269 lines
6.4 KiB
C++
269 lines
6.4 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file pStatGraph.cxx
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* @author drose
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* @date 2000-07-19
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*/
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#include "pStatGraph.h"
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#include "pStatServer.h"
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#include "pStatFrameData.h"
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#include "pStatCollectorDef.h"
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#include "string_utils.h"
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#include "config_pstatclient.h"
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#include <stdio.h> // for sprintf
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using std::string;
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/**
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*
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*/
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PStatGraph::GuideBar::
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GuideBar(double height, const string &label, PStatGraph::GuideBarStyle style) :
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_height(height),
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_label(label),
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_style(style)
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{
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}
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/**
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*
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*/
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PStatGraph::GuideBar::
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GuideBar(const PStatGraph::GuideBar ©) :
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_height(copy._height),
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_label(copy._label),
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_style(copy._style)
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{
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}
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/**
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*
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*/
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PStatGraph::
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PStatGraph(PStatMonitor *monitor, int xsize, int ysize) :
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_monitor(monitor),
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_xsize(xsize),
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_ysize(ysize)
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{
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_target_frame_rate = pstats_target_frame_rate;
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_labels_changed = false;
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_guide_bars_changed = false;
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_guide_bar_units = GBU_ms;
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}
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/**
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*
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*/
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PStatGraph::
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~PStatGraph() {
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}
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/**
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* Returns the number of horizontal guide bars that should be drawn, based on
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* the indicated target frame rate. Not all of these may be visible; some may
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* be off the top of the chart because of the vertical scale.
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*/
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int PStatGraph::
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get_num_guide_bars() const {
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return _guide_bars.size();
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}
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/**
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* Returns the nth horizontal guide bar. This should be drawn as a horizontal
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* line across the chart at the y pixel location determined by
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* height_to_pixel(bar._height).
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*
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* It is possible that this bar will be off the top of the chart.
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*/
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const PStatGraph::GuideBar &PStatGraph::
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get_guide_bar(int n) const {
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#ifndef NDEBUG
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static GuideBar bogus_bar(0.0, "bogus", GBS_normal);
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nassertr(n >= 0 && n < (int)_guide_bars.size(), bogus_bar);
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#endif
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return _guide_bars[n];
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}
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/**
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* Returns the current number of user-defined guide bars. Not all of these
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* may be visible.
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*/
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int PStatGraph::
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get_num_user_guide_bars() const {
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return _monitor->get_server()->get_num_user_guide_bars();
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}
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/**
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* Returns the nth user-defined guide bar.
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*/
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PStatGraph::GuideBar PStatGraph::
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get_user_guide_bar(int n) const {
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double height = _monitor->get_server()->get_user_guide_bar_height(n);
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return make_guide_bar(height, GBS_user);
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}
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/**
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* Adjusts the height of the nth user-defined guide bar.
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*/
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void PStatGraph::
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move_user_guide_bar(int n, double height) {
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_monitor->get_server()->move_user_guide_bar(n, height);
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}
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/**
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* Creates a new user guide bar and returns its index number.
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*/
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int PStatGraph::
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add_user_guide_bar(double height) {
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return _monitor->get_server()->add_user_guide_bar(height);
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}
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/**
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* Removes the user guide bar with the indicated index number. All subsequent
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* index numbers are adjusted down one.
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*/
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void PStatGraph::
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remove_user_guide_bar(int n) {
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_monitor->get_server()->remove_user_guide_bar(n);
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}
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/**
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* Returns the index number of the first user guide bar found whose height is
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* within the indicated range, or -1 if no user guide bars fall within the
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* range.
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*/
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int PStatGraph::
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find_user_guide_bar(double from_height, double to_height) const {
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return _monitor->get_server()->find_user_guide_bar(from_height, to_height);
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}
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/**
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* Returns a string representing the value nicely formatted for its range.
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*/
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string PStatGraph::
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format_number(double value) {
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char buffer[128];
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if (value < 0.01) {
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sprintf(buffer, "%0.4f", value);
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} else if (value < 0.1) {
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sprintf(buffer, "%0.3f", value);
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} else if (value < 1.0) {
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sprintf(buffer, "%0.2f", value);
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} else if (value < 10.0) {
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sprintf(buffer, "%0.1f", value);
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} else {
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sprintf(buffer, "%0.0f", value);
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}
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return buffer;
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}
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/**
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* Returns a string representing the value nicely formatted for its range,
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* including the units as indicated.
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*/
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string PStatGraph::
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format_number(double value, int guide_bar_units, const string &unit_name) {
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string label;
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if ((guide_bar_units & GBU_named) != 0) {
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// Units are whatever is specified by unit_name, not a time unit at all.
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label = format_number(value);
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if ((guide_bar_units & GBU_show_units) != 0 && !unit_name.empty()) {
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label += " ";
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label += unit_name;
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}
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} else {
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// Units are either milliseconds or hz, or both.
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if ((guide_bar_units & GBU_ms) != 0) {
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double ms = value * 1000.0;
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label += format_number(ms);
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if ((guide_bar_units & GBU_show_units) != 0) {
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label += " ms";
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}
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}
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if ((guide_bar_units & GBU_hz) != 0) {
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double hz = 1.0 / value;
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if ((guide_bar_units & GBU_ms) != 0) {
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label += " (";
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}
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label += format_number(hz);
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if ((guide_bar_units & GBU_show_units) != 0) {
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label += " Hz";
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}
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if ((guide_bar_units & GBU_ms) != 0) {
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label += ")";
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}
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}
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}
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return label;
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}
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/**
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* Resets the list of guide bars.
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*/
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void PStatGraph::
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update_guide_bars(int num_bars, double scale) {
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_guide_bars.clear();
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// We'd like to draw about num_bars bars on the chart. But we also want the
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// bars to be harmonics of the target frame rate, so that the bottom bar is
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// at tfrn or n * tfr, where n is an integer, and the upper bars are even
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// multiples of that.
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// Choose a suitable harmonic of the target frame rate near the bottom part
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// of the chart.
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double bottom = (double)num_bars / scale;
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double harmonic;
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if (_target_frame_rate < bottom) {
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// n * tfr
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harmonic = floor(bottom / _target_frame_rate + 0.5) * _target_frame_rate;
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} else {
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// tfr n
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harmonic = _target_frame_rate / floor(_target_frame_rate / bottom + 0.5);
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}
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// Now, make a few bars at k harmonic.
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for (int k = 1; k / harmonic <= scale; k++) {
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_guide_bars.push_back(make_guide_bar(k / harmonic));
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}
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_guide_bars_changed = true;
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}
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/**
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* Makes a guide bar for the indicated elapsed time or level units.
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*/
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PStatGraph::GuideBar PStatGraph::
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make_guide_bar(double value, PStatGraph::GuideBarStyle style) const {
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string label = format_number(value, _guide_bar_units, _unit_name);
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if ((style == GBS_normal) &&
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(_guide_bar_units & GBU_named) == 0) {
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// If it's a time unit, check to see if it matches our target frame rate.
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double hz = 1.0 / value;
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if (IS_THRESHOLD_EQUAL(hz, _target_frame_rate, 0.001)) {
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style = GBS_target;
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}
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}
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return GuideBar(value, label, style);
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}
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