For each model in the database, there are following files:
	1. .bmp file: 
		the snapshot of model
	2. .obj/.off file: 
		3D mesh model 
	3. .sif and .obb file:
		They are used to register models. the .sif file specifies the up direction and right direction of the model. The .obb file stores the oriented bounding box of the model. If the up and right directions from .sif file are not accurate enough, OBB can be used to adjust the directions.


Note: if models in database look too big or too small with their original 3D vertex positions, we need to scale those models so that they would be of similar sizes as real objects in the images we captured with Microsoft Kinect.



How to read .obb file:
	
bool COBB::load(FILE *fp)
{
	fread(&x_axis[3],sizeof(double),3,fp);	//axis X
	fread(&y_axis[3],sizeof(double),3,fp);	//axis Y
	fread(&z_axis[3],sizeof(double),3,fp);	//axis Z
	fread(&center[3],sizeof(double),3,fp);	//center pos
	fread(&hl[3],sizeof(double),3,fp);	//half length of each axis
	return true;
}
		