vector3d modeler::rotate_axis(vector3d &size, float degrees, int axis) {
float angle = PI * degrees / 180.0;
float cos_angle = cos(angle);
float sin_angle = sin(angle);
float posX = size.getX();
float posY = size.getY();
float posZ = size.getZ();
float x, y, z;
switch (axis) {
case 0:
x = cos_angle * posX - sin_angle * posY;
y = sin_angle * posX + cos_angle * posY;
z = posZ;
break;
case 1:
x = cos_angle * posX + sin_angle * posZ;
y = posY;
z = -sin_angle * posX + cos_angle * posZ;
break;
case 2:
x = posX;
y = cos_angle * posY - sin_angle * posZ;
z = sin_angle * posY + cos_angle * posZ;
break;
default:
break;
}
return vector3d(x, y, z);
}
