-
Notifications
You must be signed in to change notification settings - Fork 38
/
cgcolorfill.pro
255 lines (236 loc) · 11.4 KB
/
cgcolorfill.pro
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
; docformat = 'rst'
;
; NAME:
; cgColorFill
;
; PURPOSE:
; Provides a device-independent and color-model-independent way to fill a polygon
; with a particular color.
;
;******************************************************************************************;
; ;
; Copyright (c) 2010, by Fanning Software Consulting, Inc. All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
;
;+
; Provides a device-independent and color-model-independent way to fill a polygon
; with a particular color. This is a wrapper to the PolyFill command in IDL.
;
; The program requires the `Coyote Library <http://www.idlcoyote.com/documents/programs.php>`
; to be installed on your machine.
;
; :Categories:
; Graphics
;
; :Params:
; x: in, required, type=number
; A vector argument providing the X coordinates of the points to be connected.
; The vector must contain at least three elements. If only one argument is
; specified, X must be an array of either two or three vectors (i.e., (2,*)
; or (3,*)). In this special case, the vector X[0,*] specifies the X values,
; X[1,*] specifies Y, and X[2,*] contain the Z values.
; y: in, required, type=number
; A vector argument providing the Y coordinates of the points to be connected.
; Y must contain at least three elements.
; z: in, optional, type=number
; An optional vector argument providing the Z coordinates of the points to be
; connected. Z must contain at least three elements.
;
; :Keywords:
; checkforfinite: in, optional, type=boolean, default=0
; If the input data is not finite (i.e., it contains NaNs), then the drawing of
; the polygons will be affected. This is particularly true if you are drawing polygons
; on map projections using the `Map_Object` keyword. The program could check all input for NaNs, but
; this would be quite slow when a great number of polygons are being drawn. For this reason,
; the program only checks polygon input when this keyword is set. Only polygons containing all
; finite values are drawn when this keyword is set.
; color: in, optional, type=string/byte/integer/long, default='rose'
; The name of the fill color. Color names are those used with cgColor.
; This value can also be a long integer or an index into the current color
; table.
; device: in, optional, type=boolean, default=0
; Set to indicate the polygon vertices are in device coordinates.
; map_object: in, optional, type=object
; If you are drawing on a map projection set up with Map_Proj_Init
; and using projected meter space, rather than lat/lon space, then you can use this
; keyword to provide a cgMap object that will allow you to convert the `x` and `y`
; parameters from longitude and latitude, respectively, to projected meter space
; before drawing. X and Y must both be present.
; normal: in, optional, type=boolean, default=0
; Set to indicate the polygon vertices are in normalized coordinates.
; position: in, optional, type=float
; Set to the normal four-element normalized position array for locating
; a rectangular region in a graphics window. If this keyword is used, the
; x and y parameters are constructed from this position.
; window: in, optional, type=boolean, default=0
; Set this keyword to add the command to the current cgWindow application.
; _ref_extra: in, optional, type=appropriate
; Any other keywords to the IDL POLYFILL command may be used.
;
; :Examples:
; Used like the IDL Polyfill command::
; IDL> cgColorFill, [0.25, 0.25, 0.75, 0.75, 0.25], [0.25, 0.75, 0.75, 0.25, 0.25], $
; /NORMAL, COLOR='blue'
;
; :Author:
; FANNING SOFTWARE CONSULTING::
; David W. Fanning
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: [email protected]
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com
;
; :History:
; Change History::
; Written, 24 December 2010. DWF.
; In some cases, I was turning BYTE values to strings without converting to
; INTEGERS first. 30 Dec 2010. DWF.
; Moved setting to decomposed color before color selection process to avoid PostScript
; background problems when passed 24-bit color integers. 12 Jan 2011. DWF.
; Added WINDOW keyword. 24 Jan 2011. DWF.
; Modified error handler to restore the entry decomposition state if there is an error. 17 March 2011. DWF
; Modified to use cgDefaultColor for default color selection. 24 Dec 2011. DWF.
; Added a POSITION keyword to allow setting the color position in a graphics window. 24 Jan 2013. DWF.
; Added a MAP_OBJECT keyword to allow polygon filling on maps. 13 Dec 2013. DWF.
; Completely forgot to deconstruct a single parameter into component parts. 11 Jan 2014. DWF.
; Added CheckForFinite keyword to check output for NaN values before display. 22 Jan 2014. DWF.
;
; :Copyright:
; Copyright (c) 2010-2014, Fanning Software Consulting, Inc.
;-
PRO cgColorFill, x, y, z, $
CHECKFORFINITE=checkForFinite, $
COLOR=color, $
MAP_OBJECT=map_object, $
NORMAL=normal, $
DEVICE=device, $
POSITION=position, $
WINDOW=window, $
_REF_EXTRA=extra
Compile_Opt idl2
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
IF N_Elements(currentState) NE 0 THEN cgSetColorState, currentState
RETURN
ENDIF
; Did user pass parameters?
IF (N_Params() EQ 0) && (N_Elements(position) EQ 0) THEN BEGIN
Print, 'USE SYNTAX: cgColorFill, x, y, [z]'
RETURN
ENDIF
; Should this be added to a resizeable graphics window?
IF Keyword_Set(window) AND ((!D.Flags AND 256) NE 0) THEN BEGIN
cgWindow, 'cgColorFill', x, y, z, $
CHECKFORFINITE=checkForFinite, $
COLOR=color, $
MAP_OBJECT=map_object, $
NORMAL=normal, $
DEVICE=device, $
POSITION=position, $
ADDCMD=1, $
_EXTRA=extra
RETURN
ENDIF
; Set up PostScript device for working with colors.
IF !D.Name EQ 'PS' THEN Device, COLOR=1, BITS_PER_PIXEL=8
; We are going to draw in decomposed color, if possible.
cgSetColorState, 1, Current=currentState
; Check for NaNs in the data?
SetDefaultValue, checkForFinite, 0
; If we only have a single parameter, see if it can be deconstructed.
IF N_Params() EQ 1 THEN BEGIN
dims = Size(x, /Dimensions)
ndims = Size(x, /N_Dimensions)
IF ndims EQ 1 THEN Message, 'If a single argument is supplied, it must be a 2D array.'
IF (dims[0] NE 2) && (dims[0] NE 3) THEN Message, 'Input argument is not dimensioned correctly.'
CASE dims[0] OF
2: BEGIN
y = Reform(x[1,*])
x = Reform(x[0,*])
END
3: BEGIN
z = Reform(x[2,*])
y = Reform(x[1,*])
x = Reform(x[0,*])
END
ENDCASE
ENDIF
; Use position to set up vectors?
IF N_Elements(position) NE 0 THEN BEGIN
p = position
x = [p[0], p[0], p[2], p[2], p[0]]
y = [p[1], p[3], p[3], p[1], p[1]]
normal = 1
ENDIF
; If current state is "indexed color" and colors are represented as long integers then "fix" them.
IF (currentState EQ 0) THEN BEGIN
IF Size(color, /TNAME) EQ 'LONG' THEN color = Fix(color)
ENDIF
; Need a color?
thisColor = cgDefaultColor(color, DEFAULT='rose')
; Get the current color vectors.
TVLCT, rr, gg, bb, /Get
; Do you have a map object? If so, assume lon/lat conversion to projected XY space.
; Check for NaNs, if requested, because some projections can contain a lot of them.
IF Obj_Valid(map_object) THEN BEGIN
xy = map_object -> Forward(x, y, /NoForwardFix)
xr = map_object.xrange
yr = map_object.yrange
_x = Reform(xy[0,*])
_y = Reform(xy[1,*])
IF checkForFinite THEN BEGIN
void = Where(Finite(_x) EQ 0, lonNaNCnt)
void = Where(Finite(_y) EQ 0, latNaNCnt)
ENDIF ELSE BEGIN
lonNaNCnt = 0
latNaNCnt = 0
ENDELSE
ENDIF ELSE BEGIN
_x = x
_y = y
IF checkForFinite THEN BEGIN
void = Where(Finite(_x) EQ 0, lonNaNCnt)
void = Where(Finite(_y) EQ 0, latNaNCnt)
ENDIF ELSE BEGIN
lonNaNCnt = 0
latNaNCnt = 0
ENDELSE
ENDELSE
; Fill the polygon as long as you don't have any NaNs in the data.
IF Size(thisColor, /TNAME) EQ 'STRING' THEN thisColor = cgColor(thisColor)
IF (lonNaNCnt EQ 0) && (latNaNCnt EQ 0) THEN BEGIN
CASE N_Elements(z) OF
0: PolyFill, _x, _y, COLOR=thisColor, NORMAL=normal, DEVICE=device, _STRICT_EXTRA=extra
ELSE: PolyFill, _x, _y, z, COLOR=thisColor, NORMAL=normal, DEVICE=device, _STRICT_EXTRA=extra
ENDCASE
ENDIF
; Clean up.
cgSetColorState, currentState
IF !D.Name NE 'Z' THEN TVLCT, rr, gg, bb
END