vertex buffer crash in GL3+ with ATI graphics card

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Kinfoin
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Posts: 19
Joined: Sun Jul 05, 2015 3:16 am

vertex buffer crash in GL3+ with ATI graphics card

Post by Kinfoin » Sun Apr 03, 2016 10:32 am

hellow everyone,i have a problem with Ogre version 1.10 with GL3+ render system.
i want to change the vertex of a mesh.
and i wrote code:

Code: Select all

Ogre::Entity* tE = mSceneMgr->getEntity("Head");
			Ogre::MeshPtr headM = tE->getMesh();
			for (int i = 0; i < headM->getNumSubMeshes(); i++)
			{
				Ogre::SubMesh* submesh = headM->getSubMesh(i);
				Ogre::VertexData* vertex_data = submesh->useSharedVertices ? headM->sharedVertexData :
					submesh->vertexData;

				bool added_shared = false;
				size_t current_offset = 0;
				size_t shared_offset = 0;
				size_t next_offset = 0;

				if ((!submesh->useSharedVertices) || (submesh->useSharedVertices && !added_shared))
				{
					if (submesh->useSharedVertices)
					{
						added_shared = true;
						shared_offset = current_offset;
					}
					// the real vertex data is wrapped into lots of classes
					const Ogre::VertexElement* Elem = vertex_data->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
					Ogre::HardwareVertexBufferSharedPtr vbuf = vertex_data->vertexBufferBinding->getBuffer(Elem->getSource());

					unsigned char* vertex = static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_NORMAL));

					float* pReal;
					for (size_t j = 0; j < vertex_data->vertexCount; ++j, vertex += vbuf->getVertexSize())
					{
						// get vertex data
						Elem->baseVertexPointerToElement(vertex, &pReal);
						// translate to world space and scale, rota

						pReal[0] = pReal[0] - 10;
						pReal[1] = pReal[1] + 10;
						pReal[2] = pReal[2] - 5;
					}
					vbuf->unlock();
					next_offset += vertex_data->vertexCount;
				}
			}
just a little move...
it works well with NVIDIA graphics card.but crash in ATI graphics card.
and i found if i use mouse ray to pick up entity,it well crash too.
if somebody knows what happan,please tell me, thanks a lot!
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