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davidB21 + Vivian MEAZZA + /me: pilot view limiter

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If a <view> contains a <limits> block, then a view handler gets attached to
it, which limits head turns to a given range, whereby headings beyond a given
threshold cause an additional sideways movement. This is turned off by default
for now.
This commit is contained in:
mfranz 2008-04-14 10:00:27 +00:00
parent 5fdf9e3831
commit 656340fa3d
2 changed files with 86 additions and 3 deletions
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81
Nasal/view.nas
View file

@ -192,7 +192,7 @@ var manager = {
},
register : func(which, handler = nil) {
if (num(which) == nil)
which = view.indexof(which);
which = indexof(which);
if (handler == nil)
handler = default_handler;
me.views[which]["handler"] = handler;
@ -204,7 +204,7 @@ var manager = {
if (which == nil)
which = index;
elsif (num(which) == nil)
which = view.indexof(which);
which = indexof(which);
me.loopid += 1;
if (contains(me.current.handler, "stop"))
@ -303,7 +303,7 @@ var fly_by_view_handler = {
me.latN.setValue(lat);
me.lonN.setValue(lon);
me.altN.setValue(alt * geo.M2FT);
return 9.3;
return 8.3;
},
update : func {
return me.setpos();
@ -311,6 +311,69 @@ var fly_by_view_handler = {
};
var 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.old_offset = 0;
},
start : func {
var limits = current.getNode("config/limits", 1);
me.heading_min = limits.getNode("heading-min-deg", 1).getValue();
me.heading_max = limits.getNode("heading-max-deg", 1).getValue();
me.max_xoffset = limits.getNode("x-offset-max-m", 1).getValue() or 0;
me.threshold_min = limits.getNode("x-offset-heading-min-deg", 1).getValue() or 0;
me.threshold_max = limits.getNode("x-offset-heading-max-deg", 1).getValue() or 0;
if (me.heading_max == nil)
me.heading_max = 1000;
if (me.heading_min == nil)
me.heading_min = -1000;
},
update : func {
var hdg = normdeg(me.hdgN.getValue());
if (hdg > me.heading_max)
me.hdgN.setDoubleValue(hdg = me.heading_max);
elsif (hdg < me.heading_min)
me.hdgN.setDoubleValue(hdg = me.heading_min);
# translate view on X axis to look far right or far left
if (me.max_xoffset) {
var norm = 0;
if (hdg <= me.threshold_min)
norm = (hdg - me.threshold_min) / (me.heading_min - me.threshold_min);
elsif (hdg >= me.threshold_max)
norm = -(hdg - me.threshold_max) / (me.heading_max - me.threshold_max);
var new_offset = me.xoffset_lowpass.filter(norm * me.max_xoffset);
me.xoffsetN.setDoubleValue(me.xoffsetN.getValue() - me.old_offset + new_offset);
me.old_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 = current.getNode("config/limits/heading-max-deg", 1).getValue() or 1000;
var headingMin = current.getNode("config/limits/heading-min-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).
@ -485,6 +548,18 @@ _setlistener("/sim/signals/fdm-initialized", func {
manager.init();
manager.register("Fly-By View", fly_by_view_handler);
forindex (var i; views) {
var limits = views[i].getNode("config/limits/enabled");
if (limits != nil) {
func (index) {
setlistener(limits, func(n) {
manager.register(index, n.getValue() ? pilot_view_limiter : nil);
manager.set_view();
}, 1);
}(i);
}
}
});

8
preferences.xml
View file

@ -282,6 +282,14 @@ Started September 2000 by David Megginson, david@megginson.com
<right-direction-deg type="double">270</right-direction-deg>
<front-right-direction-deg type="double">315</front-right-direction-deg>
<dynamic-view type="bool">true</dynamic-view>
<limits>
<enabled type="bool">false</enabled>
<heading-min-deg type="double">-140</heading-min-deg>
<heading-max-deg type="double">140</heading-max-deg>
<x-offset-max-m type="double">0.15</x-offset-max-m>
<x-offset-heading-min-deg type="double">-65</x-offset-heading-min-deg>
<x-offset-heading-max-deg type="double">65</x-offset-heading-max-deg>
</limits>
</config>
</view>