Character not falling off box...

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Golelorn

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Posted: 23rd Apr 2017 21:27

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Hi,

In 2d physics I was able to get my character to hit walls, fall in holes, fall off the map, etc. But in 3D I am doing something wrong, and I don't know what.

I have created a box for the character to walk on. Its set to static, and the character is set to Dynamic. I have played with the gravity and mass, and I can get him to float up. But I can not get him to "fall" off the box. He just keeps walking along like he's Jesus, and rest assured he is not. Also, once I turned on Step3dPhysicsWorld he sunk into the box, and it looks like he is walking knee deep in dirt. So clearly something is going on.

Can someone help with solutions? He should be walking on top of the box.. not in it, and fall off the box when he walks off.

+ Code Snippet

Create3DPhysicsWorld()
SetGlobal3DDepth(5)

load3dmap()
function load3dmap()	
	floortexID = LoadImage( "/media/ground.png" )
	SetImageWrapU( floorTexID, 0 )
	SetImageWrapV( floorTexID, 0 )
	floorBoxID = CreateObjectBox(50,10,50)
	SetObjectImage( floorBoxID, floorTexID, 0 )
	SetObjectLightMode( floorBoxID, 1 )
	SetObjectPosition( floorBoxID, 0.0, -10.0, 0.0 )
	SetObjectRotation(floorBoxID,0,0,0)
	Create3DPhysicsStaticBody( floorBoxID )
	SetObjectShapeBox( floorBoxID)
endfunction


loadcharacters()
//loadmap()


do
	
    //PrintC()

    movehero(game.player.objId)
    Step3DPhysicsWorld()
    Sync()
loop

Here is the load characters code

+ Code Snippet

function loadcharacters()
game.player.imgID = LoadImage( "/media/gole.png" )
SetImageWrapU(game.player.imgID,1)
SetImageWrapV(game.player.imgID,1)
game.player.objID = LoadObjectWithChildren( "/media/biggole.dae")
SetObjectLightMode( game.player.objID, 0 )
SetObjectImage( game.player.objID, game.player.imgID, 0 )
SetObjectPosition( game.player.objID, 0, 0, 0 )
SetObjectRotation( game.player.objID, 0, -90, 0 )
SetObjectScalePermanent(game.player.objID,  2, 2, 2)
SetObjectAnimationSpeed(game.player.objID, .85)
PlayObjectAnimation(game.player.objID, "", 1.0/24.0, 20.0/24.0, 1, .25)
Create3DPhysicsDynamicBody(game.player.objID)
SetObject3DPhysicsMass(game.player.objID, 5)

Appreciate any help. I've attached two screenshots.

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Stab in the Dark software

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Posted: 24th Apr 2017 13:50

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You can not move a dynamic object, that is done by the physics engine.
You need to use the character controller instead. Here is some examples.

https://forum.thegamecreators.com/thread/216683

The coffee is lovely dark and deep,and I have code to write before I sleep.

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Golelorn

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Posted: 24th Apr 2017 22:03

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Gotcha. I didn't know that. In 2d I was able to move them with no problem, so I assumed the same thing.

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Golelorn

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Posted: 25th Apr 2017 00:39 Edited at: 25th Apr 2017 01:28

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OK, I got it to work after fudging with some numbers. My character didn't need to be offset(he's really tiny). Very cool. It seems to be working. Thanks, Stab!!! I just need to fix my camera, because its bouncing all around now lol.

The z-axis on the camera is the culprit.

What would make the camera so jittery on the z axis? It was fine when I was using spherecast to move him along the terrain. Any ideas?

Thanks.

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Stab in the Dark software

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Posted: 25th Apr 2017 01:56

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I saw your post before you edited it because I got it in an email.
It seems that you are mixing the 3D physics commands with the other basic collision commands.
For instance ObjectSphereSlide() does not work with the 3d Physics commands.
If you post your code I can see what you are doing wrong.

The coffee is lovely dark and deep,and I have code to write before I sleep.

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Golelorn

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Posted: 25th Apr 2017 23:00

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Yea, I didn't want to give up on the physics, so I tried again. Turned out, he was walking in the mesh, because I was using an offset that was unneeded.

No, I have the spherecast movement code remarked out.

Physics code that is causing the bouncey movement. If I lower the walk velocity it causes less of a bouncey movement

load3dmap()
function load3dmap()	
	floortexID = LoadImage( "/media/ground.png" )
	SetImageWrapU( floorTexID, 0 )
	SetImageWrapV( floorTexID, 0 )
	floorBoxID = CreateObjectBox(1000,12,1000)
	SetObjectImage( floorBoxID, floorTexID, 0 )
	SetObjectLightMode( floorBoxID, 1 )
	SetObjectPosition( floorBoxID, 0.0, 0.0, 0.0 )
	//SetObjectCollisionMode(floorBoxID,0)
	Create3DPhysicsStaticBody(floorBoxID)
	SetObjectShapeBox(floorBoxID)
endfunction

loadcharacters()
CreateCharacterController( game.player.objID )
Stand3DPhysicsCharacterController( game.player.objID )
Set3DPhysicsCharacterControllerStepHeight( game.player.objID,12.0 )
Set3DPhysicsCharacterControllerJumpSpeed( game.player.objID, 6.0 )

do
	if Get3DPhysicsCharacterControllerExists( game.player.objID ) 
		CharacterControllerInput( game.player.objID )
	endif
    //PrintC()
    //movehero(game.player.objID)
    SetCameraLookAt(1, GetObjectX(game.player.objID),GetObjectY(game.player.objID),GetObjectZ(game.player.objID),0)
    SetCameraPosition(1, GetObjectX(game.player.objID),GetObjectY(game.player.objID)+12,GetObjectZ(game.player.objID)-25)
    //z-axis is making it very bouncey
    Step3DPhysicsWorld()
    Sync() 
loop
function CreateCharacterController( objID as integer )
	characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
	objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
	Create3DPhysicsCharacterController( objID, 1, characterOffsetVec, objectOrientationVec, 0.75 )
	DeleteVector3( characterOffsetVec )
	DeleteVector3( objectOrientationVec )
	rotationInc = 1.0
	WalkVelocity = 10.0
	RunVelocity = 140.0
endfunction

function CharacterControllerInput( objID as integer )
	if GetKeyboardExists() 
		//Stops movement when no key is pressed.
		Move3DPhysicsCharacterController( objID, 0, WalkVelocity )
		
		//W Key Forwards
		if GetRawKeyState( 87 ) 
			Move3DPhysicsCharacterController( objID, 1, WalkVelocity )
		endif
	endif
endfunction

+ Code Snippet

load3dmap()
function load3dmap()	
	floortexID = LoadImage( "/media/ground.png" )
	SetImageWrapU( floorTexID, 0 )
	SetImageWrapV( floorTexID, 0 )
	floorBoxID = CreateObjectBox(1000,12,1000)
	SetObjectImage( floorBoxID, floorTexID, 0 )
	SetObjectLightMode( floorBoxID, 1 )
	SetObjectPosition( floorBoxID, 0.0, 0.0, 0.0 )
	//SetObjectCollisionMode(floorBoxID,0)
	Create3DPhysicsStaticBody(floorBoxID)
	SetObjectShapeBox(floorBoxID)
endfunction

loadcharacters()
CreateCharacterController( game.player.objID )
Stand3DPhysicsCharacterController( game.player.objID )
Set3DPhysicsCharacterControllerStepHeight( game.player.objID,12.0 )
Set3DPhysicsCharacterControllerJumpSpeed( game.player.objID, 6.0 )


do
	if Get3DPhysicsCharacterControllerExists( game.player.objID ) 
		CharacterControllerInput( game.player.objID )
	endif
    //PrintC()
    //movehero(game.player.objID)
    SetCameraLookAt(1, GetObjectX(game.player.objID),GetObjectY(game.player.objID),GetObjectZ(game.player.objID),0)
    SetCameraPosition(1, GetObjectX(game.player.objID),GetObjectY(game.player.objID)+12,GetObjectZ(game.player.objID)-25)
    //z-axis is making it very bouncey
    Step3DPhysicsWorld()
    Sync() 
loop
function CreateCharacterController( objID as integer )
	characterOffsetVec = CreateVector3( 0.0, 0.0, 0.0 )
	objectOrientationVec = CreateVector3( 0.0, 0.0, -1.0 )
	Create3DPhysicsCharacterController( objID, 1, characterOffsetVec, objectOrientationVec, 0.75 )
	DeleteVector3( characterOffsetVec )
	DeleteVector3( objectOrientationVec )
	rotationInc = 1.0
	WalkVelocity = 10.0
	RunVelocity = 140.0
endfunction

function CharacterControllerInput( objID as integer )
	if GetKeyboardExists() 
		//Stops movement when no key is pressed.
		Move3DPhysicsCharacterController( objID, 0, WalkVelocity )
		
		//W Key Forwards
		if GetRawKeyState( 87 ) 
			Move3DPhysicsCharacterController( objID, 1, WalkVelocity )
		endif
	endif
endfunction

Here is the spherecast if you wanted to see why I can't test a hit on my "hero". But it works when I test the "ground".

+ Code Snippet

function movehero(objID as integer)
	//W Key Forwards
		if GetRawKeyState( 87 ) 
			MoveObjectlocalZ(objID, -.185)
			move_z# = -.185
		endif
		if GetRawKeyState ( 65 )
			RotateObjectGlobalY(objID, -5)
		endif					
		if GetRawKeyState ( 68 )
			RotateObjectGlobalY(objID, 5)
		endif
		if GetRawKeyState( 83 ) 
			MoveObjectLocalZ(objID, .055)
			move_z# = .055
		endif
	
	gravity# = -1
	radius# = 2
	
	object_x# = GetObjectX(objID)
	object_y# = GetObjectY(objID)
	object_z# = GetObjectZ(objID)
	
	object_oldx# = GetObjectX(objID)
    object_oldy# = GetObjectY(objID)
	object_oldz# = GetObjectZ(objID)
	
	object_hit = ObjectSphereSlide(floorBoxID, object_oldx#, object_oldy#,object_oldz#,object_x#, object_y#,object_z#,radius#)
	
	if object_hit = 0 
			MoveObjectLocalY(objID, gravity#)
	endif

	PrintC(object_hit)
	
	
endfunction

Thank you, Stab.

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Golelorn

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Posted: 25th Apr 2017 23:15

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And, of course, I remark out the physics when I was working with the spherecast.

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Golelorn

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Posted: 25th Apr 2017 23:51 Edited at: 25th Apr 2017 23:53

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Nevermind, I remarked out the setcameralookat, and just added a manual offset in the camera position, and it fixed the issue.

This is awesome, Stab!!!!

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Golelorn

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Posted: 27th Apr 2017 01:18 Edited at: 27th Apr 2017 01:20

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Jerky movement. If I set the camera to stay the character doesn't bounce around. But if I set the camera to follow him its bouncing all over the damn place.

Pretty simple code.

SetCameraPosition(1, GetObjectX(game.player.objID),GetObjectY(game.player.objID)+12,GetObjectZ(game.player.objID)-25)

You may not be able to see the video as its on my facebook, but I included it as attachment.

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blink0k

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Posted: 27th Apr 2017 02:09

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use the y value from the ground plane

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Golelorn

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Posted: 27th Apr 2017 23:06

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blink0k, there is no change. Its the z-axis causing the bouncey , jerky movement. If I don't use the physics engine it doesn't bounce when he moves. So... I dunno... lol

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Golelorn

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Posted: 27th Apr 2017 23:16

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Hmmmmm, I have no idea what made me decide to do this. But in my slightly inebriated mind I thought I would try to put the camera position command after the physics command. I think I subconsciously understand, but certainly not smart enough to get it. IT WORKED!!!!

if Get3DPhysicsCharacterControllerExists( game.player.objID )
CharacterControllerInput( game.player.objID )
endif
//PrintC(GetObjectRayCastNormalX(0))
//movehero(game.player.objID)
Step3DPhysicsWorld()
cameramovement()
Sync()

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Stab in the Dark software

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Posted: 28th Apr 2017 00:47

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Congratulations, you have now learned a very important programming rule.
Sometimes the order of the code matters.
Sorry, I should have suggested it.

The coffee is lovely dark and deep,and I have code to write before I sleep.

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