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along a geometry The new expression functions are: - triangular_wave: Constructs triangular waves along the boundary of a geometry. - square_wave: Constructs square/rectangular waves along the boundary of a geometry - wave: Constructs rounded (sine-like) waves along the boundary of a geometry - triangular_wave_randomized: Constructs randomized triangular waves along the boundary of a geometry - square_wave_randomized: Constructs randomized square/rectangular waves along the boundary of a geometry. - wave_randomized: Constructs randomized curved (sine-like) waves along the boundary of a geometry
18 lines
1008 B
Plaintext
18 lines
1008 B
Plaintext
{
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"name": "triangular_wave_randomized",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Constructs randomized triangular waves along the boundary of a geometry.",
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"arguments": [
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{"arg":"geometry","description":"a geometry"},
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{"arg":"min_wavelength","description":"minimum wavelength of waves"},
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{"arg":"max_wavelength","description":"maximum wavelength of waves"},
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{"arg":"min_amplitude","description":"minimum amplitude of waves"},
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{"arg":"max_amplitude","description":"maximum amplitude of waves"},
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{"arg":"seed","optional": true, "default": "0", "description":"specifies a random seed for generating waves. If the seed is 0, then a completely random set of waves will be generated."}
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],
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"examples": [
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{ "expression":"triangular_wave_randomized(geom_from_wkt('LineString(0 0, 10 0)'), 2, 3, 0.1, 0.2)", "returns":"Randomly sized triangular waves with wavelengths between 2 and 3 and amplitudes between 0.1 and 0.2 along the linestring"}
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]
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}
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