OpenGL options
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- Selection lines by software(emulateFrontBuffer): on some configurations dynamic lines, such the ones used when selecting entities or zooming in or out, are not drawn or are drawn leaving some ghost lines behind the mouse cursor. Select this option of make these problems disappear. Particularly on Intel graphics with fast visualization mode, this option should be enabled as dynamics lines are not supported by the Intel graphic drivers.
- Antialiasing of points, lines and polygons: Reduces the 'staircase' effect when drawing lines, points...
- Selection only visible: experimental option to graphically select entities coding ids by colors. As secondary effect will select only visible parts (the final id-colors of the image created internally for this selection).
Drawing method
Several algorithms are used in GiD to draw meshes faster, but which rely on the underlying hardware at different levels. Faster methods needs good hardware graphics and driver support, slower methods are safer and independent of the graphics capabilities available.
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- Render normal: if set, the preprocess mesh is coloured colored using the layer colourcolor. If not set, then the Element colour color is used as defined in Colors.
- Under Draw spheres as and Draw points as, the speed and quality of the mesh element type sphere and point can be configured, as there are several methods to draw spheres and points:
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- Exact contour fills (only with Display list and Immediate mode drawing methods, only in postprocess): if set, each element is subdivided into single colour color sub-elements according to the colour color scale, in order to get a better quality and limit representation of the colour color bands. This option is only available with Display lists or Immediate mode drawing methods.
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