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HDR: Force an envmap update when the view changes

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This commit is contained in:
Fernando García Liñán 2023-10-05 05:56:51 +02:00
parent e12afa0a7d
commit 6cb051369b
1 changed files with 74 additions and 16 deletions
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86
Nasal/hdr.nas
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@ -38,30 +38,64 @@ setprop("/sim/rendering/hdr/atmos/ground-albedo[3]", 0.4);
################################################################################
# Environment map
################################################################################
var envmap_frame_listener = nil;
var is_envmap_updating = false;
var is_prefiltering_active = false;
var current_envmap_face = 0;
var envmap_update_frame = func {
var all_faces_active = false;
var envmap_set_render_face = func(face, active) {
setprop("/sim/rendering/hdr/envmap/should-render-face-" ~ face, active);
}
var envmap_set_render_all_faces = func(active) {
for (var i = 0; i < 6; i += 1) {
envmap_set_render_face(i, active);
}
}
var envmap_set_prefilter = func(active) {
setprop("/sim/rendering/hdr/envmap/should-prefilter", active);
}
# Update all the faces of the environment cubemap in a single frame
var envmap_update_all_faces_callback = func {
if (all_faces_active) {
if (envmap_frame_listener != nil)
removelistener(envmap_frame_listener);
envmap_set_render_all_faces(false);
envmap_set_prefilter(false);
is_envmap_updating = false;
all_faces_active = false;
} else {
envmap_set_render_all_faces(true);
envmap_set_prefilter(true);
all_faces_active = true;
}
}
# Update a single cubemap face each frame. The prefiltering step is also done
# in a separate step, totalling 7 frames to update the entire environment map.
var envmap_update_frame_callback = func {
if (is_prefiltering_active) {
# Last frame we activated the prefiltering, which is the last step.
# Now disable it and reset all variables for the next update cycle.
removelistener(envmap_frame_listener);
setprop("/sim/rendering/hdr/envmap/should-prefilter", false);
envmap_set_prefilter(false);
is_prefiltering_active = false;
is_envmap_updating = false;
return;
}
if (current_envmap_face < 6) {
# Render the current face
setprop("/sim/rendering/hdr/envmap/should-render-face-"
~ current_envmap_face, true);
envmap_set_render_face(current_envmap_face, true);
}
if (current_envmap_face > 0) {
# Stop rendering the previous face
setprop("/sim/rendering/hdr/envmap/should-render-face-"
~ (current_envmap_face - 1), false);
envmap_set_render_face(current_envmap_face - 1, false);
}
if (current_envmap_face < 6) {
# Go to next face and update it next frame
@ -71,25 +105,38 @@ var envmap_update_frame = func {
# prefilter the envmap.
current_envmap_face = 0;
is_prefiltering_active = true;
setprop("/sim/rendering/hdr/envmap/should-prefilter", true);
envmap_set_prefilter(true);
}
}
var update_envmap = func {
if (!is_envmap_updating) {
var update_envmap = func(instant = false) {
if (is_envmap_updating) {
# We are currently updating the envmap, so cancel and start over
if (envmap_frame_listener != nil)
removelistener(envmap_frame_listener);
is_prefiltering_active = false;
all_faces_active = false;
current_envmap_face = 0;
envmap_set_render_all_faces(false);
envmap_set_prefilter(false);
} else {
is_envmap_updating = true;
}
var callback = instant ? envmap_update_all_faces_callback
: envmap_update_frame_callback;
# We use a listener to the frame signal because it is guaranteed to be
# fired at a defined moment, while a settimer() with interval 0 might
# not if subsystems are re-ordered.
envmap_frame_listener = setlistener("/sim/signals/frame",
envmap_update_frame);
}
envmap_frame_listener = setlistener("/sim/signals/frame", callback);
}
# Manual update
setlistener("/sim/rendering/hdr/envmap/force-update", func(p) {
if (p.getValue()) {
update_envmap();
update_envmap(true);
p.setValue(false);
}
}, 0, 0);
@ -107,6 +154,8 @@ setlistener("/sim/signals/fdm-initialized", func {
settimer(update_envmap, 5);
});
# If the update rate is modified at runtime, force an envmap update and restart
# the timer with the new period.
setlistener("/sim/rendering/hdr/envmap/update-rate-s", func(p) {
if (envmap_timer.isRunning) {
update_envmap();
@ -115,7 +164,11 @@ setlistener("/sim/rendering/hdr/envmap/update-rate-s", func(p) {
});
# Update the envmap much faster when time warp is active
var envmap_timer_warp = maketimer(1, update_envmap);
var envmap_timer_warp = maketimer(1, func() {
update_envmap(true);
});
envmap_timer_warp.simulatedTime = true;
setlistener("/sim/time/warp-delta", func(p) {
if (p.getValue() != 0) {
envmap_timer_warp.start();
@ -126,3 +179,8 @@ setlistener("/sim/time/warp-delta", func(p) {
settimer(update_envmap, 1);
}
});
# Update the envmap when the view changes
setlistener("/sim/current-view/view-number", func {
update_envmap(true);
}, 0, 0);