// returns true iif all corners of bounding-box defined
// by <mins, maxs> lie on the "positive" side of each of
// the frustum's half-spaces (?)
//
// if using quad-tree visibility tests, we can not say
// "if no corner in view, then entire quad invisible"
// (area in between corners might be within frustum)
// proper way would be:
// all points left of left-plane ==> invisible
// all points right of right-plane ==> invisible
// all points above top-plane ==> invisible
// all points below bottom-plane ==> invisible
// all points before near-plane ==> invisible
// all points behind far-plane ==> invisible
bool Camera::InView(const vec3f& mins, const vec3f& maxs) const {
return
AABBInOriginPlane(frustumR, mins, maxs) &&
AABBInOriginPlane(frustumL, mins, maxs) &&
AABBInOriginPlane(frustumB, mins, maxs) &&
AABBInOriginPlane(frustumT, mins, maxs);
}
bool CCamera::InView(const float3& mins, const float3& maxs) const
{
// Axis-aligned bounding box test (AABB)
if (!AABBInOriginPlane(rgtFrustumSideDir, pos, mins, maxs)) return false;
if (!AABBInOriginPlane(lftFrustumSideDir, pos, mins, maxs)) return false;
if (!AABBInOriginPlane(botFrustumSideDir, pos, mins, maxs)) return false;
if (!AABBInOriginPlane(topFrustumSideDir, pos, mins, maxs)) return false;
return true;
}
bool CCamera::InView(const float3& mins, const float3& maxs)
{
// Axis-aligned bounding box test (AABB)
if (AABBInOriginPlane(rightside, pos, mins, maxs) &&
AABBInOriginPlane(leftside, pos, mins, maxs) &&
AABBInOriginPlane(bottom, pos, mins, maxs) &&
AABBInOriginPlane(top, pos, mins, maxs)) {
return true;
}
return false;
}
