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Visualize scalar fields #9

Closed kjordahl closed 9 years ago

kjordahl commented 9 years ago

We should be able to visualize scalar fields, either as contour lines or image maps (filled contours).

Start with the salinity data (short name salt), as in the examples on PONG website (note log color scale).

Either surface or bottom fields should be viewable, but not arbitrary depth slices.

johntyree commented 9 years ago

This one shouldn't interfere too much with the other changes outstanding. I'll work on this next.

johntyree commented 9 years ago

Getting the colors right is surprisingly hard.

Heat mapping it sucks. #40.

Using polygon shading isn't possible without some clever tricks. Because we are clipping data, both due to masking and because of the domain, our contour polygons are incomplete. What typically happens is that a huge contour runs from one side of the domain to the other and then clips at the end of the domain, so the two ends are assumed to be connected so that the polygon remains closed.

johntyree commented 9 years ago

This is almost taken care of by #38, but still needs a color bar of some sort.

kjordahl commented 9 years ago

Closing this, since #44 covers the color bar.