| [Overview][Constants][Types][Classes][Procedures and functions][Index] |
Point in a plane
Source position: typshrdh.inc line 62
type TPoint = packed record |
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public |
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X: LongInt; |
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Horizontal position |
Y: LongInt; |
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Vertical position |
class function Zero; |
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function Add(); |
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function Distance(); |
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function IsZero; |
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function Subtract(); |
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procedure SetLocation(); |
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procedure Offset(); |
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class function PointInCircle(); |
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class operator equal(TPoint,TPoint):Boolean(); |
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class operator notequal(TPoint,TPoint):Boolean(); |
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class operator add(TPoint,TPoint):TPoint(); |
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class operator subtract(TPoint,TPoint):TPoint(); |
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class operator assign(TSmallPoint):TPoint(); |
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class operator explicit(TPoint):TSmallPoint(); |
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end; |
TPoint is a generic definition of a point in a 2-dimensional discrete plane, where X indicates the horizontal position, and Y the vertical position (positions usually measured in pixels), and 0,0 is the origin of the plane.
Usually, the origin is the upper-left corner of the screen, with Y increasing as one moves further down the screen - this is opposite to the mathematical view where Y increases as one moves upwards.
The coordinates are integers, (32-bit, signed) so the coordinate system runs from -MaxInt to MaxInt.
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Rectangle in a plane |
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Area size |