FAQ
Table of contents:
- Are these libraries free?
- Where can I find the libraries?
- I get an error: unable to find library -lGL on Linux
- How do I include these libraries in my multiplatform projects?
- How do I include these libraries in my pure-java projects?
- Artifacts can’t be resolved
- How do I get the current’s device resolution on KorGE?
- Links
- How are issues prioritized?
- How can I close a KorGE Game Window programatically?
- e: Unable to compile C bridges
- e: This declaration is experimental and its usage must be marked with ‘@kotlin.time.ExperimentalTime’
- How is KorGE pronounced
Are these libraries free?
Yes. All these libraries are dual licensed under MIT and Apache 2.0, except some libraries that I have ported from other languages and were not licensed as MIT, that propagate their own license. But in any case, all the licenses used are free and permissive.
Where can I find the libraries?
- You can find the source code of my libraries: https://github.com/korlibs and https://github.com/soywiz.
- I publish all my library binaries at bintray: https://bintray.com/korlibs/korlibs.
- The libraries are also synchronized to jcenter automatically
I get an error: unable to find library -lGL on Linux
Since linux doesn’t include graphic or audio libraries by default,
you might get this error if you try to compile a korge application
with ./gradlew runNativeDebug
.
> Task :linkDebugExecutableLinuxX64 FAILED
e: /home/parallels/.konan/dependencies/clang-llvm-8.0.0-linux-x86-64/bin/ld.lld invocation reported errors
The /home/parallels/.konan/dependencies/clang-llvm-8.0.0-linux-x86-64/bin/ld.lld command returned non-zero exit code: 1.
output:
ld.lld: error: unable to find library -lGL
ld.lld: error: unable to find library -lGLU
ld.lld: error: unable to find library -lglut
ld.lld: error: unable to find library -lopenal
If you are using Ubuntu or other Debian-based distro, you can execute the following command to install the required libraries:
sudo apt-get -y install freeglut3-dev libopenal-dev libncurses5
You can find this command in the Targets -> Desktop section.
On Solus, you can use this command:
sudo eopkg install glfw-devel freeglut openal-soft-devel ncurses libglu-devel
sudo eopkg install -c system.devel
How do I include these libraries in my multiplatform projects?
The libraries are multiplatform Kotlin projects that uses GRADLE_METADATA to detect supported platforms. They require Gradle 5.5.1 or greater.
settings.gradle
enableFeaturePreview('GRADLE_METADATA')
build.gradle
repositories {
jcenter()
maven { url = uri("https://dl.bintray.com/korlibs/korlibs/") }
}
dependencies {
implementation("com.soywiz.korlibs.klock:klock:1.6.1")
}
How do I include these libraries in my pure-java projects?
build.gradle
dependencies {
// ...
implementation("com.soywiz.korlibs.klock:klock-jvm:1.6.1")
}
You might need to disambiguate in some cases:
implementation("com.soywiz.korlibs.klock:klock-jvm:1.6.1") {
attributes {
attribute(org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType.attribute, org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType.jvm)
}
}
Artifacts can’t be resolved
Check that you are using at least Gradle 5.5.1
./gradlew --version
You can update it with:
./gradlew wrapper --gradle-version=5.5.1
Check that you have the repositories set
repositories {
jcenter()
maven { url = uri("https://dl.bintray.com/korlibs/korlibs/") }
}
How do I get the current’s device resolution on KorGE?
KorGE doesn’t provide a direct way of getting the device resolution. This is intended to simplify your code. Instead you use a Virtual Resolution, and an Extended Virtual Resolution when your virtual Aspect Ratio doesn’t match the one’s from the device. Similar to OpenGL and some engines default (-1,+1) screen coordinates, but with the dimensions defined by you.
Links
Slack
GitHub
GitHub Sponsors / Donations
OpenCollective
How are issues prioritized?
In normal circumstances, bugs and sponsored tickets coming from sponsors are done first.
There is a Kanban board at GitHub here where you can see the progress and the current prioritization: https://github.com/orgs/korlibs/projects/1
How can I close a KorGE Game Window programatically?
views.gameWindow.close()
e: Unable to compile C bridges
sudo apt install libncurses5
e: This declaration is experimental and its usage must be marked with ‘@kotlin.time.ExperimentalTime’
/build/platforms/native-desktop/bootstrap.kt: (5, 98): This declaration is experimental and its usage must be marked with '@kotlin.time.ExperimentalTime' or '@OptIn(kotlin.time.ExperimentalTime::class)'
If you main entry point of Korge is using @ExperimentalTime
or other experimental APIs
you have to replace it with @OptIn(ExperimentalClass::class)
eg. @OptIn(ExperimentalTime::class)
.
How is KorGE pronounced
Since this was not specified from the very beginning, we used up to three different pronunciations for it.
The original pronounciation is like saying Jorge in Spanish but starting with K.
Can you listen it here: