View source for Extending Prop Sphere

The following simple snippet addition to <code>CPhysSphere</code>:

* Allows level designers to configure the collision model's radius
* Fully applies the [[prop_data]] and [[$surfaceprop]] of the chosen [[model]].

=== C++ ===

Open \server\props.cpp and replace this current existing <code>CPhysSphere</code> code :
<source lang=cpp>
// Debug sphere
class CPhysSphere : public CPhysicsProp
{
	DECLARE_CLASS( CPhysSphere, CPhysicsProp );
public:
	virtual bool OverridePropdata() { return true; }
	bool CreateVPhysics()
	{
		SetSolid( SOLID_BBOX );
		SetCollisionBounds( -Vector(12,12,12), Vector(12,12,12) );
		objectparams_t params = g_PhysDefaultObjectParams;
		params.pGameData = static_cast<void *>(this);
		IPhysicsObject *pPhysicsObject = physenv->CreateSphereObject( 12, 0, GetAbsOrigin(), GetAbsAngles(), &params, false );
		if ( pPhysicsObject )
		{
			VPhysicsSetObject( pPhysicsObject );
			SetMoveType( MOVETYPE_VPHYSICS );
			pPhysicsObject->Wake();
		}
	
		return true;
	}
};
</source>

With this improved version of the <code>CPhysSphere</code> code :

<source lang=cpp>
class CPhysSphere : public CPhysicsProp
{
	DECLARE_CLASS( CPhysSphere, CPhysicsProp );
	DECLARE_DATADESC();
public:

	float m_fRadius;

	bool CreateVPhysics()
	{
		SetSolid( SOLID_BBOX );
		SetCollisionBounds( -Vector(m_fRadius), Vector(m_fRadius) );
		objectparams_t params = g_PhysDefaultObjectParams;
		params.pGameData = static_cast<void *>(this);
		IPhysicsObject *pPhysicsObject = physenv->CreateSphereObject( m_fRadius, GetModelPtr()->GetRenderHdr()->textureindex, GetAbsOrigin(), GetAbsAngles(), &params, false );

		if ( pPhysicsObject )
		{
			VPhysicsSetObject( pPhysicsObject );
			SetMoveType( MOVETYPE_VPHYSICS );
			pPhysicsObject->Wake();
		}
	
		return true;
	}
};

LINK_ENTITY_TO_CLASS( prop_sphere, CPhysSphere );

BEGIN_DATADESC( CPhysSphere )
	DEFINE_KEYFIELD( m_fRadius, FIELD_FLOAT, "radius"),
END_DATADESC()
</source>

After replacing the <code>CPhysSphere</code> code, remove this line :

<source lang=cpp>
LINK_ENTITY_TO_CLASS(prop_sphere, CPhysSphere);
</source>

That is located '''AFTER''' This block of code :

<source lang=cpp>
void CPropDoorRotating::InputSetSpeed(inputdata_t &inputdata)
{
	AssertMsg1(inputdata.value.Float() > 0.0f, "InputSetSpeed on %s called with negative parameter!", GetDebugName() );
	m_flSpeed = inputdata.value.Float();
	DoorResume();
}
</source>

As it then begins to create compile errors thanks to replacing the <code>class CPhysSphere : public CPhysicsProp</code> code.



=== Extended FGD ===

<source lang=ini>
@PointClass base(BasePropPhysics, RenderFields) studioprop() sphere(radius) = prop_sphere : "Creates a perfect sphere."
[
	radius(float) : "Radius" : 12 : ""
]
</source>


== Credits ==

Original Writer : [[User:Artfunkel|Artfunkel]]
[[Category:Programming]]
[[Category:Tutorials]]
[[Category:Snippets]]