An abstract projection class and child mercprojection class #7
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| glm::vec2 MercProjection::PixelsToMeters(glm::vec2 _pix, int _zoom) { |
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I'm not clear on the purpose of the "pixel" functions, the results of any pixel measurements here aren't meaningful without knowing the display size (which only the view module would have, at the moment). Even then, "pixels" are a problematic unit of measurement on mobile devices where native pixel doubling or tripling is common. Measuring tiles in pixels is a common practice on legacy raster tile maps, but I don't know that it has a use for us.
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Generally agree, but there are still cases where you want to refer to & project or un-project a particular point in screenspace. On the WebGL side, I track "CSS pixels" (which are "logical" pixels), and "device pixels" (which are the 2x or 3x ones). We don't need to do that here but we do need a way to transform the position of an individual pixel.
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An abstract projection class and child mercprojection class
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