| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: misc.cpp |
| 3 | // Purpose: Miscellaneous OGL support functions |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 12/07/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | #pragma implementation "misc.h" |
| 14 | #endif |
| 15 | |
| 16 | // For compilers that support precompilation, includes "wx.h". |
| 17 | #include <wx/wxprec.h> |
| 18 | |
| 19 | #ifdef __BORLANDC__ |
| 20 | #pragma hdrstop |
| 21 | #endif |
| 22 | |
| 23 | #ifndef WX_PRECOMP |
| 24 | #include <wx/wx.h> |
| 25 | #endif |
| 26 | |
| 27 | #include <wx/wxexpr.h> |
| 28 | |
| 29 | #include <wx/types.h> |
| 30 | |
| 31 | #if wxUSE_IOSTREAMH |
| 32 | #include <iostream.h> |
| 33 | #else |
| 34 | #include <iostream> |
| 35 | #endif |
| 36 | #include <ctype.h> |
| 37 | #include <math.h> |
| 38 | #include <stdlib.h> |
| 39 | |
| 40 | #include <wx/ogl/basic.h> |
| 41 | #include <wx/ogl/basicp.h> |
| 42 | #include <wx/ogl/misc.h> |
| 43 | #include <wx/ogl/constrnt.h> |
| 44 | #include <wx/ogl/composit.h> |
| 45 | |
| 46 | wxFont* g_oglNormalFont; |
| 47 | wxPen* g_oglBlackPen; |
| 48 | wxPen* g_oglWhiteBackgroundPen; |
| 49 | wxPen* g_oglTransparentPen; |
| 50 | wxBrush* g_oglWhiteBackgroundBrush; |
| 51 | wxPen* g_oglBlackForegroundPen; |
| 52 | wxCursor* g_oglBullseyeCursor = NULL; |
| 53 | |
| 54 | char* oglBuffer = NULL; |
| 55 | |
| 56 | wxList oglObjectCopyMapping(wxKEY_INTEGER); |
| 57 | |
| 58 | |
| 59 | |
| 60 | void wxOGLInitialize() |
| 61 | { |
| 62 | g_oglBullseyeCursor = new wxCursor(wxCURSOR_BULLSEYE); |
| 63 | |
| 64 | g_oglNormalFont = new wxFont(10, wxSWISS, wxNORMAL, wxNORMAL); |
| 65 | |
| 66 | g_oglBlackPen = new wxPen("BLACK", 1, wxSOLID); |
| 67 | |
| 68 | g_oglWhiteBackgroundPen = new wxPen("WHITE", 1, wxSOLID); |
| 69 | g_oglTransparentPen = new wxPen("WHITE", 1, wxTRANSPARENT); |
| 70 | g_oglWhiteBackgroundBrush = new wxBrush("WHITE", wxSOLID); |
| 71 | g_oglBlackForegroundPen = new wxPen("BLACK", 1, wxSOLID); |
| 72 | |
| 73 | OGLInitializeConstraintTypes(); |
| 74 | |
| 75 | // Initialize big buffer used when writing images |
| 76 | oglBuffer = new char[3000]; |
| 77 | |
| 78 | } |
| 79 | |
| 80 | void wxOGLCleanUp() |
| 81 | { |
| 82 | if (oglBuffer) |
| 83 | { |
| 84 | delete[] oglBuffer; |
| 85 | oglBuffer = NULL; |
| 86 | } |
| 87 | oglBuffer = NULL; |
| 88 | if (g_oglBullseyeCursor) |
| 89 | { |
| 90 | delete g_oglBullseyeCursor; |
| 91 | g_oglBullseyeCursor = NULL; |
| 92 | } |
| 93 | |
| 94 | if (g_oglNormalFont) |
| 95 | { |
| 96 | delete g_oglNormalFont; |
| 97 | g_oglNormalFont = NULL; |
| 98 | } |
| 99 | if (g_oglBlackPen) |
| 100 | { |
| 101 | delete g_oglBlackPen; |
| 102 | g_oglBlackPen = NULL; |
| 103 | } |
| 104 | if (g_oglWhiteBackgroundPen) |
| 105 | { |
| 106 | delete g_oglWhiteBackgroundPen; |
| 107 | g_oglWhiteBackgroundPen = NULL; |
| 108 | } |
| 109 | if (g_oglTransparentPen) |
| 110 | { |
| 111 | delete g_oglTransparentPen; |
| 112 | g_oglTransparentPen = NULL; |
| 113 | } |
| 114 | if (g_oglWhiteBackgroundBrush) |
| 115 | { |
| 116 | delete g_oglWhiteBackgroundBrush; |
| 117 | g_oglWhiteBackgroundBrush = NULL; |
| 118 | } |
| 119 | if (g_oglBlackForegroundPen) |
| 120 | { |
| 121 | delete g_oglBlackForegroundPen; |
| 122 | g_oglBlackForegroundPen = NULL; |
| 123 | } |
| 124 | |
| 125 | OGLCleanUpConstraintTypes(); |
| 126 | } |
| 127 | |
| 128 | wxFont *oglMatchFont(int point_size) |
| 129 | { |
| 130 | wxFont *font = wxTheFontList->FindOrCreateFont(point_size, wxSWISS, wxNORMAL, wxNORMAL); |
| 131 | #if 0 |
| 132 | switch (point_size) |
| 133 | { |
| 134 | case 4: |
| 135 | font = swiss_font_4; |
| 136 | break; |
| 137 | case 6: |
| 138 | font = swiss_font_6; |
| 139 | break; |
| 140 | case 8: |
| 141 | font = swiss_font_8; |
| 142 | break; |
| 143 | case 12: |
| 144 | font = swiss_font_12; |
| 145 | break; |
| 146 | case 14: |
| 147 | font = swiss_font_14; |
| 148 | break; |
| 149 | case 18: |
| 150 | font = swiss_font_18; |
| 151 | break; |
| 152 | case 24: |
| 153 | font = swiss_font_24; |
| 154 | break; |
| 155 | default: |
| 156 | case 10: |
| 157 | font = swiss_font_10; |
| 158 | break; |
| 159 | } |
| 160 | #endif |
| 161 | return font; |
| 162 | } |
| 163 | |
| 164 | int FontSizeDialog(wxFrame *parent, int old_size) |
| 165 | { |
| 166 | if (old_size <= 0) |
| 167 | old_size = 10; |
| 168 | char buf[40]; |
| 169 | sprintf(buf, "%d", old_size); |
| 170 | wxString ans = wxGetTextFromUser("Enter point size", "Font size", buf, parent); |
| 171 | if (ans == "") |
| 172 | return 0; |
| 173 | |
| 174 | int new_size = atoi(ans); |
| 175 | if ((new_size <= 0) || (new_size > 40)) |
| 176 | { |
| 177 | wxMessageBox("Invalid point size!", "Error", wxOK); |
| 178 | return 0; |
| 179 | } |
| 180 | return new_size; |
| 181 | /* |
| 182 | char *strings[8]; |
| 183 | strings[0] = "4"; |
| 184 | strings[1] = "6"; |
| 185 | strings[2] = "8"; |
| 186 | strings[3] = "10"; |
| 187 | strings[4] = "12"; |
| 188 | strings[5] = "14"; |
| 189 | strings[6] = "18"; |
| 190 | strings[7] = "24"; |
| 191 | char *ans = wxGetSingleChoice("Choose", "Choose a font size", 8, strings, parent); |
| 192 | if (ans) |
| 193 | { |
| 194 | int size; |
| 195 | sscanf(ans, "%d", &size); |
| 196 | return oglMatchFont(size); |
| 197 | } |
| 198 | else return NULL; |
| 199 | */ |
| 200 | } |
| 201 | |
| 202 | // Centre a list of strings in the given box. xOffset and yOffset are the |
| 203 | // the positions that these lines should be relative to, and this might be |
| 204 | // the same as m_xpos, m_ypos, but might be zero if formatting from left-justifying. |
| 205 | void oglCentreText(wxDC& dc, wxList *text_list, |
| 206 | double m_xpos, double m_ypos, double width, double height, |
| 207 | int formatMode) |
| 208 | { |
| 209 | int n = text_list->Number(); |
| 210 | |
| 211 | if (!text_list || (n == 0)) |
| 212 | return; |
| 213 | |
| 214 | // First, get maximum dimensions of box enclosing text |
| 215 | |
| 216 | long char_height = 0; |
| 217 | long max_width = 0; |
| 218 | long current_width = 0; |
| 219 | |
| 220 | // Store text extents for speed |
| 221 | double *widths = new double[n]; |
| 222 | |
| 223 | wxNode *current = text_list->First(); |
| 224 | int i = 0; |
| 225 | while (current) |
| 226 | { |
| 227 | wxShapeTextLine *line = (wxShapeTextLine *)current->Data(); |
| 228 | dc.GetTextExtent(line->GetText(), ¤t_width, &char_height); |
| 229 | widths[i] = current_width; |
| 230 | |
| 231 | if (current_width > max_width) |
| 232 | max_width = current_width; |
| 233 | current = current->Next(); |
| 234 | i ++; |
| 235 | } |
| 236 | |
| 237 | double max_height = n*char_height; |
| 238 | |
| 239 | double xoffset, yoffset, xOffset, yOffset; |
| 240 | |
| 241 | if (formatMode & FORMAT_CENTRE_VERT) |
| 242 | { |
| 243 | if (max_height < height) |
| 244 | yoffset = (double)(m_ypos - (height/2.0) + (height - max_height)/2.0); |
| 245 | else |
| 246 | yoffset = (double)(m_ypos - (height/2.0)); |
| 247 | yOffset = m_ypos; |
| 248 | } |
| 249 | else |
| 250 | { |
| 251 | yoffset = 0.0; |
| 252 | yOffset = 0.0; |
| 253 | } |
| 254 | |
| 255 | if (formatMode & FORMAT_CENTRE_HORIZ) |
| 256 | { |
| 257 | xoffset = (double)(m_xpos - width/2.0); |
| 258 | xOffset = m_xpos; |
| 259 | } |
| 260 | else |
| 261 | { |
| 262 | xoffset = 0.0; |
| 263 | xOffset = 0.0; |
| 264 | } |
| 265 | |
| 266 | current = text_list->First(); |
| 267 | i = 0; |
| 268 | |
| 269 | while (current) |
| 270 | { |
| 271 | wxShapeTextLine *line = (wxShapeTextLine *)current->Data(); |
| 272 | |
| 273 | double x; |
| 274 | if ((formatMode & FORMAT_CENTRE_HORIZ) && (widths[i] < width)) |
| 275 | x = (double)((width - widths[i])/2.0 + xoffset); |
| 276 | else |
| 277 | x = xoffset; |
| 278 | double y = (double)(i*char_height + yoffset); |
| 279 | |
| 280 | line->SetX( x - xOffset ); line->SetY( y - yOffset ); |
| 281 | current = current->Next(); |
| 282 | i ++; |
| 283 | } |
| 284 | |
| 285 | delete widths; |
| 286 | } |
| 287 | |
| 288 | // Centre a list of strings in the given box |
| 289 | void oglCentreTextNoClipping(wxDC& dc, wxList *text_list, |
| 290 | double m_xpos, double m_ypos, double width, double height) |
| 291 | { |
| 292 | int n = text_list->Number(); |
| 293 | |
| 294 | if (!text_list || (n == 0)) |
| 295 | return; |
| 296 | |
| 297 | // First, get maximum dimensions of box enclosing text |
| 298 | |
| 299 | long char_height = 0; |
| 300 | long max_width = 0; |
| 301 | long current_width = 0; |
| 302 | |
| 303 | // Store text extents for speed |
| 304 | double *widths = new double[n]; |
| 305 | |
| 306 | wxNode *current = text_list->First(); |
| 307 | int i = 0; |
| 308 | while (current) |
| 309 | { |
| 310 | wxShapeTextLine *line = (wxShapeTextLine *)current->Data(); |
| 311 | dc.GetTextExtent(line->GetText(), ¤t_width, &char_height); |
| 312 | widths[i] = current_width; |
| 313 | |
| 314 | if (current_width > max_width) |
| 315 | max_width = current_width; |
| 316 | current = current->Next(); |
| 317 | i ++; |
| 318 | } |
| 319 | |
| 320 | double max_height = n*char_height; |
| 321 | |
| 322 | double yoffset = (double)(m_ypos - (height/2.0) + (height - max_height)/2.0); |
| 323 | |
| 324 | double xoffset = (double)(m_xpos - width/2.0); |
| 325 | |
| 326 | current = text_list->First(); |
| 327 | i = 0; |
| 328 | |
| 329 | while (current) |
| 330 | { |
| 331 | wxShapeTextLine *line = (wxShapeTextLine *)current->Data(); |
| 332 | |
| 333 | double x = (double)((width - widths[i])/2.0 + xoffset); |
| 334 | double y = (double)(i*char_height + yoffset); |
| 335 | |
| 336 | line->SetX( x - m_xpos ); line->SetY( y - m_ypos ); |
| 337 | current = current->Next(); |
| 338 | i ++; |
| 339 | } |
| 340 | delete widths; |
| 341 | } |
| 342 | |
| 343 | void oglGetCentredTextExtent(wxDC& dc, wxList *text_list, |
| 344 | double m_xpos, double m_ypos, double width, double height, |
| 345 | double *actual_width, double *actual_height) |
| 346 | { |
| 347 | int n = text_list->Number(); |
| 348 | |
| 349 | if (!text_list || (n == 0)) |
| 350 | { |
| 351 | *actual_width = 0; |
| 352 | *actual_height = 0; |
| 353 | return; |
| 354 | } |
| 355 | |
| 356 | // First, get maximum dimensions of box enclosing text |
| 357 | |
| 358 | long char_height = 0; |
| 359 | long max_width = 0; |
| 360 | long current_width = 0; |
| 361 | |
| 362 | wxNode *current = text_list->First(); |
| 363 | int i = 0; |
| 364 | while (current) |
| 365 | { |
| 366 | wxShapeTextLine *line = (wxShapeTextLine *)current->Data(); |
| 367 | dc.GetTextExtent(line->GetText(), ¤t_width, &char_height); |
| 368 | |
| 369 | if (current_width > max_width) |
| 370 | max_width = current_width; |
| 371 | current = current->Next(); |
| 372 | i ++; |
| 373 | } |
| 374 | |
| 375 | *actual_height = n*char_height; |
| 376 | *actual_width = max_width; |
| 377 | } |
| 378 | |
| 379 | // Format a string to a list of strings that fit in the given box. |
| 380 | // Interpret %n and 10 or 13 as a new line. |
| 381 | wxStringList *oglFormatText(wxDC& dc, const wxString& text, double width, double height, int formatMode) |
| 382 | { |
| 383 | // First, parse the string into a list of words |
| 384 | wxStringList word_list; |
| 385 | |
| 386 | // Make new lines into NULL strings at this point |
| 387 | int i = 0; int j = 0; int len = strlen(text); |
| 388 | char word[200]; word[0] = 0; |
| 389 | bool end_word = FALSE; bool new_line = FALSE; |
| 390 | while (i < len) |
| 391 | { |
| 392 | switch (text[i]) |
| 393 | { |
| 394 | case '%': |
| 395 | { |
| 396 | i ++; |
| 397 | if (i == len) |
| 398 | { word[j] = '%'; j ++; } |
| 399 | else |
| 400 | { |
| 401 | if (text[i] == 'n') |
| 402 | { new_line = TRUE; end_word = TRUE; i++; } |
| 403 | else |
| 404 | { word[j] = '%'; j ++; word[j] = text[i]; j ++; i ++; } |
| 405 | } |
| 406 | break; |
| 407 | } |
| 408 | case 10: |
| 409 | { |
| 410 | new_line = TRUE; end_word = TRUE; i++; |
| 411 | break; |
| 412 | } |
| 413 | case 13: |
| 414 | { |
| 415 | new_line = TRUE; end_word = TRUE; i++; |
| 416 | } |
| 417 | case ' ': |
| 418 | { |
| 419 | end_word = TRUE; |
| 420 | i ++; |
| 421 | break; |
| 422 | } |
| 423 | default: |
| 424 | { |
| 425 | word[j] = text[i]; |
| 426 | j ++; i ++; |
| 427 | break; |
| 428 | } |
| 429 | } |
| 430 | if (i == len) end_word = TRUE; |
| 431 | if (end_word) |
| 432 | { |
| 433 | word[j] = 0; |
| 434 | j = 0; |
| 435 | word_list.Add(word); |
| 436 | end_word = FALSE; |
| 437 | } |
| 438 | if (new_line) |
| 439 | { |
| 440 | word_list.Append(NULL); |
| 441 | new_line = FALSE; |
| 442 | } |
| 443 | } |
| 444 | // Now, make a list of strings which can fit in the box |
| 445 | wxStringList *string_list = new wxStringList; |
| 446 | |
| 447 | char buffer[400]; |
| 448 | buffer[0] = 0; |
| 449 | wxNode *node = word_list.First(); |
| 450 | long x, y; |
| 451 | |
| 452 | while (node) |
| 453 | { |
| 454 | wxString oldBuffer(buffer); |
| 455 | |
| 456 | char *s = (char *)node->Data(); |
| 457 | if (!s) |
| 458 | { |
| 459 | // FORCE NEW LINE |
| 460 | if (strlen(buffer) > 0) |
| 461 | string_list->Add(buffer); |
| 462 | |
| 463 | buffer[0] = 0; |
| 464 | } |
| 465 | else |
| 466 | { |
| 467 | if (buffer[0] != 0) |
| 468 | strcat(buffer, " "); |
| 469 | |
| 470 | strcat(buffer, s); |
| 471 | dc.GetTextExtent(buffer, &x, &y); |
| 472 | |
| 473 | // Don't fit within the bounding box if we're fitting shape to contents |
| 474 | if ((x > width) && !(formatMode & FORMAT_SIZE_TO_CONTENTS)) |
| 475 | { |
| 476 | // Deal with first word being wider than box |
| 477 | if (oldBuffer.Length() > 0) |
| 478 | string_list->Add(oldBuffer); |
| 479 | |
| 480 | buffer[0] = 0; |
| 481 | strcat(buffer, s); |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | node = node->Next(); |
| 486 | } |
| 487 | if (buffer[0] != 0) |
| 488 | string_list->Add(buffer); |
| 489 | |
| 490 | return string_list; |
| 491 | } |
| 492 | |
| 493 | void oglDrawFormattedText(wxDC& dc, wxList *text_list, |
| 494 | double m_xpos, double m_ypos, double width, double height, |
| 495 | int formatMode) |
| 496 | { |
| 497 | double xoffset, yoffset; |
| 498 | if (formatMode & FORMAT_CENTRE_HORIZ) |
| 499 | xoffset = m_xpos; |
| 500 | else |
| 501 | xoffset = (double)(m_xpos - (width / 2.0)); |
| 502 | |
| 503 | if (formatMode & FORMAT_CENTRE_VERT) |
| 504 | yoffset = m_ypos; |
| 505 | else |
| 506 | yoffset = (double)(m_ypos - (height / 2.0)); |
| 507 | |
| 508 | dc.SetClippingRegion( |
| 509 | (long)(m_xpos - width/2.0), (long)(m_ypos - height/2.0), |
| 510 | (long)width, (long)height); |
| 511 | |
| 512 | wxNode *current = text_list->First(); |
| 513 | while (current) |
| 514 | { |
| 515 | wxShapeTextLine *line = (wxShapeTextLine *)current->Data(); |
| 516 | |
| 517 | dc.DrawText(line->GetText(), WXROUND(xoffset + line->GetX()), WXROUND(yoffset + line->GetY())); |
| 518 | current = current->Next(); |
| 519 | } |
| 520 | |
| 521 | dc.DestroyClippingRegion(); |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * Find centroid given list of points comprising polyline |
| 526 | * |
| 527 | */ |
| 528 | |
| 529 | void oglFindPolylineCentroid(wxList *points, double *x, double *y) |
| 530 | { |
| 531 | double xcount = 0; |
| 532 | double ycount = 0; |
| 533 | |
| 534 | wxNode *node = points->First(); |
| 535 | while (node) |
| 536 | { |
| 537 | wxRealPoint *point = (wxRealPoint *)node->Data(); |
| 538 | xcount += point->x; |
| 539 | ycount += point->y; |
| 540 | node = node->Next(); |
| 541 | } |
| 542 | |
| 543 | *x = (xcount/points->Number()); |
| 544 | *y = (ycount/points->Number()); |
| 545 | } |
| 546 | |
| 547 | /* |
| 548 | * Check that (x1, y1) -> (x2, y2) hits (x3, y3) -> (x4, y4). |
| 549 | * If so, ratio1 gives the proportion along the first line |
| 550 | * that the intersection occurs (or something like that). |
| 551 | * Used by functions below. |
| 552 | * |
| 553 | */ |
| 554 | void oglCheckLineIntersection(double x1, double y1, double x2, double y2, |
| 555 | double x3, double y3, double x4, double y4, |
| 556 | double *ratio1, double *ratio2) |
| 557 | { |
| 558 | double denominator_term = (y4 - y3)*(x2 - x1) - (y2 - y1)*(x4 - x3); |
| 559 | double numerator_term = (x3 - x1)*(y4 - y3) + (x4 - x3)*(y1 - y3); |
| 560 | |
| 561 | double line_constant; |
| 562 | double length_ratio = 1.0; |
| 563 | double k_line = 1.0; |
| 564 | |
| 565 | // Check for parallel lines |
| 566 | if ((denominator_term < 0.005) && (denominator_term > -0.005)) |
| 567 | line_constant = -1.0; |
| 568 | else |
| 569 | line_constant = numerator_term/denominator_term; |
| 570 | |
| 571 | // Check for intersection |
| 572 | if ((line_constant < 1.0) && (line_constant > 0.0)) |
| 573 | { |
| 574 | // Now must check that other line hits |
| 575 | if (((y4 - y3) < 0.005) && ((y4 - y3) > -0.005)) |
| 576 | k_line = ((x1 - x3) + line_constant*(x2 - x1))/(x4 - x3); |
| 577 | else |
| 578 | k_line = ((y1 - y3) + line_constant*(y2 - y1))/(y4 - y3); |
| 579 | |
| 580 | if ((k_line >= 0.0) && (k_line < 1.0)) |
| 581 | length_ratio = line_constant; |
| 582 | else |
| 583 | k_line = 1.0; |
| 584 | } |
| 585 | *ratio1 = length_ratio; |
| 586 | *ratio2 = k_line; |
| 587 | } |
| 588 | |
| 589 | /* |
| 590 | * Find where (x1, y1) -> (x2, y2) hits one of the lines in xvec, yvec. |
| 591 | * (*x3, *y3) is the point where it hits. |
| 592 | * |
| 593 | */ |
| 594 | void oglFindEndForPolyline(double n, double xvec[], double yvec[], |
| 595 | double x1, double y1, double x2, double y2, double *x3, double *y3) |
| 596 | { |
| 597 | int i; |
| 598 | double lastx = xvec[0]; |
| 599 | double lasty = yvec[0]; |
| 600 | |
| 601 | double min_ratio = 1.0; |
| 602 | double line_ratio; |
| 603 | double other_ratio; |
| 604 | |
| 605 | for (i = 1; i < n; i++) |
| 606 | { |
| 607 | oglCheckLineIntersection(x1, y1, x2, y2, lastx, lasty, xvec[i], yvec[i], |
| 608 | &line_ratio, &other_ratio); |
| 609 | lastx = xvec[i]; |
| 610 | lasty = yvec[i]; |
| 611 | |
| 612 | if (line_ratio < min_ratio) |
| 613 | min_ratio = line_ratio; |
| 614 | } |
| 615 | |
| 616 | // Do last (implicit) line if last and first doubles are not identical |
| 617 | if (!(xvec[0] == lastx && yvec[0] == lasty)) |
| 618 | { |
| 619 | oglCheckLineIntersection(x1, y1, x2, y2, lastx, lasty, xvec[0], yvec[0], |
| 620 | &line_ratio, &other_ratio); |
| 621 | |
| 622 | if (line_ratio < min_ratio) |
| 623 | min_ratio = line_ratio; |
| 624 | } |
| 625 | |
| 626 | *x3 = (x1 + (x2 - x1)*min_ratio); |
| 627 | *y3 = (y1 + (y2 - y1)*min_ratio); |
| 628 | |
| 629 | } |
| 630 | |
| 631 | /* |
| 632 | * Find where the line hits the box. |
| 633 | * |
| 634 | */ |
| 635 | |
| 636 | void oglFindEndForBox(double width, double height, |
| 637 | double x1, double y1, // Centre of box (possibly) |
| 638 | double x2, double y2, // other end of line |
| 639 | double *x3, double *y3) // End on box edge |
| 640 | { |
| 641 | double xvec[5]; |
| 642 | double yvec[5]; |
| 643 | |
| 644 | xvec[0] = (double)(x1 - width/2.0); |
| 645 | yvec[0] = (double)(y1 - height/2.0); |
| 646 | xvec[1] = (double)(x1 - width/2.0); |
| 647 | yvec[1] = (double)(y1 + height/2.0); |
| 648 | xvec[2] = (double)(x1 + width/2.0); |
| 649 | yvec[2] = (double)(y1 + height/2.0); |
| 650 | xvec[3] = (double)(x1 + width/2.0); |
| 651 | yvec[3] = (double)(y1 - height/2.0); |
| 652 | xvec[4] = (double)(x1 - width/2.0); |
| 653 | yvec[4] = (double)(y1 - height/2.0); |
| 654 | |
| 655 | oglFindEndForPolyline(5, xvec, yvec, x2, y2, x1, y1, x3, y3); |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * Find where the line hits the circle. |
| 660 | * |
| 661 | */ |
| 662 | |
| 663 | void oglFindEndForCircle(double radius, |
| 664 | double x1, double y1, // Centre of circle |
| 665 | double x2, double y2, // Other end of line |
| 666 | double *x3, double *y3) |
| 667 | { |
| 668 | double H = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1)); |
| 669 | |
| 670 | if (H == 0.0) |
| 671 | { |
| 672 | *x3 = x1; |
| 673 | *y3 = y1; |
| 674 | } |
| 675 | else |
| 676 | { |
| 677 | *y3 = radius * (y2 - y1)/H + y1; |
| 678 | *x3 = radius * (x2 - x1)/H + x1; |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | /* |
| 683 | * Given the line (x1, y1) -> (x2, y2), and an arrow size of given length and width, |
| 684 | * return the position of the tip of the arrow and the left and right vertices of the arrow. |
| 685 | * |
| 686 | */ |
| 687 | |
| 688 | void oglGetArrowPoints(double x1, double y1, double x2, double y2, |
| 689 | double length, double width, |
| 690 | double *tip_x, double *tip_y, |
| 691 | double *side1_x, double *side1_y, |
| 692 | double *side2_x, double *side2_y) |
| 693 | { |
| 694 | double l = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1)); |
| 695 | |
| 696 | if (l < 0.01) |
| 697 | l = (double) 0.01; |
| 698 | |
| 699 | double i_bar = (x2 - x1)/l; |
| 700 | double j_bar = (y2 - y1)/l; |
| 701 | |
| 702 | double x3 = (- length*i_bar) + x2; |
| 703 | double y3 = (- length*j_bar) + y2; |
| 704 | |
| 705 | *side1_x = width*(-j_bar) + x3; |
| 706 | *side1_y = width*i_bar + y3; |
| 707 | |
| 708 | *side2_x = -width*(-j_bar) + x3; |
| 709 | *side2_y = -width*i_bar + y3; |
| 710 | |
| 711 | *tip_x = x2; *tip_y = y2; |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * Given an ellipse and endpoints of a line, returns the point at which |
| 716 | * the line touches the ellipse in values x4, y4. |
| 717 | * This function assumes that the centre of the ellipse is at x1, y1, and the |
| 718 | * ellipse has a width of width1 and a height of height1. It also assumes you are |
| 719 | * wanting to draw an arc FROM point x2, y2 TOWARDS point x3, y3. |
| 720 | * This function calculates the x,y coordinates of the intersection point of |
| 721 | * the arc with the ellipse. |
| 722 | * Author: Ian Harrison |
| 723 | */ |
| 724 | |
| 725 | void oglDrawArcToEllipse(double x1, double y1, double width1, double height1, double x2, double y2, double x3, double y3, |
| 726 | double *x4, double *y4) |
| 727 | { |
| 728 | double a1 = (double)(width1/2.0); |
| 729 | double b1 = (double)(height1/2.0); |
| 730 | |
| 731 | // These are required to give top left x and y coordinates for DrawEllipse |
| 732 | // double top_left_x1 = (double)(x1 - a1); |
| 733 | // double top_left_y1 = (double)(y1 - b1); |
| 734 | /* |
| 735 | // Check for vertical line |
| 736 | if (fabs(x2 - x3) < 0.05) |
| 737 | { |
| 738 | *x4 = x3; |
| 739 | if (y2 < y3) |
| 740 | *y4 = (double)(y1 - b1); |
| 741 | else |
| 742 | *y4 = (double)(y1 + b1); |
| 743 | return; |
| 744 | } |
| 745 | */ |
| 746 | // Check that x2 != x3 |
| 747 | if (fabs(x2 - x3) < 0.05) |
| 748 | { |
| 749 | *x4 = x2; |
| 750 | if (y3 > y2) |
| 751 | *y4 = (double)(y1 - sqrt((b1*b1 - (((x2-x1)*(x2-x1))*(b1*b1)/(a1*a1))))); |
| 752 | else |
| 753 | *y4 = (double)(y1 + sqrt((b1*b1 - (((x2-x1)*(x2-x1))*(b1*b1)/(a1*a1))))); |
| 754 | return; |
| 755 | } |
| 756 | |
| 757 | // Calculate the x and y coordinates of the point where arc intersects ellipse |
| 758 | |
| 759 | double A, B, C, D, E, F, G, H, K; |
| 760 | double ellipse1_x, ellipse1_y; |
| 761 | |
| 762 | A = (double)(1/(a1 * a1)); |
| 763 | B = (double)((y3 - y2) * (y3 - y2)) / ((x3 - x2) * (x3 - x2) * b1 * b1); |
| 764 | C = (double)(2 * (y3 - y2) * (y2 - y1)) / ((x3 - x2) * b1 * b1); |
| 765 | D = (double)((y2 - y1) * (y2 - y1)) / (b1 * b1); |
| 766 | E = (double)(A + B); |
| 767 | F = (double)(C - (2 * A * x1) - (2 * B * x2)); |
| 768 | G = (double)((A * x1 * x1) + (B * x2 * x2) - (C * x2) + D - 1); |
| 769 | H = (double)((y3 - y2) / (x3 - x2)); |
| 770 | K = (double)((F * F) - (4 * E * G)); |
| 771 | |
| 772 | if (K >= 0) |
| 773 | // In this case the line intersects the ellipse, so calculate intersection |
| 774 | { |
| 775 | if(x2 >= x1) |
| 776 | { |
| 777 | ellipse1_x = (double)(((F * -1) + sqrt(K)) / (2 * E)); |
| 778 | ellipse1_y = (double)((H * (ellipse1_x - x2)) + y2); |
| 779 | } |
| 780 | else |
| 781 | { |
| 782 | ellipse1_x = (double)(((F * -1) - sqrt(K)) / (2 * E)); |
| 783 | ellipse1_y = (double)((H * (ellipse1_x - x2)) + y2); |
| 784 | } |
| 785 | } |
| 786 | else |
| 787 | // in this case, arc does not intersect ellipse, so just draw arc |
| 788 | { |
| 789 | ellipse1_x = x3; |
| 790 | ellipse1_y = y3; |
| 791 | } |
| 792 | *x4 = ellipse1_x; |
| 793 | *y4 = ellipse1_y; |
| 794 | |
| 795 | /* |
| 796 | // Draw a little circle (radius = 2) at the end of the arc where it hits |
| 797 | // the ellipse . |
| 798 | |
| 799 | double circle_x = ellipse1_x - 2.0; |
| 800 | double circle_y = ellipse1_y - 2.0; |
| 801 | m_canvas->DrawEllipse(circle_x, circle_y, 4.0, 4.0); |
| 802 | */ |
| 803 | } |
| 804 | |
| 805 | // Update a list item from a list of strings |
| 806 | void UpdateListBox(wxListBox *item, wxList *list) |
| 807 | { |
| 808 | item->Clear(); |
| 809 | if (!list) |
| 810 | return; |
| 811 | |
| 812 | wxNode *node = list->First(); |
| 813 | while (node) |
| 814 | { |
| 815 | char *s = (char *)node->Data(); |
| 816 | item->Append(s); |
| 817 | node = node->Next(); |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | bool oglRoughlyEqual(double val1, double val2, double tol) |
| 822 | { |
| 823 | return ( (val1 < (val2 + tol)) && (val1 > (val2 - tol)) && |
| 824 | (val2 < (val1 + tol)) && (val2 > (val1 - tol))); |
| 825 | } |
| 826 | |
| 827 | /* |
| 828 | * Hex<->Dec conversion |
| 829 | */ |
| 830 | |
| 831 | // Array used in DecToHex conversion routine. |
| 832 | static char sg_HexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', |
| 833 | 'C', 'D', 'E', 'F' }; |
| 834 | |
| 835 | // Convert 2-digit hex number to decimal |
| 836 | unsigned int oglHexToDec(char* buf) |
| 837 | { |
| 838 | int firstDigit, secondDigit; |
| 839 | |
| 840 | if (buf[0] >= 'A') |
| 841 | firstDigit = buf[0] - 'A' + 10; |
| 842 | else |
| 843 | firstDigit = buf[0] - '0'; |
| 844 | |
| 845 | if (buf[1] >= 'A') |
| 846 | secondDigit = buf[1] - 'A' + 10; |
| 847 | else |
| 848 | secondDigit = buf[1] - '0'; |
| 849 | |
| 850 | return firstDigit * 16 + secondDigit; |
| 851 | } |
| 852 | |
| 853 | // Convert decimal integer to 2-character hex string |
| 854 | void oglDecToHex(unsigned int dec, char *buf) |
| 855 | { |
| 856 | int firstDigit = (int)(dec/16.0); |
| 857 | int secondDigit = (int)(dec - (firstDigit*16.0)); |
| 858 | buf[0] = sg_HexArray[firstDigit]; |
| 859 | buf[1] = sg_HexArray[secondDigit]; |
| 860 | buf[2] = 0; |
| 861 | } |
| 862 | |
| 863 | // 3-digit hex to wxColour |
| 864 | wxColour oglHexToColour(const wxString& hex) |
| 865 | { |
| 866 | if (hex.Length() == 6) |
| 867 | { |
| 868 | char buf[7]; |
| 869 | strncpy(buf, hex, 7); |
| 870 | unsigned int r = oglHexToDec((char *)buf); |
| 871 | unsigned int g = oglHexToDec((char *)(buf+2)); |
| 872 | unsigned int b = oglHexToDec((char *)(buf+4)); |
| 873 | return wxColour(r, g, b); |
| 874 | } |
| 875 | else |
| 876 | return wxColour(0,0,0); |
| 877 | } |
| 878 | |
| 879 | // RGB to 3-digit hex |
| 880 | wxString oglColourToHex(const wxColour& colour) |
| 881 | { |
| 882 | char buf[7]; |
| 883 | unsigned int red = colour.Red(); |
| 884 | unsigned int green = colour.Green(); |
| 885 | unsigned int blue = colour.Blue(); |
| 886 | |
| 887 | oglDecToHex(red, buf); |
| 888 | oglDecToHex(green, buf+2); |
| 889 | oglDecToHex(blue, buf+4); |
| 890 | |
| 891 | return wxString(buf); |
| 892 | } |
| 893 | |
| 894 | |