void World::CullLights(VisibleCullResult & result, Camera * cam)
{
List<Light*>::Iterator whr = mLights.Begin();
List<Light*>::Iterator end = mLights.End();
while (whr != end)
{
// current it's false
Light * light = *whr;
if (!light->IsVisible())
continue;
switch (light->GetType())
{
case LT_DIRECTIONAL:
result.lights.PushBack(light);
break;
case LT_POINT:
case LT_SPOT:
{
Sphere sph = Sphere(light->GetPosition(), light->GetRange());
if (cam->IsVisible(sph))
result.lights.PushBack(light);
}
break;
}
++whr;
}
}
void World::GetVisibleLights(Node * node, List<Light*> & lights)
{
profile_code();
lights.Clear();
List<Light*>::Iterator iter;
List<Light*>::Iterator end;
iter = mLights.Begin();
end = mLights.End();
Light * light;
while (iter != end)
{
light = *iter;
if (light->IsVisible())
{
LIGHT_TYPE type = light->GetType();
if (type == LT_DIRECTIONAL)
{
lights.PushBack(light);
}
else if (type == LT_POINT)
{
const Sphere & sph = node->GetWorldBoundingSphere();
float len = Math::VecLength(light->GetPosition() - sph.center);
if (len - sph.radius < light->GetRange())
lights.PushBack(light);
}
else if (type == LT_SPOT)
{
Aabb aabb;
Vec3 ltf, lbf, rtf, rbf;
Vec3 ltb, lbb, rtb, rbb;
Vec3 lp;
float sq1, sq2, sq3, sq4;
float sq5, sq6, sq7, sq8;
float rsq;
Vec3 d1, d2, d3, d4;
Vec3 d5, d6, d7, d8;
Vec3 ld;
float dt1, dt2, dt3, dt4;
float dt5, dt6, dt7, dt8;
float mdt;
aabb = node->GetWorldAabb();
ltf = aabb.GetLeftTopFrontPoint();
lbf = aabb.GetLeftBottomFrontPoint();
rtf = aabb.GetRightTopFrontPoint();
rbf = aabb.GetRightBottomFrontPoint();
ltb = aabb.GetLeftTopBackPoint();
lbb = aabb.GetLeftBottomBackPoint();
rtb = aabb.GetRightTopBackPoint();
rbb = aabb.GetRightBottomBackPoint();
lp = light->GetPosition();
rsq = light->GetRange() * light->GetRange();
sq1 = Math::VecDistanceSq(lp, ltf);
sq2 = Math::VecDistanceSq(lp, lbf);
sq3 = Math::VecDistanceSq(lp, rtf);
sq4 = Math::VecDistanceSq(lp, rbf);
sq5 = Math::VecDistanceSq(lp, ltb);
sq6 = Math::VecDistanceSq(lp, lbb);
sq7 = Math::VecDistanceSq(lp, rtb);
sq8 = Math::VecDistanceSq(lp, rbb);
if (sq1 < rsq || sq2 < rsq || sq3 < rsq || sq4 < rsq ||
sq5 < rsq || sq6 < rsq || sq7 < rsq || sq8 < rsq)
{
ld = light->GetDirection();
mdt = light->GetOuter();
d1 = ltf - lp;
d2 = lbf - lp;
d3 = rtf - lp;
d4 = rbf - lp;
d5 = ltb - lp;
d6 = lbb - lp;
d7 = rtb - lp;
d8 = rbb - lp;
Math::VecNormalize(d1, d1);
Math::VecNormalize(d2, d2);
Math::VecNormalize(d3, d3);
Math::VecNormalize(d4, d4);
Math::VecNormalize(d5, d5);
Math::VecNormalize(d6, d6);
Math::VecNormalize(d7, d7);
Math::VecNormalize(d8, d8);
dt1 = Math::VecDot(ld, d1);
dt2 = Math::VecDot(ld, d2);
dt3 = Math::VecDot(ld, d3);
dt4 = Math::VecDot(ld, d4);
dt5 = Math::VecDot(ld, d5);
dt6 = Math::VecDot(ld, d6);
dt7 = Math::VecDot(ld, d7);
dt8 = Math::VecDot(ld, d8);
if (dt1 > mdt || dt2 > mdt || dt3 > mdt || dt4 > mdt ||
dt5 > mdt || dt6 > mdt || dt7 > mdt || dt7 > mdt)
{
lights.PushBack(light);
}
}
}
}
++iter;
}
}