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47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/**********************************************/
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/* One break point linear reed table object */
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/* by Perry R. Cook, 1995-96 */
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/* Consult McIntyre, Schumacher, & Woodhouse */
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/* Smith, Hirschman, Cook, Scavone, */
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/* more for information. */
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/**********************************************/
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#include "ReedTabl.h"
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ReedTabl :: ReedTabl() : Object()
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{
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offSet = 0.6; /* Offset is a bias, related to reed rest position */
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slope = -0.8; /* Slope corresponds loosely to reed stiffness */
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}
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ReedTabl :: ~ReedTabl()
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{
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}
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void ReedTabl :: setOffset(double aValue)
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{
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offSet = aValue; /* Offset is a bias, related to reed rest position */
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}
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void ReedTabl :: setSlope(double aValue)
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{
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slope = aValue; /* Slope corresponds loosely to reed stiffness */
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}
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MY_FLOAT ReedTabl :: lookup(double deltaP)
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/* Perform "Table Lookup" by direct clipped */
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/* linear function calculation */
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{ /* deltaP is differential reed pressure */
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lastOutput = offSet + (slope * deltaP); /* compute basic non-linearity */
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if (lastOutput > 1.0) lastOutput = 1.0; /* if other way, reed slams shut */
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if (lastOutput < -1.0) lastOutput = -1.0; /* if all the way open, acts like open end */
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return lastOutput;
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}
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MY_FLOAT ReedTabl :: lastOut()
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{
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return lastOutput;
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}
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