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    <p>OpenGL doesn't really work well with large numbers (like anything over 10.0f, just the way it is designed). It would be better to convert your coordinates to be between -1 and 1 (i.e. normalize) than to try and make openGL use coordinates of 50f or 290f.</p> <p>The reason the coordinates are normalized to between -1 and 1 is because model coordinates are only supposed to be relative to each other and not indicative of their actual dimensions in a specific game/app. The model could be used in many different games/apps with different coordinate systems, so you want all the model coordinates to be in some normalized standard form, so the programmer can then interpret in their own way.</p> <p>To normalize, you loop through all your coordinates and find the value furthest from 0 i.e. </p> <pre><code>float maxValueX = 0; float maxValueY = 0; float maxValueZ = 0; // find the max value of x, y and z for(int i=0;i&lt;coordinates.length'i++){ maxValueX = Math.max(Math.abs(coordinates[i].getX()), maxValueX); maxValueY = Math.max(Math.abs(coordinates[i].getY()), maxValueY); maxValueZ = Math.max(Math.abs(coordinates[i].getZ()), maxValueZ); } // convert all the coordinates to be between -1 and 1 for(int i=0;i&lt;coordinates.length'i++){ Vector3f coordinate = coordinates[i]; coordinate.setX(coordinate.getX() / maxValueX); coordinate.setY(coordinate.getY() / maxValueY); coordinate.setZ(coordinate.getZ() / maxValueZ); } </code></pre> <p>You only need to do this once. Assuming you are storing your data in a file, you can write a little utility program that does the above to the file and save it, rather than doing it every time you load the data into your app</p>
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    1. USJames Coote
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