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Program Options

These are general settings which affect polyscope’s behavior as a library. It is often convenient to set them just before calling polyscope::init, but they may set be anywhere.

#include "polyscope/polyscope.h"

// a few options
polyscope::options::programName = "important app";
polyscope::options::verbosity = 0;
polyscope::options::usePrefsFile = false;

// initialize


std::string options::programName
program name

A general name to use when referring to the program in window headings, etc. Default: Polyscope.


polyscope::options::programName = "important app";

int options::verbosity

How much useful info should polyscope print to std::cout? Default: 1.

  • 0 print nothing
  • 1 print occasionally
  • >= 2 print a lot


polyscope::options::verbosity = 1;

std::string options::printPrefix

A string used as a prefix for all messages printed to the terminal by polyscope. Default: [polyscope].


polyscope::options::printPrefix = "[MYAPP] ";
// prints now look like "[MYAPP] loaded openGL"

bool options::errorsThrowExceptions
errors throw execptions

If true, errors in polyscope throw execptions. If false, a polyscope::error is shown in the UI, but processing attempts to continue. Default: false.

bool options::enableRenderErrorChecks
render error checks

If true, the rendering subsystem will eagerly check for and report errors. This comes at some small performance cost, but can help catch problems.

Default: true when compiled in Debug mode, false in Release mode.

int options::ssaaFactor
SSAA anti-aliasing factor

Enable super-sampling anti-aliasing for a prettier rendered scene. SSAA renders the scene at multiple samples for each pixel, then averages them to resolve final pixel values.

Cost scales quadratically with the value of this parameter, so it will quickly become expensive. Reasonable values are in the range 1 to 4. Using 2 is generally sufficient for anti-aliasing.

Default: 1 (no anti-aliasing)

int options::maxFPS
max fps

The main loop will not run at more than maxFPS iterations per second. -1 disables, running the loop as fast as possible. Default: 60.

bool options::usePrefsFile
use prefs file

Polyscope can read and write to a preferences file to save state between invocations. For now, this is primarily used to restore the window position on the desktop. The preference file is a json-formatted plaintext file called .polyscope.ini.

This option controls the use of the preferences file. If false, if will be neither written nor read. Default: true.

bool options::alwaysRedraw
always redraw

Polyscope is designed to use lazy rendering: the scene is only re-drawn if it has changed since the last time it was drawn. This can dramatically reduce resource consumption, and keeps the immediate GUI responsive even on scenes which are irresponsibly large for the machine’s graphics capabilities.

If this option is true, the scene will be redrawn on every main loop iteration no matter what, circumventing the lazy drawing features. Default: false.

bool options::openImGuiWindowForUserCallback
open imgui window for user callback

If true, an ImGui window will be created and docked to the side of the UI when the user callback function is invoked. This means you can immediately start making ui calls like ImGui::Button("do stuff").

If false, no ImGui anything will be pushed on the stack when the callback is invoked, and the user is entirely responsible for making any ImGui calls (or not making any).

Default: true.

bool options::invokeUserCallbackForNestedShow
invoke user callback for nested show

Suppose you call polyscope::show(), and within your callback, another instance of polyscope::show() is called—this is a nested show.

Depending on the situation, you might or might not want your userCallback to continue being executed on each render loop iteration of this nested viewer; this setting exposes the option.

If true, your callback will be executed as normal for every main loop iteration, even in nested show windows.

If false, your callback will only be executed for initial, outermost calls to polyscope::show().

Default: false.