[bug] 2.0.19 CreateObjectFromObjectMesh

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Preben

AGK Studio Developer

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Posted: 31st May 2016 11:45

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No collision data is created when using CreateObjectFromObjectMesh.

test:
ggobjectid[ml] = LoadObjectWithChildren( “/gameguru/entitybank/Foliage/palm06.x” )
ggmedialod2id[ml] = CreateObjectFromObjectMesh( ggobjectid[ml],2 )

New object look fine but collision do not work.

best regards Preben Eriksen,

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Preben

AGK Studio Developer

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Posted: 10th Jun 2016 13:21

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bump

best regards Preben Eriksen,

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Paul Johnston

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Posted: 15th Jun 2016 13:42

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I had a look but the command to generate collision data is begin called, so it is likely something specific with the model. Do you have an example I can test?

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Preben

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Posted: 17th Jun 2016 10:24

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Thanks , i did some more test and noticed that this is not only related to CreateObjectFromObjectMesh , but to any objects if you do it like this:

obj = CreateObjectFromObjectMesh( ggobjectid[ml],2 )
SetObjectCollisionMode( obj , 0)
testobj = InstanceObject( obj )

After this there is no way to enable coillision on testobj , even if you enable collison on both obj and testobj , coillision will never work.

I will just enable collision before Instance so its not really a problem. but perhaps you should generate the collision data ( if not already set ) when SetObjectCollisionMode( testobj ,1) is called

best regards Preben Eriksen,

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Paul Johnston

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Joined: 16th Nov 2002

Location: United Kingdom

Posted: 17th Jun 2016 14:28

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I can't replicate it with this code

SetVirtualResolution(1024,768)
SetScissor(0,0,0,0)
SetClearColor( 0,0,0 )

CreateObjectBox( 1, 10, 10, 10 )
SetObjectCollisionMode(1,0)
InstanceObject(2,1)
SetObjectPosition(2,15,0,0)
SetObjectCollisionMode(1,1)
SetObjectCollisionMode(2,1)

do
	
    // control the camera
    if ( GetRawKeyState( 87 ) ) then MoveCameraLocalZ( 1, 0.2 )
    if ( GetRawKeyState( 83 ) ) then MoveCameraLocalZ( 1, -0.2 )

if ( GetRawKeyState( 65 ) ) then MoveCameraLocalX( 1, -0.2 )
    if ( GetRawKeyState( 68 ) ) then MoveCameraLocalX( 1, 0.2 )

if ( GetRawKeyState( 81 ) ) then MoveCameraLocalY( 1, -0.2 )
    if ( GetRawKeyState( 69 ) ) then MoveCameraLocalY( 1, 0.2 )

if ( GetPointerPressed() )
        startx# = GetPointerX()
        starty# = GetPointerY()
        angx# = GetCameraAngleX(1)
        angy# = GetCameraAngleY(1)
        pressed = 1
    endif

if ( GetPointerState() = 1 )
        fDiffX# = (GetPointerX() - startx#)/4.0
        fDiffY# = (GetPointerY() - starty#)/4.0

newX# = angx# + fDiffY#
        if ( newX# > 89 ) then newX# = 89
        if ( newX# < -89 ) then newX# = -89
        SetCameraRotation( 1, newX#, angy# + fDiffX#, 0 )
    endif
    
    DrawBox( 510,382,514,385, 0, 0, 0, 0, 1 )
    DrawBox( 511,383,513,384, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 1 )	
        
    oldx# = GetCameraX(1)
    oldy# = GetCameraY(1)
    oldz# = GetCameraZ(1)
    
    MoveCameraLocalZ(1, 100)
    
    newx# = GetCameraX(1)
    newy# = GetCameraY(1)
    newz# = GetCameraZ(1)
    
    MoveCameraLocalZ(1, -100)
    
    hit = ObjectRayCast( 0, oldx#, oldy#, oldz#, newx#, newy#, newz# )
    
    Print(hit)
    Print(ScreenFPS())
    sync()
loop

+ Code Snippet

SetVirtualResolution(1024,768)
SetScissor(0,0,0,0)
SetClearColor( 0,0,0 )

CreateObjectBox( 1, 10, 10, 10 )
SetObjectCollisionMode(1,0)
InstanceObject(2,1)
SetObjectPosition(2,15,0,0)
SetObjectCollisionMode(1,1)
SetObjectCollisionMode(2,1)

do
	
    // control the camera
    if ( GetRawKeyState( 87 ) ) then MoveCameraLocalZ( 1, 0.2 )
    if ( GetRawKeyState( 83 ) ) then MoveCameraLocalZ( 1, -0.2 )

    if ( GetRawKeyState( 65 ) ) then MoveCameraLocalX( 1, -0.2 )
    if ( GetRawKeyState( 68 ) ) then MoveCameraLocalX( 1, 0.2 )

    if ( GetRawKeyState( 81 ) ) then MoveCameraLocalY( 1, -0.2 )
    if ( GetRawKeyState( 69 ) ) then MoveCameraLocalY( 1, 0.2 )

    if ( GetPointerPressed() )
        startx# = GetPointerX()
        starty# = GetPointerY()
        angx# = GetCameraAngleX(1)
        angy# = GetCameraAngleY(1)
        pressed = 1
    endif

    if ( GetPointerState() = 1 )
        fDiffX# = (GetPointerX() - startx#)/4.0
        fDiffY# = (GetPointerY() - starty#)/4.0

        newX# = angx# + fDiffY#
        if ( newX# > 89 ) then newX# = 89
        if ( newX# < -89 ) then newX# = -89
        SetCameraRotation( 1, newX#, angy# + fDiffX#, 0 )
    endif
    
    DrawBox( 510,382,514,385, 0, 0, 0, 0, 1 )
    DrawBox( 511,383,513,384, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 1 )	
        
    oldx# = GetCameraX(1)
    oldy# = GetCameraY(1)
    oldz# = GetCameraZ(1)
    
    MoveCameraLocalZ(1, 100)
    
    newx# = GetCameraX(1)
    newy# = GetCameraY(1)
    newz# = GetCameraZ(1)
    
    MoveCameraLocalZ(1, -100)
    
    hit = ObjectRayCast( 0, oldx#, oldy#, oldz#, newx#, newy#, newz# )
    
    Print(hit)
    Print(ScreenFPS())
    sync()
loop

However I did find a bug in CreateObjectFromObjectMesh where the created object would not draw properly, fixed for the next version, but this didn't affect collision.

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Preben

AGK Studio Developer

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Years of Service

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Joined: 30th Jun 2004

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Posted: 27th Jun 2016 11:07

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It has something to do with disabling collision and using SetObjectScalePermanent:

SetVirtualResolution(1024,768)
SetScissor(0,0,0,0)
SetClearColor( 0,0,0 )
 
CreateObjectBox( 1, 10, 10, 10 )
SetObjectCollisionMode(1,0)
SetObjectScalePermanent(1,1.0,1.0,1.0)

InstanceObject(2,1)
SetObjectPosition(2,15,0,0)
//SetObjectCollisionMode(1,1)
SetObjectCollisionMode(2,1)

do
     
    // control the camera
    if ( GetRawKeyState( 87 ) ) then MoveCameraLocalZ( 1, 0.2 )
    if ( GetRawKeyState( 83 ) ) then MoveCameraLocalZ( 1, -0.2 )
 
    if ( GetRawKeyState( 65 ) ) then MoveCameraLocalX( 1, -0.2 )
    if ( GetRawKeyState( 68 ) ) then MoveCameraLocalX( 1, 0.2 )
 
    if ( GetRawKeyState( 81 ) ) then MoveCameraLocalY( 1, -0.2 )
    if ( GetRawKeyState( 69 ) ) then MoveCameraLocalY( 1, 0.2 )
 
    if ( GetPointerPressed() )
        startx# = GetPointerX()
        starty# = GetPointerY()
        angx# = GetCameraAngleX(1)
        angy# = GetCameraAngleY(1)
        pressed = 1
    endif
 
    if ( GetPointerState() = 1 )
        fDiffX# = (GetPointerX() - startx#)/4.0
        fDiffY# = (GetPointerY() - starty#)/4.0
 
        newX# = angx# + fDiffY#
        if ( newX# > 89 ) then newX# = 89
        if ( newX# < -89 ) then newX# = -89
        SetCameraRotation( 1, newX#, angy# + fDiffX#, 0 )
    endif
     
    DrawBox( 510,382,514,385, 0, 0, 0, 0, 1 )
    DrawBox( 511,383,513,384, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 1 )   
         
    oldx# = GetCameraX(1)
    oldy# = GetCameraY(1)
    oldz# = GetCameraZ(1)
     
    MoveCameraLocalZ(1, 100)
     
    newx# = GetCameraX(1)
    newy# = GetCameraY(1)
    newz# = GetCameraZ(1)
     
    MoveCameraLocalZ(1, -100)
     
    hit = ObjectRayCast( 0, oldx#, oldy#, oldz#, newx#, newy#, newz# )
     
    Print(hit)
    Print(ScreenFPS())
    sync()
loop

+ Code Snippet

SetVirtualResolution(1024,768)
SetScissor(0,0,0,0)
SetClearColor( 0,0,0 )
 
CreateObjectBox( 1, 10, 10, 10 )
SetObjectCollisionMode(1,0)
SetObjectScalePermanent(1,1.0,1.0,1.0)

InstanceObject(2,1)
SetObjectPosition(2,15,0,0)
//SetObjectCollisionMode(1,1)
SetObjectCollisionMode(2,1)

do
     
    // control the camera
    if ( GetRawKeyState( 87 ) ) then MoveCameraLocalZ( 1, 0.2 )
    if ( GetRawKeyState( 83 ) ) then MoveCameraLocalZ( 1, -0.2 )
 
    if ( GetRawKeyState( 65 ) ) then MoveCameraLocalX( 1, -0.2 )
    if ( GetRawKeyState( 68 ) ) then MoveCameraLocalX( 1, 0.2 )
 
    if ( GetRawKeyState( 81 ) ) then MoveCameraLocalY( 1, -0.2 )
    if ( GetRawKeyState( 69 ) ) then MoveCameraLocalY( 1, 0.2 )
 
    if ( GetPointerPressed() )
        startx# = GetPointerX()
        starty# = GetPointerY()
        angx# = GetCameraAngleX(1)
        angy# = GetCameraAngleY(1)
        pressed = 1
    endif
 
    if ( GetPointerState() = 1 )
        fDiffX# = (GetPointerX() - startx#)/4.0
        fDiffY# = (GetPointerY() - starty#)/4.0
 
        newX# = angx# + fDiffY#
        if ( newX# > 89 ) then newX# = 89
        if ( newX# < -89 ) then newX# = -89
        SetCameraRotation( 1, newX#, angy# + fDiffX#, 0 )
    endif
     
    DrawBox( 510,382,514,385, 0, 0, 0, 0, 1 )
    DrawBox( 511,383,513,384, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 1 )   
         
    oldx# = GetCameraX(1)
    oldy# = GetCameraY(1)
    oldz# = GetCameraZ(1)
     
    MoveCameraLocalZ(1, 100)
     
    newx# = GetCameraX(1)
    newy# = GetCameraY(1)
    newz# = GetCameraZ(1)
     
    MoveCameraLocalZ(1, -100)
     
    hit = ObjectRayCast( 0, oldx#, oldy#, oldz#, newx#, newy#, newz# )
     
    Print(hit)
    Print(ScreenFPS())
    sync()
loop

If you remove SetObjectScalePermanent in the sample above , then collision is working on object 2 ?

best regards Preben Eriksen,

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Paul Johnston

TGC Developer

22

Years of Service

User Offline

Joined: 16th Nov 2002

Location: United Kingdom

Posted: 27th Jun 2016 13:32

Link

Fixed for the next version. SetObjectScalePermanent caused a regeneration of the collision data, but since the collision is set to 0 at this point it skips that step and leaves the object with no collision data. Only a call to SetObjectCollisionMode on the original object would regenerate the collision data so the instance object had no data to check. Now calling SetObjectCollisionMode on an instance will also regenerate the collision data on the parent if necessary.

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