[Bf-cycles] Crash on higher vertex count with subd

[Mohamed Sakr]

did you do mesh->tag_update and object->tag_update?

On Sat, Mar 3, 2018 at 10:26 AM, F Escobar <materialesescobar at hotmail.es>
wrote:

> @Mohamed Mesh::add_vertex has the same problem
>
> @Brecht I'll try to figure how to do that, if it helps the call stack
> points to
> cycles.exe!_malloc_base Line 34
> cycles.exe!_aligned_offset_malloc_base line 133
> ------------------------------
> *De:* Bf-cycles <bf-cycles-bounces at blender.org> en nombre de Brecht Van
> Lommel <brechtvanlommel at pandora.be>
> *Enviado:* viernes, 2 de marzo de 2018 19:08
> *Para:* Discussion list to assist Cycles render engine developers
> *Asunto:* Re: [Bf-cycles] Crash on higher vertex count with subd
>
> Do you have a backtrace of the crash? I can't immediately think of a
> reason this would happen.
>
> On Fri, Mar 2, 2018 at 2:33 PM, F Escobar <materialesescobar at hotmail.es>
> wrote:
>
> I've tried to create a super basic subd mesh with this code
>
> mesh->subdivision_type = ccl::Mesh::SUBDIVISION_LINEAR;
> int numVertex = 3000;
> mesh->verts.resize(numVertex);
> printf("resized %i\n", numVertex);
> for(int i=0;i<numVertex;i++)
> mesh->verts[i] = ccl::make_float3(0, 0, 0);
>
> int indices[3];
> indices[0] = 0;
> indices[1] = 1;
> indices[2] = 2;
> mesh->reserve_subd_faces(1, 0, 3);
> mesh->add_subd_face(indices, 3, 0, false);
>
> if (!mesh->subd_params) {
> mesh->subd_params = new ccl::SubdParams(mesh);
> }
> ccl::SubdParams& sdparams = *mesh->subd_params;
> sdparams.camera = scene->camera;
>
> ccl::Object *object = new ccl::Object();
> object->mesh = mesh;
> scene->objects.push_back(object);
>
> And yes... it only should generate one triangle, btw it shouldn't be
> rendered since all the vertex are in the same place (0,0,0) but that is not
> the question
>
> If I change numVertex  from 3000 to 300 it doesn't crash so it is related
> to the amount of vertex but anyway 3k is a pretty low amount.
>
> Any idea on this?
>
> Regards, F.
>
>
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