Surface Chart

This chart type enables visualization of 3D surface data. Currently the library implements two types of surfaces: "standard" and "levels". In case of the "standard" surface each grid cell is assigned a color according to a level color corresponding to the value of left bottom point.

For the "level" surface each cell is intersected with horizontal planes (where the plane Y value corresponds to a level) and polygons, which were created by intersection of grid cell with the planes, are painted with appropriate level colors.

The following options can be applied to a surface chart:

• Set Frame Style (none, countur, mesh, mesh and countur)
• Set custom frame color
• Enable frame transparency
• Set surface transparency
• Set "wireframe" (the interior of grid cells is not filled)
• Set number of color levels (the limit is 256; however, too many colors slows down the rendering) 
• Set one of three methods to generate level colors:
• single - takes the first series theme color
• multiple - takes all series theme colors
• palette - takes rainbow colors
  
• Set custom colors to generate level colors
• Level range can be based on minimum and maximum on Y axis, min/max on series, or custom
• "Draw flat" - the levels and their colors will be calculated for 3D surface, but all grid cells will be rendered at the specified Y value making a colored flat surface.

Multiple Color Surface Chart:

Levels Surface Chart:

Intersected Surfaces:

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