blocks physics example to sphere physics example runs like blocks

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Jo Bach

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Joined: 22nd Dec 2014

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Posted: 16th Dec 2015 21:12

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There is a 3d example in the files that lets a small box fall on a big box with physics.

That works fine.

Now I changed it to spheres.

The problem is that the ball falls and then stops above the big ball en won't tumble like the example bloks.

Even if I change the x and z position of the small ball.

Look at the code:

+ Code Snippet


// Project: 3d_testZone spheres
// Created: 2015-12-13

// set window properties
SetWindowTitle( "3d_testZone spheres" )
SetWindowSize( 1024, 768, 0 )

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

Create3DPhysicsWorld()
CreateObjectSphere(1,10,12,12)
CreateObjectSphere(2,5,12,12)
SetObjectPosition(2,0,10,0)

CreateObjectPlane(5,60,60)
RotateObjectGlobalX(5,90)
SetObjectPosition(5,0,-10,0)
Create3DPhysicsStaticBody(1)
SetObjectShapeSphere(1)
SetObjectShapeSphere(2)

SetObjectColor(1,255,0,0,255)
SetObjectColor(5,0,255,0,255)

SetObjectPosition(1,7,0,5)
Create3DPhysicsDynamicBody(2)

SetCameraPosition(1,0,20,-60)
SetCameraLookAt(0,0,10,0,0)

do

    Print( ScreenFPS() )
	Step3DPhysicsWorld()
    Sync()

loop

I changed some codes, but can't figure out what I am doing wrong. Can somebody please give a tip.

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Stab in the Dark software

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Joined: 12th Dec 2002

Playing: Badges, I don't need no stinkin badges

Posted: 16th Dec 2015 21:29

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Try this, post if you have any questions.

// Project: 3d_testZone spheres
// Created: 2015-12-13
 
// set window properties
SetWindowTitle( "3d_testZone spheres" )
SetWindowSize( 1024, 768, 0 )
 
// set display properties
SetVirtualResolution( 1024, 768 )
SetOrientationAllowed( 1, 1, 1, 1 )

Create3DPhysicsWorld()

CreateObjectSphere(1,10,12,12)
SetObjectPosition(1,7,0,5)
//When you create a static body you do not set the shape it automatically
//creates a polygon shape based on the object, in this case a sphere.
Create3DPhysicsStaticBody(1)

CreateObjectSphere(2,5,12,12)
SetObjectPosition(2, 7, 10, 4)
//A dynamic body is automatically a box shape.
Create3DPhysicsDynamicBody(2)
//So we change to a sphere collision shape
SetObjectShapeSphere(2)
//The physics automatically puts the objects to sleep so we turn it off here
//so sphere keeps rolling
SetObject3DPhysicsCanSleep( 2, 0 )

//Here you are creating a floor so we make it static
CreateObjectPlane(5,60,60)
RotateObjectGlobalX(5,90)
SetObjectPosition(5,0,-10,0)
Create3DPhysicsStaticBody(5)

SetObjectColor(1,255,0,0,255)
SetObjectColor(5,0,255,0,255)

SetCameraPosition(1,0,20,-60)
SetCameraLookAt(0,0,10,0,0)
 
do
 
    Print( ScreenFPS() )
    Step3DPhysicsWorld()
    Sync()
 
loop

+ Code Snippet

// Project: 3d_testZone spheres
// Created: 2015-12-13
 
// set window properties
SetWindowTitle( "3d_testZone spheres" )
SetWindowSize( 1024, 768, 0 )
 
// set display properties
SetVirtualResolution( 1024, 768 )
SetOrientationAllowed( 1, 1, 1, 1 )

Create3DPhysicsWorld()


CreateObjectSphere(1,10,12,12)
SetObjectPosition(1,7,0,5)
//When you create a static body you do not set the shape it automatically
//creates a polygon shape based on the object, in this case a sphere.
Create3DPhysicsStaticBody(1)


CreateObjectSphere(2,5,12,12)
SetObjectPosition(2, 7, 10, 4)
//A dynamic body is automatically a box shape.
Create3DPhysicsDynamicBody(2)
//So we change to a sphere collision shape
SetObjectShapeSphere(2)
//The physics automatically puts the objects to sleep so we turn it off here
//so sphere keeps rolling
SetObject3DPhysicsCanSleep( 2, 0 )

 
 //Here you are creating a floor so we make it static
CreateObjectPlane(5,60,60)
RotateObjectGlobalX(5,90)
SetObjectPosition(5,0,-10,0)
Create3DPhysicsStaticBody(5)


SetObjectColor(1,255,0,0,255)
SetObjectColor(5,0,255,0,255)
 

SetCameraPosition(1,0,20,-60)
SetCameraLookAt(0,0,10,0,0)
 
do
 
    Print( ScreenFPS() )
    Step3DPhysicsWorld()
    Sync()
 
loop

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

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Stab in the Dark software

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Joined: 12th Dec 2002

Playing: Badges, I don't need no stinkin badges

Posted: 23rd Dec 2015 15:10

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Did the example help you understand how the 3D physics works?

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

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Jo Bach

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Joined: 22nd Dec 2014

Location:

Posted: 29th Dec 2015 11:58

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Hi Stab,

Thanks for the example and explanation.

It helped me alot.

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