void nuiLayout::DoLayout(const nuiRect& rRect)
{
nuiRect r(GetRect());
float width = r.GetWidth();
float height = r.GetHeight();
SetHorizontalAnchor("left", 0, eAnchorAbsolute);
SetHorizontalAnchor("right", width, eAnchorAbsolute);
SetVerticalAnchor("top", 0, eAnchorAbsolute);
SetVerticalAnchor("bottom", height, eAnchorAbsolute);
auto it = mConstraints.begin();
while (it != mConstraints.end())
{
nuiWidget* pWidget = it->first;
float left = 0, right = width, top = 0, bottom = height;
nuiRect ideal(pWidget->GetIdealRect());
float l = ideal.Left(), r = ideal.Right(), t = ideal.Top(), b = ideal.Bottom();
const nuiLayoutConstraint& rH(it->second.first);
const nuiLayoutConstraint& rV(it->second.second);
// Horizontal Layout:
ComputeConstraint(rH, l, r, left, right, ideal.GetWidth(), 0);
// Vertical Layout:
ComputeConstraint(rV, t, b, top, bottom, ideal.GetHeight(), 1);
pWidget->SetLayout(nuiRect(l, t, r, b, false));
++it;
}
}
void Physics::RigidConstraint::Solve(int iterationCount)
{
if (ComputeConstraint() >= 0)
return;
float kp = 1 - std::powf(1 - m_stiffness, 1.f / iterationCount);
glm::vec3 correction = -ComputeScalingFactor() * m_points[0]->m_invMass * m_nc * kp;
if (glm::length(correction) > EPS)
m_points[0]->m_projection += correction;
}
float Physics::RigidConstraint::ComputeScalingFactor()
{
float deriv = glm::dot(glm::vec3(1), m_nc);
return ComputeConstraint() / (m_points[0]->m_invMass * deriv * deriv);
}
