37 lines
1.1 KiB
Text
37 lines
1.1 KiB
Text
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class:: Warp
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summary:: specification of a shape for a mapping of numerical input
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related:: Classes/ControlSpec, Classes/Spec
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categories:: Control, Spec
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description::
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The subclasses of Warp specify translations from input (a number) to an output (another number). This is an abstract class - already available shapes are emphasis::linear, exponential, sine, cosine, decibel, curve:: (this is similar to the curves in envelopes, see also link::Classes/Env::).
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Warps are internally created by link::Classes/ControlSpec::. Usually they are created by the message strong::asWarp::, understood by symbols and numbers. A warp has a link::Classes/Spec:: to specify a certain range of input and output values.
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code::
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// create a new warp:
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a = \exp.asWarp;
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a = -4.asWarp; // a curve warp;
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::
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ClassMethods::
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private::initClass
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InstanceMethods::
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method::map
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Maps and constrains a strong::value:: between 0 and 1 to the output domain.
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method::unmap
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in the output domain to a value in the range between 0 and 1.
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code::
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g = -3.asWarp;
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g.map(0.5);
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g.unmap(0.9);
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// fore and back translation should be identical:
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g.unmap(g.map(0.5));
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::
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