Hydra - a 3d surface modelling dll

Main fatures:

• Calculation of isolines with colored polygonization, that are generally used in geoinformatics.
• The algorithms are optimized for sparse input data (and for speed). The calculations create a rectangle-shaped grid, whose points are interpolated by the sparse, often unevenly distributed input (height) points.
• Visualization of the calculated data in popup windows (the lines and the surfaces, the latter in 3d, too).
• The popup windows allow the user to configure the visulization, to set:
  • the number of isolines (the height difference between them)
  • the colors of the levels
  • the mode of the coloring:
    • height
    • gradient
    • exposure (the horizontal direction of the given point, the direction the surface 'looks into')
  • the viewpoint in 3d
• Usability with the ECalc: the two dimensional functions can be spectacularly visualized.
• Text-based interface: the data exchange can be done through textual data, too (using the clipboard). This mode was useful in Visual Basic applications.

Screenshots:

Heights and isolines	Heights and isolines in 3d	Exposures	Exposures in 3d	Gradients	Exposures in animation