TEST(Transformable_objects, have_a_position_rotation_and_scaling)
{
Transformable t;
EXPECT_EQ(vec3(0,0,0), t.position());
EXPECT_EQ(vec3(1,1,1), t.scaling());
EXPECT_EQ(quat(0,0,0,1), t.rotation());
}
TEST(Transformable_objects, can_be_rotated)
{
Transformable t;
quat rotationX(Transformable::X_AXIS, toRadian(90));
quat rotationY(Transformable::Y_AXIS, toRadian(180));
EXPECT_EQ(quat(0,0,0,1), t.rotation());
t.rotateTo(rotationX);
EXPECT_EQ(normalize(rotationX), t.rotation());
t.rotateTo(Transformable::Y_AXIS, toRadian(180));
EXPECT_EQ(normalize(rotationY), t.rotation());
t.rotate(quat(Transformable::X_AXIS, toRadian(90)));
EXPECT_EQ(normalize(rotationX * rotationY), t.rotation());
t.rotate(Transformable::X_AXIS, toRadian(-90));
EXPECT_EQ(normalize(rotationY), t.rotation());
}
// SetTransformation
void
ChannelTransform::SetTransformation(const Transformable& other)
{
// calc affine parameters
// translation
double tx;
double ty;
other.translation(&tx, &ty);
// rotation
double rotation = agg::rad2deg(other.rotation());
// scale
double scaleX;
double scaleY;
other.scaling(&scaleX, &scaleY);
if (isnanf(tx) || isnanf(ty) || isnanf(scaleX) || isnanf(scaleY))
return;
SetTransformation(B_ORIGIN, BPoint(tx, ty), rotation, scaleX, scaleY);
}