--- /dev/null
+/////////////////////////////////////////////////////////////////////////////
+// Name: misc.cpp
+// Purpose: Miscellaneous OGL support functions
+// Author: Julian Smart
+// Modified by:
+// Created: 12/07/98
+// RCS-ID: $Id$
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifdef __GNUG__
+#pragma implementation "misc.h"
+#endif
+
+// For compilers that support precompilation, includes "wx.h".
+#include <wx/wxprec.h>
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#include <wx/wx.h>
+#endif
+
+#include <wx/wxexpr.h>
+
+#include <wx/types.h>
+
+#if wxUSE_IOSTREAMH
+#include <iostream.h>
+#else
+#include <iostream>
+#endif
+#include <ctype.h>
+#include <math.h>
+#include <stdlib.h>
+
+#include <wx/ogl/basic.h>
+#include <wx/ogl/basicp.h>
+#include <wx/ogl/misc.h>
+#include <wx/ogl/constrnt.h>
+#include <wx/ogl/composit.h>
+
+wxFont* g_oglNormalFont;
+wxPen* g_oglBlackPen;
+wxPen* g_oglWhiteBackgroundPen;
+wxPen* g_oglTransparentPen;
+wxBrush* g_oglWhiteBackgroundBrush;
+wxPen* g_oglBlackForegroundPen;
+wxCursor* g_oglBullseyeCursor = NULL;
+
+char* oglBuffer = NULL;
+
+wxList oglObjectCopyMapping(wxKEY_INTEGER);
+
+
+
+void wxOGLInitialize()
+{
+ g_oglBullseyeCursor = new wxCursor(wxCURSOR_BULLSEYE);
+
+ g_oglNormalFont = new wxFont(10, wxSWISS, wxNORMAL, wxNORMAL);
+
+ g_oglBlackPen = new wxPen("BLACK", 1, wxSOLID);
+
+ g_oglWhiteBackgroundPen = new wxPen("WHITE", 1, wxSOLID);
+ g_oglTransparentPen = new wxPen("WHITE", 1, wxTRANSPARENT);
+ g_oglWhiteBackgroundBrush = new wxBrush("WHITE", wxSOLID);
+ g_oglBlackForegroundPen = new wxPen("BLACK", 1, wxSOLID);
+
+ OGLInitializeConstraintTypes();
+
+ // Initialize big buffer used when writing images
+ oglBuffer = new char[3000];
+
+}
+
+void wxOGLCleanUp()
+{
+ if (oglBuffer)
+ {
+ delete[] oglBuffer;
+ oglBuffer = NULL;
+ }
+ oglBuffer = NULL;
+ if (g_oglBullseyeCursor)
+ {
+ delete g_oglBullseyeCursor;
+ g_oglBullseyeCursor = NULL;
+ }
+
+ if (g_oglNormalFont)
+ {
+ delete g_oglNormalFont;
+ g_oglNormalFont = NULL;
+ }
+ if (g_oglBlackPen)
+ {
+ delete g_oglBlackPen;
+ g_oglBlackPen = NULL;
+ }
+ if (g_oglWhiteBackgroundPen)
+ {
+ delete g_oglWhiteBackgroundPen;
+ g_oglWhiteBackgroundPen = NULL;
+ }
+ if (g_oglTransparentPen)
+ {
+ delete g_oglTransparentPen;
+ g_oglTransparentPen = NULL;
+ }
+ if (g_oglWhiteBackgroundBrush)
+ {
+ delete g_oglWhiteBackgroundBrush;
+ g_oglWhiteBackgroundBrush = NULL;
+ }
+ if (g_oglBlackForegroundPen)
+ {
+ delete g_oglBlackForegroundPen;
+ g_oglBlackForegroundPen = NULL;
+ }
+
+ OGLCleanUpConstraintTypes();
+}
+
+wxFont *oglMatchFont(int point_size)
+{
+ wxFont *font = wxTheFontList->FindOrCreateFont(point_size, wxSWISS, wxNORMAL, wxNORMAL);
+#if 0
+ switch (point_size)
+ {
+ case 4:
+ font = swiss_font_4;
+ break;
+ case 6:
+ font = swiss_font_6;
+ break;
+ case 8:
+ font = swiss_font_8;
+ break;
+ case 12:
+ font = swiss_font_12;
+ break;
+ case 14:
+ font = swiss_font_14;
+ break;
+ case 18:
+ font = swiss_font_18;
+ break;
+ case 24:
+ font = swiss_font_24;
+ break;
+ default:
+ case 10:
+ font = swiss_font_10;
+ break;
+ }
+#endif
+ return font;
+}
+
+int FontSizeDialog(wxFrame *parent, int old_size)
+{
+ if (old_size <= 0)
+ old_size = 10;
+ char buf[40];
+ sprintf(buf, "%d", old_size);
+ wxString ans = wxGetTextFromUser("Enter point size", "Font size", buf, parent);
+ if (ans == "")
+ return 0;
+
+ int new_size = atoi(ans);
+ if ((new_size <= 0) || (new_size > 40))
+ {
+ wxMessageBox("Invalid point size!", "Error", wxOK);
+ return 0;
+ }
+ return new_size;
+/*
+ char *strings[8];
+ strings[0] = "4";
+ strings[1] = "6";
+ strings[2] = "8";
+ strings[3] = "10";
+ strings[4] = "12";
+ strings[5] = "14";
+ strings[6] = "18";
+ strings[7] = "24";
+ char *ans = wxGetSingleChoice("Choose", "Choose a font size", 8, strings, parent);
+ if (ans)
+ {
+ int size;
+ sscanf(ans, "%d", &size);
+ return oglMatchFont(size);
+ }
+ else return NULL;
+*/
+}
+
+// Centre a list of strings in the given box. xOffset and yOffset are the
+// the positions that these lines should be relative to, and this might be
+// the same as m_xpos, m_ypos, but might be zero if formatting from left-justifying.
+void oglCentreText(wxDC& dc, wxList *text_list,
+ double m_xpos, double m_ypos, double width, double height,
+ int formatMode)
+{
+ int n = text_list->Number();
+
+ if (!text_list || (n == 0))
+ return;
+
+ // First, get maximum dimensions of box enclosing text
+
+ long char_height = 0;
+ long max_width = 0;
+ long current_width = 0;
+
+ // Store text extents for speed
+ double *widths = new double[n];
+
+ wxNode *current = text_list->First();
+ int i = 0;
+ while (current)
+ {
+ wxShapeTextLine *line = (wxShapeTextLine *)current->Data();
+ dc.GetTextExtent(line->GetText(), ¤t_width, &char_height);
+ widths[i] = current_width;
+
+ if (current_width > max_width)
+ max_width = current_width;
+ current = current->Next();
+ i ++;
+ }
+
+ double max_height = n*char_height;
+
+ double xoffset, yoffset, xOffset, yOffset;
+
+ if (formatMode & FORMAT_CENTRE_VERT)
+ {
+ if (max_height < height)
+ yoffset = (double)(m_ypos - (height/2.0) + (height - max_height)/2.0);
+ else
+ yoffset = (double)(m_ypos - (height/2.0));
+ yOffset = m_ypos;
+ }
+ else
+ {
+ yoffset = 0.0;
+ yOffset = 0.0;
+ }
+
+ if (formatMode & FORMAT_CENTRE_HORIZ)
+ {
+ xoffset = (double)(m_xpos - width/2.0);
+ xOffset = m_xpos;
+ }
+ else
+ {
+ xoffset = 0.0;
+ xOffset = 0.0;
+ }
+
+ current = text_list->First();
+ i = 0;
+
+ while (current)
+ {
+ wxShapeTextLine *line = (wxShapeTextLine *)current->Data();
+
+ double x;
+ if ((formatMode & FORMAT_CENTRE_HORIZ) && (widths[i] < width))
+ x = (double)((width - widths[i])/2.0 + xoffset);
+ else
+ x = xoffset;
+ double y = (double)(i*char_height + yoffset);
+
+ line->SetX( x - xOffset ); line->SetY( y - yOffset );
+ current = current->Next();
+ i ++;
+ }
+
+ delete widths;
+}
+
+// Centre a list of strings in the given box
+void oglCentreTextNoClipping(wxDC& dc, wxList *text_list,
+ double m_xpos, double m_ypos, double width, double height)
+{
+ int n = text_list->Number();
+
+ if (!text_list || (n == 0))
+ return;
+
+ // First, get maximum dimensions of box enclosing text
+
+ long char_height = 0;
+ long max_width = 0;
+ long current_width = 0;
+
+ // Store text extents for speed
+ double *widths = new double[n];
+
+ wxNode *current = text_list->First();
+ int i = 0;
+ while (current)
+ {
+ wxShapeTextLine *line = (wxShapeTextLine *)current->Data();
+ dc.GetTextExtent(line->GetText(), ¤t_width, &char_height);
+ widths[i] = current_width;
+
+ if (current_width > max_width)
+ max_width = current_width;
+ current = current->Next();
+ i ++;
+ }
+
+ double max_height = n*char_height;
+
+ double yoffset = (double)(m_ypos - (height/2.0) + (height - max_height)/2.0);
+
+ double xoffset = (double)(m_xpos - width/2.0);
+
+ current = text_list->First();
+ i = 0;
+
+ while (current)
+ {
+ wxShapeTextLine *line = (wxShapeTextLine *)current->Data();
+
+ double x = (double)((width - widths[i])/2.0 + xoffset);
+ double y = (double)(i*char_height + yoffset);
+
+ line->SetX( x - m_xpos ); line->SetY( y - m_ypos );
+ current = current->Next();
+ i ++;
+ }
+ delete widths;
+}
+
+void oglGetCentredTextExtent(wxDC& dc, wxList *text_list,
+ double m_xpos, double m_ypos, double width, double height,
+ double *actual_width, double *actual_height)
+{
+ int n = text_list->Number();
+
+ if (!text_list || (n == 0))
+ {
+ *actual_width = 0;
+ *actual_height = 0;
+ return;
+ }
+
+ // First, get maximum dimensions of box enclosing text
+
+ long char_height = 0;
+ long max_width = 0;
+ long current_width = 0;
+
+ wxNode *current = text_list->First();
+ int i = 0;
+ while (current)
+ {
+ wxShapeTextLine *line = (wxShapeTextLine *)current->Data();
+ dc.GetTextExtent(line->GetText(), ¤t_width, &char_height);
+
+ if (current_width > max_width)
+ max_width = current_width;
+ current = current->Next();
+ i ++;
+ }
+
+ *actual_height = n*char_height;
+ *actual_width = max_width;
+}
+
+// Format a string to a list of strings that fit in the given box.
+// Interpret %n and 10 or 13 as a new line.
+wxStringList *oglFormatText(wxDC& dc, const wxString& text, double width, double height, int formatMode)
+{
+ // First, parse the string into a list of words
+ wxStringList word_list;
+
+ // Make new lines into NULL strings at this point
+ int i = 0; int j = 0; int len = strlen(text);
+ char word[200]; word[0] = 0;
+ bool end_word = FALSE; bool new_line = FALSE;
+ while (i < len)
+ {
+ switch (text[i])
+ {
+ case '%':
+ {
+ i ++;
+ if (i == len)
+ { word[j] = '%'; j ++; }
+ else
+ {
+ if (text[i] == 'n')
+ { new_line = TRUE; end_word = TRUE; i++; }
+ else
+ { word[j] = '%'; j ++; word[j] = text[i]; j ++; i ++; }
+ }
+ break;
+ }
+ case 10:
+ {
+ new_line = TRUE; end_word = TRUE; i++;
+ break;
+ }
+ case 13:
+ {
+ new_line = TRUE; end_word = TRUE; i++;
+ }
+ case ' ':
+ {
+ end_word = TRUE;
+ i ++;
+ break;
+ }
+ default:
+ {
+ word[j] = text[i];
+ j ++; i ++;
+ break;
+ }
+ }
+ if (i == len) end_word = TRUE;
+ if (end_word)
+ {
+ word[j] = 0;
+ j = 0;
+ word_list.Add(word);
+ end_word = FALSE;
+ }
+ if (new_line)
+ {
+ word_list.Append(NULL);
+ new_line = FALSE;
+ }
+ }
+ // Now, make a list of strings which can fit in the box
+ wxStringList *string_list = new wxStringList;
+
+ char buffer[400];
+ buffer[0] = 0;
+ wxNode *node = word_list.First();
+ long x, y;
+
+ while (node)
+ {
+ wxString oldBuffer(buffer);
+
+ char *s = (char *)node->Data();
+ if (!s)
+ {
+ // FORCE NEW LINE
+ if (strlen(buffer) > 0)
+ string_list->Add(buffer);
+
+ buffer[0] = 0;
+ }
+ else
+ {
+ if (buffer[0] != 0)
+ strcat(buffer, " ");
+
+ strcat(buffer, s);
+ dc.GetTextExtent(buffer, &x, &y);
+
+ // Don't fit within the bounding box if we're fitting shape to contents
+ if ((x > width) && !(formatMode & FORMAT_SIZE_TO_CONTENTS))
+ {
+ // Deal with first word being wider than box
+ if (oldBuffer.Length() > 0)
+ string_list->Add(oldBuffer);
+
+ buffer[0] = 0;
+ strcat(buffer, s);
+ }
+ }
+
+ node = node->Next();
+ }
+ if (buffer[0] != 0)
+ string_list->Add(buffer);
+
+ return string_list;
+}
+
+void oglDrawFormattedText(wxDC& dc, wxList *text_list,
+ double m_xpos, double m_ypos, double width, double height,
+ int formatMode)
+{
+ double xoffset, yoffset;
+ if (formatMode & FORMAT_CENTRE_HORIZ)
+ xoffset = m_xpos;
+ else
+ xoffset = (double)(m_xpos - (width / 2.0));
+
+ if (formatMode & FORMAT_CENTRE_VERT)
+ yoffset = m_ypos;
+ else
+ yoffset = (double)(m_ypos - (height / 2.0));
+
+ dc.SetClippingRegion(
+ (long)(m_xpos - width/2.0), (long)(m_ypos - height/2.0),
+ (long)width, (long)height);
+
+ wxNode *current = text_list->First();
+ while (current)
+ {
+ wxShapeTextLine *line = (wxShapeTextLine *)current->Data();
+
+ dc.DrawText(line->GetText(), WXROUND(xoffset + line->GetX()), WXROUND(yoffset + line->GetY()));
+ current = current->Next();
+ }
+
+ dc.DestroyClippingRegion();
+}
+
+/*
+ * Find centroid given list of points comprising polyline
+ *
+ */
+
+void oglFindPolylineCentroid(wxList *points, double *x, double *y)
+{
+ double xcount = 0;
+ double ycount = 0;
+
+ wxNode *node = points->First();
+ while (node)
+ {
+ wxRealPoint *point = (wxRealPoint *)node->Data();
+ xcount += point->x;
+ ycount += point->y;
+ node = node->Next();
+ }
+
+ *x = (xcount/points->Number());
+ *y = (ycount/points->Number());
+}
+
+/*
+ * Check that (x1, y1) -> (x2, y2) hits (x3, y3) -> (x4, y4).
+ * If so, ratio1 gives the proportion along the first line
+ * that the intersection occurs (or something like that).
+ * Used by functions below.
+ *
+ */
+void oglCheckLineIntersection(double x1, double y1, double x2, double y2,
+ double x3, double y3, double x4, double y4,
+ double *ratio1, double *ratio2)
+{
+ double denominator_term = (y4 - y3)*(x2 - x1) - (y2 - y1)*(x4 - x3);
+ double numerator_term = (x3 - x1)*(y4 - y3) + (x4 - x3)*(y1 - y3);
+
+ double line_constant;
+ double length_ratio = 1.0;
+ double k_line = 1.0;
+
+ // Check for parallel lines
+ if ((denominator_term < 0.005) && (denominator_term > -0.005))
+ line_constant = -1.0;
+ else
+ line_constant = numerator_term/denominator_term;
+
+ // Check for intersection
+ if ((line_constant < 1.0) && (line_constant > 0.0))
+ {
+ // Now must check that other line hits
+ if (((y4 - y3) < 0.005) && ((y4 - y3) > -0.005))
+ k_line = ((x1 - x3) + line_constant*(x2 - x1))/(x4 - x3);
+ else
+ k_line = ((y1 - y3) + line_constant*(y2 - y1))/(y4 - y3);
+
+ if ((k_line >= 0.0) && (k_line < 1.0))
+ length_ratio = line_constant;
+ else
+ k_line = 1.0;
+ }
+ *ratio1 = length_ratio;
+ *ratio2 = k_line;
+}
+
+/*
+ * Find where (x1, y1) -> (x2, y2) hits one of the lines in xvec, yvec.
+ * (*x3, *y3) is the point where it hits.
+ *
+ */
+void oglFindEndForPolyline(double n, double xvec[], double yvec[],
+ double x1, double y1, double x2, double y2, double *x3, double *y3)
+{
+ int i;
+ double lastx = xvec[0];
+ double lasty = yvec[0];
+
+ double min_ratio = 1.0;
+ double line_ratio;
+ double other_ratio;
+
+ for (i = 1; i < n; i++)
+ {
+ oglCheckLineIntersection(x1, y1, x2, y2, lastx, lasty, xvec[i], yvec[i],
+ &line_ratio, &other_ratio);
+ lastx = xvec[i];
+ lasty = yvec[i];
+
+ if (line_ratio < min_ratio)
+ min_ratio = line_ratio;
+ }
+
+ // Do last (implicit) line if last and first doubles are not identical
+ if (!(xvec[0] == lastx && yvec[0] == lasty))
+ {
+ oglCheckLineIntersection(x1, y1, x2, y2, lastx, lasty, xvec[0], yvec[0],
+ &line_ratio, &other_ratio);
+
+ if (line_ratio < min_ratio)
+ min_ratio = line_ratio;
+ }
+
+ *x3 = (x1 + (x2 - x1)*min_ratio);
+ *y3 = (y1 + (y2 - y1)*min_ratio);
+
+}
+
+/*
+ * Find where the line hits the box.
+ *
+ */
+
+void oglFindEndForBox(double width, double height,
+ double x1, double y1, // Centre of box (possibly)
+ double x2, double y2, // other end of line
+ double *x3, double *y3) // End on box edge
+{
+ double xvec[5];
+ double yvec[5];
+
+ xvec[0] = (double)(x1 - width/2.0);
+ yvec[0] = (double)(y1 - height/2.0);
+ xvec[1] = (double)(x1 - width/2.0);
+ yvec[1] = (double)(y1 + height/2.0);
+ xvec[2] = (double)(x1 + width/2.0);
+ yvec[2] = (double)(y1 + height/2.0);
+ xvec[3] = (double)(x1 + width/2.0);
+ yvec[3] = (double)(y1 - height/2.0);
+ xvec[4] = (double)(x1 - width/2.0);
+ yvec[4] = (double)(y1 - height/2.0);
+
+ oglFindEndForPolyline(5, xvec, yvec, x2, y2, x1, y1, x3, y3);
+}
+
+/*
+ * Find where the line hits the circle.
+ *
+ */
+
+void oglFindEndForCircle(double radius,
+ double x1, double y1, // Centre of circle
+ double x2, double y2, // Other end of line
+ double *x3, double *y3)
+{
+ double H = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));
+
+ if (H == 0.0)
+ {
+ *x3 = x1;
+ *y3 = y1;
+ }
+ else
+ {
+ *y3 = radius * (y2 - y1)/H + y1;
+ *x3 = radius * (x2 - x1)/H + x1;
+ }
+}
+
+/*
+ * Given the line (x1, y1) -> (x2, y2), and an arrow size of given length and width,
+ * return the position of the tip of the arrow and the left and right vertices of the arrow.
+ *
+ */
+
+void oglGetArrowPoints(double x1, double y1, double x2, double y2,
+ double length, double width,
+ double *tip_x, double *tip_y,
+ double *side1_x, double *side1_y,
+ double *side2_x, double *side2_y)
+{
+ double l = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));
+
+ if (l < 0.01)
+ l = (double) 0.01;
+
+ double i_bar = (x2 - x1)/l;
+ double j_bar = (y2 - y1)/l;
+
+ double x3 = (- length*i_bar) + x2;
+ double y3 = (- length*j_bar) + y2;
+
+ *side1_x = width*(-j_bar) + x3;
+ *side1_y = width*i_bar + y3;
+
+ *side2_x = -width*(-j_bar) + x3;
+ *side2_y = -width*i_bar + y3;
+
+ *tip_x = x2; *tip_y = y2;
+}
+
+/*
+ * Given an ellipse and endpoints of a line, returns the point at which
+ * the line touches the ellipse in values x4, y4.
+ * This function assumes that the centre of the ellipse is at x1, y1, and the
+ * ellipse has a width of width1 and a height of height1. It also assumes you are
+ * wanting to draw an arc FROM point x2, y2 TOWARDS point x3, y3.
+ * This function calculates the x,y coordinates of the intersection point of
+ * the arc with the ellipse.
+ * Author: Ian Harrison
+ */
+
+void oglDrawArcToEllipse(double x1, double y1, double width1, double height1, double x2, double y2, double x3, double y3,
+ double *x4, double *y4)
+{
+ double a1 = (double)(width1/2.0);
+ double b1 = (double)(height1/2.0);
+
+ // These are required to give top left x and y coordinates for DrawEllipse
+// double top_left_x1 = (double)(x1 - a1);
+// double top_left_y1 = (double)(y1 - b1);
+/*
+ // Check for vertical line
+ if (fabs(x2 - x3) < 0.05)
+ {
+ *x4 = x3;
+ if (y2 < y3)
+ *y4 = (double)(y1 - b1);
+ else
+ *y4 = (double)(y1 + b1);
+ return;
+ }
+*/
+ // Check that x2 != x3
+ if (fabs(x2 - x3) < 0.05)
+ {
+ *x4 = x2;
+ if (y3 > y2)
+ *y4 = (double)(y1 - sqrt((b1*b1 - (((x2-x1)*(x2-x1))*(b1*b1)/(a1*a1)))));
+ else
+ *y4 = (double)(y1 + sqrt((b1*b1 - (((x2-x1)*(x2-x1))*(b1*b1)/(a1*a1)))));
+ return;
+ }
+
+ // Calculate the x and y coordinates of the point where arc intersects ellipse
+
+ double A, B, C, D, E, F, G, H, K;
+ double ellipse1_x, ellipse1_y;
+
+ A = (double)(1/(a1 * a1));
+ B = (double)((y3 - y2) * (y3 - y2)) / ((x3 - x2) * (x3 - x2) * b1 * b1);
+ C = (double)(2 * (y3 - y2) * (y2 - y1)) / ((x3 - x2) * b1 * b1);
+ D = (double)((y2 - y1) * (y2 - y1)) / (b1 * b1);
+ E = (double)(A + B);
+ F = (double)(C - (2 * A * x1) - (2 * B * x2));
+ G = (double)((A * x1 * x1) + (B * x2 * x2) - (C * x2) + D - 1);
+ H = (double)((y3 - y2) / (x3 - x2));
+ K = (double)((F * F) - (4 * E * G));
+
+ if (K >= 0)
+ // In this case the line intersects the ellipse, so calculate intersection
+ {
+ if(x2 >= x1)
+ {
+ ellipse1_x = (double)(((F * -1) + sqrt(K)) / (2 * E));
+ ellipse1_y = (double)((H * (ellipse1_x - x2)) + y2);
+ }
+ else
+ {
+ ellipse1_x = (double)(((F * -1) - sqrt(K)) / (2 * E));
+ ellipse1_y = (double)((H * (ellipse1_x - x2)) + y2);
+ }
+ }
+ else
+ // in this case, arc does not intersect ellipse, so just draw arc
+ {
+ ellipse1_x = x3;
+ ellipse1_y = y3;
+ }
+ *x4 = ellipse1_x;
+ *y4 = ellipse1_y;
+
+/*
+ // Draw a little circle (radius = 2) at the end of the arc where it hits
+ // the ellipse .
+
+ double circle_x = ellipse1_x - 2.0;
+ double circle_y = ellipse1_y - 2.0;
+ m_canvas->DrawEllipse(circle_x, circle_y, 4.0, 4.0);
+*/
+}
+
+// Update a list item from a list of strings
+void UpdateListBox(wxListBox *item, wxList *list)
+{
+ item->Clear();
+ if (!list)
+ return;
+
+ wxNode *node = list->First();
+ while (node)
+ {
+ char *s = (char *)node->Data();
+ item->Append(s);
+ node = node->Next();
+ }
+}
+
+bool oglRoughlyEqual(double val1, double val2, double tol)
+{
+ return ( (val1 < (val2 + tol)) && (val1 > (val2 - tol)) &&
+ (val2 < (val1 + tol)) && (val2 > (val1 - tol)));
+}
+
+/*
+ * Hex<->Dec conversion
+ */
+
+// Array used in DecToHex conversion routine.
+static char sg_HexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
+ 'C', 'D', 'E', 'F' };
+
+// Convert 2-digit hex number to decimal
+unsigned int oglHexToDec(char* buf)
+{
+ int firstDigit, secondDigit;
+
+ if (buf[0] >= 'A')
+ firstDigit = buf[0] - 'A' + 10;
+ else
+ firstDigit = buf[0] - '0';
+
+ if (buf[1] >= 'A')
+ secondDigit = buf[1] - 'A' + 10;
+ else
+ secondDigit = buf[1] - '0';
+
+ return firstDigit * 16 + secondDigit;
+}
+
+// Convert decimal integer to 2-character hex string
+void oglDecToHex(unsigned int dec, char *buf)
+{
+ int firstDigit = (int)(dec/16.0);
+ int secondDigit = (int)(dec - (firstDigit*16.0));
+ buf[0] = sg_HexArray[firstDigit];
+ buf[1] = sg_HexArray[secondDigit];
+ buf[2] = 0;
+}
+
+// 3-digit hex to wxColour
+wxColour oglHexToColour(const wxString& hex)
+{
+ if (hex.Length() == 6)
+ {
+ char buf[7];
+ strncpy(buf, hex, 7);
+ unsigned int r = oglHexToDec((char *)buf);
+ unsigned int g = oglHexToDec((char *)(buf+2));
+ unsigned int b = oglHexToDec((char *)(buf+4));
+ return wxColour(r, g, b);
+ }
+ else
+ return wxColour(0,0,0);
+}
+
+// RGB to 3-digit hex
+wxString oglColourToHex(const wxColour& colour)
+{
+ char buf[7];
+ unsigned int red = colour.Red();
+ unsigned int green = colour.Green();
+ unsigned int blue = colour.Blue();
+
+ oglDecToHex(red, buf);
+ oglDecToHex(green, buf+2);
+ oglDecToHex(blue, buf+4);
+
+ return wxString(buf);
+}
+
+
projects / wxWidgets.git / commitdiff
