--- /dev/null
+function nrbplot (nurbs, subd, varargin)
+%
+% NRBPLOT: Plot a NURBS curve or surface, or the boundary of a NURBS volume.
+%
+% Calling Sequence:
+%
+% nrbplot (nrb, subd)
+% nrbplot (nrb, subd, p, v)
+%
+% INPUT:
+%
+% nrb : NURBS curve, surface or volume, see nrbmak.
+%
+% npnts : Number of evaluation points, for a surface or volume, a row
+% vector with the number of points along each direction.
+%
+% [p,v] : property/value options
+%
+% Valid property/value pairs include:
+%
+% Property Value/{Default}
+% -----------------------------------
+% light {off} | on
+% colormap {'copper'}
+%
+% Example:
+%
+% Plot the test surface with 20 points along the U direction
+% and 30 along the V direction
+%
+% nrbplot(nrbtestsrf, [20 30])
+%
+% Copyright (C) 2000 Mark Spink
+% Copyright (C) 2010 Carlo de Falco, Rafael Vazquez
+%
+% This program is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 2 of the License, or
+% (at your option) any later version.
+
+% This program is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+nargs = nargin;
+if nargs < 2
+ error ('Need a NURBS to plot and the number of subdivisions!');
+elseif rem(nargs+2,2)
+ error ('Param value pairs expected')
+end
+
+% Default values
+light='off';
+cmap='summer';
+
+% Recover Param/Value pairs from argument list
+for i=1:2:nargs-2
+ Param = varargin{i};
+ Value = varargin{i+1};
+ if (~ischar (Param))
+ error ('Parameter must be a string')
+ elseif size(Param,1)~=1
+ error ('Parameter must be a non-empty single row string.')
+ end
+ switch lower (Param)
+ case 'light'
+ light = lower (Value);
+ if (~ischar (light))
+ error ('light must be a string.')
+ elseif ~(strcmp(light,'off') | strcmp(light,'on'))
+ error ('light must be off | on')
+ end
+ case 'colormap'
+ if ischar (Value)
+ cmap = lower(Value);
+ elseif size (Value, 2) ~= 3
+ error ('colormap must be a string or have exactly three columns.')
+ else
+ cmap=Value;
+ end
+ otherwise
+ error ('Unknown parameter: %s', Param)
+ end
+end
+
+colormap (cmap);
+
+% convert the number of subdivisions in number of points
+subd = subd+1;
+
+% plot the curve or surface
+if (iscell (nurbs.knots))
+ if (size (nurbs.knots,2) == 2) % plot a NURBS surface
+ p = nrbeval (nurbs, {linspace(0.0,1.0,subd(1)) linspace(0.0,1.0,subd(2))});
+ if (strcmp (light,'on'))
+ % light surface
+ surfl (squeeze(p(1,:,:)), squeeze(p(2,:,:)), squeeze(p(3,:,:)));
+ shading interp;
+ else
+ surf (squeeze (p(1,:,:)), squeeze (p(2,:,:)), squeeze (p(3,:,:)));
+ shading faceted;
+ end
+ elseif (size (nurbs.knots,2) == 3) % plot the boundaries of a NURBS volume
+ hold_flag = ishold;
+ px = nrbeval (nurbs, {[0 1] linspace(0.0,1.0,subd(2)) linspace(0.0,1.0,subd(3))});
+ py = nrbeval (nurbs, {linspace(0.0,1.0,subd(1)) [0 1] linspace(0.0,1.0,subd(3))});
+ pz = nrbeval (nurbs, {linspace(0.0,1.0,subd(1)) linspace(0.0,1.0,subd(2)) [0 1]});
+ if (strcmp (light, 'on'))
+ surfl (squeeze (pz(1,:,:,1)), squeeze (pz(2,:,:,1)), squeeze (pz(3,:,:,1)));
+ hold on
+ surfl (squeeze (pz(1,:,:,2)), squeeze (pz(2,:,:,2)), squeeze (pz(3,:,:,2)));
+ surfl (squeeze (py(1,:,1,:)), squeeze (py(2,:,1,:)), squeeze (py(3,:,1,:)));
+ surfl (squeeze (py(1,:,2,:)), squeeze (py(2,:,2,:)), squeeze (py(3,:,2,:)));
+ surfl (squeeze (px(1,1,:,:)), squeeze (px(2,1,:,:)), squeeze (px(3,1,:,:)));
+ surfl (squeeze (px(1,2,:,:)), squeeze (px(2,2,:,:)), squeeze (px(3,2,:,:)));
+ shading interp;
+ else
+ surf (squeeze (pz(1,:,:,1)), squeeze (pz(2,:,:,1)), squeeze (pz(3,:,:,1)));
+ hold on
+ surf (squeeze (pz(1,:,:,2)), squeeze (pz(2,:,:,2)), squeeze (pz(3,:,:,2)));
+ surf (squeeze (py(1,:,1,:)), squeeze (py(2,:,1,:)), squeeze (py(3,:,1,:)));
+ surf (squeeze (py(1,:,2,:)), squeeze (py(2,:,2,:)), squeeze (py(3,:,2,:)));
+ surf (squeeze (px(1,1,:,:)), squeeze (px(2,1,:,:)), squeeze (px(3,1,:,:)));
+ surf (squeeze (px(1,2,:,:)), squeeze (px(2,2,:,:)), squeeze (px(3,2,:,:)));
+ shading faceted;
+ end
+
+ if (~hold_flag)
+ hold off
+ end
+
+ else
+ error ('nrbplot: some argument is not correct')
+ end
+else
+ % plot a NURBS curve
+ p = nrbeval (nurbs, linspace (0.0, 1.0, subd));
+
+ if (any (nurbs.coefs(3,:)))
+ % 3D curve
+ plot3 (p(1,:), p(2,:), p(3,:));
+ grid on;
+ else
+ % 2D curve
+ plot (p(1,:), p(2,:));
+ end
+end
+axis equal;
+
+end
+
+% plot the control surface
+% hold on;
+% mesh(squeeze(pnts(1,:,:)),squeeze(pnts(2,:,:)),squeeze(pnts(3,:,:)));
+% hold off;
+
+%!demo
+%! crv = nrbtestcrv;
+%! nrbplot(crv,100)
+%! title('Test curve')
+%! hold off
+
+%!demo
+%! coefs = [0.0 7.5 15.0 25.0 35.0 30.0 27.5 30.0;
+%! 0.0 2.5 0.0 -5.0 5.0 15.0 22.5 30.0];
+%! knots = [0.0 0.0 0.0 1/6 1/3 1/2 2/3 5/6 1.0 1.0 1.0];
+%!
+%! geom = [
+%! nrbmak(coefs,knots)
+%! nrbline([30.0 30.0],[20.0 30.0])
+%! nrbline([20.0 30.0],[20.0 20.0])
+%! nrbcirc(10.0,[10.0 20.0],1.5*pi,0.0)
+%! nrbline([10.0 10.0],[0.0 10.0])
+%! nrbline([0.0 10.0],[0.0 0.0])
+%! nrbcirc(5.0,[22.5 7.5])
+%! ];
+%!
+%! ng = length(geom);
+%! for i = 1:ng
+%! nrbplot(geom(i),500);
+%! hold on;
+%! end
+%! hold off;
+%! axis equal;
+%! title('2D Geometry formed by a series of NURBS curves');
+
+%!demo
+%! sphere = nrbrevolve(nrbcirc(1,[],0.0,pi),[0.0 0.0 0.0],[1.0 0.0 0.0]);
+%! nrbplot(sphere,[40 40],'light','on');
+%! title('Ball and torus - surface construction by revolution');
+%! hold on;
+%! torus = nrbrevolve(nrbcirc(0.2,[0.9 1.0]),[0.0 0.0 0.0],[1.0 0.0 0.0]);
+%! nrbplot(torus,[40 40],'light','on');
+%! hold off
+
+%!demo
+%! knots = {[0 0 0 1/2 1 1 1] [0 0 0 1 1 1]...
+%! [0 0 0 1/6 2/6 1/2 1/2 4/6 5/6 1 1 1]};
+%!
+%! coefs = [-1.0000 -0.9734 -0.7071 1.4290 1.0000 3.4172
+%! 0 2.4172 0 0.0148 -2.0000 -1.9734
+%! 0 2.0000 4.9623 9.4508 4.0000 2.0000
+%! 1.0000 1.0000 0.7071 1.0000 1.0000 1.0000
+%! -0.8536 0 -0.6036 1.9571 1.2071 3.5000
+%! 0.3536 2.5000 0.2500 0.5429 -1.7071 -1.0000
+%! 0 2.0000 4.4900 8.5444 3.4142 2.0000
+%! 0.8536 1.0000 0.6036 1.0000 0.8536 1.0000
+%! -0.3536 -4.0000 -0.2500 -1.2929 1.7071 1.0000
+%! 0.8536 0 0.6036 -2.7071 -1.2071 -5.0000
+%! 0 2.0000 4.4900 10.0711 3.4142 2.0000
+%! 0.8536 1.0000 0.6036 1.0000 0.8536 1.0000
+%! 0 -4.0000 0 0.7071 2.0000 5.0000
+%! 1.0000 4.0000 0.7071 -0.7071 -1.0000 -5.0000
+%! 0 2.0000 4.9623 14.4142 4.0000 2.0000
+%! 1.0000 1.0000 0.7071 1.0000 1.0000 1.0000
+%! -2.5000 -4.0000 -1.7678 0.7071 1.0000 5.0000
+%! 0 4.0000 0 -0.7071 -3.5000 -5.0000
+%! 0 2.0000 6.0418 14.4142 4.0000 2.0000
+%! 1.0000 1.0000 0.7071 1.0000 1.0000 1.0000
+%! -2.4379 0 -1.7238 2.7071 1.9527 5.0000
+%! 0.9527 4.0000 0.6737 1.2929 -3.4379 -1.0000
+%! 0 2.0000 6.6827 10.0711 4.0000 2.0000
+%! 1.0000 1.0000 0.7071 1.0000 1.0000 1.0000
+%! -0.9734 -1.0000 -0.6883 0.7071 3.4172 1.0000
+%! 2.4172 0 1.7092 -1.4142 -1.9734 -2.0000
+%! 0 4.0000 6.6827 4.9623 4.0000 0
+%! 1.0000 1.0000 0.7071 0.7071 1.0000 1.0000
+%! 0 -0.8536 0 0.8536 3.5000 1.2071
+%! 2.5000 0.3536 1.7678 -1.2071 -1.0000 -1.7071
+%! 0 3.4142 6.0418 4.4900 4.0000 0
+%! 1.0000 0.8536 0.7071 0.6036 1.0000 0.8536
+%! -4.0000 -0.3536 -2.8284 1.2071 1.0000 1.7071
+%! 0 0.8536 0 -0.8536 -5.0000 -1.2071
+%! 0 3.4142 7.1213 4.4900 4.0000 0
+%! 1.0000 0.8536 0.7071 0.6036 1.0000 0.8536
+%! -4.0000 0 -2.8284 1.4142 5.0000 2.0000
+%! 4.0000 1.0000 2.8284 -0.7071 -5.0000 -1.0000
+%! 0 4.0000 10.1924 4.9623 4.0000 0
+%! 1.0000 1.0000 0.7071 0.7071 1.0000 1.0000
+%! -4.0000 -2.5000 -2.8284 0.7071 5.0000 1.0000
+%! 4.0000 0 2.8284 -2.4749 -5.0000 -3.5000
+%! 0 4.0000 10.1924 6.0418 4.0000 0
+%! 1.0000 1.0000 0.7071 0.7071 1.0000 1.0000
+%! 0 -2.4379 0 1.3808 5.0000 1.9527
+%! 4.0000 0.9527 2.8284 -2.4309 -1.0000 -3.4379
+%! 0 4.0000 7.1213 6.6827 4.0000 0
+%! 1.0000 1.0000 0.7071 0.7071 1.0000 1.0000
+%! -1.0000 -0.9734 0.2071 2.4163 1.0000 3.4172
+%! 0 2.4172 -1.2071 -1.3954 -2.0000 -1.9734
+%! 2.0000 4.0000 7.0178 6.6827 2.0000 0
+%! 1.0000 1.0000 1.0000 0.7071 1.0000 1.0000
+%! -0.8536 0 0.3536 2.4749 1.2071 3.5000
+%! 0.3536 2.5000 -0.8536 -0.7071 -1.7071 -1.0000
+%! 1.7071 4.0000 6.3498 6.0418 1.7071 0
+%! 0.8536 1.0000 0.8536 0.7071 0.8536 1.0000
+%! -0.3536 -4.0000 0.8536 0.7071 1.7071 1.0000
+%! 0.8536 0 -0.3536 -3.5355 -1.2071 -5.0000
+%! 1.7071 4.0000 6.3498 7.1213 1.7071 0
+%! 0.8536 1.0000 0.8536 0.7071 0.8536 1.0000
+%! 0 -4.0000 1.2071 3.5355 2.0000 5.0000
+%! 1.0000 4.0000 -0.2071 -3.5355 -1.0000 -5.0000
+%! 2.0000 4.0000 7.0178 10.1924 2.0000 0
+%! 1.0000 1.0000 1.0000 0.7071 1.0000 1.0000
+%! -2.5000 -4.0000 -0.5429 3.5355 1.0000 5.0000
+%! 0 4.0000 -1.9571 -3.5355 -3.5000 -5.0000
+%! 2.0000 4.0000 8.5444 10.1924 2.0000 0
+%! 1.0000 1.0000 1.0000 0.7071 1.0000 1.0000
+%! -2.4379 0 -0.0355 3.5355 1.9527 5.0000
+%! 0.9527 4.0000 -1.4497 -0.7071 -3.4379 -1.0000
+%! 2.0000 4.0000 9.4508 7.1213 2.0000 0
+%! 1.0000 1.0000 1.0000 0.7071 1.0000 1.0000];
+%! coefs = reshape (coefs, 4, 4, 3, 9);
+%! horseshoe = nrbmak (coefs, knots);
+%! nrbplot (horseshoe, [6, 6, 50], 'light', 'on');
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff