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fix(render3d): lakes clipped to their ellipse; r3d_fog_base

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A water body other than the reflecting one drew its whole bounding rectangle,
so the corners outside the lake's carved ellipse showed water over dry ground;
those bodies now discard outside the ellipse. r3d_fog_base (default 0) is the
height the height fog is measured from, so maps sharing one datum at different
heights get the same air.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-13 00:29:37 +03:00
parent 7a0c03dd21
commit 3e76785b40
6 changed files with 26 additions and 1 deletions
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2
packages/ludic.render3d/render.ludic
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@ -8,6 +8,7 @@
var r3d_sky_prog: int = 0
var r3d_fog_density: int = 0
var r3d_fog_falloff: int = 0
var r3d_fog_base: int = 0 # the height fog is measured from (float bits); 0 = y = 0
var r3d_time: int = 0
var r3d_ready: bool = false
# set before r3d_init to build the landscape from a real height map
@ -30,6 +31,7 @@ function fog_bind(prog: int) -> void {
u_f(gl_uniform(prog, "u_spec_scale"), F_ONE)
u_f(gl_uniform(prog, "u_fog_density"), r3d_fog_density)
u_f(gl_uniform(prog, "u_fog_height_falloff"), r3d_fog_falloff)
u_f(gl_uniform(prog, "u_fog_base"), r3d_fog_base)
var cs = r3d_cloud_shadow
if Os.has_env("R3D_NOCLOUD") { cs = F_ZERO }
u_f(gl_uniform(prog, "u_cloud_shadow"), cs)