63 lines
1.3 KiB
Plaintext
63 lines
1.3 KiB
Plaintext
=encoding UTF-8
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=head1 NAME
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BH_Line - a straight line on a plane.
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=head1 SYNTAX
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#include <BH/Math.h>
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cc prog.c -o prog -lbh
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=head1 DESCRIPTION
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The BH_Line module provides functions for working with straight lines on a
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plane. It allows you to calculate the coefficients of a line based on two
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points, find the distance from a point to a line, and determine the closest
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point on the line to a given point.
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=head1 API CALLS
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=head2 BH_LineFromPoints
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int BH_LineFromPoints(const float a[2],
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const float b[2],
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float out[3]);
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Calculates the coefficients of a line on a plane based on two points I<a> and
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I<b>.
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The I<out> parameter describes the resulting line on the plane.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_LineDistance
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float BH_LineDistance(const float line[3],
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const float point[2]);
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Calculates the distance from the point I<point> to the line I<line>.
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=head2 BH_LineClosestPoint
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void BH_LineClosestPoint(const float line[3],
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const float point[2],
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float out[2]);
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Calculates the closest point on the line I<line> to another point I<point>.
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The I<out> parameter describes the resulting point.
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=head1 SEE ALSO
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L<BH>
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