angle

void calculateAngle(Object &object, int mouseX, int mouseY) {
    double centreX, centreY, MouseX, MouseY;
    MouseX = (double)mouseX;
    MouseY = (double)mouseY;
    centreX = (double) (object.x + ((double) (object.w / 2)));
    centreY = (double) (object.y + ((double) (object.h / 2)));
    if (MouseX == centreX && MouseY == centreY)
        return;
    else if (MouseX < centreX && MouseY == centreY)
        object.angle = 0;
    else if (MouseX == centreX && MouseY < centreY)
        object.angle = 90;
    else if (MouseX > centreX && MouseY == centreY)
        object.angle = 180;
    else if (MouseX == centreX && MouseY > centreY) {
        object.angle = 270;
    }
    else {
        double adjacent = abs(centreX - MouseX);
        double opposite = abs(centreY - MouseY);
        int quadrantNum;
        if (MouseX < centreX && MouseY < centreY)
            quadrantNum = 0;
        else if (MouseX > centreX && MouseY < centreY)
            quadrantNum = 1;
        else if (MouseX > centreX && MouseY > centreY)
            quadrantNum = 2;
        else if (MouseX < centreX && MouseY > centreY)
            quadrantNum = 3;
        if (quadrantNum % 2 == 0)
            object.angle = opposite / adjacent;
        else
            object.angle = adjacent / opposite;
        object.angle = (((atan(object.angle)) * 180) / M_PI) + (90 * quadrantNum);
    }
}