1. OBJ File Format 2005/10/03

2. CAIG Lab,NCTU2 OBJ File Format A text file format First character of each line specifies the type of command #: just some comment ex: # 1760 vertices v: vertex ’ s geometric position (float) ex: v 5.942016 -1.063428 1.664500

3. CAIG Lab,NCTU3 OBJ File Format (Cont.) vt: texture coordinate (float from 0~1) ex: vt 0.563604 0.419808 vn: normal vector (float) ex: vn 0.124368 -0.300959 0.945493 f: polygonal face (int) f int int int … f int/int int/int int/int …

4. CAIG Lab,NCTU4 OBJ File Format (Cont.) f int/int/int int/int/int … ex: f 1 2 3 4 f 1/1/1 2/2/2 3/3/3 4/4/4 f 1//1 2//2 3//3 4//4 Must be flat and convex

5. CAIG Lab,NCTU5 OBJ File Format (Cont.) g: group name ex: g body usemtl: name a material to use ex: usemtl black s: group number ex: s 4