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/* -*- Mode: c++ -*- */
/***************************************************************************
* position_power.h
*
* Wed Jul 24 15:05:26 CEST 2024
* Copyright 2024 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#pragma once
#include "instrument.h"
#include <vector>
class Sample;
//!
//! Consider samples in the samplelist as a two dimensional "point cloud" - each
//! also pointing to sample data (which is not used here):
//!
//! (vel)
//! S_v
//! max ^
//! |x x
//! | x x x
//! | x x
//! | x x
//! | x x x
//! min |________________> S_p (pos)
//! center rim
//!
//! N: is the total number of samples
//!
//! S, is a specific sample
//! S_v, is the sample's velocity
//! S_p, is the sample's position
//!
//! I_v, is the input note velocity
//! I_p, is the input note position
//!
//! -----
//!
//! Define the range R with width R_w around I_p, such that at least N/4 samples are
//! included (note the count N/4 probably needs narrowing):
//!
//! (vel)
//! S_v
//! max ^
//! |x x
//! | x . +. x
//! | . + . x
//! | x. . x
//! | x . +.x
//! min |____._____._____> S_p (pos)
//! center . ^ . rim
//! . I_p .
//! { R }
//! x is a sample that is not included in the set, + is a sample that is.
//!
//! Now for the range R, find the R_max velocity and the R_min velocity.
//! Use these as the boundaries for the velocity [0; 1] range.
//!
//! If no position information is available, the range will include all samples in
//! the range, because all have the default value 0.
//! This mimics perfectly the behaviour we have today.
//!
//! \param samplelist is the search space, \param position is the search origo (S_p)
//! \returns a tuple {R_min, R_max}, which defaults to {0, 1} if the samplelist is empty
Instrument::PowerRange positionPower(const std::vector<Sample*>& samplelist, double position);
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