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<?xml version="1.0" encoding="UTF-8"?>
<fpdoc-descriptions>
<package name="TAChartLazarusPkg">
<module name="TAGeometry">
<element name="IsPointInRect">
<short>Returns <var>true</var> when the point <var>AP</var> is inside a rectangle or on its borders.</short>
<descr>The rectangle can be specified as a <var>TRect</var> structure or by its top/left and bottom/right corner points (<var>TPoint</var>).
</descr>
</element>
<element name="IsRectInRect">
<short>Returns <var>true</var> when a rectangle is contained within another rectangle</short>
<descr>Note: The rectangle is still considered to be contained within the outer
rectangle even when their corners collide.
</descr>
</element>
<element name="CopyPoints">
<short>Copies the points from a TPoint array to the result array</short>
</element>
<element name="DotProduct">
<short>Calculates the dot product of the two 2D vectors A and B</short>
<descr>The dot product of two vectors A and B is calculated as
<var>Result := A.X * B.X + A.Y * B.Y</var>
</descr>
</element>
<element name="DoublePoint">
<short>Creates a <var>TDoublePoint</var> record from two floating point values AX and AY, or from a <var>TPoint</var> having integer coordinates</short>
<seealso>
<link id="TAChartUtils.TDoublePoint">TDoublePoint</link>
</seealso>
</element>
<element name="DoubleRect">
<short>Creates a <var>TDoubleRect</var> data structure from four floating point values</short>
<seealso>
<link id="TAChartUtils.TDoubleRect">TDoubleRect</link>
</seealso>
</element>
<element name="ExpandRect">
<short>Expands the given rectangle by the X and Y values of the specified point</short>
</element>
<element name="IsPointOnLine">
<short>Returns <var>true</var> when the point <var>AP</var> is on the line between the points <var>A1</var> and <var>A2</var>
</short>
</element>
<element name="IsPointInPolygon">
<short>Returns <var>true</var> when the point <var>AP</var> is inside or on the border of the polygon define by the points in the array <var>APolygon</var>
</short>
</element>
<element name="IsLineIntersectsLine">
<short>Returns <var>true</var> when the line defined by the points <var>AA</var> and <var>AB</var> intersects the line given by the points <var>AC</var> and <var>AD</var>
</short>
</element>
<element name="IsPolygonIntersectsPolygon">
<short>Returns <var>true</var> when the two polygons given by the point arrays <var>AP1</var> and <var>AP2</var>, respectively, intersect</short>
</element>
<element name="LineIntersectsRect">
<short>Returns <var>true</var> when the line given by the points <var>AA</var> and <var>AB</var> intersects the given rectangle <var>ARect</var>
</short>
</element>
<element name="MakeSquare">
<short>Creates a square rectangle from the input rectangle <var>ARect</var>
</short>
<descr>The length of the longer side is shortened to become equal to the shorter side.
</descr>
</element>
<element name="MaxPoint">
<short>Creates a <var>TPoint</var> from the maximum x and y coordinates of two other points, <var>A</var> and <var>B</var>
</short>
</element>
<element name="MeasureRotatedRect"/>
<element name="NormalizeRect">
<short>Ensures that the corner coordinates of the given rectangle are in the correct order</short>
<descr><ul><li>for <b>integer </b>coordinates: <var>Left <= Right</var> and <var>Top <= Bottom</var>
</li><li>for <b>floating point</b> coordinates:<var>a.X <= b.X</var> and <var>a.Y <= b.Y</var>
</li>
</ul>
</descr>
</element>
<element name="PointDist">
	 <short>Returns a parameter characterizing the distance between the points <var>A</var> and <var>B</var>
</short>
	 <descr><p>The "distance" is calculated as the square of the sum of the coordinate differences:</p><p><var>Result := sqr(A.X - B.X) + sqr(A.Y - B.Y)</var>
</p><p>The standard Euclidian distance would be obtained by calculating the square root of the result.</p>
</descr>
</element><element name="PointDistX"><short>Returns the difference of the X coordinates of the two points <var>A</var> and <var>B</var>
</short>
</element><element name="PointDistY"><short>Returns the difference of the Y coordinates of the two points <var>A</var> and <var>B</var>
</short>
</element><element name="PointLineDist"><short>Returns a parameter for the distance between point <var>P</var> and the line given by the points <var>A</var> and <var>B</var>
</short><descr>Note that this parameter corresponds to the squared Euclidian distance.
</descr>
</element>
</module>
</package>
</fpdoc-descriptions>
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