pStatPianoRoll.I

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file pStatPianoRoll.I
 * @author drose
 * @date 2000-07-18
 */

/**
 * Changes the amount of time the width of the horizontal axis represents.
 * This may force a redraw.
 */
INLINE void PStatPianoRoll::
set_horizontal_scale(double time_width) {
  if (_time_width != time_width) {
    _time_width = time_width;
    normal_guide_bars();
    force_redraw();
  }
}

/**
 * Returns the amount of total time the width of the horizontal axis
 * represents.
 */
INLINE double PStatPianoRoll::
get_horizontal_scale() const {
  return _time_width;
}

/**
 * Converts a timestamp to a horizontal pixel offset.
 */
INLINE int PStatPianoRoll::
timestamp_to_pixel(double time) const {
  return (int)((double)_xsize * (time - _start_time) / _time_width);
}

/**
 * Converts a horizontal pixel offset to a timestamp.
 */
INLINE double PStatPianoRoll::
pixel_to_timestamp(int x) const {
  return _time_width * (double)x / (double)_xsize + _start_time;
}

/**
 * Converts a value (i.e.  a "height" in the strip chart) to a horizontal
 * pixel offset.
 */
INLINE int PStatPianoRoll::
height_to_pixel(double value) const {
  return (int)((double)_xsize * value / _time_width);
}

/**
 * Converts a horizontal pixel offset to a value (a "height" in the strip
 * chart).
 */
INLINE double PStatPianoRoll::
pixel_to_height(int x) const {
  return _time_width * (double)x / (double)_xsize;
}