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There is a nice project here that allows to have operator overloading support.

It is basic but still a huge step for java devs.

There are some drawbacks though at the moment:

• no Netbeans 7.4+ support
• assignment operator is always a new instantiation
• fixed naming convention

    Map<String, String> binary = new HashMap<String, String>() {{
        put("+",    "add");
        put("-",    "subtract");
        put("*",    "multiply");
        put("/",    "divide");
        put("%",    "remainder");
        put("&",    "and");
        put("|",    "or");
        put("^",    "xor");
        put("<<",   "shiftLeft");
        put(">>",   "shiftRight");
        put("<",    compareTo);
        put(">",    compareTo);
        put("<=",   compareTo);
        put(">=",   compareTo);
    }};
    String revSuffix = "Rev";
    Map<String, String> unary = new java.util.HashMap<String, String>() {{
        put("-", "negate");     // jdk7
        put("---", "negate");   // jdk8
        put("~", "not");
    }};
    String   compareTo = "compareTo";
    String   indexGet = "get";
    String[] indexSet = new String[]{"set", "put"};
    String[] valueOf = new String[]{"valueOf", "of"};

I tried to add this library on gradle.build to use it on an Android app. It didn't work. Gradle sync fails because openvr requires API 22 runtimes (not sure if it was sync or build that fails.)

So, I looked into the code and found that not much of the code was using openvr. After realising that, I removed a few lines of code to compile without openvr dependency. Gradle synced, the app was built, and obviously, glm worked on the app without any problem.

For anyone having the same problem as I did, refer to my forked repo if you want to see what parts of the code I modified/removed. There are still many Android 4.0 phones out there. My phone is the very example.

In glm.BasicOperators.java on line 2256 res.y = a.z - bZ; should be res.z = a.z - bZ;

implement

The Mat4d class is almost a verbatim copy of JOML's Matrix4f, including the JavaDocs, whose references do not match anymore, because glm just renamed the class and method names.

Examples:
JOML 1.7.1: https://github.com/JOML-CI/JOML/blob/5b9b0c0aa7e374dba08cfca4fe47bdd9c8cc6d03/src/org/joml/Matrix4f.java#L7283-L7300

glm:

If you want to copy code and even JavaDoc verbatim, then you should at least give credit or ask for permission.