Cartesian¶

Type:	section
Appearance:	optional
Excludes:	Triangulation

Defines the texture as a graph on a cartesian grid. A Graph consits of $N*M$ height values where $N$ and $M$ are the number of equidistant grid points in $x$ and $y$ directions.

Cartesian {
   NGridPointsX = 20
   NGridPointsY = 20
   Graph = [z_11 z_12 ...
            z_21 z_22  ...
            .      .
            .        .
            .          . ]
}

There are three ways to define the Cartesian grid in $x$ and $y$ directions.

Set the grid points as vectors: GridPointsX and GridPointsY are the point vectors in $x$ and $y$ , respectively.
Specify number of used grid points: For each coordinate direction, equally spaced grid points are used to sample the bounding box. NGridPointsX and NGridPointsY are the numbers of points in $x$ and $y$ directions, respectively.
Specify the spacing: Each coordinate direction is divided into segments with given length. SpacingX and SpacingY are the spacings in $x$ and $y$ directions, respectively.