1.1 --- a/prototype/src/mesh.cc	Tue Aug 21 04:57:33 2012 +0300
     1.2 +++ b/prototype/src/mesh.cc	Tue Aug 21 06:33:36 2012 +0300
     1.3 @@ -201,3 +201,39 @@
     1.4  
     1.5  	glPopMatrix();
     1.6  }
     1.7 +
     1.8 +
     1.9 +void Mesh::calc_bsph()
    1.10 +{
    1.11 +	glBindBuffer(GL_ARRAY_BUFFER, vbo[MESH_ATTR_VERTEX]);
    1.12 +	Vector3 *varr = (Vector3*)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
    1.13 +
    1.14 +	bsph_center = Vector3(0, 0, 0);
    1.15 +
    1.16 +	for(unsigned int i=0; i<nverts; i++) {
    1.17 +		bsph_center += varr[i];
    1.18 +	}
    1.19 +	bsph_center /= (float)nverts;
    1.20 +
    1.21 +	// assume all vertices are equidistant from the center
    1.22 +	bsph_rad = (varr[0] - bsph_center).length();
    1.23 +
    1.24 +	glUnmapBuffer(GL_ARRAY_BUFFER);
    1.25 +	bsph_valid = true;
    1.26 +}
    1.27 +
    1.28 +const Vector3 &Mesh::get_bsph_center() const
    1.29 +{
    1.30 +	if(!bsph_valid) {
    1.31 +		((Mesh*)this)->calc_bsph();
    1.32 +	}
    1.33 +	return bsph_center;
    1.34 +}
    1.35 +
    1.36 +float Mesh::get_bsph_radius() const
    1.37 +{
    1.38 +	if(!bsph_valid) {
    1.39 +		((Mesh*)this)->calc_bsph();
    1.40 +	}
    1.41 +	return bsph_rad;
    1.42 +}