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<h1>FTContour.cpp</h1><a href="FTContour_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#include "FTContour.h"</span>
<a name="l00002"></a>00002
<a name="l00003"></a><a class="code" href="FTContour_8cpp.html#1f5d6b82b89214b1c13f18a25f8ad819">00003</a> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">float</span> <a class="code" href="FTContour_8cpp.html#1f5d6b82b89214b1c13f18a25f8ad819">BEZIER_STEP_SIZE</a> = 0.2f;
<a name="l00004"></a>00004
<a name="l00005"></a>00005
<a name="l00006"></a>00006 <span class="keywordtype">void</span> FTContour::AddPoint( FTPoint point)
<a name="l00007"></a>00007 {
<a name="l00008"></a>00008 <span class="keywordflow">if</span>( pointList.empty() || point != pointList[pointList.size() - 1])
<a name="l00009"></a>00009 {
<a name="l00010"></a>00010 pointList.push_back( point);
<a name="l00011"></a>00011 }
<a name="l00012"></a>00012 }
<a name="l00013"></a>00013
<a name="l00014"></a>00014
<a name="l00015"></a>00015 <span class="keywordtype">void</span> FTContour::AddPoint( <span class="keywordtype">float</span> x, <span class="keywordtype">float</span> y)
<a name="l00016"></a>00016 {
<a name="l00017"></a>00017 AddPoint( FTPoint( x, y, 0.0f));
<a name="l00018"></a>00018 }
<a name="l00019"></a>00019
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="keywordtype">void</span> FTContour::evaluateQuadraticCurve()
<a name="l00022"></a>00022 {
<a name="l00023"></a>00023 <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i <= ( 1.0f / <a class="code" href="FTContour_8cpp.html#1f5d6b82b89214b1c13f18a25f8ad819">BEZIER_STEP_SIZE</a>); i++)
<a name="l00024"></a>00024 {
<a name="l00025"></a>00025 <span class="keywordtype">float</span> bezierValues[2][2];
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="keywordtype">float</span> t = static_cast<float>(i) * <a class="code" href="FTContour_8cpp.html#1f5d6b82b89214b1c13f18a25f8ad819">BEZIER_STEP_SIZE</a>;
<a name="l00028"></a>00028
<a name="l00029"></a>00029 bezierValues[0][0] = (1.0f - t) * controlPoints[0][0] + t * controlPoints[1][0];
<a name="l00030"></a>00030 bezierValues[0][1] = (1.0f - t) * controlPoints[0][1] + t * controlPoints[1][1];
<a name="l00031"></a>00031
<a name="l00032"></a>00032 bezierValues[1][0] = (1.0f - t) * controlPoints[1][0] + t * controlPoints[2][0];
<a name="l00033"></a>00033 bezierValues[1][1] = (1.0f - t) * controlPoints[1][1] + t * controlPoints[2][1];
<a name="l00034"></a>00034
<a name="l00035"></a>00035 bezierValues[0][0] = (1.0f - t) * bezierValues[0][0] + t * bezierValues[1][0];
<a name="l00036"></a>00036 bezierValues[0][1] = (1.0f - t) * bezierValues[0][1] + t * bezierValues[1][1];
<a name="l00037"></a>00037
<a name="l00038"></a>00038 AddPoint( bezierValues[0][0], bezierValues[0][1]);
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keywordtype">void</span> FTContour::evaluateCubicCurve()
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i <= ( 1.0f / <a class="code" href="FTContour_8cpp.html#1f5d6b82b89214b1c13f18a25f8ad819">BEZIER_STEP_SIZE</a>); i++)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 <span class="keywordtype">float</span> bezierValues[3][2];
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="keywordtype">float</span> t = static_cast<float>(i) * <a class="code" href="FTContour_8cpp.html#1f5d6b82b89214b1c13f18a25f8ad819">BEZIER_STEP_SIZE</a>;
<a name="l00049"></a>00049
<a name="l00050"></a>00050 bezierValues[0][0] = (1.0f - t) * controlPoints[0][0] + t * controlPoints[1][0];
<a name="l00051"></a>00051 bezierValues[0][1] = (1.0f - t) * controlPoints[0][1] + t * controlPoints[1][1];
<a name="l00052"></a>00052
<a name="l00053"></a>00053 bezierValues[1][0] = (1.0f - t) * controlPoints[1][0] + t * controlPoints[2][0];
<a name="l00054"></a>00054 bezierValues[1][1] = (1.0f - t) * controlPoints[1][1] + t * controlPoints[2][1];
<a name="l00055"></a>00055
<a name="l00056"></a>00056 bezierValues[2][0] = (1.0f - t) * controlPoints[2][0] + t * controlPoints[3][0];
<a name="l00057"></a>00057 bezierValues[2][1] = (1.0f - t) * controlPoints[2][1] + t * controlPoints[3][1];
<a name="l00058"></a>00058
<a name="l00059"></a>00059 bezierValues[0][0] = (1.0f - t) * bezierValues[0][0] + t * bezierValues[1][0];
<a name="l00060"></a>00060 bezierValues[0][1] = (1.0f - t) * bezierValues[0][1] + t * bezierValues[1][1];
<a name="l00061"></a>00061
<a name="l00062"></a>00062 bezierValues[1][0] = (1.0f - t) * bezierValues[1][0] + t * bezierValues[2][0];
<a name="l00063"></a>00063 bezierValues[1][1] = (1.0f - t) * bezierValues[1][1] + t * bezierValues[2][1];
<a name="l00064"></a>00064
<a name="l00065"></a>00065 bezierValues[0][0] = (1.0f - t) * bezierValues[0][0] + t * bezierValues[1][0];
<a name="l00066"></a>00066 bezierValues[0][1] = (1.0f - t) * bezierValues[0][1] + t * bezierValues[1][1];
<a name="l00067"></a>00067
<a name="l00068"></a>00068 AddPoint( bezierValues[0][0], bezierValues[0][1]);
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072
<a name="l00073"></a>00073 FTContour::FTContour( FT_Vector* contour, <span class="keywordtype">char</span>* pointTags, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> numberOfPoints)
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> pointIndex = 0; pointIndex < numberOfPoints; ++ pointIndex)
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 <span class="keywordtype">char</span> pointTag = pointTags[pointIndex];
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="keywordflow">if</span>( pointTag == FT_Curve_Tag_On || numberOfPoints < 2)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 AddPoint( contour[pointIndex].x, contour[pointIndex].y);
<a name="l00082"></a>00082 <span class="keywordflow">continue</span>;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 FTPoint controlPoint( contour[pointIndex]);
<a name="l00086"></a>00086 FTPoint previousPoint = ( 0 == pointIndex)
<a name="l00087"></a>00087 ? FTPoint( contour[numberOfPoints - 1])
<a name="l00088"></a>00088 : pointList[pointList.size() - 1];
<a name="l00089"></a>00089
<a name="l00090"></a>00090 FTPoint nextPoint = ( pointIndex == numberOfPoints - 1)
<a name="l00091"></a>00091 ? pointList[0]
<a name="l00092"></a>00092 : FTPoint( contour[pointIndex + 1]);
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="keywordflow">if</span>( pointTag == FT_Curve_Tag_Conic)
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <span class="keywordtype">char</span> nextPointTag = ( pointIndex == numberOfPoints - 1)
<a name="l00097"></a>00097 ? pointTags[0]
<a name="l00098"></a>00098 : pointTags[pointIndex + 1];
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordflow">while</span>( nextPointTag == FT_Curve_Tag_Conic)
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 nextPoint = FTPoint( static_cast<float>( controlPoint.x + nextPoint.x) * 0.5f,
<a name="l00103"></a>00103 static_cast<float>( controlPoint.y + nextPoint.y) * 0.5f,
<a name="l00104"></a>00104 0);
<a name="l00105"></a>00105
<a name="l00106"></a>00106 controlPoints[0][0] = previousPoint.x; controlPoints[0][1] = previousPoint.y;
<a name="l00107"></a>00107 controlPoints[1][0] = controlPoint.x; controlPoints[1][1] = controlPoint.y;
<a name="l00108"></a>00108 controlPoints[2][0] = nextPoint.x; controlPoints[2][1] = nextPoint.y;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 evaluateQuadraticCurve();
<a name="l00111"></a>00111 ++pointIndex;
<a name="l00112"></a>00112
<a name="l00113"></a>00113 previousPoint = nextPoint;
<a name="l00114"></a>00114 controlPoint = FTPoint( contour[pointIndex]);
<a name="l00115"></a>00115 nextPoint = ( pointIndex == numberOfPoints - 1)
<a name="l00116"></a>00116 ? pointList[0]
<a name="l00117"></a>00117 : FTPoint( contour[pointIndex + 1]);
<a name="l00118"></a>00118 nextPointTag = ( pointIndex == numberOfPoints - 1)
<a name="l00119"></a>00119 ? pointTags[0]
<a name="l00120"></a>00120 : pointTags[pointIndex + 1];
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 controlPoints[0][0] = previousPoint.x; controlPoints[0][1] = previousPoint.y;
<a name="l00124"></a>00124 controlPoints[1][0] = controlPoint.x; controlPoints[1][1] = controlPoint.y;
<a name="l00125"></a>00125 controlPoints[2][0] = nextPoint.x; controlPoints[2][1] = nextPoint.y;
<a name="l00126"></a>00126
<a name="l00127"></a>00127 evaluateQuadraticCurve();
<a name="l00128"></a>00128 <span class="keywordflow">continue</span>;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="keywordflow">if</span>( pointTag == FT_Curve_Tag_Cubic)
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 FTPoint controlPoint2 = nextPoint;
<a name="l00134"></a>00134
<a name="l00135"></a>00135 FTPoint nextPoint = ( pointIndex == numberOfPoints - 2)
<a name="l00136"></a>00136 ? pointList[0]
<a name="l00137"></a>00137 : FTPoint( contour[pointIndex + 2]);
<a name="l00138"></a>00138
<a name="l00139"></a>00139 controlPoints[0][0] = previousPoint.x; controlPoints[0][1] = previousPoint.y;
<a name="l00140"></a>00140 controlPoints[1][0] = controlPoint.x; controlPoints[1][1] = controlPoint.y;
<a name="l00141"></a>00141 controlPoints[2][0] = controlPoint2.x; controlPoints[2][1] = controlPoint2.y;
<a name="l00142"></a>00142 controlPoints[3][0] = nextPoint.x; controlPoints[3][1] = nextPoint.y;
<a name="l00143"></a>00143
<a name="l00144"></a>00144 evaluateCubicCurve();
<a name="l00145"></a>00145 ++pointIndex;
<a name="l00146"></a>00146 <span class="keywordflow">continue</span>;
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149 }
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