gautamm@ncsa.uiuc.edu (Gautam Mehrotra) (03/14/91)
In article <1991Mar13.233202.25268@jarvis.csri.toronto.edu> drb@eecg.toronto.edu (David R. Blythe) writes: >In article <38945@netnews.upenn.edu> joe@retina.anatomy.upenn.edu (Joseph Panico) writes: >>in MOVIE.BYU format. Where can I get MOVIE.BYU and the data formats for >>both MOVIE.BYU and Wavefront's personal visualizer? >> >> Joe Panico [ description of MOVIE>BYU's format deleted] >I have seen a number of programs that understand this format so its probably >worth knowing. So does anybody know the file formats for the personal >visualizer? > david blythe Matthew Arrott posted a description of the format some time back. [ The Subject header on his article was mysteriously missing ..]. I am posting a copy for those who missed it ..... Matt's article follows ... ----------------------------------------------------------- If I am not mistaken one can call both institutions for this information. The wavefront object format, if I remember correctly is the same as their advanced animation package. That is as follows: # This is a comment line # # One moviable object per file. In other words, a file is the atomic # unit of a rigid body system # The UNIX directory structure is used as the database structure # # "\" The backlash character is used for line continuation # "!" is used as an end of line comment o square ! object name : Not used in the advanced animation package [optional] mtllib my.mtl your.mtl project.mtl ... ! material library search ! path [optional] maplib my.map your.map ... ! map library search path ![optional] usemtl red ! current material : all subsequent geometry will be ! assigned this material [optional] usemap logo ! current map : all subsequent geometry will be assigned ! this map [optional] usemap off ! turn texture mapping off for subsequent geometry # Maps are the definition of the application of textures to the material # properties of the object : # # the mapping of the texture to the materials of the object # # This definition of the material/texture relationship is not the # definition of the uvw space of the # texture to the xyz space of the geometry. That definition is # facilitated through texture verticies # which are dicussed shortly. # # Material and Map files have there own formats # Material files are discussed after the object file. s 1 ! smoothing group : average vertex normals for shared verticies !of the same smoothing group s off ! turn smoothing off v 0.0 0.0 0.0 ! vertex position v 1.0 0.0 0.0 v 1.0 1.0 0.0 v 0.0 1.0 0.0 vt 0.0 0.0 0.0 ! texture vertex position vt 0.0 1.0 0.0 vt 1.0 1.0 0.0 vt 1.0 0.0 0.0 vn -1.0 -1.0 1.0 ! vertex normal : may override the smoothing notion, !may need to be normalized vn 1.0 -1.0 1.0 vn 1.0 1.0 1.0 vn -1.0 1.0 1.0 p 1 2 3 4 ! a series of four points made up of four index ! references to verticies ( 1 base ) l 1 2 3 4 ! a line made up of four points with the !topology of vertex 1 to 2 to 3 to 4 f 1 2 3 4 ! a face (polygon) made up of four verticies. !Counter clockwise ordering f 1/1 2/2 3/3 4/4 ! a face with index references to texture verticies f 1/1/1 2/2/2 3/3/3 4/4/4 ! a face with index references to texture !verticies and vertex normals f 1//1 2//2 3//3 4//4 ! a face with index references to ! vertex normals f -4 -3 -2 -1 ! a face using relative vertex referencing. "-N" ! reads: use N vertex ago # vertices, texture verticies, vertex normals, points, lines, and face # can be intermixed as long # as the referenced stuff is defined before it is referenced. Material file # special characters are the same. newmtl red Ka 0.1 0.0 0.0 ! ambient color responce Kd 0.4 0.0 0.0 ! diffuse color responce Ks 0.4 0.0 0.0 ! spectular color Ns 20 ! spectular exponent d 1.0 ! dissolve 0.0 -- 1.0 transparent -- opaque illum 1 ! illumination model 0:color 1:diffuse ligthing ! 2:diffuse and spectular lighting ------------------------------------ End of Matt's article .... hope that helps cheers, gautam --------------------------------------------------------- Gautam Mehrotra, National Center for Supercomputing Applications, Univ of Illinois. e-mail: gautamm@ncsa.uiuc.edu ----------------------------------------------------------