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function out=_compute_data_bounds(ax,_entity,logflags)
global _SHADED_ENTITIES
if argn(2)<3
logflags=ax.log_flags;
end
out=list();
old_db=ax.user_data.data_bounds;
if size(ax.children)==0
db=[0 1 0 1 0 1 0 1]';
else
db=%inf*[1 -1 1 -1 1 -1 1 -1]';
for i=1:size(ax.children,1)
h=ax.children(i);
while h.type=="Compound" & type(h.user_data)==1
h=h.children;
end
for j=1:size(h,1)
if typeof(h(j).user_data)=="leafData"
hdb=h(j).user_data.data_bounds;
db=[min(hdb(1),db(1))
max(hdb(2),db(2))
min(hdb(3),db(3))
max(hdb(4),db(4))
min(hdb(5),db(5))
max(hdb(6),db(6))
min(hdb(7),db(7))
max(hdb(8),db(8))];
end
end
end
for i=1:2:7
_min=db(i);_max=db(i+1);
if (_max-_min)<%eps
if abs(_min)<%eps
_min=-1; _max=1;
elseif _min<0
_max=0;
_min=2*_min;
else
_min=0;
_max=_max*2;
end
end
db(i:i+1)=[_min;_max];
end
end
ax.user_data.data_bounds=db;
if (ax.view=='2d' & or([ax.user_data.XLimMode ax.user_data.YLimMode]=='auto')) ...
| (ax.view=='3d' & or([ax.user_data.XLimMode ax.user_data.YLimMode ax.user_data.ZLimMode]=='auto'))
IMD=ax.parent.immediate_drawing;
ax.parent.immediate_drawing='off';
// gory trick to get the pretty values of limits on all axes
old_angles=ax.rotation_angles;
old_log_flags=ax.log_flags;
ax.log_flags='nnn';
ax.rotation_angles=[60,230];
ax.data_bounds=db(1:6);
ax.log_flags=logflags;
ax.tight_limits='off';
xlim=ax.x_ticks.locations([1 $]);
ylim=ax.y_ticks.locations([1 $]);
zlim=ax.z_ticks.locations([1 $]);
ax.user_data.pretty_data_bounds=[xlim' ylim' zlim' db(7:8)'];
ax.rotation_angles=old_angles;
ax.tight_limits='on';
ax.log_flags=old_log_flags;
if ax.user_data.XLimMode=="auto"
ax.user_data.XLim(:)=ax.user_data.pretty_data_bounds(1:2);
end
if ax.user_data.YLimMode=="auto"
ax.user_data.YLim(:)=ax.user_data.pretty_data_bounds(3:4);
end
if ax.user_data.ZLimMode=="auto"
ax.user_data.ZLim(:)=ax.user_data.pretty_data_bounds(5:6);
end
if ax.user_data.CLimMode=="auto"
ax.user_data.CLim(:)=db(7:8);
end
if ax.isoview=='on' & ax.view=="2d"
[ax.user_data.XLim,ax.user_data.XLimMode,ax.user_data.YLim,ax.user_data.YLimMode]=_ratio_one_lims(ax);
end
ax.data_bounds=[ax.user_data.XLim(:) ax.user_data.YLim(:) ax.user_data.ZLim(:)];
ax.parent.immediate_drawing=IMD
end
if ax.user_data.CLimMode=="auto" & or(old_db(7:8)~=db(7:8))
_update_shaded_plots(ax);
elseif or(_entity.user_data.typeOfPlot==_SHADED_ENTITIES)
_update_single_shaded_pl(_entity.handle);
end
endfunction
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