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fgdata/Nasal/hdr.nas

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HDR: Add separate fog layer to atmosphere Also use Nasal to feed the shaders' uniforms. Much better than running the computations on the GPU.
2023-04-21 00:15:42 +00:00
# Copyright (C) 2023 Fernando García Liñán
# SPDX-License-Identifier: GPL-2.0-or-later
#-------------------------------------------------------------------------------
# Utilities for the HDR Pipeline
#
# Shaders usually need to be fed uniforms that are either too expensive to
# compute on the GPU or can be precomputed once per frame. In this file we
# transform values from already existing properties into data that can be used
# by the shaders directly.
#-------------------------------------------------------------------------------
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
################################################################################
# Atmosphere
################################################################################
HDR: Add separate fog layer to atmosphere Also use Nasal to feed the shaders' uniforms. Much better than running the computations on the GPU.
2023-04-21 00:15:42 +00:00
setprop("/sim/rendering/hdr/atmos/aerosol-absorption-cross-section[0]", 2.8722e-24);
setprop("/sim/rendering/hdr/atmos/aerosol-absorption-cross-section[1]", 4.6168e-24);
setprop("/sim/rendering/hdr/atmos/aerosol-absorption-cross-section[2]", 7.9706e-24);
setprop("/sim/rendering/hdr/atmos/aerosol-absorption-cross-section[3]", 1.3578e-23);
setprop("/sim/rendering/hdr/atmos/aerosol-scattering-cross-section[0]", 1.5908e-22);
setprop("/sim/rendering/hdr/atmos/aerosol-scattering-cross-section[1]", 1.7711e-22);
setprop("/sim/rendering/hdr/atmos/aerosol-scattering-cross-section[2]", 2.0942e-22);
setprop("/sim/rendering/hdr/atmos/aerosol-scattering-cross-section[3]", 2.4033e-22);
setprop("/sim/rendering/hdr/atmos/aerosol-base-density", 1.3681e17);
setprop("/sim/rendering/hdr/atmos/aerosol-relative-background-density", 1.4619e-17);
setprop("/sim/rendering/hdr/atmos/aerosol-scale-height", 0.73);
setprop("/sim/rendering/hdr/atmos/fog-density", 0.0);
setprop("/sim/rendering/hdr/atmos/fog-scale-height", 1.0);
setprop("/sim/rendering/hdr/atmos/ozone-mean-dobson", 347.0);
setprop("/sim/rendering/hdr/atmos/ground-albedo[0]", 0.4);
setprop("/sim/rendering/hdr/atmos/ground-albedo[1]", 0.4);
setprop("/sim/rendering/hdr/atmos/ground-albedo[2]", 0.4);
setprop("/sim/rendering/hdr/atmos/ground-albedo[3]", 0.4);
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
################################################################################
# Environment map
################################################################################
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
var envmap_frame_listener = nil;
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
var is_envmap_updating = false;
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
var is_prefiltering_active = false;
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
var current_envmap_face = 0;
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
var envmap_update_frame = 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);
is_prefiltering_active = false;
is_envmap_updating = false;
return;
}
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
if (current_envmap_face < 6) {
# Render the current face
setprop("/sim/rendering/hdr/envmap/should-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);
}
if (current_envmap_face < 6) {
# Go to next face and update it next frame
current_envmap_face += 1;
} else {
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
# We have finished updating all faces. Reset the face counter and
# prefilter the envmap.
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
current_envmap_face = 0;
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
is_prefiltering_active = true;
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
setprop("/sim/rendering/hdr/envmap/should-prefilter", true);
}
}
var update_envmap = func {
if (!is_envmap_updating) {
is_envmap_updating = true;
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
# 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);
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
}
}
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
# Manual update
setlistener("/sim/rendering/hdr/envmap/force-update", func(p) {
if (p.getValue()) {
update_envmap();
p.setValue(false);
}
}, 0, 0);
# Automatically update the envmap every so often
var envmap_timer = maketimer(getprop("/sim/rendering/hdr/envmap/update-rate-s"),
update_envmap);
envmap_timer.simulatedTime = true;
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
# Start updating when the FDM is initialized
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
setlistener("/sim/signals/fdm-initialized", func {
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
update_envmap();
envmap_timer.start();
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
# Do a single update after 5 seconds when most of the scenery is loaded
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
settimer(update_envmap, 5);
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
});
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
setlistener("/sim/rendering/hdr/envmap/update-rate-s", func(p) {
if (envmap_timer.isRunning) {
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
update_envmap();
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
envmap_timer.restart(p.getValue());
HDR: Improved environment mapping - Terrain and clouds and now rendered on the envmap, with correct aerial perspective. - Each face is rendered on a separate frame to help with performance. - All faces are updated every 1.5 minutes. This can be changed through a property.
2023-05-02 23:57:20 +00:00
}
HDR: More robust envmap updating - Use the frame signal instead of settimer() with interval 0 to get more consistent behaviour. - Update the envmap more often when time warp is active. - Use maketimer() instead of settimer().
2023-05-04 03:53:49 +00:00
});
# Update the envmap much faster when time warp is active
var envmap_timer_warp = maketimer(1, update_envmap);
setlistener("/sim/time/warp-delta", func(p) {
if (p.getValue() != 0) {
envmap_timer_warp.start();
} else {
envmap_timer_warp.stop();
# Do a final update a second later to make sure we have the correct
# envmap for the new time of day.
settimer(update_envmap, 1);
}
});
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