ClassiCube/doc/compile-fixes.md

Visual studio unsupported platform toolset

To fix the Error MSB8036 The Windows SDK version 5.1 was not found. Install the required version of Windows SDK or change the SDK version in the project property pages or by right-clicking the solution and selecting "Retarget solution"

• Right click ClassiCube project (it's under the Solution 'ClassiCube' in the Solution Explorer pane)
• Click Properties
• Make sure you are in General tab under Configuration Properties
• You should see a dropdown named Platform Toolset. Click on it.
• Change it to one of the toolsets in the list that pops up.
• Click OK. You should be able to compile now

Common compilation errors

Undefined reference to 'clock_gettime'

Add -lrt when compiling. Occurs when using glibc versions before 2.17.

fatal error: execinfo.h: No such file or directory

Install libexecinfo package. Occurs when using musl.

Undefined reference to 'backtrace'

Add -lexecinfo when compiling. Occurs when using musl.

Webclient patches

Starting game Error 00000002 when setting current directory

This is caused by IndexedDB not being initialised, which also means saved maps are lost when the tab is closed.

Due to how IndexedDB works, you must load and initialise it before the game starts. Change:

    <script type='text/javascript'>
      var Module = {
        preRun: [],
...

to

    <script type='text/javascript'>
      // need to load IndexedDB before running the game
      function preloadIndexedDB() {
        addRunDependency('load-idb');
        FS.mkdir('/classicube');
        FS.mount(IDBFS, {}, '/classicube');
        FS.syncfs(true, function(err) { 
            if (err) window.cc_idbErr = err; 
            removeRunDependency('load-idb');
        })
      }

      var Module = {
        preRun: [ preloadIndexedDB ],
...

Mouse scrolling not properly prevented

With recent chrome/firefox versions, page is still scrolled and console is spammed with
"[Intervention] Unable to preventDefault inside passive event listener due to target being treated as passive."

You need to to register events as a passive handler. Look for something like:

eventHandler.target.addEventListener(eventHandler.eventTypeString, jsEventHandler, eventHandler.useCapture);

and change to

eventHandler.target.addEventListener(eventHandler.eventTypeString, jsEventHandler, { useCapture: eventHandler.useCapture, passive: false });

Texture pack confirm dialog always shows Download size: Determining..

Unfortunately emscripten doesn't store content-length for HEAD http requests. This can be fixed.

First you need to find at what offset emscripten stores content-length. Look for something like:

xhr.onprogress = function(e) {
...
      Fetch.setu64(fetch + 32, e.total);

then look for

xhr.onload = function(e) {
...

and finally change that to

xhr.onload = function(e) { 
    Fetch.setu64(fetch + 32, e.total);
...