the new physics character controller AGK 2.0.15b

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shadey

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Posted: 1st Nov 2015 23:01

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Can someone give me a small example of how to use Create3DPhysicsCharacterController correctly, seems it crashes when I try with...

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Create3DPhysicsCharacterController( player, 0, 0,0, 50 )

Though I have no idea what values to put apart from the first param!

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Posted: 1st Nov 2015 23:43 Edited at: 1st Nov 2015 23:44

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You can get the parameter descriptions for the command by double clicking the command name and press the F1 key which will open the help file in a browser.
Here is the link just in case.

https://www.appgamekit.com/documentation/Reference/3DPhysics/Create3DPhysicsCharacterController.htm

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Posted: 1st Nov 2015 23:50 Edited at: 1st Nov 2015 23:52

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Yeh I had done this,but have no idea what axis, objOffsetVec3, objOrientationVec3, mean as the 2nd,3rd and fourth parameter.
I appreciate it explains them but sill am clueless as they still lack any example

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Posted: 2nd Nov 2015 00:27 Edited at: 2nd Nov 2015 00:29

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See the code example below for clarification.

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	//This vector is the offset of the model center from origin.
	//For example a model 72 units tall standing at origin is 36 units offset on the y axis.
	//This allows for models of different sizes.
	characterOffsetVec = CreateVector3( 0.0, 36.0, 0.0 )
	//This vector indicates the axis your model faces forward.
	//For example if your model faces down the - Z axis use this vector.
	objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
	//The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
	Create3DPhysicsCharacterController( objID, 1, characterOffsetVec, objectOrientationVec, 0.75 )
	DeleteVector3( characterOffsetVec )
	DeleteVector3( objectOrientationVec )

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shadey

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Posted: 2nd Nov 2015 01:03 Edited at: 2nd Nov 2015 01:23

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tried the code but seems to still crash! simply changine odjID with player (the name of my object)
*** edit ***
It crashes as soon as it hits the Create3DPhysicsCharacterController, the creating and deleting of vectors is fine, I even tried simply:

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obj=createobjectbox(4,4,4)
characterOffsetVec = CreateVector3( 0.0, 2.0, 0.0 )
//This vector indicates the axis your model faces forward.
//For example if your model faces down the - Z axis use this vector.
objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
//The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
DeleteVector3( characterOffsetVec )
DeleteVector3( objectOrientationVec )

But still it crashes

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Posted: 2nd Nov 2015 02:49

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Can you please provide the entire code for your project.
It will make it easier to diagnose the issue.

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shadey

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Posted: 2nd Nov 2015 07:39 Edited at: 2nd Nov 2015 08:21

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no it wouldnt, I am trying it within my 3d editor! at the built in test level part, but everything else physics wise is working fine
**edit**
A small part of it I ripped out and changed:

// Project: testtube 
// Created: 2015-11-02

// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant	KEY_Q			=	81
platformer()
end

function platformer()
	AddVirtualJoystick(1,10,90,10)	
	obj=createobjectbox(2,2,2)
	SetObjectPosition(obj,0,0,0)
	characterOffsetVec = CreateVector3( 0.0, 1, 0.0 )
	//This vector indicates the axis your model faces forward.
	//For example if your model faces down the - Z axis use this vector.
	objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
	//The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
	Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
	DeleteVector3( characterOffsetVec )
	DeleteVector3( objectOrientationVec )
	repeat
		if getrawkeypressed(KEY_Q)
		quittest=1
		endif
		Step3DPhysicsWorld()
		sync()
	until quittest=1
	quittest=0
endfunction

+ Code Snippet



// Project: testtube 
// Created: 2015-11-02

// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant	KEY_Q			=	81
platformer()
end

function platformer()
	AddVirtualJoystick(1,10,90,10)	
	obj=createobjectbox(2,2,2)
	SetObjectPosition(obj,0,0,0)
	characterOffsetVec = CreateVector3( 0.0, 1, 0.0 )
	//This vector indicates the axis your model faces forward.
	//For example if your model faces down the - Z axis use this vector.
	objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
	//The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
	Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
	DeleteVector3( characterOffsetVec )
	DeleteVector3( objectOrientationVec )
	repeat
		if getrawkeypressed(KEY_Q)
		quittest=1
		endif
		Step3DPhysicsWorld()
		sync()
	until quittest=1
	quittest=0
endfunction

This crashes on mine still

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Posted: 2nd Nov 2015 11:59

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You can not use repeat, untill for the main loop in AGK. You must have a Do, Loop.
You also need to have a static physics object for the character controller to land on.
The starting position of your character object must be above the object it will land on.

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CJB

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Posted: 2nd Nov 2015 12:48

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Since when have you had to use a Do Loop? ...just tested this, and Repeat Until appears to work fine:

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// Project: repeattest 
// Created: 2015-11-02

// set window properties
SetWindowTitle( "repeattest" )
SetWindowSize( 1024, 768, 0 )

// set display properties
SetVirtualResolution( 1024, 768 )
SetOrientationAllowed( 1, 1, 1, 1 )

q=0


repeat
    
	if GetRawKeyState(27)
		q=1
	endif
	

    Print( ScreenFPS() )
    Sync()
    
until q=1

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Posted: 2nd Nov 2015 13:28

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Why are there DO LOOP commands?

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Mobiius

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Posted: 2nd Nov 2015 13:47

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People use repeat - until as they think it's faster.

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Posted: 2nd Nov 2015 14:50

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Quote: "as they think it's faster"

I just use the right type of loop for the job. A "Repeat Until" will iterate at least once before checking for the condition. A "While Endwhile" will do the check first meaning you can skip the contents of the loop entirely if the condition is not met. A "Do Loop" should be used when you know a perpetual loop is required. I wasn't aware of any performance differences between different types of loop, but would be interesting to find out!

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Posted: 2nd Nov 2015 14:59

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Search these forums, tests have been done and documented.

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Posted: 2nd Nov 2015 17:15

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DO / LOOP is not a requirement for the main game loop. You don't actually need any loop...but the code would be dire.
You shouldn't need something for the character controller to land on during the Create process. I'd be very surprised if it needed anything to land on at all, even during the simulation. Even if it did, it shouldn't crash.
Likewise, it doesn't need to be above anything.

I tested, and it crashed here too. It crashes on the create command
I tried an extra Sync and Physics step prior to it, in case it needed some setup to take place, but this didn't help.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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shadey

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Posted: 2nd Nov 2015 19:18 Edited at: 2nd Nov 2015 19:23

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I do not usually use a do loop, it was just a quick example with the defaults! Also as I said I had to rip the bit out of my editor,which had plenty of static objects for it to 'land on' fact is it never gets chance anyhow coz it crashes on that creation of the controller command instantly.

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Posted: 2nd Nov 2015 23:24

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Upon further testing it was determined that it is a random crash inside the Create3DPhysicsCharacterController() command.
When the width and depth of your object are the same it causes a variable to not be initialized and results in the crash.
I am submitting the fix to Paul. In the code snippet below I changed the X and Z dimensions of the box so they are not the same.
This is the current work around.

// Project: testtube 
// Created: 2015-11-02
 
// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant   KEY_Q           =   81
platformer()
end
 
function platformer()
    AddVirtualJoystick(1,10,90,10)  
    obj=createobjectbox(32 ,72, 16)
    SetObjectPosition(obj,0,0,0)
    characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
    //This vector indicates the axis your model faces forward.
    //For example if your model faces down the - Z axis use this vector.
    objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
    //The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
    Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
    DeleteVector3( characterOffsetVec )
    DeleteVector3( objectOrientationVec )
    repeat
        if getrawkeypressed(KEY_Q)
        quittest=1
        endif
        Step3DPhysicsWorld()
        sync()
    until quittest=1
    quittest=0
endfunction

+ Code Snippet

 
// Project: testtube 
// Created: 2015-11-02
 
// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant   KEY_Q           =   81
platformer()
end
 
function platformer()
    AddVirtualJoystick(1,10,90,10)  
    obj=createobjectbox(32 ,72, 16)
    SetObjectPosition(obj,0,0,0)
    characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
    //This vector indicates the axis your model faces forward.
    //For example if your model faces down the - Z axis use this vector.
    objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
    //The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
    Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
    DeleteVector3( characterOffsetVec )
    DeleteVector3( objectOrientationVec )
    repeat
        if getrawkeypressed(KEY_Q)
        quittest=1
        endif
        Step3DPhysicsWorld()
        sync()
    until quittest=1
    quittest=0
endfunction

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shadey

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Posted: 3rd Nov 2015 10:46

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I tried this code within my engine, but it makes the object I use as the player totally vanish, despite it being above static physics enabled objects, it no longer crashes though...

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Posted: 3rd Nov 2015 14:18

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I have been unable to reproduce the crash you are having.
Could you create a code snippet that reproduces the crash?

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shadey

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Posted: 3rd Nov 2015 14:25 Edited at: 3rd Nov 2015 14:35

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there is no crash, the object simply disappears as soon as the level is ran, the code is lengthy as I have done a 3d editor that has the ability to test the level within the editor, as soon as the character controller is added the object vanishes, it reappears when I exit back to the editor, remming out the chracter controller then has the object visible in both the editor and on testing the level.

I will try to code an example outside of the editor.

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Posted: 3rd Nov 2015 14:37

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Can you try using the command Debug3DPhysicsCharacterController() which will show the physics object for the controller.
If the character controller is created successfully you should see the physics capsule.

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Posted: 3rd Nov 2015 14:55 Edited at: 3rd Nov 2015 14:59

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okay,it must be something on my part, I have at least something that does not disappear, though the thing keeps bouncing!

// Project: testtube 
// Created: 2015-11-02
  
// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant   KEY_Q           =   81
global obj=0
global myfloor=0
init()
platformer()
end
function init()
    obj=createobjectbox(5 ,10, 16)
    setobjectcolor(obj,255,0,0,255)
    SetObjectPosition(obj,0,40,0)
    ` createobjectphysics(obj,2,2)
    myfloor=createobjectbox(20,20,20)
    setobjectposition(myfloor,0,0,0)
    createobjectphysics(myfloor,2,1)
    characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
    //This vector indicates the axis your model faces forward.
    //For example if your model faces down the - Z axis use this vector.
    objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
    //The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
    Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
    DeleteVector3( characterOffsetVec )
    DeleteVector3( objectOrientationVec )
endfunction
  
function platformer()
   
    repeat
        if getrawkeypressed(KEY_Q)
        quittest=1
        endif
        setcameralookat(1,getobjectx(obj),getobjecty(obj),getobjectz(obj),0)
        Step3DPhysicsWorld()
        sync()
    until quittest=1
    quittest=0
endfunction
function createobjectphysics(myobj,myphyshape,myphybody)
		select myphybody
			case 1
				Create3DPhysicsStaticBody( myobj )
			endcase	
			case 2
				Create3DPhysicsDynamicBody( myobj )
			endcase
		endselect
		select myphyshape
			case 1
				SetObjectShapesphere(myobj)
			endcase
			case 2
				SetObjectShapebox(myobj)
			endcase		
		endselect
endfunction

+ Code Snippet

// Project: testtube 
// Created: 2015-11-02
  
// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant   KEY_Q           =   81
global obj=0
global myfloor=0
init()
platformer()
end
function init()
    obj=createobjectbox(5 ,10, 16)
    setobjectcolor(obj,255,0,0,255)
    SetObjectPosition(obj,0,40,0)
    ` createobjectphysics(obj,2,2)
    myfloor=createobjectbox(20,20,20)
    setobjectposition(myfloor,0,0,0)
    createobjectphysics(myfloor,2,1)
    characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
    //This vector indicates the axis your model faces forward.
    //For example if your model faces down the - Z axis use this vector.
    objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
    //The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
    Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
    DeleteVector3( characterOffsetVec )
    DeleteVector3( objectOrientationVec )
endfunction
  
function platformer()
   
    repeat
        if getrawkeypressed(KEY_Q)
        quittest=1
        endif
        setcameralookat(1,getobjectx(obj),getobjecty(obj),getobjectz(obj),0)
        Step3DPhysicsWorld()
        sync()
    until quittest=1
    quittest=0
endfunction
function createobjectphysics(myobj,myphyshape,myphybody)
		select myphybody
			case 1
				Create3DPhysicsStaticBody( myobj )
			endcase	
			case 2
				Create3DPhysicsDynamicBody( myobj )
			endcase
		endselect
		select myphyshape
			case 1
				SetObjectShapesphere(myobj)
			endcase
			case 2
				SetObjectShapebox(myobj)
			endcase		
		endselect
endfunction

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Posted: 3rd Nov 2015 16:01

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To stop the bouncing there are 2 options.
1. make your object box taller than it is wide or deep.
2. change the axis to a z axis which is your largest dimension. For example Create3DPhysicsCharacterController(obj, 2, characterOffsetVec, objectOrientationVec, 0.75 )

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Posted: 3rd Nov 2015 16:15

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right, tnx for that, I chose the latter option, but there seems to be a gap between the object controller and the object for the floor:

// Project: testtube 
// Created: 2015-11-02
  
// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant   KEY_Q           =   81
global obj=0
global myfloor=0
global CameraDistance#=40
init()
platformer()
end
function init()
    obj=createobjectbox(5 ,10, 16)
    setobjectcolor(obj,255,0,0,255)
    SetObjectPosition(obj,0,40,0)
   ` createobjectphysics(obj,2,2)
    myfloor=createobjectbox(20,20,20)
    setobjectposition(myfloor,0,0,0)
    createobjectphysics(myfloor,2,1)
    characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
    //This vector indicates the axis your model faces forward.
    //For example if your model faces down the - Z axis use this vector.
    objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
    //The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
    `Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
    Create3DPhysicsCharacterController(obj, 2, characterOffsetVec, objectOrientationVec, 0.75 )
    DeleteVector3( characterOffsetVec )
    DeleteVector3( objectOrientationVec )
endfunction
  
function platformer()
   
    repeat
		xpos#=getobjectx(obj)
		ypos#=getobjecty(obj)
		zpos#=getobjectz(obj)
        if getrawkeypressed(KEY_Q)
        quittest=1
        endif
        setcameraposition(1,xpos#,ypos#,zpos#+CameraDistance#)
        setcameralookat(1,xpos#,ypos#,zpos#,0)
        Step3DPhysicsWorld()
        sync()
    until quittest=1
    quittest=0
endfunction
function createobjectphysics(myobj,myphyshape,myphybody)
		select myphybody
			case 1
				Create3DPhysicsStaticBody( myobj )
			endcase	
			case 2
				Create3DPhysicsDynamicBody( myobj )
			endcase
		endselect
		select myphyshape
			case 1
				SetObjectShapesphere(myobj)
			endcase
			case 2
				SetObjectShapebox(myobj)
			endcase		
		endselect
endfunction

+ Code Snippet

// Project: testtube 
// Created: 2015-11-02
  
// set window properties
SetWindowTitle( "testtube" )
`SetWindowSize(320,240,1)
SetWindowSize(640,480,1)
// set display properties
`SetDisplayAspect( 320.0 / 240.0 )
SetDisplayAspect( 640.0 / 480.0 )
SetOrientationAllowed( 1, 1, 1, 1 )
`SetSyncRate(60,0)
SetScissor(0,0,0,0)
Create3DPhysicsWorld(40)
Set3DPhysicsGravity(0,-5,0)
#constant   KEY_Q           =   81
global obj=0
global myfloor=0
global CameraDistance#=40
init()
platformer()
end
function init()
    obj=createobjectbox(5 ,10, 16)
    setobjectcolor(obj,255,0,0,255)
    SetObjectPosition(obj,0,40,0)
   ` createobjectphysics(obj,2,2)
    myfloor=createobjectbox(20,20,20)
    setobjectposition(myfloor,0,0,0)
    createobjectphysics(myfloor,2,1)
    characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
    //This vector indicates the axis your model faces forward.
    //For example if your model faces down the - Z axis use this vector.
    objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
    //The crouchScale parameter is 0.0 to 1.0, for examle 0.75 is 75% of the models standing height.
    `Create3DPhysicsCharacterController(obj, 1, characterOffsetVec, objectOrientationVec, 0.75 )
    Create3DPhysicsCharacterController(obj, 2, characterOffsetVec, objectOrientationVec, 0.75 )
    DeleteVector3( characterOffsetVec )
    DeleteVector3( objectOrientationVec )
endfunction
  
function platformer()
   
    repeat
		xpos#=getobjectx(obj)
		ypos#=getobjecty(obj)
		zpos#=getobjectz(obj)
        if getrawkeypressed(KEY_Q)
        quittest=1
        endif
        setcameraposition(1,xpos#,ypos#,zpos#+CameraDistance#)
        setcameralookat(1,xpos#,ypos#,zpos#,0)
        Step3DPhysicsWorld()
        sync()
    until quittest=1
    quittest=0
endfunction
function createobjectphysics(myobj,myphyshape,myphybody)
		select myphybody
			case 1
				Create3DPhysicsStaticBody( myobj )
			endcase	
			case 2
				Create3DPhysicsDynamicBody( myobj )
			endcase
		endselect
		select myphyshape
			case 1
				SetObjectShapesphere(myobj)
			endcase
			case 2
				SetObjectShapebox(myobj)
			endcase		
		endselect
endfunction

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AppGameKit Classic Chat / the new physics character controller AGK 2.0.15b