Hi Guys!

I am using directxTK's frustum and Bundingbox APIs.

I am Initializing Frustum with

m_FrustumDefault = BoundingFrustum(Projection);

where

Projection = XMMatrixPerspectiveFovLH(XM_PIDIV4, m_aspectRatio, 0.1f, 10000.0f)

I am using Assimp to load FBX model with meshes in hierarchy, I am also transforming viertices manually instead of aiProcess_PreTransformVertices. Like …

//transforming boudingboxes
	aiVector3D vmin = matrix * mesh->mAABB.mMin;
	aiVector3D vmax = matrix * mesh->mAABB.mMax;
	
	//transforming vertices
for (UINT i = 0; i < mesh->mNumVertices; i++)
	{
		VERTEX vertex;
		mesh->mVertices[i] = matrix * mesh->mVertices[i];
		vertex.Position.x = mesh->mVertices[i].x;
		vertex.Position.y = mesh->mVertices[i].y;
		vertex.Position.z = mesh->mVertices[i].z;
		vertex.Position.w = 1.0f;
		...

and

void DX12Model::processNode(aiNode* node, const aiScene* scene)
{
	for (UINT i = 0; i < node->mNumMeshes; i++)
	{
		aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
		m_Meshes.push_back(this->processMesh(mesh, scene, node->mTransformation));
	}

	for (UINT i = 0; i < node->mNumChildren; i++)
	{
		node->mChildren[i]->mTransformation = node->mChildren[i]->mParent->mTransformation * node->mChildren[i]->mTransformation;
		this->processNode(node->mChildren[i], scene);
	}
}

I am also updating frustum with ViewMatrix …

	m_FrustumDefault.Transform(m_Frustum, GetViewMatrix());

where m_FrustumDefault is default frustum with projection matrix only.

and i return

m_Frustum

…

How should i frustum Cull these Bounding Boxes …

i Am not able to get good result from Contain and Intersect mathod of directxTK, should i transform Bounding box with WorldViewProjection matrix.

thanks…