spieleprogrammierer.de - Forum und Wiki zur Spieleprogrammierung und Spieleentwicklung

C-/C++-Quelltext

void mat4::lookAt(const float x, const float y, const float z, const float xlook, const float ylook, const float zlook, const float xup, const float yup, const float zup){
    mat4 m;
    vec3 dir, right, up, eye;
 
    eye.x = x;
    eye.y = y;
    eye.z = z;

    up.x = xup;
    up.y = yup;
    up.z = zup;

    dir.x = (xlook-x);
    dir.y = (ylook-y);
    dir.z = (zlook-z);
    dir.normalize();

    right.cross(dir, up);
    right.normalize();

    up.cross(right, dir);
    up.normalize();
 
    m.values[0] = right.x;
    m.values[4] = right.y;
    m.values[8] = right.z;
    m.values[12] = -right.dot(eye);
 
    m.values[1] = up.x;
    m.values[5] = up.y;
    m.values[9] = up.z;
    m.values[13] = -up.dot(eye);
 
    m.values[2] = -dir.x;
    m.values[6] = -dir.y;
    m.values[10] = -dir.z;
    m.values[14] = dir.dot(eye);
 
    m.values[3] = 0;
    m.values[7] = 0;
    m.values[11] = 0;
    m.values[15] = 1;

    *this *= m;
}