206 lines
6.0 KiB
Plaintext
206 lines
6.0 KiB
Plaintext
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=encoding UTF-8
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=head1 NAME
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BH_Ray2f, BH_Segment2f - Ray/segment on a plane
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=head1 SYNTAX
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#include <BH/Math/Ray2f.h>
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cc prog.c -o prog -lbh
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=head1 DESCRIPTION
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This module provides functions for working with rays and segments on a plane.
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It includes functions for checking intersections between rays, segments, lines,
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and bounding rectangles.
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=head1 API CALLS
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=head2 BH_Ray2fIntersectLine
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int BH_Ray2fIntersectLine(const float start[2],
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const float direction[2],
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const float line[3],
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float *t,
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float out[2]);
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Checks the intersection between a ray and a line.
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The parameters I<start> and I<direction> describe the ray.
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The parameter I<line> describes the line.
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The parameter I<t> describes the resulting time of the ray's intersection.
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The parameter I<out> describes the resulting intersection point.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_Ray2fIntersectTime
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int BH_Ray2fIntersectTime(const float aStart[2],
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const float aDirection[2],
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const float bStart[2],
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const float bDirection[2],
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float *time1,
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float *time2);
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Calculates the intersection time between two rays.
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The parameters I<aStart> and I<aDirection> describe the first ray.
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The parameters I<bStart> and I<bDirection> describe the second ray.
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The parameter I<time1> describes the resulting intersection time of the first
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ray.
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The parameter I<time2> describes the resulting intersection time of the second
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ray.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_Ray2fIntersectRay
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int BH_Ray2fIntersectRay(const float aStart[2],
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const float aDirection[2],
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const float bStart[2],
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const float bDirection[2],
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float *t,
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float out[2]);
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Checks the intersection between two rays.
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The parameters I<aStart> and I<aDirection> describe the first ray.
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The parameters I<bStart> and I<bDirection> describe the second ray.
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The parameter I<t> describes the resulting intersection time of the first ray.
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The parameter I<out> describes the resulting intersection point.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_Ray2fIntersectSegment
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int BH_Ray2fIntersectSegment(const float aStart[2],
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const float aDirection[2],
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const float bStart[2],
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const float bEnd[2],
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float *t,
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float out[2]);
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Checks the intersection between a ray and a segment.
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The parameters I<aStart> and I<aDirection> describe the ray.
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The parameters I<bStart> and I<bEnd> describe the segment.
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The parameter I<t> describes the resulting intersection time of the ray.
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The parameter I<out> describes the resulting intersection point.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_Segment2fIntersectLine
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int BH_Segment2fIntersectLine(const float start[2],
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const float end[2],
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const float line[3],
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float *t,
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float out[2]);
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Checks the intersection between a segment and a line.
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The parameters I<start> and I<end> describe the segment.
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The parameter I<line> describes the line.
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The parameter I<t> describes the resulting intersection time of the segment.
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The parameter I<out> describes the resulting intersection point.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_Segment2fIntersectSegment
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int BH_Segment2fIntersectSegment(const float aStart[2],
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const float aEnd[2],
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const float bStart[2],
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const float bEnd[2],
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float *t,
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float out[2]);
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Checks the intersection between two segments.
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The parameters I<aStart> and I<aEnd> describe the first segment.
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The parameters I<bStart> and I<bEnd> describe the second segment.
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The parameter I<t> describes the resulting intersection time of the first
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segment.
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The parameter I<out> describes the resulting intersection point.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_Ray2fIntersectBox2f
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int BH_Ray2fIntersectBox2f(const float aStart[2],
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const float aDirection[2],
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const float bMin[2],
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const float bMax[2],
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float *t,
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float out[2]);
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Checks the intersection between a ray and a bounding box.
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The parameters I<aStart> and I<aDirection> describe the ray.
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The parameters I<bMin> and I<bMax> describe the bounding box.
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The parameter I<t> describes the resulting intersection time of the ray.
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The parameter I<out> describes the resulting intersection point.
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If successful, the function returns 0, otherwise it returns an error code.
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=head2 BH_Segment2fIntersectBox2f
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int BH_Segment2fIntersectBox2f(const float aStart[2],
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const float aEnd[2],
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const float bMin[2],
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const float bMax[2],
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float *t,
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float out[2]);
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Checks the intersection between a segment and a bounding box.
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The parameters I<aStart> and I<aEnd> describe the segment.
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The parameters I<bMin> and I<bMax> describe the bounding box.
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The parameter I<t> describes the resulting intersection time of the segment.
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The parameter I<out> describes the resulting intersection point.
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If successful, the function returns 0, otherwise it returns an error code.
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=head1 SEE ALSO
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L<BH>
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