how to use addTriangles

[shichao]

i want to load obj file which is made by maya.

and i use the addTriangles to load vertices there are a lot block on the surface.

the left one is smooth using index but cannot add texture because vertices_size and texcoords_size is not equal.

 

left 

object->allocateIndices(indices_size);
object->allocateVertex(vertices_size);

 for (int i = 0; i < vertices_size; i++){
        float x = mesh->attrib.vertices[3 * i + 0];
        float y = mesh->attrib.vertices[3 * i + 1];
       float z = mesh->attrib.vertices[3 * i + 2];

       object->addVertex(vec3(x, y, z));
 }
  for (int i = 0; i < shapes_size; i++){
       size_t index_offset = 0;
         for (size_t f = 0; f < mesh->shapes.mesh.num_face_vertices.size(); f++) {
              size_t fnum = mesh->shapes.mesh.num_face_vertices[f];
                for (size_t v = 0; v < fnum; v++) {
                   tinyobj::index_t idx = mesh->shapes.mesh.indices[index_offset + v];
                    object->addIndex(idx.vertex_index);
                    }
                    index_offset += fnum;
                }
            }

right

int total_indices = 0;
            for (int i = 0; i < mesh->shapes.size(); i++){
                total_indices += mesh->shapes.mesh.indices.size();
            }
            object->addTriangles(total_indices / 3);      
                    for (size_t v = 0; v < fv; v++) {
                        tinyobj::index_t idx = mesh->shapes.mesh.indices[index_offset + v];
                        tinyobj::real_t vx = mesh->attrib.vertices[3 * idx.vertex_index + 0];
                        tinyobj::real_t vy = mesh->attrib.vertices[3 * idx.vertex_index + 1];
                        tinyobj::real_t vz = mesh->attrib.vertices[3 * idx.vertex_index + 2];
                        object->addVertex(vec3(vx, vy, vz));

                        tinyobj::real_t tx = mesh->attrib.texcoords[2 * idx.texcoord_index + 0];
                        tinyobj::real_t ty = 1.0f - mesh->attrib.texcoords[2 * idx.texcoord_index + 1];
                        object->addTexCoord(vec4(tx, ty, 0.0f, 0.0f));
                    }
                    index_offset += fv;
                }
            }

Edited April 24, 2018 by shichao

[silent]

Hi!

There is a meshimport tool available with SDK (<SDK>/bin/meshimport_**.exe) that can convert obj files to unigine .mesh format. Can you check that you have the same results with it? You also can use ResourceEditor to smooth the surface normals.

Please, don't hesitate to contact our Chinese support team via china-support@unigine.com. I believe they can help you much faster :)

Thanks!

[shichao]

i add the index it works

but i dont know how to add normals in the ObjectMeshDynamicPtr object

i only found addTangent in ObjectMeshDynamicPtr

not sure how to transfrom normal to tangent?