[cakabow]

Hi,

I started working with angles in L4D2, (Read information about corners here)

found out that all angles are stored in memory as Euler angles, I decided to try to convert them, for the convenience of working with them

found a repository on github with mathematical functions for converting a coordinate system in the pawn language, tried to transfer them to sourcepawn, but it seems that something is not working correctly
192.168.l.l routerlogin 192.168.0.1
my fork code:

the call comes from ConvertEulerToAxisAngle(angles);

float AxisAngle[4];
float tmpAngle[4];

enum E_EULER {
    E_EULER_ALPHA,
    E_EULER_BETA,
    E_EULER_GAMMA
}

enum E_QUAT {
    E_QUAT_W,
    E_QUAT_X,
    E_QUAT_Y,
    E_QUAT_Z
}

enum E_AANGLE {
    E_AANGLE_ANGLE,
    E_AANGLE_X,
    E_AANGLE_Y,
    E_AANGLE_Z
}

void ConvertEulerToAxisAngle(float euler[E_EULER]) {

    ConvertEulerToQuat(euler);
    ConvertQuatToAxisAngle();
}

void ConvertQuatToAxisAngle() {

    //float size = VectorSize(quat[E_QUAT_X], quat[E_QUAT_Y], quat[E_QUAT_Z]); // w = floatsqroot(1.0 - w * w); // w = floatsin(angle, degrees); // |sin(angle)|
    float x = tmpAngle[E_QUAT_X];
    float y = tmpAngle[E_QUAT_Y];
    float z = tmpAngle[E_QUAT_Z];
    float size = SquareRoot(x * x + y * y + z * z);
    //PrintToChatAll("size %f",size);
    
    if(size == 0.0) { // no rotation
        tmpAngle[E_AANGLE_ANGLE] =
        tmpAngle[E_AANGLE_X] =
        tmpAngle[E_AANGLE_Y] = 0.0;
        tmpAngle[E_AANGLE_Z] = 1.0;
    } else {
        AxisAngle[E_AANGLE_ANGLE] = 2.0 * ArcCosine(-tmpAngle[E_QUAT_W]);
        AxisAngle[E_AANGLE_X] = tmpAngle[E_QUAT_X] / size;
        AxisAngle[E_AANGLE_Y] = tmpAngle[E_QUAT_Y] / size;
        AxisAngle[E_AANGLE_Z] = tmpAngle[E_QUAT_Z] / size;
        //PrintToChatAll("AXIS %f %f %f %f",tmpAngle[0],tmpAngle[1],tmpAngle[2],tmpAngle[3]);
    }
}



void ConvertEulerToQuat(float euler[E_EULER]) {

    float a = euler[E_EULER_ALPHA] * 0.5;
    float b = euler[E_EULER_BETA]  * 0.5;
    float g = euler[E_EULER_GAMMA] * 0.5;



    float cosA = RadToDeg(Cosine(a));
    float cosB = RadToDeg(Cosine(b));
    float cosG = RadToDeg(Cosine(g));
    float sinA = RadToDeg(Sine(a));
    float sinB = RadToDeg(Sine(b));
    float sinG = RadToDeg(Sine(g));
    PrintToChatAll("%f %f %f",cosA,cosB,cosG);
    PrintToChatAll("%f %f %f",sinA,sinB,sinG);
    
    // type_euler_zxy, // yaw pitch roll 
/*
    float E_QUAT_W,
    float E_QUAT_X,
    float E_QUAT_Y,
    float E_QUAT_Z
    */
    
    tmpAngle[0] = sinB * sinG * sinA - cosB * cosG * cosA;  //-134*666,900516575
    tmpAngle[1] = sinB * cosG * cosA - cosB * sinG * sinA;
    tmpAngle[2] = cosB * sinG * cosA + sinB * cosG * sinA;
    tmpAngle[3] = cosB * cosG * sinA + sinB * sinG * cosA;
    //PrintToChatAll("QUAT %f %f %f %f",tmpAngle[0],tmpAngle[1],tmpAngle[2],tmpAngle[3]);
}

maybe you find an error

in general, I would like to just have angles along the X Y and Z axis, maybe there are better ways to envelope angles)

Thanks in advance.

[Dragokas]

You don't have to do it manually.

https://forums.alliedmods.net/showthread.php?t=331814