ssqpy.model.terrain

terrain

Submodule containing the Terrain class, used to define the 3D terrain
that the system model acts in. By default, this is the predefined
FlatTerrain class.

SlopeTerrain

SlopeTerrain(slope_x, slope_y=0.0, base_height=0.0)

Bases: Terrain

Slope terrain
Height is \(h = h_0 + s_x x + s_y y\), where \(s_x\) and \(s_y\) are the slopes
along the x and y axes (rise over run)

StepTerrain

StepTerrain(x_start, step_height, step_length=1.0, num_steps=1, base_height=0.0)

Bases: Terrain

Piecewise flat terrain with a flight of steps along the x axis

Height is base_height for \(x < x_{start}\), then rises by step_height at
x_start and every step_length after that, for num_steps steps in total

The terrain stays at the top step height afterwards; with the default of a
single step, step_length has no effect

HeightmapTerrain

HeightmapTerrain(heights, resolution, x0=0.0, y0=0.0)

Bases: Terrain

Smooth terrain interpolated from a uniform grid of heights
heights(i, j) is the height at \((x_0 + i r, y_0 + j r)\), where \(r\) is the
grid resolution

Heights are interpolated with a bicubic Catmull-Rom spline, which passes
through every grid height and has continuous height and slope

The height second derivatives are piecewise continuous

Outside the grid, the terrain extends flat from its closest edge value