From 351114b9997f25ac5b37a8de9adb16d4f963fd0c Mon Sep 17 00:00:00 2001 From: Torsten Dreyer <Torsten@t3r.de> Date: Tue, 28 Sep 2010 08:58:02 +0200 Subject: [PATCH] Fix line endings --- Nasal/view.nas | 1326 ++++++++++++++++++++++++------------------------ 1 file changed, 663 insertions(+), 663 deletions(-) diff --git a/Nasal/view.nas b/Nasal/view.nas index 30b4f25a8..3642ac2e3 100644 --- a/Nasal/view.nas +++ b/Nasal/view.nas @@ -1,663 +1,663 @@ -## -## view.nas -## -## Nasal code for implementing view-specific functionality. - -var index = nil; # current view index -var views = nil; # list of all view branches (/sim/view[n]) as props.Node -var current = nil; # current view branch (e.g. /sim/view[1]) as props.Node - - -var hasmember = func(class, member) { - if (contains(class, member)) - return 1; - if (!contains(class, "parents")) - return 0; - if (typeof(class.parents) != "vector") - return 0; - foreach (var parent; class.parents) - if (hasmember(parent, member)) - return 1; - return 0; -} - - -# Dynamically calculate limits so that it takes STEPS iterations to -# traverse the whole range, the maximum FOV is fixed at 120 degrees, -# and the minimum corresponds to normal maximum human visual acuity -# (~1 arc minute of resolution, although apparently people vary widely -# in this ability). Quick derivation of the math: -# -# mul^steps = max/min -# steps * ln(mul) = ln(max/min) -# mul = exp(ln(max/min) / steps) -var STEPS = 40; -var ACUITY = 1/60; # Maximum angle subtended by one pixel (== 1 arc minute) -var max = var min = var mul = 0; -var calcMul = func { - max = 120; # Fixed at 120 degrees - min = getprop("/sim/startup/xsize") * ACUITY; - mul = math.exp(math.ln(max/min) / STEPS); -} - -## -# Handler. Increase FOV by one step -# -var increase = func { - calcMul(); - var val = fovProp.getValue() * mul; - if(val == max) { return; } - if(val > max) { val = max } - fovProp.setDoubleValue(val); - var popup=getprop("/sim/view-name-popup"); - if(popup == 1 or popup==nil) gui.popupTip(sprintf("FOV: %.1f", val)); -} - -## -# Handler. Decrease FOV by one step -# -var decrease = func { - calcMul(); - var val = fovProp.getValue() / mul; - fovProp.setDoubleValue(val); - var popup=getprop("/sim/view-name-popup"); - if(popup == 1 or popup==nil) gui.popupTip(sprintf("FOV: %.1f%s", val, val < min ? " (overzoom)" : "")); -} - -## -# Handler. Reset FOV to default. -# -var resetFOV = func { - setprop("/sim/current-view/field-of-view", - getprop("/sim/current-view/config/default-field-of-view-deg")); -} - -var resetViewPos = func { - var v = current.getNode("config"); - setprop("/sim/current-view/x-offset-m", v.getNode("x-offset-m", 1).getValue() or 0); - setprop("/sim/current-view/y-offset-m", v.getNode("y-offset-m", 1).getValue() or 0); - setprop("/sim/current-view/z-offset-m", v.getNode("z-offset-m", 1).getValue() or 0); -} - -var resetViewDir = func { - setprop("/sim/current-view/goal-heading-offset-deg", - getprop("/sim/current-view/config/heading-offset-deg")); - setprop("/sim/current-view/goal-pitch-offset-deg", - getprop("/sim/current-view/config/pitch-offset-deg")); - setprop("/sim/current-view/goal-roll-offset-deg", - getprop("/sim/current-view/config/roll-offset-deg")); -} - -## -# Handler. Step to the next (force=1) or next enabled view. -# -var stepView = func(step, force = 0) { - step = step > 0 ? 1 : -1; - var n = index; - for (var i = 0; i < size(views); i += 1) { - n += step; - if (n < 0) - n = size(views) - 1; - elsif (n >= size(views)) - n = 0; - if (force or (var e = views[n].getNode("enabled")) == nil or e.getBoolValue()) - break; - } - setprop("/sim/current-view/view-number", n); - - # And pop up a nice reminder - var popup=getprop("/sim/view-name-popup"); - if(popup == 1 or popup==nil) gui.popupTip(views[n].getNode("name").getValue()); -} - -## -# Get view index by name. -# -var indexof = func(name) { - forindex (var i; views) - if (views[i].getNode("name", 1).getValue() == name) - return i; - return nil; -} - -## -# Standard view "slew" rate, in degrees/sec. -# -var VIEW_PAN_RATE = 60; - -## -# Pans the view horizontally. The argument specifies a relative rate -# (or number of "steps" -- same thing) to the standard rate. -# -var panViewDir = func(step) { - if (getprop("/sim/freeze/master")) - var prop = "/sim/current-view/heading-offset-deg"; - else - var prop = "/sim/current-view/goal-heading-offset-deg"; - - controls.slewProp(prop, step * VIEW_PAN_RATE); -} - -## -# Pans the view vertically. The argument specifies a relative rate -# (or number of "steps" -- same thing) to the standard rate. -# -var panViewPitch = func(step) { - if (getprop("/sim/freeze/master")) - var prop = "/sim/current-view/pitch-offset-deg"; - else - var prop = "/sim/current-view/goal-pitch-offset-deg"; - - controls.slewProp(prop, step * VIEW_PAN_RATE); -} - - -## -# Reset view to default using current view manager (see default_handler). -# -var resetView = func { - manager.reset(); -} - - -## -# Default view handler used by view.manager. -# -var default_handler = { - reset : func { - resetViewDir(); - resetFOV(); - }, -}; - - -## -# View manager. Administrates optional Nasal view handlers. -# Usage: view.manager.register(<view-id>, <view-handler>); -# -# view-id: the view's name (e.g. "Chase View") or index number -# view-handler: a hash with any combination of the functions listed in the -# following example, or none at all. Only define the interface -# functions that you really need! The hash may contain local -# variables and other, non-interface functions. -# -# Example: -# -# var some_view_handler = { -# init : func {}, # called only once at startup -# start : func {}, # called when view is switched to our view -# stop : func {}, # called when view is switched away from our view -# reset : func {}, # called with view.resetView() -# update : func { 0 }, # called iteratively if defined. Must return -# }; # interval in seconds until next invocation -# # Don't define it if you don't need it! -# -# view.manager.register("Some View", some_view_handler); -# -# -var manager = { - current : { node: nil, handler: default_handler }, - init : func { - me.views = {}; - me.loopid = 0; - var viewnodes = props.globals.getNode("sim").getChildren("view"); - forindex (var i; viewnodes) - me.views[i] = { node: viewnodes[i], handler: default_handler }; - setlistener("/sim/current-view/view-number", func(n) { - manager.set_view(n.getValue()); - }, 1); - }, - register : func(which, handler = nil) { - if (num(which) == nil) - which = indexof(which); - if (handler == nil) - handler = default_handler; - me.views[which]["handler"] = handler; - if (hasmember(handler, "init")) - handler.init(me.views[which].node); - me.set_view(); - }, - set_view : func(which = nil) { - if (which == nil) - which = index; - elsif (num(which) == nil) - which = indexof(which); - - me.loopid += 1; - if (hasmember(me.current.handler, "stop")) - me.current.handler.stop(); - - me.current = me.views[which]; - - if (hasmember(me.current.handler, "start")) - me.current.handler.start(); - if (hasmember(me.current.handler, "update")) - me._loop_(me.loopid += 1); - }, - reset : func { - if (hasmember(me.current.handler, "reset")) - me.current.handler.reset(); - else - default_handler.reset(); - }, - _loop_ : func(id) { - id == me.loopid or return; - settimer(func { me._loop_(id) }, me.current.handler.update() or 0); - }, -}; - - -var fly_by_view_handler = { - init : func { - me.latN = props.globals.getNode("/sim/viewer/latitude-deg", 1); - me.lonN = props.globals.getNode("/sim/viewer/longitude-deg", 1); - me.altN = props.globals.getNode("/sim/viewer/altitude-ft", 1); - me.hdgN = props.globals.getNode("/orientation/heading-deg", 1); - - setlistener("/sim/signals/reinit", func(n) { n.getValue() or me.reset() }); - setlistener("/sim/crashed", func(n) { n.getValue() and me.reset() }); - setlistener("/sim/freeze/replay-state", func { - settimer(func { me.reset() }, 1); # time for replay to catch up - }); - me.reset(); - }, - start : func { - me.reset(); - }, - reset: func { - me.chase = -getprop("/sim/chase-distance-m"); - me.course = me.hdgN.getValue(); - me.last = geo.aircraft_position(); - me.setpos(1); - me.dist = 20; - }, - setpos : func(force = 0) { - var pos = geo.aircraft_position(); - - # check if the aircraft has moved enough - var dist = me.last.distance_to(pos); - if (dist < 1.7 * me.chase and !force) - return 1.13; - - # "predict" and remember next aircraft position - var course = me.hdgN.getValue(); - var delta_alt = (pos.alt() - me.last.alt()) * 0.5; - pos.apply_course_distance(course, dist * 0.8); - pos.set_alt(pos.alt() + delta_alt); - me.last.set(pos); - - # apply random deviation - var radius = me.chase * (0.5 * rand() + 0.7); - var agl = getprop("/position/altitude-agl-ft") * FT2M; - if (agl > me.chase) - var angle = rand() * 2 * math.pi; - else - var angle = ((2 * rand() - 1) * 0.15 + 0.5) * (rand() < 0.5 ? -math.pi : math.pi); - - var dev_alt = math.cos(angle) * radius; - var dev_side = math.sin(angle) * radius; - pos.apply_course_distance(course + 90, dev_side); - - # and make sure it's not under ground - var lat = pos.lat(); - var lon = pos.lon(); - var alt = pos.alt(); - var elev = geo.elevation(lat, lon); - if (elev != nil) { - elev += 2; # min elevation - if (alt + dev_alt < elev and dev_alt < 0) - dev_alt = -dev_alt; - if (alt + dev_alt < elev) - alt = elev; - else - alt += dev_alt; - } - - # set new view point - me.latN.setValue(lat); - me.lonN.setValue(lon); - me.altN.setValue(alt * M2FT); - return 7.3; - }, - update : func { - return me.setpos(); - }, -}; - - -var model_view_handler = { - init: func(node) { - me.viewN = node; - me.current = nil; - me.legendN = props.globals.initNode("/sim/current-view/model-view", ""); - me.dialog = props.Node.new({ "dialog-name": "model-view" }); - }, - start: func { - me.listener = setlistener("/sim/signals/multiplayer-updated", func me._update_(), 1); - me.reset(); - fgcommand("dialog-show", me.dialog); - }, - stop: func { - fgcommand("dialog-close", me.dialog); - removelistener(me.listener); - }, - reset: func { - me.select(0); - }, - find: func(callsign) { - forindex (var i; me.list) - if (me.list[i].callsign == callsign) - return i; - return nil; - }, - select: func(which) { - if (num(which) == nil) - which = me.find(which) or 0; # turn callsign into index - - me.setup(me.list[which]); - }, - next: func(step) { - var i = me.find(me.current); - i = i == nil ? 0 : math.mod(i + step, size(me.list)); - me.setup(me.list[i]); - }, - _update_: func { - var self = { callsign: getprop("/sim/multiplay/callsign"), model:, - node: props.globals, root: '/' }; - me.list = [self] ~ multiplayer.model.list; - if (!me.find(me.current)) - me.select(0); - }, - setup: func(data) { - if (data.root == '/') { - var zoffset = getprop("/sim/chase-distance-m"); - var ident = '[' ~ data.callsign ~ ']'; - } else { - var zoffset = 70; - var ident = '"' ~ data.callsign ~ '" (' ~ data.model ~ ')'; - } - - me.current = data.callsign; - me.legendN.setValue(ident); - setprop("/sim/current-view/z-offset-m", zoffset); - - me.viewN.getNode("config").setValues({ - "eye-lat-deg-path": data.root ~ "/position/latitude-deg", - "eye-lon-deg-path": data.root ~ "/position/longitude-deg", - "eye-alt-ft-path": data.root ~ "/position/altitude-ft", - "eye-heading-deg-path": data.root ~ "/orientation/heading-deg", - "target-lat-deg-path": data.root ~ "/position/latitude-deg", - "target-lon-deg-path": data.root ~ "/position/longitude-deg", - "target-alt-ft-path": data.root ~ "/position/altitude-ft", - "target-heading-deg-path": data.root ~ "/orientation/heading-deg", - "target-pitch-deg-path": data.root ~ "/orientation/pitch-deg", - "target-roll-deg-path": data.root ~ "/orientation/roll-deg", - }); - }, -}; - - -var pilot_view_limiter = { - new : func { - return { parents: [pilot_view_limiter] }; - }, - init : func { - me.hdgN = props.globals.getNode("/sim/current-view/heading-offset-deg"); - me.xoffsetN = props.globals.getNode("/sim/current-view/x-offset-m"); - me.xoffset_lowpass = aircraft.lowpass.new(0.1); - me.last_offset = 0; - }, - start : func { - var limits = current.getNode("config/limits", 1); - me.left = { - heading_max : abs(limits.getNode("left/heading-max-deg", 1).getValue() or 1000), - threshold : abs(limits.getNode("left/x-offset-threshold-deg", 1).getValue() or 0), - xoffset_max : abs(limits.getNode("left/x-offset-max-m", 1).getValue() or 0), - }; - me.right = { - heading_max : -abs(limits.getNode("right/heading-max-deg", 1).getValue() or 1000), - threshold : -abs(limits.getNode("right/x-offset-threshold-deg", 1).getValue() or 0), - xoffset_max : -abs(limits.getNode("right/x-offset-max-m", 1).getValue() or 0), - }; - me.left.scale = me.left.xoffset_max / (me.left.heading_max - me.left.threshold); - me.right.scale = me.right.xoffset_max / (me.right.heading_max - me.right.threshold); - me.last_hdg = normdeg(me.hdgN.getValue()); - me.enable_xoffset = me.right.xoffset_max > 0.001 or me.left.xoffset_max > 0.001; - }, - update : func { - if (getprop("/devices/status/keyboard/ctrl")) - return; - - var hdg = normdeg(me.hdgN.getValue()); - if (abs(me.last_hdg - hdg) > 180) # avoid wrap-around skips - me.hdgN.setDoubleValue(hdg = me.last_hdg); - elsif (hdg > me.left.heading_max) - me.hdgN.setDoubleValue(hdg = me.left.heading_max); - elsif (hdg < me.right.heading_max) - me.hdgN.setDoubleValue(hdg = me.right.heading_max); - me.last_hdg = hdg; - - # translate view on X axis to look far right or far left - if (me.enable_xoffset) { - var offset = 0; - if (hdg > me.left.threshold) - offset = (me.left.threshold - hdg) * me.left.scale; - elsif (hdg < me.right.threshold) - offset = (me.right.threshold - hdg) * me.right.scale; - - var new_offset = me.xoffset_lowpass.filter(offset); - me.xoffsetN.setDoubleValue(me.xoffsetN.getValue() - me.last_offset + new_offset); - me.last_offset = new_offset; - } - return 0; - }, -}; - - -var panViewDir = func(step) { # FIXME overrides panViewDir function from above; needs better integration - if (getprop("/sim/freeze/master")) - var prop = "/sim/current-view/heading-offset-deg"; - else - var prop = "/sim/current-view/goal-heading-offset-deg"; - var viewVal = getprop(prop); - var delta = step * VIEW_PAN_RATE * getprop("/sim/time/delta-realtime-sec"); - var viewValSlew = normdeg(viewVal + delta); - var headingMax = abs(current.getNode("config/limits/left/heading-max-deg", 1).getValue() or 1000); - var headingMin = -abs(current.getNode("config/limits/right/heading-max-deg", 1).getValue() or 1000); - if (viewValSlew > headingMax) - viewValSlew = headingMax; - elsif (viewValSlew < headingMin) - viewValSlew = headingMin; - setprop(prop, viewValSlew); -} - - -#------------------------------------------------------------------------------ -# -# Saves/restores/moves the view point (position, orientation, field-of-view). -# Moves are interpolated with sinusoidal characteristic. There's only one -# instance of this class, available as "view.point". -# -# Usage: -# view.point.save(); ... save current view and return reference to -# saved values in the form of a props.Node -# -# view.point.restore(); ... restore saved view parameters -# -# view.point.move(<prop> [, <time>]); -# ... set view parameters from a props.Node with -# optional move time in seconds. <prop> may be -# nil, in which case nothing happens. -# -# A parameter set as expected by set() and returned by save() is a props.Node -# object containing any (or none) of these children: -# -# <heading-offset-deg> -# <pitch-offset-deg> -# <roll-offset-deg> -# <x-offset-m> -# <y-offset-m> -# <z-offset-m> -# <field-of-view> -# <move-time-sec> -# -# The <move-time> isn't really a property of the view, but is available -# for convenience. The time argument in the move() method overrides it. - - -## -# Normalize angle to -180 <= angle < 180 -# -var normdeg = func(a) { - while (a >= 180) - a -= 360; - while (a < -180) - a += 360; - return a; -} - - -## -# Manages one translation/rotation axis. (For simplicity reasons the -# field-of-view parameter is also managed by this class.) -# -var ViewAxis = { - new : func(prop) { - var m = { parents : [ViewAxis] }; - m.prop = props.globals.getNode(prop, 1); - if (m.prop.getType() == "NONE") - m.prop.setDoubleValue(0); - - m.from = m.to = m.prop.getValue(); - return m; - }, - reset : func { - me.from = me.to = normdeg(me.prop.getValue()); - }, - target : func(v) { - me.to = normdeg(v); - }, - move : func(blend) { - me.prop.setValue(me.from + blend * (me.to - me.from)); - }, -}; - - - -## -# view.point: handles smooth view movements -# -var point = { - init : func { - me.axes = { - "heading-offset-deg" : ViewAxis.new("/sim/current-view/goal-heading-offset-deg"), - "pitch-offset-deg" : ViewAxis.new("/sim/current-view/goal-pitch-offset-deg"), - "roll-offset-deg" : ViewAxis.new("/sim/current-view/goal-roll-offset-deg"), - "x-offset-m" : ViewAxis.new("/sim/current-view/x-offset-m"), - "y-offset-m" : ViewAxis.new("/sim/current-view/y-offset-m"), - "z-offset-m" : ViewAxis.new("/sim/current-view/z-offset-m"), - "field-of-view" : ViewAxis.new("/sim/current-view/field-of-view"), - }; - me.storeN = props.Node.new(); - me.dtN = props.globals.getNode("/sim/time/delta-realtime-sec", 1); - me.currviewN = props.globals.getNode("/sim/current-view", 1); - me.blend = 0; - me.loop_id = 0; - props.copy(props.globals.getNode("/sim/view/config"), me.storeN); - }, - save : func { - me.storeN = props.Node.new(); - props.copy(me.currviewN, me.storeN); - return me.storeN; - }, - restore : func { - me.move(me.storeN); - }, - move : func(prop, time = nil) { - prop != nil or return; - foreach (var a; keys(me.axes)) { - var n = prop.getNode(a); - me.axes[a].reset(); - if (n != nil) - me.axes[a].target(n.getValue()); - } - var m = prop.getNode("move-time-sec"); - if (m != nil) - time = m.getValue(); - - if (time == nil) - time = 1; - - me.blend = -1; # range -1 .. 1 - me._loop_(me.loop_id += 1, time); - }, - _loop_ : func(id, time) { - me.loop_id == id or return; - me.blend += me.dtN.getValue() / time; - if (me.blend > 1) - me.blend = 1; - - var b = (math.sin(me.blend * math.pi / 2) + 1) / 2; # range 0 .. 1 - foreach (var a; keys(me.axes)) - me.axes[a].move(b); - - if (me.blend < 1) - settimer(func { me._loop_(id, time) }, 0); - }, -}; - - - -var fovProp = nil; - - -_setlistener("/sim/signals/nasal-dir-initialized", func { - views = props.globals.getNode("/sim").getChildren("view"); - fovProp = props.globals.getNode("/sim/current-view/field-of-view"); - point.init(); - - setlistener("/sim/current-view/view-number", func(n) { - current = views[index = n.getValue()]; - }, 1); - - props.globals.initNode("/position/altitude-agl-ft"); # needed by Fly-By View - manager.init(); - manager.register("Fly-By View", fly_by_view_handler); - manager.register("Model View", model_view_handler); -}); - - -_setlistener("/sim/signals/fdm-initialized", func { - var zoffset = nil; - foreach (var v; views) { - var index = v.getIndex(); - if (index > 7 and index < 100) { - globals["view"] = nil; - die("\n***\n*\n* Illegal use of reserved view index " - ~ index ~ ". Use indices >= 100!\n*\n***"); - } elsif (index >= 100 and index < 200) { - if (v.getNode("name") == nil) - continue; - var e = v.getNode("enabled"); - if (e != nil) { - aircraft.data.add(e); - e.setAttribute("userarchive", 0); - } - } - } - - forindex (var i; views) { - var limits = views[i].getNode("config/limits/enabled"); - if (limits != nil) { - func (i) { - var limiter = pilot_view_limiter.new(); - setlistener(limits, func(n) { - manager.register(i, n.getBoolValue() ? limiter : nil); - manager.set_view(); - }, 1); - }(i); - } - } -}); - - +## +## view.nas +## +## Nasal code for implementing view-specific functionality. + +var index = nil; # current view index +var views = nil; # list of all view branches (/sim/view[n]) as props.Node +var current = nil; # current view branch (e.g. /sim/view[1]) as props.Node + + +var hasmember = func(class, member) { + if (contains(class, member)) + return 1; + if (!contains(class, "parents")) + return 0; + if (typeof(class.parents) != "vector") + return 0; + foreach (var parent; class.parents) + if (hasmember(parent, member)) + return 1; + return 0; +} + + +# Dynamically calculate limits so that it takes STEPS iterations to +# traverse the whole range, the maximum FOV is fixed at 120 degrees, +# and the minimum corresponds to normal maximum human visual acuity +# (~1 arc minute of resolution, although apparently people vary widely +# in this ability). Quick derivation of the math: +# +# mul^steps = max/min +# steps * ln(mul) = ln(max/min) +# mul = exp(ln(max/min) / steps) +var STEPS = 40; +var ACUITY = 1/60; # Maximum angle subtended by one pixel (== 1 arc minute) +var max = var min = var mul = 0; +var calcMul = func { + max = 120; # Fixed at 120 degrees + min = getprop("/sim/startup/xsize") * ACUITY; + mul = math.exp(math.ln(max/min) / STEPS); +} + +## +# Handler. Increase FOV by one step +# +var increase = func { + calcMul(); + var val = fovProp.getValue() * mul; + if(val == max) { return; } + if(val > max) { val = max } + fovProp.setDoubleValue(val); + var popup=getprop("/sim/view-name-popup"); + if(popup == 1 or popup==nil) gui.popupTip(sprintf("FOV: %.1f", val)); +} + +## +# Handler. Decrease FOV by one step +# +var decrease = func { + calcMul(); + var val = fovProp.getValue() / mul; + fovProp.setDoubleValue(val); + var popup=getprop("/sim/view-name-popup"); + if(popup == 1 or popup==nil) gui.popupTip(sprintf("FOV: %.1f%s", val, val < min ? " (overzoom)" : "")); +} + +## +# Handler. Reset FOV to default. +# +var resetFOV = func { + setprop("/sim/current-view/field-of-view", + getprop("/sim/current-view/config/default-field-of-view-deg")); +} + +var resetViewPos = func { + var v = current.getNode("config"); + setprop("/sim/current-view/x-offset-m", v.getNode("x-offset-m", 1).getValue() or 0); + setprop("/sim/current-view/y-offset-m", v.getNode("y-offset-m", 1).getValue() or 0); + setprop("/sim/current-view/z-offset-m", v.getNode("z-offset-m", 1).getValue() or 0); +} + +var resetViewDir = func { + setprop("/sim/current-view/goal-heading-offset-deg", + getprop("/sim/current-view/config/heading-offset-deg")); + setprop("/sim/current-view/goal-pitch-offset-deg", + getprop("/sim/current-view/config/pitch-offset-deg")); + setprop("/sim/current-view/goal-roll-offset-deg", + getprop("/sim/current-view/config/roll-offset-deg")); +} + +## +# Handler. Step to the next (force=1) or next enabled view. +# +var stepView = func(step, force = 0) { + step = step > 0 ? 1 : -1; + var n = index; + for (var i = 0; i < size(views); i += 1) { + n += step; + if (n < 0) + n = size(views) - 1; + elsif (n >= size(views)) + n = 0; + if (force or (var e = views[n].getNode("enabled")) == nil or e.getBoolValue()) + break; + } + setprop("/sim/current-view/view-number", n); + + # And pop up a nice reminder + var popup=getprop("/sim/view-name-popup"); + if(popup == 1 or popup==nil) gui.popupTip(views[n].getNode("name").getValue()); +} + +## +# Get view index by name. +# +var indexof = func(name) { + forindex (var i; views) + if (views[i].getNode("name", 1).getValue() == name) + return i; + return nil; +} + +## +# Standard view "slew" rate, in degrees/sec. +# +var VIEW_PAN_RATE = 60; + +## +# Pans the view horizontally. The argument specifies a relative rate +# (or number of "steps" -- same thing) to the standard rate. +# +var panViewDir = func(step) { + if (getprop("/sim/freeze/master")) + var prop = "/sim/current-view/heading-offset-deg"; + else + var prop = "/sim/current-view/goal-heading-offset-deg"; + + controls.slewProp(prop, step * VIEW_PAN_RATE); +} + +## +# Pans the view vertically. The argument specifies a relative rate +# (or number of "steps" -- same thing) to the standard rate. +# +var panViewPitch = func(step) { + if (getprop("/sim/freeze/master")) + var prop = "/sim/current-view/pitch-offset-deg"; + else + var prop = "/sim/current-view/goal-pitch-offset-deg"; + + controls.slewProp(prop, step * VIEW_PAN_RATE); +} + + +## +# Reset view to default using current view manager (see default_handler). +# +var resetView = func { + manager.reset(); +} + + +## +# Default view handler used by view.manager. +# +var default_handler = { + reset : func { + resetViewDir(); + resetFOV(); + }, +}; + + +## +# View manager. Administrates optional Nasal view handlers. +# Usage: view.manager.register(<view-id>, <view-handler>); +# +# view-id: the view's name (e.g. "Chase View") or index number +# view-handler: a hash with any combination of the functions listed in the +# following example, or none at all. Only define the interface +# functions that you really need! The hash may contain local +# variables and other, non-interface functions. +# +# Example: +# +# var some_view_handler = { +# init : func {}, # called only once at startup +# start : func {}, # called when view is switched to our view +# stop : func {}, # called when view is switched away from our view +# reset : func {}, # called with view.resetView() +# update : func { 0 }, # called iteratively if defined. Must return +# }; # interval in seconds until next invocation +# # Don't define it if you don't need it! +# +# view.manager.register("Some View", some_view_handler); +# +# +var manager = { + current : { node: nil, handler: default_handler }, + init : func { + me.views = {}; + me.loopid = 0; + var viewnodes = props.globals.getNode("sim").getChildren("view"); + forindex (var i; viewnodes) + me.views[i] = { node: viewnodes[i], handler: default_handler }; + setlistener("/sim/current-view/view-number", func(n) { + manager.set_view(n.getValue()); + }, 1); + }, + register : func(which, handler = nil) { + if (num(which) == nil) + which = indexof(which); + if (handler == nil) + handler = default_handler; + me.views[which]["handler"] = handler; + if (hasmember(handler, "init")) + handler.init(me.views[which].node); + me.set_view(); + }, + set_view : func(which = nil) { + if (which == nil) + which = index; + elsif (num(which) == nil) + which = indexof(which); + + me.loopid += 1; + if (hasmember(me.current.handler, "stop")) + me.current.handler.stop(); + + me.current = me.views[which]; + + if (hasmember(me.current.handler, "start")) + me.current.handler.start(); + if (hasmember(me.current.handler, "update")) + me._loop_(me.loopid += 1); + }, + reset : func { + if (hasmember(me.current.handler, "reset")) + me.current.handler.reset(); + else + default_handler.reset(); + }, + _loop_ : func(id) { + id == me.loopid or return; + settimer(func { me._loop_(id) }, me.current.handler.update() or 0); + }, +}; + + +var fly_by_view_handler = { + init : func { + me.latN = props.globals.getNode("/sim/viewer/latitude-deg", 1); + me.lonN = props.globals.getNode("/sim/viewer/longitude-deg", 1); + me.altN = props.globals.getNode("/sim/viewer/altitude-ft", 1); + me.hdgN = props.globals.getNode("/orientation/heading-deg", 1); + + setlistener("/sim/signals/reinit", func(n) { n.getValue() or me.reset() }); + setlistener("/sim/crashed", func(n) { n.getValue() and me.reset() }); + setlistener("/sim/freeze/replay-state", func { + settimer(func { me.reset() }, 1); # time for replay to catch up + }); + me.reset(); + }, + start : func { + me.reset(); + }, + reset: func { + me.chase = -getprop("/sim/chase-distance-m"); + me.course = me.hdgN.getValue(); + me.last = geo.aircraft_position(); + me.setpos(1); + me.dist = 20; + }, + setpos : func(force = 0) { + var pos = geo.aircraft_position(); + + # check if the aircraft has moved enough + var dist = me.last.distance_to(pos); + if (dist < 1.7 * me.chase and !force) + return 1.13; + + # "predict" and remember next aircraft position + var course = me.hdgN.getValue(); + var delta_alt = (pos.alt() - me.last.alt()) * 0.5; + pos.apply_course_distance(course, dist * 0.8); + pos.set_alt(pos.alt() + delta_alt); + me.last.set(pos); + + # apply random deviation + var radius = me.chase * (0.5 * rand() + 0.7); + var agl = getprop("/position/altitude-agl-ft") * FT2M; + if (agl > me.chase) + var angle = rand() * 2 * math.pi; + else + var angle = ((2 * rand() - 1) * 0.15 + 0.5) * (rand() < 0.5 ? -math.pi : math.pi); + + var dev_alt = math.cos(angle) * radius; + var dev_side = math.sin(angle) * radius; + pos.apply_course_distance(course + 90, dev_side); + + # and make sure it's not under ground + var lat = pos.lat(); + var lon = pos.lon(); + var alt = pos.alt(); + var elev = geo.elevation(lat, lon); + if (elev != nil) { + elev += 2; # min elevation + if (alt + dev_alt < elev and dev_alt < 0) + dev_alt = -dev_alt; + if (alt + dev_alt < elev) + alt = elev; + else + alt += dev_alt; + } + + # set new view point + me.latN.setValue(lat); + me.lonN.setValue(lon); + me.altN.setValue(alt * M2FT); + return 7.3; + }, + update : func { + return me.setpos(); + }, +}; + + +var model_view_handler = { + init: func(node) { + me.viewN = node; + me.current = nil; + me.legendN = props.globals.initNode("/sim/current-view/model-view", ""); + me.dialog = props.Node.new({ "dialog-name": "model-view" }); + }, + start: func { + me.listener = setlistener("/sim/signals/multiplayer-updated", func me._update_(), 1); + me.reset(); + fgcommand("dialog-show", me.dialog); + }, + stop: func { + fgcommand("dialog-close", me.dialog); + removelistener(me.listener); + }, + reset: func { + me.select(0); + }, + find: func(callsign) { + forindex (var i; me.list) + if (me.list[i].callsign == callsign) + return i; + return nil; + }, + select: func(which) { + if (num(which) == nil) + which = me.find(which) or 0; # turn callsign into index + + me.setup(me.list[which]); + }, + next: func(step) { + var i = me.find(me.current); + i = i == nil ? 0 : math.mod(i + step, size(me.list)); + me.setup(me.list[i]); + }, + _update_: func { + var self = { callsign: getprop("/sim/multiplay/callsign"), model:, + node: props.globals, root: '/' }; + me.list = [self] ~ multiplayer.model.list; + if (!me.find(me.current)) + me.select(0); + }, + setup: func(data) { + if (data.root == '/') { + var zoffset = getprop("/sim/chase-distance-m"); + var ident = '[' ~ data.callsign ~ ']'; + } else { + var zoffset = 70; + var ident = '"' ~ data.callsign ~ '" (' ~ data.model ~ ')'; + } + + me.current = data.callsign; + me.legendN.setValue(ident); + setprop("/sim/current-view/z-offset-m", zoffset); + + me.viewN.getNode("config").setValues({ + "eye-lat-deg-path": data.root ~ "/position/latitude-deg", + "eye-lon-deg-path": data.root ~ "/position/longitude-deg", + "eye-alt-ft-path": data.root ~ "/position/altitude-ft", + "eye-heading-deg-path": data.root ~ "/orientation/heading-deg", + "target-lat-deg-path": data.root ~ "/position/latitude-deg", + "target-lon-deg-path": data.root ~ "/position/longitude-deg", + "target-alt-ft-path": data.root ~ "/position/altitude-ft", + "target-heading-deg-path": data.root ~ "/orientation/heading-deg", + "target-pitch-deg-path": data.root ~ "/orientation/pitch-deg", + "target-roll-deg-path": data.root ~ "/orientation/roll-deg", + }); + }, +}; + + +var pilot_view_limiter = { + new : func { + return { parents: [pilot_view_limiter] }; + }, + init : func { + me.hdgN = props.globals.getNode("/sim/current-view/heading-offset-deg"); + me.xoffsetN = props.globals.getNode("/sim/current-view/x-offset-m"); + me.xoffset_lowpass = aircraft.lowpass.new(0.1); + me.last_offset = 0; + }, + start : func { + var limits = current.getNode("config/limits", 1); + me.left = { + heading_max : abs(limits.getNode("left/heading-max-deg", 1).getValue() or 1000), + threshold : abs(limits.getNode("left/x-offset-threshold-deg", 1).getValue() or 0), + xoffset_max : abs(limits.getNode("left/x-offset-max-m", 1).getValue() or 0), + }; + me.right = { + heading_max : -abs(limits.getNode("right/heading-max-deg", 1).getValue() or 1000), + threshold : -abs(limits.getNode("right/x-offset-threshold-deg", 1).getValue() or 0), + xoffset_max : -abs(limits.getNode("right/x-offset-max-m", 1).getValue() or 0), + }; + me.left.scale = me.left.xoffset_max / (me.left.heading_max - me.left.threshold); + me.right.scale = me.right.xoffset_max / (me.right.heading_max - me.right.threshold); + me.last_hdg = normdeg(me.hdgN.getValue()); + me.enable_xoffset = me.right.xoffset_max > 0.001 or me.left.xoffset_max > 0.001; + }, + update : func { + if (getprop("/devices/status/keyboard/ctrl")) + return; + + var hdg = normdeg(me.hdgN.getValue()); + if (abs(me.last_hdg - hdg) > 180) # avoid wrap-around skips + me.hdgN.setDoubleValue(hdg = me.last_hdg); + elsif (hdg > me.left.heading_max) + me.hdgN.setDoubleValue(hdg = me.left.heading_max); + elsif (hdg < me.right.heading_max) + me.hdgN.setDoubleValue(hdg = me.right.heading_max); + me.last_hdg = hdg; + + # translate view on X axis to look far right or far left + if (me.enable_xoffset) { + var offset = 0; + if (hdg > me.left.threshold) + offset = (me.left.threshold - hdg) * me.left.scale; + elsif (hdg < me.right.threshold) + offset = (me.right.threshold - hdg) * me.right.scale; + + var new_offset = me.xoffset_lowpass.filter(offset); + me.xoffsetN.setDoubleValue(me.xoffsetN.getValue() - me.last_offset + new_offset); + me.last_offset = new_offset; + } + return 0; + }, +}; + + +var panViewDir = func(step) { # FIXME overrides panViewDir function from above; needs better integration + if (getprop("/sim/freeze/master")) + var prop = "/sim/current-view/heading-offset-deg"; + else + var prop = "/sim/current-view/goal-heading-offset-deg"; + var viewVal = getprop(prop); + var delta = step * VIEW_PAN_RATE * getprop("/sim/time/delta-realtime-sec"); + var viewValSlew = normdeg(viewVal + delta); + var headingMax = abs(current.getNode("config/limits/left/heading-max-deg", 1).getValue() or 1000); + var headingMin = -abs(current.getNode("config/limits/right/heading-max-deg", 1).getValue() or 1000); + if (viewValSlew > headingMax) + viewValSlew = headingMax; + elsif (viewValSlew < headingMin) + viewValSlew = headingMin; + setprop(prop, viewValSlew); +} + + +#------------------------------------------------------------------------------ +# +# Saves/restores/moves the view point (position, orientation, field-of-view). +# Moves are interpolated with sinusoidal characteristic. There's only one +# instance of this class, available as "view.point". +# +# Usage: +# view.point.save(); ... save current view and return reference to +# saved values in the form of a props.Node +# +# view.point.restore(); ... restore saved view parameters +# +# view.point.move(<prop> [, <time>]); +# ... set view parameters from a props.Node with +# optional move time in seconds. <prop> may be +# nil, in which case nothing happens. +# +# A parameter set as expected by set() and returned by save() is a props.Node +# object containing any (or none) of these children: +# +# <heading-offset-deg> +# <pitch-offset-deg> +# <roll-offset-deg> +# <x-offset-m> +# <y-offset-m> +# <z-offset-m> +# <field-of-view> +# <move-time-sec> +# +# The <move-time> isn't really a property of the view, but is available +# for convenience. The time argument in the move() method overrides it. + + +## +# Normalize angle to -180 <= angle < 180 +# +var normdeg = func(a) { + while (a >= 180) + a -= 360; + while (a < -180) + a += 360; + return a; +} + + +## +# Manages one translation/rotation axis. (For simplicity reasons the +# field-of-view parameter is also managed by this class.) +# +var ViewAxis = { + new : func(prop) { + var m = { parents : [ViewAxis] }; + m.prop = props.globals.getNode(prop, 1); + if (m.prop.getType() == "NONE") + m.prop.setDoubleValue(0); + + m.from = m.to = m.prop.getValue(); + return m; + }, + reset : func { + me.from = me.to = normdeg(me.prop.getValue()); + }, + target : func(v) { + me.to = normdeg(v); + }, + move : func(blend) { + me.prop.setValue(me.from + blend * (me.to - me.from)); + }, +}; + + + +## +# view.point: handles smooth view movements +# +var point = { + init : func { + me.axes = { + "heading-offset-deg" : ViewAxis.new("/sim/current-view/goal-heading-offset-deg"), + "pitch-offset-deg" : ViewAxis.new("/sim/current-view/goal-pitch-offset-deg"), + "roll-offset-deg" : ViewAxis.new("/sim/current-view/goal-roll-offset-deg"), + "x-offset-m" : ViewAxis.new("/sim/current-view/x-offset-m"), + "y-offset-m" : ViewAxis.new("/sim/current-view/y-offset-m"), + "z-offset-m" : ViewAxis.new("/sim/current-view/z-offset-m"), + "field-of-view" : ViewAxis.new("/sim/current-view/field-of-view"), + }; + me.storeN = props.Node.new(); + me.dtN = props.globals.getNode("/sim/time/delta-realtime-sec", 1); + me.currviewN = props.globals.getNode("/sim/current-view", 1); + me.blend = 0; + me.loop_id = 0; + props.copy(props.globals.getNode("/sim/view/config"), me.storeN); + }, + save : func { + me.storeN = props.Node.new(); + props.copy(me.currviewN, me.storeN); + return me.storeN; + }, + restore : func { + me.move(me.storeN); + }, + move : func(prop, time = nil) { + prop != nil or return; + foreach (var a; keys(me.axes)) { + var n = prop.getNode(a); + me.axes[a].reset(); + if (n != nil) + me.axes[a].target(n.getValue()); + } + var m = prop.getNode("move-time-sec"); + if (m != nil) + time = m.getValue(); + + if (time == nil) + time = 1; + + me.blend = -1; # range -1 .. 1 + me._loop_(me.loop_id += 1, time); + }, + _loop_ : func(id, time) { + me.loop_id == id or return; + me.blend += me.dtN.getValue() / time; + if (me.blend > 1) + me.blend = 1; + + var b = (math.sin(me.blend * math.pi / 2) + 1) / 2; # range 0 .. 1 + foreach (var a; keys(me.axes)) + me.axes[a].move(b); + + if (me.blend < 1) + settimer(func { me._loop_(id, time) }, 0); + }, +}; + + + +var fovProp = nil; + + +_setlistener("/sim/signals/nasal-dir-initialized", func { + views = props.globals.getNode("/sim").getChildren("view"); + fovProp = props.globals.getNode("/sim/current-view/field-of-view"); + point.init(); + + setlistener("/sim/current-view/view-number", func(n) { + current = views[index = n.getValue()]; + }, 1); + + props.globals.initNode("/position/altitude-agl-ft"); # needed by Fly-By View + manager.init(); + manager.register("Fly-By View", fly_by_view_handler); + manager.register("Model View", model_view_handler); +}); + + +_setlistener("/sim/signals/fdm-initialized", func { + var zoffset = nil; + foreach (var v; views) { + var index = v.getIndex(); + if (index > 7 and index < 100) { + globals["view"] = nil; + die("\n***\n*\n* Illegal use of reserved view index " + ~ index ~ ". Use indices >= 100!\n*\n***"); + } elsif (index >= 100 and index < 200) { + if (v.getNode("name") == nil) + continue; + var e = v.getNode("enabled"); + if (e != nil) { + aircraft.data.add(e); + e.setAttribute("userarchive", 0); + } + } + } + + forindex (var i; views) { + var limits = views[i].getNode("config/limits/enabled"); + if (limits != nil) { + func (i) { + var limiter = pilot_view_limiter.new(); + setlistener(limits, func(n) { + manager.register(i, n.getBoolValue() ? limiter : nil); + manager.set_view(); + }, 1); + }(i); + } + } +}); + +