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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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 ## 02110-1301, USA. |
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19 |
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20 ## Undocumented internal function. |
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21 |
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22 ## __patch__ (p, x, y, c) |
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23 ## Create patch object from x and y with color c and parent p. |
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24 ## Return handle to patch object. |
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25 |
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26 ## Author: Kai Habel |
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27 |
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28 function h = __patch__ (p, varargin) |
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29 |
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30 if (nargin < 3) |
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31 print_usage (); |
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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 = false; |
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36 if (isnumeric (varargin{1})) |
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37 if (! isnumeric (varargin{2})) |
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38 print_usage (); |
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39 endif |
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40 |
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41 x = varargin{1}; |
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42 y = varargin{2}; |
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43 have_x = true; |
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44 iarg += 2; |
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45 |
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46 if (nargin > 3 && ndims (varargin{3}) == 2 && ndims (x) == 2 |
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47 && size (varargin{3}) == size (x)) |
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48 z = varargin {3}; |
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49 have_z = true; |
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50 iarg++; |
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51 endif |
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52 endif |
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53 |
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54 if (have_x && nargin > iarg) |
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55 if (isnumeric (varargin{iarg})) |
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56 c = varargin{iarg}; |
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57 have_c = true; |
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58 iarg++; |
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59 |
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60 if (ndims (c) == 3 && size (c, 2) == 1) |
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61 c = permute (c, [1, 3, 2]); |
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62 endif |
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63 elseif (ischar (varargin{iarg}) && rem (nargin - iarg, 2) != 0) |
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64 ## Assume that any additional argument over an even number is color string |
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65 c = tolower (varargin{iarg}); |
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66 have_c = true; |
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67 iarg++; |
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68 endif |
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69 endif |
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70 |
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71 if (rem (nargin - iarg, 2) != 0) |
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72 print_usage (); |
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73 endif |
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74 |
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75 if (have_x) |
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76 if (isvector (x)) |
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77 x = x(:); |
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78 y = y(:); |
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79 if (have_z) |
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80 z = z(:); |
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81 endif |
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82 endif |
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83 |
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84 [nr, nc] = size (x); |
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85 |
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86 for i = 1 : nc |
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87 h = __go_patch__ (p); |
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88 ax = get (h, "parent"); |
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89 if (have_x) |
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90 set (h, "xdata", x (:, i), "ydata", y (:, i)); |
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91 if (have_z) |
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92 set (h, "zdata", z (:, i)); |
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93 endif |
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94 endif |
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95 |
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96 if (have_c) |
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97 if (ndims (c) == 2 && ((nr > 3 && size (c, 2) == nc) |
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98 || (size (c, 1) > 1 && size (c, 2) == nc))) |
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99 c2 = c (:, i); |
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100 elseif (ndims (c) == 3) |
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101 c2 = permute (c(:,i,:), [1, 3, 2]); |
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102 else |
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103 c2 = c; |
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104 endif |
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105 |
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106 if (ischar (c2)) |
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107 set (h, "facecolor", c2); |
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108 elseif (numel (c2) == 1) |
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109 if (isnan (c)) |
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110 set (h, "facecolor", [1, 1, 1]); |
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111 set (h, "cdata", c2); |
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112 elseif (isnumeric (c2)) |
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113 ## Have color index. |
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114 set (h, "facecolor", "flat"); |
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115 set (h, "cdata", c2); |
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116 clim = get(ax, "clim"); |
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117 if (c2 < clim(1)) |
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118 set (ax, "clim", [c2, clim(2)]) |
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119 endif |
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120 if (c2 > clim(2)) |
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121 set (ax, "clim", [clim(1), c2]) |
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122 endif |
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123 else |
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124 ## Unknown color value. |
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125 error ("patch: color value not valid"); |
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126 endif |
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127 elseif (numel (c2) == 3) |
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128 ## Have rgb/rgba value. |
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129 set (h, "facecolor", c2); |
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130 else |
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131 ## Color vector. |
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132 if (length (c2) != length (x) || length (c2) != length (y)) |
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133 error ("patch: size of x, y, and c must be equal") |
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134 else |
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135 set (h, "facecolor", "interp"); |
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136 set(h, "cdata", c2); |
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137 if (abs(max(c2) - min(c2)) < eps) |
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138 set (ax, "clim", [c2(1)-1, c2(1)+1]) |
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139 else |
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140 set (ax, "clim", [min(c2), max(c2)]); |
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141 endif |
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142 endif |
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143 endif |
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144 else |
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145 set (h, "facecolor", [0, 1, 0]); |
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146 endif |
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147 |
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148 if (nargin > iarg + 1) |
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149 set (h, varargin{iarg:end}); |
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150 endif |
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151 endfor |
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152 else |
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153 error ("patch: not supported"); |
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154 endif |
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155 |
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156 endfunction |
