test_negheights.x3d using X_ITE

X_ITE X3D Browser   Test negative heights. This test attempts to draw an ElevationGrid using positive and negative values for the height field. The test should generate a grid with ten heights > 0. The rest of the heights should be 0.

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     Original X3D model: test_negheights.x3d
X3D Examples Archive: https://www.web3d.org/x3d/content/examples/ConformanceNist/Geometry/ElevationGrid/test_negheightsIndex.html

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