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fix(render3d): a body hidden from the camera still stands in the sun

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Actor.cast_hidden separates drawn from casting. ac_visible rejected a hidden actor from
the shadow pass too, so hiding the player's own body for first person took the player's
shadow with it - and in a sunlit basin your own shadow is what tells you where you are.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-19 21:32:11 +03:00
parent ab6f310013
commit a88aecb993
2 changed files with 16 additions and 1 deletions
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8
changes/a-hidden-body-still-stands-in-the-sun.md Normal file
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@ -0,0 +1,8 @@
bump: patch
type: fix
`Actor.cast_hidden` separates being DRAWN from CASTING. `ac_visible` rejected any hidden
actor from the shadow pass as well as the scene pass, so a game that hides the player's
own body - first person, or a viewfinder held to the eye - lost that player's shadow
entirely. An actor hidden because the camera is inside its head is still standing in the
sun; set this on it and it keeps its shadow. Everything else still stops casting when it
is hidden.

9
packages/ludic.render3d/actor.ludic
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@ -22,6 +22,12 @@ property Actor {
rough: int = 0,
mat: words, # the model matrix
visible: bool = true,
# Drawn and CASTING are not the same question. An actor hidden because the camera is inside
# its head still stands in the sun, and a body that stops casting the moment you look out of
# its own eyes loses its shadow - which in a game played in a sunlit basin is the one thing
# that tells you where you are standing. Set this on anything hidden for a reason the sun
# does not share; everything else keeps stopping its shadow when it is hidden.
cast_hidden: bool = false,
casts: bool = true,
id: int = 0,
cutout: bool = false, # alpha-tested (a flame's cards)
@ -141,7 +147,8 @@ function ac_bind_scene(ap: AcProg) -> void {
fog_bind(p)
}
function ac_visible(a: Actor, shadow: bool) -> bool {
if not a.visible or a.model == null { return false }
if a.model == null { return false }
if not a.visible and not (shadow and a.cast_hidden) { return false }
if shadow and not a.casts { return false }
if a.cull != 0 {
let dx = f_sub(a.x, cam_pos[0]); let dz = f_sub(a.z, cam_pos[2])