OBJ File Format - PowerPoint PPT Presentation

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OBJ File Format

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  1. OBJ File Format 2005/10/03

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

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

  5. OBJ File Format (Cont.) • g: group nameex: g body • usemtl: name a material to useex: usemtl black • s: group numberex: s 4