source: trunk/client/modules/Elezioni/grafici-old/jpgraph_pie3d.php@ 2

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[2]1<?php
2/*=======================================================================
3// File: JPGRAPH_PIE3D.PHP
4// Description: 3D Pie plot extension for JpGraph
5// Created: 2001-03-24
6// Author: Johan Persson (johanp@aditus.nu)
7// Ver: $Id: jpgraph_pie3d.php,v 1.46 2003/05/26 20:49:48 aditus Exp $
8//
9// License: This code is released under QPL
10// Copyright (C) 2001,2002 Johan Persson
11//========================================================================
12*/
13
14//===================================================
15// CLASS PiePlot3D
16// Description: Plots a 3D pie with a specified projection
17// angle between 20 and 70 degrees.
18//===================================================
19class PiePlot3D extends PiePlot {
20 var $labelhintcolor="red",$showlabelhint=true,$labelmargin=0.30;
21 var $angle=50;
22 var $edgecolor="", $edgeweight=1;
23 var $iThickness=false;
24
25//---------------
26// CONSTRUCTOR
27 function PiePlot3d(&$data) {
28 $this->radius = 0.5;
29 $this->data = $data;
30 $this->title = new Text("");
31 $this->title->SetFont(FF_FONT1,FS_BOLD);
32 $this->value = new DisplayValue();
33 $this->value->Show();
34 $this->value->SetFormat('%.0f%%');
35 }
36
37//---------------
38// PUBLIC METHODS
39
40 // Set label arrays
41 function SetLegends($aLegend) {
42 $this->legends = array_reverse($aLegend);
43 }
44
45 function SetSliceColors($aColors) {
46 $this->setslicecolors = $aColors;
47 }
48
49 function Legend(&$aGraph) {
50 parent::Legend($aGraph);
51 $aGraph->legend->txtcol = array_reverse($aGraph->legend->txtcol);
52 }
53
54 function SetCSIMTargets($targets,$alts=null) {
55 $this->csimtargets = $targets;
56 $this->csimalts = $alts;
57 }
58
59 // Should the slices be separated by a line? If color is specified as "" no line
60 // will be used to separate pie slices.
61 function SetEdge($aColor,$aWeight=1) {
62 $this->edgecolor = $aColor;
63 $this->edgeweight = $aWeight;
64 }
65
66 // Specify projection angle for 3D in degrees
67 // Must be between 20 and 70 degrees
68 function SetAngle($a) {
69 if( $a<5 || $a>90 )
70 JpGraphError::Raise("PiePlot3D::SetAngle() 3D Pie projection angle must be between 5 and 85 degrees.");
71 else
72 $this->angle = $a;
73 }
74
75 function AddSliceToCSIM($i,$xc,$yc,$height,$width,$thick,$sa,$ea) { //Slice number, ellipse centre (x,y), height, width, start angle, end angle
76
77 $sa *= M_PI/180;
78 $ea *= M_PI/180;
79
80 //add coordinates of the centre to the map
81 $coords = "$xc, $yc";
82
83 //add coordinates of the first point on the arc to the map
84 $xp = floor($width*cos($sa)/2+$xc);
85 $yp = floor($yc-$height*sin($sa)/2);
86 $coords.= ", $xp, $yp";
87
88 //If on the front half, add the thickness offset
89 if ($sa >= M_PI && $sa <= 2*M_PI*1.01) {
90 $yp = floor($yp+$thick);
91 $coords.= ", $xp, $yp";
92 }
93
94 //add coordinates every 0.2 radians
95 $a=$sa+0.2;
96 while ($a<$ea) {
97 $xp = floor($width*cos($a)/2+$xc);
98 if ($a >= M_PI && $a <= 2*M_PI*1.01) {
99 $yp = floor($yc-($height*sin($a)/2)+$thick);
100 } else {
101 $yp = floor($yc-$height*sin($a)/2);
102 }
103 $coords.= ", $xp, $yp";
104 $a += 0.2;
105 }
106
107 //Add the last point on the arc
108 $xp = floor($width*cos($ea)/2+$xc);
109 $yp = floor($yc-$height*sin($ea)/2);
110
111
112 if ($ea >= M_PI && $ea <= 2*M_PI*1.01) {
113 $coords.= ", $xp, ".floor($yp+$thick);
114 }
115 $coords.= ", $xp, $yp";
116 $alt='';
117 if( !empty($this->csimalts[$i]) ) {
118 $tmp=sprintf($this->csimalts[$i],$this->data[$i]);
119 $alt="alt=\"$tmp\" title=\"$tmp\"";
120 }
121 if( !empty($this->csimtargets[$i]) )
122 $this->csimareas .= "<area shape=\"poly\" coords=\"$coords\" href=\"".$this->csimtargets[$i]."\" $alt>\n";
123 }
124
125 function SetLabels($aLabels,$aLblPosAdj="auto") {
126 $this->labels = $aLabels;
127 $this->ilabelposadj=$aLblPosAdj;
128 }
129
130
131 // Distance from the pie to the labels
132 function SetLabelMargin($m) {
133 assert($m>0 && $m<1);
134 $this->labelmargin=$m;
135 }
136
137 // Show a thin line from the pie to the label for a specific slice
138 function ShowLabelHint($f=true) {
139 $this->showlabelhint=$f;
140 }
141
142 // Set color of hint line to label for each slice
143 function SetLabelHintColor($c) {
144 $this->labelhintcolor=$c;
145 }
146
147 function SetHeight($aHeight) {
148 $this->iThickness = $aHeight;
149 }
150
151
152// Normalize Angle between 0-360
153 function NormAngle($a) {
154 // Normalize anle to 0 to 2M_PI
155 //
156 if( $a > 0 ) {
157 while($a > 360) $a -= 360;
158 }
159 else {
160 while($a < 0) $a += 360;
161 }
162 if( $a < 0 )
163 $a = 360 + $a;
164
165 if( $a == 360 ) $a=0;
166 return $a;
167 }
168
169
170
171// Draw one 3D pie slice at position ($xc,$yc) with height $z
172 function Pie3DSlice($img,$xc,$yc,$w,$h,$sa,$ea,$z,$fillcolor,$shadow=0.65) {
173
174 // Due to the way the 3D Pie algorithm works we are
175 // guaranteed that any slice we get into this method
176 // belongs to either the left or right side of the
177 // pie ellipse. Hence, no slice will cross 90 or 270
178 // point.
179 if( ($sa < 90 && $ea > 90) || ( ($sa > 90 && $sa < 270) && $ea > 270) ) {
180 JpGraphError::Raise('Internal assertion failed. Pie3D::Pie3DSlice');
181 exit(1);
182 }
183
184 $p[] = array();
185
186 // Setup pre-calculated values
187 $rsa = $sa/180*M_PI; // to Rad
188 $rea = $ea/180*M_PI; // to Rad
189 $sinsa = sin($rsa);
190 $cossa = cos($rsa);
191 $sinea = sin($rea);
192 $cosea = cos($rea);
193
194 // p[] is the points for the overall slice and
195 // pt[] is the points for the top pie
196
197 // Angular step when approximating the arc with a polygon train.
198 $step = 0.05;
199
200 if( $sa >= 270 ) {
201 if( $ea > 360 || ($ea > 0 && $ea <= 90) ) {
202 if( $ea > 0 && $ea <= 90 ) {
203 // Adjust angle to simplify conditions in loops
204 $rea += 2*M_PI;
205 }
206
207 $p = array($xc,$yc,$xc,$yc+$z,
208 $xc+$w*$cossa,$z+$yc-$h*$sinsa);
209 $pt = array($xc,$yc,$xc+$w*$cossa,$yc-$h*$sinsa);
210
211 for( $a=$rsa; $a < 2*M_PI; $a += $step ) {
212 $tca = cos($a);
213 $tsa = sin($a);
214 $p[] = $xc+$w*$tca;
215 $p[] = $z+$yc-$h*$tsa;
216 $pt[] = $xc+$w*$tca;
217 $pt[] = $yc-$h*$tsa;
218 }
219
220 $pt[] = $xc+$w;
221 $pt[] = $yc;
222
223 $p[] = $xc+$w;
224 $p[] = $z+$yc;
225 $p[] = $xc+$w;
226 $p[] = $yc;
227 $p[] = $xc;
228 $p[] = $yc;
229
230 for( $a=2*M_PI+$step; $a < $rea; $a += $step ) {
231 $pt[] = $xc + $w*cos($a);
232 $pt[] = $yc - $h*sin($a);
233 }
234
235 $pt[] = $xc+$w*$cosea;
236 $pt[] = $yc-$h*$sinea;
237 $pt[] = $xc;
238 $pt[] = $yc;
239
240 }
241 else {
242 $p = array($xc,$yc,$xc,$yc+$z,
243 $xc+$w*$cossa,$z+$yc-$h*$sinsa);
244 $pt = array($xc,$yc,$xc+$w*$cossa,$yc-$h*$sinsa);
245
246 $rea = $rea == 0.0 ? 2*M_PI : $rea;
247 for( $a=$rsa; $a < $rea; $a += $step ) {
248 $tca = cos($a);
249 $tsa = sin($a);
250 $p[] = $xc+$w*$tca;
251 $p[] = $z+$yc-$h*$tsa;
252 $pt[] = $xc+$w*$tca;
253 $pt[] = $yc-$h*$tsa;
254 }
255
256 $pt[] = $xc+$w*$cosea;
257 $pt[] = $yc-$h*$sinea;
258 $pt[] = $xc;
259 $pt[] = $yc;
260
261 $p[] = $xc+$w*$cosea;
262 $p[] = $z+$yc-$h*$sinea;
263 $p[] = $xc+$w*$cosea;
264 $p[] = $yc-$h*$sinea;
265 $p[] = $xc;
266 $p[] = $yc;
267 }
268 }
269 elseif( $sa >= 180 ) {
270 $p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cosea,$z+$yc-$h*$sinea);
271 $pt = array($xc,$yc,$xc+$w*$cosea,$yc-$h*$sinea);
272
273 for( $a=$rea; $a>$rsa; $a -= $step ) {
274 $tca = cos($a);
275 $tsa = sin($a);
276 $p[] = $xc+$w*$tca;
277 $p[] = $z+$yc-$h*$tsa;
278 $pt[] = $xc+$w*$tca;
279 $pt[] = $yc-$h*$tsa;
280 }
281
282 $pt[] = $xc+$w*$cossa;
283 $pt[] = $yc-$h*$sinsa;
284 $pt[] = $xc;
285 $pt[] = $yc;
286
287 $p[] = $xc+$w*$cossa;
288 $p[] = $z+$yc-$h*$sinsa;
289 $p[] = $xc+$w*$cossa;
290 $p[] = $yc-$h*$sinsa;
291 $p[] = $xc;
292 $p[] = $yc;
293
294 }
295 elseif( $sa >= 90 ) {
296 if( $ea > 180 ) {
297 $p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cosea,$z+$yc-$h*$sinea);
298 $pt = array($xc,$yc,$xc+$w*$cosea,$yc-$h*$sinea);
299
300 for( $a=$rea; $a > M_PI; $a -= $step ) {
301 $tca = cos($a);
302 $tsa = sin($a);
303 $p[] = $xc+$w*$tca;
304 $p[] = $z + $yc - $h*$tsa;
305 $pt[] = $xc+$w*$tca;
306 $pt[] = $yc-$h*$tsa;
307 }
308
309 $p[] = $xc-$w;
310 $p[] = $z+$yc;
311 $p[] = $xc-$w;
312 $p[] = $yc;
313 $p[] = $xc;
314 $p[] = $yc;
315
316 $pt[] = $xc-$w;
317 $pt[] = $z+$yc;
318 $pt[] = $xc-$w;
319 $pt[] = $yc;
320
321 for( $a=M_PI-$step; $a > $rsa; $a -= $step ) {
322 $pt[] = $xc + $w*cos($a);
323 $pt[] = $yc - $h*sin($a);
324 }
325
326 $pt[] = $xc+$w*$cossa;
327 $pt[] = $yc-$h*$sinsa;
328 $pt[] = $xc;
329 $pt[] = $yc;
330
331 }
332 else { // $sa >= 90 && $ea <= 180
333 $p = array($xc,$yc,$xc,$yc+$z,
334 $xc+$w*$cosea,$z+$yc-$h*$sinea,
335 $xc+$w*$cosea,$yc-$h*$sinea,
336 $xc,$yc);
337
338 $pt = array($xc,$yc,$xc+$w*$cosea,$yc-$h*$sinea);
339
340 for( $a=$rea; $a>$rsa; $a -= $step ) {
341 $pt[] = $xc + $w*cos($a);
342 $pt[] = $yc - $h*sin($a);
343 }
344
345 $pt[] = $xc+$w*$cossa;
346 $pt[] = $yc-$h*$sinsa;
347 $pt[] = $xc;
348 $pt[] = $yc;
349
350 }
351 }
352 else { // sa > 0 && ea < 90
353
354 $p = array($xc,$yc,$xc,$yc+$z,
355 $xc+$w*$cossa,$z+$yc-$h*$sinsa,
356 $xc+$w*$cossa,$yc-$h*$sinsa,
357 $xc,$yc);
358
359 $pt = array($xc,$yc,$xc+$w*$cossa,$yc-$h*$sinsa);
360
361 for( $a=$rsa; $a < $rea; $a += $step ) {
362 $pt[] = $xc + $w*cos($a);
363 $pt[] = $yc - $h*sin($a);
364 }
365
366 $pt[] = $xc+$w*$cosea;
367 $pt[] = $yc-$h*$sinea;
368 $pt[] = $xc;
369 $pt[] = $yc;
370 }
371
372 $img->PushColor($fillcolor.":".$shadow);
373 $img->FilledPolygon($p);
374 $img->PopColor();
375
376 $img->PushColor($fillcolor);
377 $img->FilledPolygon($pt);
378 $img->PopColor();
379 }
380
381// Draw a 3D Pie
382 function Pie3D($aaoption,$img,$data,$colors,$xc,$yc,$d,$angle,$z,
383 $shadow=0.65,$startangle=0,$edgecolor="",$edgeweight=1) {
384
385 //---------------------------------------------------------------------------
386 // As usual the algorithm get more complicated than I originally
387 // envisioned. I believe that this is as simple as it is possible
388 // to do it with the features I want. It's a good exercise to start
389 // thinking on how to do this to convince your self that all this
390 // is really needed for the general case.
391 //
392 // The algorithm two draw 3D pies without "real 3D" is done in
393 // two steps.
394 // First imagine the pie cut in half through a thought line between
395 // 12'a clock and 6'a clock. It now easy to imagine that we can plot
396 // the individual slices for each half by starting with the topmost
397 // pie slice and continue down to 6'a clock.
398 //
399 // In the algortithm this is done in three principal steps
400 // Step 1. Do the knife cut to ensure by splitting slices that extends
401 // over the cut line. This is done by splitting the original slices into
402 // upto 3 subslices.
403 // Step 2. Find the top slice for each half
404 // Step 3. Draw the slices from top to bottom
405 //
406 // The thing that slightly complicates this scheme with all the
407 // angle comparisons below is that we can have an arbitrary start
408 // angle so we must take into account the different equivalence classes.
409 // For the same reason we must walk through the angle array in a
410 // modulo fashion.
411 //
412 // Limitations of algorithm:
413 // * A small exploded slice which crosses the 270 degree point
414 // will get slightly nagged close to the center due to the fact that
415 // we print the slices in Z-order and that the slice left part
416 // get printed first and might get slightly nagged by a larger
417 // slice on the right side just before the right part of the small
418 // slice. Not a major problem though.
419 //---------------------------------------------------------------------------
420
421
422 // Determine the height of the ellippse which gives an
423 // indication of the inclination angle
424 $h = ($angle/90.0)*$d;
425 $sum = 0;
426 for($i=0; $i<count($data); ++$i ) {
427 $sum += $data[$i];
428 }
429
430 // Special optimization
431 if( $sum==0 ) return;
432
433 // Setup the start
434 $accsum = 0;
435 $a = $startangle;
436 $a = $this->NormAngle($a);
437
438 //
439 // Step 1 . Split all slices that crosses 90 or 270
440 //
441 $idx=0;
442 $adjexplode=array();
443 $numcolors = count($colors);
444 for($i=0; $i<count($data); ++$i, ++$idx ) {
445 $da = $data[$i]/$sum * 360;
446
447 if( empty($this->explode_radius[$i]) )
448 $this->explode_radius[$i]=0;
449
450 $expscale=1;
451 if( $aaoption == 1 )
452 $expscale=2;
453
454 $la = $a + $da/2;
455 $explode = array( $xc + $this->explode_radius[$i]*cos($la*M_PI/180)*$expscale,
456 $yc - $this->explode_radius[$i]*sin($la*M_PI/180) * ($h/$d) *$expscale );
457 $adjexplode[$idx] = $explode;
458 $labeldata[$i] = array($la,$explode[0],$explode[1]);
459 $originalangles[$i] = array($a,$a+$da);
460
461 $ne = $this->NormAngle($a+$da);
462 if( $da <= 180 ) {
463 // If the slice size is <= 90 it can at maximum cut across
464 // one boundary (either 90 or 270) where it needs to be split
465 $split=-1; // no split
466 if( ($da<=90 && ($a <= 90 && $ne > 90)) ||
467 (($da <= 180 && $da >90) && (($a < 90 || $a >= 270) && $ne > 90)) ) {
468 $split = 90;
469 }
470 elseif( ($da<=90 && ($a <= 270 && $ne > 270)) ||
471 (($da<=180 && $da>90) && ($a >= 90 && $a < 270 && ($a+$da) > 270 )) ) {
472 $split = 270;
473 }
474 if( $split > 0 ) { // split in two
475 $angles[$idx] = array($a,$split);
476 $adjcolors[$idx] = $colors[$i % $numcolors];
477 $adjexplode[$idx] = $explode;
478 $angles[++$idx] = array($split,$ne);
479 $adjcolors[$idx] = $colors[$i % $numcolors];
480 $adjexplode[$idx] = $explode;
481 }
482 else { // no split
483 $angles[$idx] = array($a,$ne);
484 $adjcolors[$idx] = $colors[$i % $numcolors];
485 $adjexplode[$idx] = $explode;
486 }
487 }
488 else {
489 // da>180
490 // Slice may, depending on position, cross one or two
491 // bonudaries
492
493 if( $a < 90 )
494 $split = 90;
495 elseif( $a <= 270 )
496 $split = 270;
497 else
498 $split = 90;
499
500 $angles[$idx] = array($a,$split);
501 $adjcolors[$idx] = $colors[$i % $numcolors];
502 $adjexplode[$idx] = $explode;
503 //if( $a+$da > 360-$split ) {
504 // For slices larger than 270 degrees we might cross
505 // another boundary as well. This means that we must
506 // split the slice further. The comparison gets a little
507 // bit complicated since we must take into accound that
508 // a pie might have a startangle >0 and hence a slice might
509 // wrap around the 0 angle.
510 // Three cases:
511 // a) Slice starts before 90 and hence gets a split=90, but
512 // we must also check if we need to split at 270
513 // b) Slice starts after 90 but before 270 and slices
514 // crosses 90 (after a wrap around of 0)
515 // c) If start is > 270 (hence the firstr split is at 90)
516 // and the slice is so large that it goes all the way
517 // around 270.
518 if( ($a < 90 && ($a+$da > 270)) ||
519 ($a > 90 && $a<=270 && ($a+$da>360+90) ) ||
520 ($a > 270 && $this->NormAngle($a+$da)>270) ) {
521 $angles[++$idx] = array($split,360-$split);
522 $adjcolors[$idx] = $colors[$i % $numcolors];
523 $adjexplode[$idx] = $explode;
524 $angles[++$idx] = array(360-$split,$ne);
525 $adjcolors[$idx] = $colors[$i % $numcolors];
526 $adjexplode[$idx] = $explode;
527 }
528 else {
529 // Just a simple split to the previous decided
530 // angle.
531 $angles[++$idx] = array($split,$ne);
532 $adjcolors[$idx] = $colors[$i % $numcolors];
533 $adjexplode[$idx] = $explode;
534 }
535 }
536 $a += $da;
537 $a = $this->NormAngle($a);
538 }
539
540 // Total number of slices
541 $n = count($angles);
542
543 for($i=0; $i<$n; ++$i) {
544 list($dbgs,$dbge) = $angles[$i];
545 }
546
547 //
548 // Step 2. Find start index (first pie that starts in upper left quadrant)
549 //
550 $minval = $angles[0][0];
551 $min = 0;
552 for( $i=0; $i<$n; ++$i ) {
553 if( $angles[$i][0] < $minval ) {
554 $minval = $angles[$i][0];
555 $min = $i;
556 }
557 }
558 $j = $min;
559 $cnt = 0;
560 while( $angles[$j][1] <= 90 ) {
561 $j++;
562 if( $j>=$n) {
563 $j=0;
564 }
565 if( $cnt > $n ) {
566 JpGraphError::Raise("Pie3D Internal error (#1). Trying to wrap twice when looking for start index");
567 }
568 ++$cnt;
569 }
570 $start = $j;
571
572 //
573 // Step 3. Print slices in z-order
574 //
575 $cnt = 0;
576
577 // First stroke all the slices between 90 and 270 (left half circle)
578 // counterclockwise
579
580 while( $angles[$j][0] < 270 && $aaoption !== 2 ) {
581
582 list($x,$y) = $adjexplode[$j];
583
584 $this->Pie3DSlice($img,$x,$y,$d,$h,$angles[$j][0],$angles[$j][1],
585 $z,$adjcolors[$j],$shadow);
586
587 $last = array($x,$y,$j);
588
589 $j++;
590 if( $j >= $n ) $j=0;
591 if( $cnt > $n ) {
592 JpGraphError::Raise("Pie3D Internal Error: Z-Sorting algorithm for 3D Pies is not working properly (2). Trying to wrap twice while stroking.");
593 }
594 ++$cnt;
595 }
596
597 $slice_left = $n-$cnt;
598 $j=$start-1;
599 if($j<0) $j=$n-1;
600 $cnt = 0;
601
602 // The stroke all slices from 90 to -90 (right half circle)
603 // clockwise
604 while( $cnt < $slice_left && $aaoption !== 2 ) {
605
606 list($x,$y) = $adjexplode[$j];
607
608 $this->Pie3DSlice($img,$x,$y,$d,$h,$angles[$j][0],$angles[$j][1],
609 $z,$adjcolors[$j],$shadow);
610 $j--;
611 if( $cnt > $n ) {
612 JpGraphError::Raise("Pie3D Internal Error: Z-Sorting algorithm for 3D Pies is not working properly (2). Trying to wrap twice while stroking.");
613 }
614 if($j<0) $j=$n-1;
615 $cnt++;
616 }
617
618 // Now do a special thing. Stroke the last slice on the left
619 // halfcircle one more time. This is needed in the case where
620 // the slice close to 270 have been exploded. In that case the
621 // part of the slice close to the center of the pie might be
622 // slightly nagged.
623 if( $aaoption !== 2 )
624 $this->Pie3DSlice($img,$last[0],$last[1],$d,$h,$angles[$last[2]][0],
625 $angles[$last[2]][1],$z,$adjcolors[$last[2]],$shadow);
626
627
628 if( $aaoption !== 1 ) {
629 // Now print possible labels and add csim
630 $img->SetFont($this->value->ff,$this->value->fs);
631 $margin = $img->GetFontHeight()/2;
632 for($i=0; $i < count($data); ++$i ) {
633 $la = $labeldata[$i][0];
634 $x = $labeldata[$i][1] + cos($la*M_PI/180)*($d+$margin);
635 $y = $labeldata[$i][2] - sin($la*M_PI/180)*($h+$margin);
636 if( $la > 180 && $la < 360 ) $y += $z;
637 if( $this->labeltype == 0 )
638 if( $sum > 0 )
639 $l = 100*$data[$i]/$sum;
640 else
641 $l = 0;
642 else
643 $l = $data[$i];
644 if( isset($this->labels[$i]) && is_string($this->labels[$i]) )
645 $l=sprintf($this->labels[$i],$l);
646
647 $this->StrokeLabels($l,$img,$labeldata[$i][0]*M_PI/180,$x,$y,$z);
648
649 $this->AddSliceToCSIM($i,$labeldata[$i][1],$labeldata[$i][2],$h*2,$d*2,$z,
650 $originalangles[$i][0],$originalangles[$i][1]);
651 }
652 }
653
654 //
655 // Finally add potential lines in pie
656 //
657
658 if( $edgecolor=="" || $aaoption !== 0 ) return;
659
660 $accsum = 0;
661 $a = $startangle;
662 $a = $this->NormAngle($a);
663
664 $a *= M_PI/180.0;
665
666 $idx=0;
667 $img->PushColor($edgecolor);
668 $img->SetLineWeight($edgeweight);
669
670 $fulledge = true;
671 for($i=0; $i < count($data) && $fulledge; ++$i ) {
672 if( empty($this->explode_radius[$i]) )
673 $this->explode_radius[$i]=0;
674 if( $this->explode_radius[$i] > 0 ) {
675 $fulledge = false;
676 }
677 }
678
679
680 for($i=0; $i < count($data); ++$i, ++$idx ) {
681
682 $da = $data[$i]/$sum * 2*M_PI;
683 $this->StrokeFullSliceFrame($img,$xc,$yc,$a,$a+$da,$d,$h,$z,$edgecolor,
684 $this->explode_radius[$i],$fulledge);
685 $a += $da;
686 }
687 $img->PopColor();
688 }
689
690 function StrokeFullSliceFrame($img,$xc,$yc,$sa,$ea,$w,$h,$z,$edgecolor,$exploderadius,$fulledge) {
691 $step = 0.02;
692
693 if( $exploderadius > 0 ) {
694 $la = ($sa+$ea)/2;
695 $xc += $exploderadius*cos($la);
696 $yc -= $exploderadius*sin($la) * ($h/$w) ;
697
698 }
699
700 $p = array($xc,$yc,$xc+$w*cos($sa),$yc-$h*sin($sa));
701
702 for($a=$sa; $a < $ea; $a += $step ) {
703 $p[] = $xc + $w*cos($a);
704 $p[] = $yc - $h*sin($a);
705 }
706
707 $p[] = $xc+$w*cos($ea);
708 $p[] = $yc-$h*sin($ea);
709 $p[] = $xc;
710 $p[] = $yc;
711
712 $img->SetColor($edgecolor);
713 $img->Polygon($p);
714
715 // Unfortunately we can't really draw the full edge around the whole of
716 // of the slice if any of the slices are exploded. The reason is that
717 // this algorithm is to simply. There are cases where the edges will
718 // "overwrite" other slices when they have been exploded.
719 // Doing the full, proper 3D hidden lines stiff is actually quite
720 // tricky. So for exploded pies we only draw the top edge. Not perfect
721 // but the "real" solution is much more complicated.
722 if( $fulledge && !( $sa > 0 && $sa < M_PI && $ea < M_PI) ) {
723
724 if($sa < M_PI && $ea > M_PI)
725 $sa = M_PI;
726
727 if($sa < 2*M_PI && (($ea >= 2*M_PI) || ($ea > 0 && $ea < $sa ) ) )
728 $ea = 2*M_PI;
729
730 if( $sa >= M_PI && $ea <= 2*M_PI ) {
731 $p = array($xc + $w*cos($sa),$yc - $h*sin($sa),
732 $xc + $w*cos($sa),$z + $yc - $h*sin($sa));
733
734 for($a=$sa+$step; $a < $ea; $a += $step ) {
735 $p[] = $xc + $w*cos($a);
736 $p[] = $z + $yc - $h*sin($a);
737 }
738 $p[] = $xc + $w*cos($ea);
739 $p[] = $z + $yc - $h*sin($ea);
740 $p[] = $xc + $w*cos($ea);
741 $p[] = $yc - $h*sin($ea);
742 $img->SetColor($edgecolor);
743 $img->Polygon($p);
744 }
745 }
746 }
747
748 function Stroke($img,$aaoption=0) {
749
750 // If user hasn't set the colors use the theme array
751 if( $this->setslicecolors==null ) {
752 $colors = array_keys($img->rgb->rgb_table);
753 sort($colors);
754 $idx_a=$this->themearr[$this->theme];
755 $ca = array();
756 $n = count($idx_a);
757 for($i=0; $i < $n; ++$i)
758 $ca[$i] = $colors[$idx_a[$i]];
759 }
760 else {
761 $ca = $this->setslicecolors;
762 }
763
764 if( $this->posx <= 1 && $this->posx > 0 )
765 $xc = round($this->posx*$img->width);
766 else
767 $xc = $this->posx ;
768
769 if( $this->posy <= 1 && $this->posy > 0 )
770 $yc = round($this->posy*$img->height);
771 else
772 $yc = $this->posy ;
773
774 if( $this->radius <= 1 ) {
775 $width = floor($this->radius*min($img->width,$img->height));
776 // Make sure that the pie doesn't overflow the image border
777 // The 0.9 factor is simply an extra margin to leave some space
778 // between the pie an the border of the image.
779 $width = min($width,min($xc*0.9,($yc*90/$this->angle-$width/4)*0.9));
780 }
781 else {
782 $width = $this->radius * ($aaoption === 1 ? 2 : 1 ) ;
783 }
784
785 // Add a sanity check for width
786 if( $width < 1 ) {
787 JpGraphError::Raise("Width for 3D Pie is 0. Specify a size > 0");
788 exit();
789 }
790
791 // Establish a thickness. By default the thickness is a fifth of the
792 // pie slice width (=pie radius) but since the perspective depends
793 // on the inclination angle we use some heuristics to make the edge
794 // slightly thicker the less the angle.
795
796 // Has user specified an absolute thickness? In that case use
797 // that instead
798
799 if( $this->iThickness ) {
800 $thick = $this->iThickness;
801 $thick *= ($aaoption === 1 ? 2 : 1 );
802 }
803 else
804 $thick = $width/12;
805 $a = $this->angle;
806 if( $a <= 30 ) $thick *= 1.6;
807 elseif( $a <= 40 ) $thick *= 1.4;
808 elseif( $a <= 50 ) $thick *= 1.2;
809 elseif( $a <= 60 ) $thick *= 1.0;
810 elseif( $a <= 70 ) $thick *= 0.8;
811 elseif( $a <= 80 ) $thick *= 0.7;
812 else $thick *= 0.6;
813
814 $thick = floor($thick);
815
816 if( $this->explode_all )
817 for($i=0;$i<count($this->data);++$i)
818 $this->explode_radius[$i]=$this->explode_r;
819
820 $this->Pie3D($aaoption,$img,$this->data, $ca, $xc, $yc, $width, $this->angle,
821 $thick, 0.65, $this->startangle, $this->edgecolor, $this->edgeweight);
822
823 // Adjust title position
824 if( $aaoption != 1 ) {
825 $this->title->Pos($xc,$yc-$this->title->GetFontHeight($img)-$width/2-$this->title->margin, "center","bottom");
826 $this->title->Stroke($img);
827 }
828 }
829
830//---------------
831// PRIVATE METHODS
832
833 // Position the labels of each slice
834 function StrokeLabels($label,$img,$a,$xp,$yp,$z) {
835 $this->value->halign="left";
836 $this->value->valign="top";
837 $this->value->margin=0;
838
839 // Position the axis title.
840 // dx, dy is the offset from the top left corner of the bounding box that sorrounds the text
841 // that intersects with the extension of the corresponding axis. The code looks a little
842 // bit messy but this is really the only way of having a reasonable position of the
843 // axis titles.
844 $img->SetFont($this->value->ff,$this->value->fs,$this->value->fsize);
845 $h=$img->GetTextHeight($label);
846 // For numeric values the format of the display value
847 // must be taken into account
848 if( is_numeric($label) ) {
849 if( $label > 0 )
850 $w=$img->GetTextWidth(sprintf($this->value->format,$label));
851 else
852 $w=$img->GetTextWidth(sprintf($this->value->negormat,$label));
853 }
854 else
855 $w=$img->GetTextWidth($label);
856 while( $a > 2*M_PI ) $a -= 2*M_PI;
857 if( $a>=7*M_PI/4 || $a <= M_PI/4 ) $dx=0;
858 if( $a>=M_PI/4 && $a <= 3*M_PI/4 ) $dx=($a-M_PI/4)*2/M_PI;
859 if( $a>=3*M_PI/4 && $a <= 5*M_PI/4 ) $dx=1;
860 if( $a>=5*M_PI/4 && $a <= 7*M_PI/4 ) $dx=(1-($a-M_PI*5/4)*2/M_PI);
861
862 if( $a>=7*M_PI/4 ) $dy=(($a-M_PI)-3*M_PI/4)*2/M_PI;
863 if( $a<=M_PI/4 ) $dy=(1-$a*2/M_PI);
864 if( $a>=M_PI/4 && $a <= 3*M_PI/4 ) $dy=1;
865 if( $a>=3*M_PI/4 && $a <= 5*M_PI/4 ) $dy=(1-($a-3*M_PI/4)*2/M_PI);
866 if( $a>=5*M_PI/4 && $a <= 7*M_PI/4 ) $dy=0;
867
868 $x = round($xp-$dx*$w);
869 $y = round($yp-$dy*$h);
870
871 /*
872 // Mark anchor point for debugging
873 $img->SetColor('red');
874 $img->Line($xp-10,$yp,$xp+10,$yp);
875 $img->Line($xp,$yp-10,$xp,$yp+10);
876 */
877
878 $this->value->Stroke($img,$label,$x,$y);
879 }
880} // Class
881
882/* EOF */
883?>
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