screenpixels.h

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#ifndef OPENSWMM_RENDER_SCREENPIXELS_H
#define OPENSWMM_RENDER_SCREENPIXELS_H
 
namespace OpenSWMM::Render
{
 
constexpr double sceneSizeFromPixels(double pixelSize,
                                     double pixelsPerSceneUnit) noexcept
{
    return (pixelsPerSceneUnit > 0.0)
               ? (pixelSize / pixelsPerSceneUnit)
               : 0.0;
}
 
constexpr double pixelsFromSceneSize(double sceneSize,
                                     double pixelsPerSceneUnit) noexcept
{
    return sceneSize * pixelsPerSceneUnit;
}
 
} // namespace OpenSWMM::Render
 
#endif // OPENSWMM_RENDER_SCREENPIXELS_H