Complex object in 3d opengl Android

I am given a task of making some complex 3d object in opengl android.Earlier I have worked only on the primitive objects of opengl using nehe tutorials. I have googled and found that Blender is used to 开发者_运维百科make 3d object and then it is imported in android project .But I cant get HOW?

One easy way to do it is to export your objects in the OBJ format (it describes vertices of an object). You can then easily make your own OBJ reader (or use an existing one) and pass the vertices to OpenGL.

Else, don't reinvent the wheel and use a library that already does this for you (libgdx for instance).

... then it is imported in android project

Actually it's usually not imported but simply load from file by the target application. There are some export scripts for Blender that emit C code or even write out OpenGL calls; DON'T use them, they'll just mess up your program.

There are some good libraries for 3D object storage, like OpenCTM

What you need is an array of floats that represent your vertices/normals, like so:

float [ ]  vertices = {
VertexX, VertexY, VertexZ, NormalX, NormalY, NormalZ,
VertexX, VertexY, VertexZ, NormalX, NormalY, NormalZ,
VertexX, VertexY, VertexZ, NormalX, NormalY, NormalZ,
VertexX, VertexY, VertexZ, NormalX, NormalY, NormalZ,
..., ..., ..., ..., ..., ...,
};

Where each face has three unique vertex lines associated with it. Once you have this array built from an OBJ file or whatever format you want, using code that you'll have to figure out, you can render it by doing the following:

glVertexPointer(3, GL_FLOAT, sizeof(vertices[0])*6, &vertices[0]);
glNormalPoitner(GL_FLOAT, sizeof(vertices[0])*6, &vertices[3]);
glDrawArrays(GL_TRIANGLES, 0, numVertices);

See this Wikipedia page on the OBJ format for reference on how the obj file is laid out. Parsing the file is pretty straightforward once you understand the format.