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Lab talk, the good, the bad, and the ugly
Dental-CAD
Different versions of .obj file format?
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<blockquote data-quote="Jussi Roivanen" data-source="post: 358528" data-attributes="member: 16108"><p>Pure .obj (wavefront obj) is set of text (ascii) instructions that define how to draw a shape. It does not contain texture/material/color information. Separate Material file (.mtl, wavefront material) can be associated with .obj but it does not support bitmaps (jpg/png),it deals with certain mapped texture files.</p><p></p><p>Binary obj is, as far as i know, line-by-line string conversion to zeroes and ones, to binary format (using ascii tables).</p><p></p><p>There can be Vendor (software) Specific Extensions in .obj. In theory can be used to store object color (even in ascii format quite easily) and even if binary format is used, those extensions can be used to embed texture (since jpg/png are images, which are binaries). Vendor specific extensions are, and should be, ignored by other programs since it is virtually impossible to know how those instructions should be interpeted.</p><p></p><p>erzdaemons solution is solid: open obj in program that can handle textures as well, map textures and then export with format (like ply) which actually supports textures/materials.</p></blockquote><p></p>
[QUOTE="Jussi Roivanen, post: 358528, member: 16108"] Pure .obj (wavefront obj) is set of text (ascii) instructions that define how to draw a shape. It does not contain texture/material/color information. Separate Material file (.mtl, wavefront material) can be associated with .obj but it does not support bitmaps (jpg/png),it deals with certain mapped texture files. Binary obj is, as far as i know, line-by-line string conversion to zeroes and ones, to binary format (using ascii tables). There can be Vendor (software) Specific Extensions in .obj. In theory can be used to store object color (even in ascii format quite easily) and even if binary format is used, those extensions can be used to embed texture (since jpg/png are images, which are binaries). Vendor specific extensions are, and should be, ignored by other programs since it is virtually impossible to know how those instructions should be interpeted. erzdaemons solution is solid: open obj in program that can handle textures as well, map textures and then export with format (like ply) which actually supports textures/materials. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAD
Different versions of .obj file format?
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