sphere 3,1:set object emissive 3,rgb(255,0,0)
position object 3,-1.5,17,-2.5
`roof
make object box 4,30,0.5,20
texture object 4,1
position object 4,0,22,0
set light mapping on 4,5

position camera 5,5,5
point camera 0,0,0
do
color backdrop rgb(0,0,0)

// CAMERA CONTROLS  ****************************
	`Check for key presses and move camera accordingly.
	If KeyState( 17 )
		Move Camera 0.2
	EndIf
	If KeyState( 30 )
		Turn Camera Left 90.0
		Move Camera 1.0
		Turn Camera Right 90.0
	EndIf
	If KeyState( 31 )
		Move Camera -0.2
	EndIf
	If KeyState( 32 )
		Turn Camera Right 90.0
		Move Camera 1.0
		Turn Camera Left 90.0
	EndIf
	`Get camera angle and mouse movement and rotate camera.
	CamX = Camera Angle X( )
	CamY = Camera Angle Y( )
	MMoveX = MouseMoveX( )
	MMoveY = MouseMoveY( )
	YRotate Camera CamY + ( MMoveX / 2 )
	XRotate Camera CamX + ( MMoveY / 2 )
REM ********************************************

sync
loop

+ Code Snippet

//Floor texture
ink rgb(150,140,130),1
box 0,0,20,20
ink rgb(90,70,60),1
line 10,0,10,10
line 0,9,20,9
line 0,19,20,19
line 0,10,0,20
get image 1,0,0,20,20

//red light
ink rgb(80,80,80),1
box 0,0,20,50
ink rgb(255,0,0),1
for i= 1 to 5
ellipse 10,10,i,i
next i

get image 2,5,0,20,50,1
get image 5,10,10,20,20,1
ink rgb(0,255,0),1
for i= 1 to 5
ellipse 18,3,i,i
next i
get image 3,6,0,20,16



for a= 1 to 10
for i= 1 to 10
paste image 1,-20+i*20,-20+a*20
next i
next a
get image 1,0,0,200,200
//seting lights
set ambient light 50
hide light 0
//----objetos---------
`floor
 make object box 1,50,1,50
 texture object 1,1
set light mapping on 1,3

`column
make object cylinder 2,6
scale object 2,100,400,100
position object 2,0,10,0
texture object 2,1
set light mapping on 2,2

`light bulb
make object sphere 3,1:set object emissive 3,rgb(255,0,0)
position object 3,-1.5,17,-2.5
`roof
make object box 4,30,0.5,20
texture object 4,1
position object 4,0,22,0
set light mapping on 4,5

position camera 5,5,5
point camera 0,0,0
do
color backdrop rgb(0,0,0)

// CAMERA CONTROLS  ****************************
	`Check for key presses and move camera accordingly.
	If KeyState( 17 )
		Move Camera 0.2
	EndIf
	If KeyState( 30 )
		Turn Camera Left 90.0
		Move Camera 1.0
		Turn Camera Right 90.0
	EndIf
	If KeyState( 31 )
		Move Camera -0.2
	EndIf
	If KeyState( 32 )
		Turn Camera Right 90.0
		Move Camera 1.0
		Turn Camera Left 90.0
	EndIf
	`Get camera angle and mouse movement and rotate camera.
	CamX = Camera Angle X( )
	CamY = Camera Angle Y( )
	MMoveX = MouseMoveX( )
	MMoveY = MouseMoveY( )
	YRotate Camera CamY + ( MMoveX / 2 )
	XRotate Camera CamX + ( MMoveY / 2 )
REM ********************************************

sync
loop

learning every day

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TcM Trinity

14

Years of Service

User Offline

Joined: 7th Jan 2010

Location: Canada

Posted: 8th Jan 2010 16:31

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Wow. Now I've got to admit, that looks smoother and cleaner than anything I've put together thus far.

I also took a pair of simple cubes and textured them and loaded them up along with it(as .x's). That didn't work so well until I added the a line for my objects 'set light mapping on', as you had done in your example for your objects. Worked like a charm.

Thank you very much for the help. I think its time I go back to the basics and start learning from scratch again. The simple lighting and drawing accomplished things I thought could only be done with textures.

Question??: The objects I had previously made now look fine when I load them into your code. Could that have something to do with the lighting, backdrop, and light mapping? I had skipped the lighting in my expiraments as I thought a smooth box was the good starting place, but seeing that with lighting and backdrop the objects look ok... could that be part of the problem I was having?

Again chafari, thanks for the help, I really appreciate it.

Here is the code that I added right above the start of the do loop to include my .x objects:

+ Code Snippet

` I added These Lines
load object "Stuff/TestMest.x",12024
position object 12024,0,-25,0
set light mapping on 12024,3
` End of my addition

Trinity C.

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chafari

Valued Member

18

Years of Service

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Joined: 2nd May 2006

Location: Canary Islands

Posted: 9th Jan 2010 14:21

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When you have a biger map, it looks more realistic than just a box.The textures make them look better as well.Here the lightmapping was manually, but you can get them with so many programs.

I,m glag to help you somehow.

cheers.

learning every day

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