[SOLVED] Changing and replacing indices during runtime in ObjectDynamic

[sebastian.vesenmayer]

Hello together,

I try to change the indices of an ObjectDynamic during runtime to discard some points in Unigine 2.11.

I can call clearIndices() on this object and all geometry vanish.

But when I change the index array and set it again. the changed data won't get uploaded and the geometry still looks the same.

Any ideas?

int AppWorldLogic::init()
{
	// Write here code to be called on world initialization: initialize resources for your world scene during the world start.
	m_dynamicObject = Unigine::ObjectDynamic::create();
	
	m_dynamicObject->setMaterialNodeType(Unigine::Node::TYPE::OBJECT_MESH_STATIC);
	m_dynamicObject->setWorldTransform(Unigine::Math::translate(Unigine::Math::Vec3(0.0, -4.0, 1.0)));
	m_dynamicObject->setMaterial("custom_forward_material","*");
	
	const Unigine::ObjectDynamic::Attribute attributes[]={{ 0, Unigine::ObjectDynamic::TYPE_FLOAT, 3 }};
	m_dynamicObject->setVertexFormat(attributes, 1);
	m_dynamicObject->setSurfaceMode(Unigine::ObjectDynamic::MODE::MODE_POINTS, 0);
	m_dynamicObject->setBoundBox(Unigine::BoundBox(Unigine::Math::vec3(-10000.f, -10000.f, -10000.f), Unigine::Math::vec3(10000.f, 10000.f, 10000.f)));

	Unigine::Math::vec3 position;
	for (int i = 0; i < 1000; ++i)
	{
		for (int j = 0; j < 100; ++j)
		{
			position = Unigine::Math::vec3(i, j, 1.f);
			m_dynamicObject->addVertexFloat(0, position, 3);
		}
	}

	m_indices = new int[100000];
	for (int index = 0; index < 100000; ++index)
	{
		m_indices[index] = index;
	}
	m_dynamicObject->setIndicesArray(m_indices, 100000);
	

	return 1;
}

////////////////////////////////////////////////////////////////////////////////
// start of the main loop
////////////////////////////////////////////////////////////////////////////////

int AppWorldLogic::update()
{
	static int counter=1;
	if (counter % 120 == 0)
	{
		m_dynamicObject->clearIndices();
	}
	else if(counter % 120 == 60)
	{
		for (int i = 0; i < 100000; ++i)
		{
			m_indices[i] = (rand() % 2 == 1) ? i : 0;
		}
		m_dynamicObject->setIndicesArray(m_indices, 100000);
	}
	counter++;
	return 1;
}

 

[morbid]

Hello Sebastian,

Please try calling flushIndicies after setIndicesArray. Let me know if this won't help.

Thanks.

[sebastian.vesenmayer]

Thanks morbid, it works :)

Can you add a hint to the documentation of the method setIndicesArray?

 

 

[morbid]

Sure, already forwarded this case to colleagues :)

Thank you for pointing this out.