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1 ## Copyright (C) 2007 John W. Eaton, Shai Ayal, Kai Habel |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 3 of the License, or (at |
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8 ## your option) any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## Undocumented internal function. |
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20 |
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21 ## __patch__ (p, x, y, c) |
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22 ## Create patch object from x and y with color c and parent p. |
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23 ## Return handle to patch object. |
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24 |
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25 ## Author: Kai Habel |
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26 |
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27 function [h, fail] = __patch__ (p, varargin) |
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28 fail = false; |
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29 if (nargin < 3) |
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30 fail = true; |
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31 return; |
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32 endif |
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33 |
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34 iarg = 1; |
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35 have_x = have_z = have_c = have_faces = false; |
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36 if (isnumeric (varargin{1})) |
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37 if (! isnumeric (varargin{2})) |
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38 fail = true; |
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39 return; |
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40 endif |
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41 |
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42 x = varargin{1}; |
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43 y = varargin{2}; |
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44 have_x = true; |
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45 iarg += 2; |
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46 |
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47 if (nargin > 3 && ndims (varargin{3}) == 2 && ndims (x) == 2 |
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48 && isequal (size (varargin{3}), size (x))) |
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49 z = varargin {3}; |
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50 have_z = true; |
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51 iarg++; |
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52 endif |
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53 elseif (ischar (varargin{1}) && (strcmp (tolower (varargin{1}), "faces") || |
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54 strcmp (tolower (varargin{1}), "vertices"))) |
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55 if (! isnumeric (varargin{2})) |
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56 fail = true; |
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57 return; |
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58 endif |
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59 |
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60 if (strcmp (tolower (varargin{1}), "faces")) |
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61 faces = varargin{2}; |
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62 if (strcmp (tolower (varargin{3}), "vertices")) |
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63 vert = varargin{4}; |
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64 have_faces = true; |
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65 endif |
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66 elseif (strcmp (tolower (varargin{3}), "vertices")) |
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67 vert = varargin{2}; |
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68 if (strcmp (tolower (varargin{3}), "faces")) |
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69 faces = varargin{4}; |
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70 have_faces = true; |
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71 endif |
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72 endif |
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73 if (!have_faces) |
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74 fail = true; |
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75 return; |
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76 else |
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77 iarg += 4; |
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78 endif |
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79 endif |
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80 |
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81 if ((have_x || have_faces) && nargin > iarg) |
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82 if (isnumeric (varargin{iarg})) |
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83 c = varargin{iarg}; |
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84 have_c = true; |
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85 iarg++; |
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86 |
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87 if (ndims (c) == 3 && size (c, 2) == 1) |
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88 c = permute (c, [1, 3, 2]); |
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89 endif |
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90 elseif (ischar (varargin{iarg}) && rem (nargin - iarg, 2) != 0) |
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91 ## Assume that any additional argument over an even number is color string |
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92 c = tolower (varargin{iarg}); |
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93 have_c = true; |
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94 iarg++; |
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95 endif |
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96 endif |
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97 |
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98 if (rem (nargin - iarg, 2) != 0) |
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99 fail = true; |
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100 return; |
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101 endif |
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102 |
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103 if (have_x) |
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104 if (isvector (x)) |
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105 x = x(:); |
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106 y = y(:); |
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107 if (have_z) |
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108 z = z(:); |
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109 endif |
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110 endif |
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111 [nr, nc] = size (x); |
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112 if (have_z) |
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113 vert = [x(:), y(:), z(:)]; |
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114 else |
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115 vert = [x(:), y(:)]; |
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116 endif |
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117 faces = reshape (1:numel(x), rows (x), columns (x)); |
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118 faces = faces'; |
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119 elseif (have_faces) |
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120 nr = size (faces, 2); |
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121 nc = size (faces, 1); |
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122 idx = faces .'; |
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123 for i = 1: nc |
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124 t1 = isnan (idx (:,i)); |
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125 if (any (t1)) |
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126 t2 = find (t1(1:end-1) != t1(2:end))(1); |
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127 idx(t1,i) = idx(t2,i); |
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128 endif |
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129 endfor |
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130 x = reshape (vert(:,1)(idx), size (idx)); |
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131 y = reshape (vert(:,2)(idx), size (idx)); |
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132 if (size(vert,2) > 2) |
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133 have_z = true; |
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134 z = reshape (vert(:,3)(idx), size (idx)); |
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135 endif |
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136 else |
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137 error ("patch: not supported"); |
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138 endif |
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139 |
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140 h = __go_patch__ (p); |
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141 ax = get (h, "parent"); |
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142 |
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143 cargs = {}; |
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144 if (have_c) |
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145 if (ischar (c)) |
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146 cargs{1} = "facecolor"; |
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147 cargs{2} = c; |
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148 elseif (isvector(c) && numel(c) == nc) |
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149 if (isnan (c)) |
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150 cargs{1} = "facecolor"; |
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151 cargs{2} = [1, 1, 1]; |
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152 cargs{3} = "cdata"; |
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153 cargs{4} = c; |
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154 elseif (isnumeric (c)) |
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155 cargs{1} = "facecolor"; |
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156 cargs{2} = "flat"; |
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157 cargs{3} = "cdata"; |
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158 cargs{4} = c; |
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159 clim = get(ax, "clim"); |
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160 if (c(1) < clim(1)) |
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161 set (ax, "clim", [c(1), clim(2)]) |
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162 clim(1) = c(1); |
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163 endif |
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164 if (c(1) > clim(2)) |
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165 set (ax, "clim", [clim(1), c(1)]) |
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166 endif |
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167 else |
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168 error ("patch: color value not valid"); |
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169 endif |
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170 elseif (size(c, ndims(c)) == 3) |
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171 cargs{1} = "facecolor"; |
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172 cargs{2} = "flat"; |
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173 cargs{3} = "cdata"; |
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174 cargs{4} = c; |
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175 else |
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176 ## Color Vectors |
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177 |
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178 if (rows (c2) != rows (x) || rows (c2) != length (y)) |
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179 error ("patch: size of x, y, and c must be equal") |
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180 else |
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181 cargs{1} = "facecolor"; |
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182 cargs{2} = "interp"; |
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183 if (abs(max(c2(:)) - min(c2(:))) < eps) |
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184 set (ax, "clim", [c2(1)-1, c2(1)+1]) |
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185 else |
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186 set (ax, "clim", [min(c2(:)), max(c2(:))]); |
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187 endif |
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188 endif |
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189 endif |
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190 else |
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191 cargs{1} = "facecolor"; |
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192 cargs{2} = [0, 1, 0]; |
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193 endif |
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194 |
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195 set (h, "xdata", x, "ydata", y, "faces", faces, "vertices", vert, ... |
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196 cargs{:}, varargin{iarg:end}); |
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197 if (have_z) |
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198 set (h, "zdata", z); |
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199 endif |
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200 |
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201 endfunction |
