mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-05-07 06:52:44 +02:00
316 lines
8.8 KiB
ObjectPascal
316 lines
8.8 KiB
ObjectPascal
{
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*****************************************************************************
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* *
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* See the file COPYING.modifiedLGPL.txt, included in this distribution, *
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* for details about the copyright. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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*****************************************************************************
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Authors: Alexander Klenin
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}
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unit UtilsTest;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FPCUnit, TestRegistry, TAChartUtils;
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type
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{ TIntervalListTest }
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TIntervalListTest = class(TTestCase)
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private
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FIList: TIntervalList;
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protected
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procedure SetUp; override;
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procedure TearDown; override;
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published
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procedure Basic;
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procedure Intersect;
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procedure Merge;
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end;
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{ TGeometryTest }
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TGeometryTest = class(TTestCase)
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private
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procedure AssertEquals(const Expected, Actual: TDoublePoint); overload;
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procedure AssertEquals(const Expected, Actual: TPoint); overload;
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procedure AssertEquals(const Expected, Actual: TRect); overload;
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published
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procedure TestExpandRect;
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procedure TestLineIntersectsLine;
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procedure TestLineIntersectsRect;
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procedure TestPointInPolygon;
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procedure TestPointOnLine;
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procedure TestPointOperations;
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procedure TestPolygonIntersectsPolygon;
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end;
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{ TColorTest }
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TColorTest = class(TTestCase)
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private
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procedure AssertEqualsHex(Expected, Actual: Integer); overload;
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published
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procedure TestInterpolate;
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end;
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implementation
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uses
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TAGeometry;
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{ TIntervalListTest }
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procedure TIntervalListTest.Basic;
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begin
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AssertEquals(0, FIList.IntervalCount);
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FIList.AddRange(1.0, 2.0);
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AssertEquals(1, FIList.IntervalCount);
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FIList.AddPoint(3.0);
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AssertEquals(2, FIList.IntervalCount);
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AssertEquals(3.0, FIList.Interval[1].FEnd);
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FIList.Clear;
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AssertEquals(0, FIList.IntervalCount);
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end;
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procedure TIntervalListTest.Intersect;
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var
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l, r: Double;
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hint: Integer = 0;
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begin
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FIList.Clear;
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FIList.AddRange(1.0, 2.0);
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l := 5.0;
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r := 6.0;
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AssertFalse(FIList.Intersect(l, r, hint));
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l := 1.5;
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r := 6.0;
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AssertTrue(FIList.Intersect(l, r, hint));
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AssertEquals(2.0, r);
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FIList.Epsilon := 0.1;
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l := 0.5;
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r := 2.5;
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AssertTrue(FIList.Intersect(l, r, hint));
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AssertEquals(0.9, l);
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AssertEquals(2.1, r);
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end;
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procedure TIntervalListTest.Merge;
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begin
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FIList.Clear;
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FIList.AddRange(1.0, 2.0);
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FIList.AddRange(3.0, 4.0);
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AssertEquals(2, FIList.IntervalCount);
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FIList.AddRange(1.5, 2.5);
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AssertEquals(2, FIList.IntervalCount);
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AssertEquals(2.5, FIList.Interval[0].FEnd);
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FIList.AddRange(3.5, 3.6);
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AssertEquals(2, FIList.IntervalCount);
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FIList.AddRange(2.5, 3.0);
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AssertEquals(1, FIList.IntervalCount);
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FIList.AddPoint(4.0);
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AssertEquals(1, FIList.IntervalCount);
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FIList.AddPoint(4.1);
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AssertEquals(2, FIList.IntervalCount);
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end;
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procedure TIntervalListTest.SetUp;
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begin
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inherited SetUp;
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FIList := TIntervalList.Create;
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end;
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procedure TIntervalListTest.TearDown;
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begin
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inherited TearDown;
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FreeAndNil(FIList);
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end;
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{ TGeometryTest }
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procedure TGeometryTest.AssertEquals(const Expected, Actual: TDoublePoint);
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begin
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AssertEquals(Expected.X, Actual.X);
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AssertEquals(Expected.Y, Actual.Y);
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end;
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procedure TGeometryTest.AssertEquals(const Expected, Actual: TPoint);
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begin
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AssertEquals(Expected.X, Actual.X);
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AssertEquals(Expected.Y, Actual.Y);
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end;
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procedure TGeometryTest.AssertEquals(const Expected, Actual: TRect);
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begin
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AssertEquals(Expected.TopLeft, Actual.TopLeft);
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AssertEquals(Expected.BottomRight, Actual.BottomRight);
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end;
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procedure TGeometryTest.TestExpandRect;
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var
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r: TRect;
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begin
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r := Rect(0, 0, 0, 0);
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ExpandRect(r, Point(1, 2));
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AssertEquals(Rect(0, 0, 1, 2), r);
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ExpandRect(r, Point(-5, -6));
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AssertEquals(Rect(-5, -6, 1, 2), r);
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r := Rect(100, 100, 0, 0);
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ExpandRect(r, Point(3, 1));
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AssertEquals(Rect(3, 1, 3, 1), r);
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end;
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procedure TGeometryTest.TestLineIntersectsLine;
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var
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p1, p2: TPoint;
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begin
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p1 := Point(0, 0);
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p2 := Point(1, 1);
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AssertTrue(IsLineIntersectsLine(Point(1, 0), Point(0, 1), p1, p2));
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AssertTrue(IsLineIntersectsLine(Point(1, 0), Point(0, 0), p1, p2));
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AssertTrue(IsLineIntersectsLine(Point(1, 1), Point(2, 2), p1, p2));
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AssertFalse(IsLineIntersectsLine(Point(2, 2), Point(3, 3), p1, p2));
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AssertTrue(IsLineIntersectsLine(Point(2, 0), Point(0, 2), p1, p2));
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AssertFalse(IsLineIntersectsLine(Point(3, 0), Point(0, 3), p1, p2));
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p2 := Point(1, 0);
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AssertTrue(IsLineIntersectsLine(Point(0, 0), Point(2, 0), p1, p2));
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AssertFalse(IsLineIntersectsLine(Point(0, 1), Point(1, 1), p1, p2));
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end;
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procedure TGeometryTest.TestLineIntersectsRect;
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var
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r: TDoubleRect = (a: (X: 0; Y: 0); b: (X: 20; Y: 10));
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procedure Check(AP1, AP2, AR1, AR2: TDoublePoint);
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begin
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AssertTrue(LineIntersectsRect(AP1, AP2, r));
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AssertEquals(AR1, AP1);
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AssertEquals(AR2, AP2);
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end;
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var
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p1, p2: TDoublePoint;
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begin
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p1 := DoublePoint(-1, -1);
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p2 := DoublePoint(0, 20);
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AssertFalse(LineIntersectsRect(p1, p2, r));
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p1 := DoublePoint(100, 20);
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AssertFalse(LineIntersectsRect(p1, p2, r));
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p1 := DoublePoint(-1, -1);
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p2 := DoublePoint(1, 1);
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Check(p1, p2, DoublePoint(0, 0), p2);
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p1 := DoublePoint(0, 0);
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Check(p1, p2, p1, p2);
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p1 := DoublePoint(20, 20);
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p2 := DoublePoint(20, -10);
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Check(p1, p2, DoublePoint(20, 10), DoublePoint(20, 0));
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p1 := DoublePoint(10, 20);
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p2 := DoublePoint(15, -10);
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Check(p1, p2, DoublePoint(11.6667, 10), DoublePoint(13.3333, 0));
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end;
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procedure TGeometryTest.TestPointInPolygon;
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var
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p: TPoint;
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r: array [1..4] of TPoint =
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((X: 0; Y: 0), (X: 10; Y: 0), (X: 10; Y: 5), (X: 0; Y: 5));
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begin
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p := Point(1, 1);
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AssertFalse(IsPointInPolygon(p, []));
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AssertTrue(IsPointInPolygon(p, [Point(0, 0), Point(0, 2), Point(3, 0)]));
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AssertTrue(IsPointInPolygon(p, [Point(0, 0), Point(0, 2), Point(3, 1)]));
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AssertTrue(IsPointInPolygon(p, [Point(0, 0), Point(0, 2), Point(1, 1)]));
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AssertFalse(IsPointInPolygon(p, [Point(2, 0), Point(2, 2), Point(3, 1)]));
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AssertFalse(IsPointInPolygon(p, [Point(2, 0), Point(1, 2), Point(0, 10)]));
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AssertTrue(IsPointInPolygon(Point(5, 5), r));
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AssertTrue(IsPointInPolygon(Point(10, 5), r));
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AssertFalse(IsPointInPolygon(Point(11, 5), r));
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AssertFalse(IsPointInPolygon(Point(0, -1), r));
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end;
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procedure TGeometryTest.TestPointOnLine;
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begin
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AssertTrue(IsPointOnLine(Point(0, 0), Point(-1, -1), Point(1, 1)));
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AssertFalse(IsPointOnLine(Point(1, 0), Point(-1, -1), Point(1, 1)));
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AssertTrue(IsPointOnLine(Point(0, 0), Point(0, -1), Point(0, 1)));
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AssertFalse(IsPointOnLine(Point(-1, 0), Point(0, -1), Point(0, 1)));
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AssertTrue(IsPointOnLine(Point(0, 0), Point(-1, 0), Point(1, 0)));
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AssertFalse(IsPointOnLine(Point(0, 1), Point(-1, 0), Point(1, 0)));
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end;
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procedure TGeometryTest.TestPointOperations;
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begin
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AssertEquals(Point(1, 0), RotatePoint(Point(1, 0), 0.0));
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AssertEquals(Point(0, 1), RotatePoint(Point(1, 0), Pi / 2));
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AssertEquals(Point(14, 0), RotatePoint(Point(10, 10), -Pi / 4));
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end;
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procedure TGeometryTest.TestPolygonIntersectsPolygon;
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function OffsetPolygon(AP: array of TPoint; AOffset: TPoint): TPointArray;
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var
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i: Integer;
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begin
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SetLength(Result, Length(AP));
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for i := 0 to High(AP) do
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Result[i] := AP[i] + AOffset;
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end;
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var
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p1: array [1..4] of TPoint =
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((X: 0; Y: 0), (X: 10; Y: 0), (X: 10; Y: 5), (X: 0; Y: 5));
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begin
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AssertTrue(IsPolygonIntersectsPolygon(p1, OffsetPolygon(p1, Point(0, 0))));
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AssertTrue(IsPolygonIntersectsPolygon(p1, OffsetPolygon(p1, Point(1, 1))));
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AssertTrue(IsPolygonIntersectsPolygon(p1, OffsetPolygon(p1, Point(5, 0))));
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AssertTrue(IsPolygonIntersectsPolygon(p1, OffsetPolygon(p1, Point(10, 0))));
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AssertFalse(IsPolygonIntersectsPolygon(p1, OffsetPolygon(p1, Point(11, 0))));
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AssertFalse(IsPolygonIntersectsPolygon(p1, OffsetPolygon(p1, Point(0, -6))));
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end;
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{ TColorTest }
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procedure TColorTest.AssertEqualsHex(Expected, Actual: Integer);
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begin
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AssertTrue(
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ComparisonMsg(IntToHex(Expected, 8), IntToHex(Actual, 8)),
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Expected = Actual);
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end;
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procedure TColorTest.TestInterpolate;
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begin
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AssertEqualsHex($01020304, InterpolateRGB($01020304, $00787980, 0.0));
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AssertEqualsHex($00787980, InterpolateRGB($01020304, $00787980, 1.0));
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AssertEqualsHex($003D3E42, InterpolateRGB($01020304, $00787980, 0.5));
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AssertEqualsHex($01010102, InterpolateRGB($01010100, $02020214, 0.1));
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end;
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initialization
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RegisterTests([TIntervalListTest, TGeometryTest, TColorTest]);
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end.
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