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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 |
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29 fail = false; |
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30 |
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31 if (nargin < 3) |
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32 fail = true; |
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33 return; |
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34 endif |
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35 |
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36 iarg = 1; |
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37 have_x = have_z = have_c = have_faces = false; |
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38 if (isnumeric (varargin{1})) |
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39 if (! isnumeric (varargin{2})) |
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40 fail = true; |
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41 return; |
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42 endif |
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43 |
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44 x = varargin{1}; |
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45 y = varargin{2}; |
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46 have_x = true; |
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47 iarg += 2; |
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48 |
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49 if (nargin > 3 && ndims (varargin{3}) == 2 && ndims (x) == 2 |
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50 && isequal (size (varargin{3}), size (x))) |
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51 z = varargin{3}; |
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52 have_z = true; |
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53 iarg++; |
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54 endif |
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55 elseif (ischar (varargin{1}) |
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56 && (strcmp (tolower (varargin{1}), "faces") |
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57 || trcmp (tolower (varargin{1}), "vertices"))) |
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58 if (! isnumeric (varargin{2})) |
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59 fail = true; |
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60 return; |
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61 endif |
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62 |
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63 if (strcmp (tolower (varargin{1}), "faces")) |
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64 faces = varargin{2}; |
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65 if (strcmp (tolower (varargin{3}), "vertices")) |
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66 vert = varargin{4}; |
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67 have_faces = true; |
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68 endif |
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69 elseif (strcmp (tolower (varargin{3}), "vertices")) |
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70 vert = varargin{2}; |
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71 if (strcmp (tolower (varargin{3}), "faces")) |
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72 faces = varargin{4}; |
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73 have_faces = true; |
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74 endif |
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75 endif |
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76 if (!have_faces) |
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77 fail = true; |
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78 return; |
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79 else |
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80 iarg += 4; |
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81 endif |
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82 endif |
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83 |
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84 if ((have_x || have_faces) && nargin > iarg) |
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85 if (isnumeric (varargin{iarg})) |
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86 c = varargin{iarg}; |
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87 have_c = true; |
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88 iarg++; |
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89 |
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90 if (ndims (c) == 3 && size (c, 2) == 1) |
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91 c = permute (c, [1, 3, 2]); |
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92 endif |
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93 elseif (ischar (varargin{iarg}) && rem (nargin - iarg, 2) != 0) |
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94 ## Assume that any additional argument over an even number is |
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95 ## color string. |
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96 c = tolower (varargin{iarg}); |
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97 have_c = true; |
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98 iarg++; |
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99 endif |
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100 endif |
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101 |
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102 if (rem (nargin - iarg, 2) != 0) |
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103 fail = true; |
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104 return; |
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105 endif |
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106 |
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107 if (have_x) |
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108 if (isvector (x)) |
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109 x = x(:); |
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110 y = y(:); |
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111 if (have_z) |
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112 z = z(:); |
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113 endif |
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114 endif |
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115 [nr, nc] = size (x); |
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116 if (have_z) |
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117 vert = [x(:), y(:), z(:)]; |
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118 else |
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119 vert = [x(:), y(:)]; |
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120 endif |
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121 faces = reshape (1:numel(x), rows (x), columns (x)); |
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122 faces = faces'; |
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123 elseif (have_faces) |
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124 nr = size (faces, 2); |
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125 nc = size (faces, 1); |
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126 idx = faces .'; |
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127 for i = 1: nc |
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128 t1 = isnan (idx (:,i)); |
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129 if (any (t1)) |
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130 t2 = find (t1(1:end-1) != t1(2:end))(1); |
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131 idx(t1,i) = idx(t2,i); |
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132 endif |
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133 endfor |
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134 x = reshape (vert(:,1)(idx), size (idx)); |
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135 y = reshape (vert(:,2)(idx), size (idx)); |
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136 if (size(vert,2) > 2) |
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137 have_z = true; |
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138 z = reshape (vert(:,3)(idx), size (idx)); |
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139 endif |
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140 else |
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141 error ("patch: not supported"); |
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142 endif |
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143 |
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144 cargs = {}; |
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145 if (have_c) |
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146 if (ischar (c)) |
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147 cargs{1} = "facecolor"; |
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148 cargs{2} = c; |
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149 elseif (isvector (c) && numel (c) == nc) |
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150 if (isnan (c)) |
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151 cargs{1} = "facecolor"; |
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152 cargs{2} = [1, 1, 1]; |
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153 cargs{3} = "cdata"; |
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154 cargs{4} = c; |
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155 elseif (isnumeric (c)) |
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156 cargs{1} = "facecolor"; |
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157 cargs{2} = "flat"; |
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158 cargs{3} = "cdata"; |
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159 cargs{4} = c; |
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160 else |
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161 error ("patch: color value not valid"); |
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162 endif |
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163 elseif (size (c, ndims (c)) == 3) |
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164 cargs{1} = "facecolor"; |
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165 cargs{2} = "flat"; |
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166 cargs{3} = "cdata"; |
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167 cargs{4} = c; |
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168 else |
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169 ## Color Vectors |
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170 if (rows (c2) != rows (x) || rows (c2) != length (y)) |
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171 error ("patch: size of x, y, and c must be equal") |
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172 else |
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173 cargs{1} = "facecolor"; |
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174 cargs{2} = "interp"; |
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175 endif |
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176 endif |
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177 else |
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178 cargs{1} = "facecolor"; |
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179 cargs{2} = [0, 1, 0]; |
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180 endif |
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181 |
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182 h = __go_patch__ (p, "xdata", x, "ydata", y, "faces", faces, |
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183 "vertices", vert, cargs{:}, varargin{iarg:end}); |
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184 if (have_z) |
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185 set (h, "zdata", z); |
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186 endif |
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187 |
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188 endfunction |
