VPP Camera FOV fallback 與例外決策 Diagram

Current H/V FOV 來源

• input：Channel → Placement → default；sensor / resolution 缺值回 default
• fixed：scalar spec > pinhole；varifocal 無完整 wide/tele spec pair → theoretical H/V
• 有 pair：z=(clamp(f)−fMin)/max(range,ε)，w=(1−z)⁹，result=theoretical+Δwide·w+Δtele·(1−w)

Shape mode 與 ground projection

• 一般模式：非 fisheye／panoramic 且 tilt>0、height>0 → ground projection → trapezoid
• fisheye：H=V=180，tilt 90° 可成 360° circle；panoramic 或 tilt≤0／height≤0 → wedge
• projection 內：tilt≥89.9° → near/far=±h·tan(V/2)；edge angle≤0 只令該 ray=1000 m，不改 shape mode

DORI／PPM policy

• thermal 不另選 FOV；DORI=280/150/80/30 PPM，fixed outer=80，varifocal/thermal outer=30
• H-FOV≥170° 僅令 physical width=π·slantDistance，不是 shape gate
• 以上是 Portal Current policy，不是 IVSD Server native contract