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{
Copyright 2004-2014 Michalis Kamburelis.
This file is part of "Castle Game Engine".
"Castle Game Engine" is free software; see the file COPYING.txt,
included in this distribution, for details about the copyright.
"Castle Game Engine" is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
----------------------------------------------------------------------------
}
unit TestSpaceFillingCurves;
interface
uses
Classes, SysUtils, fpcunit, testutils, testregistry;
type
TTestSpaceFillingCurves = class(TTestCase)
published
procedure TestSpaceFillingCurves;
end;
implementation
uses CastleVectors, CastleImages, CastleSpaceFillingCurves, CastleUtils,
CastleColors;
const
Red3Byte: TVector3Byte = (255, 0, 0);
Green3Byte: TVector3Byte = (0, 255, 0);
procedure TTestSpaceFillingCurves.TestSpaceFillingCurves;
procedure TestCurve(CurveClass: TSpaceFillingCurveClass; Width, Height: Cardinal);
{ sprawdz ze curve wypelnia caly obrazek, i tylko caly obrazek,
i kazdy pixel obrazka jest wypelniony dokladnie raz. }
var Img: TCastleImage;
Curve: TSpaceFillingCurve;
pixCoords: TVector2Cardinal;
pix: PVector3Byte;
OutFileName: string;
begin
Curve := nil;
Img := TRGBImage.Create(Width, Height);
try
try
Curve := CurveClass.Create(Width, Height);
Img.Clear(Vector4Byte(Green3Byte, 255));
while not Curve.EndOfPixels do
begin
pixCoords := Curve.NextPixel;
AssertTrue(Between(pixCoords[0], 0, Width-1));
AssertTrue(Between(pixCoords[1], 0, Height-1));
pix := PVector3Byte(Img.PixelPtr(pixCoords[0], pixCoords[1]));
{ kazdy pix moze byc podany tylko raz, czyli teraz pix powinien
byc zielony. }
AssertTrue(CompareMem(pix, @Green3Byte, SizeOf(TVector3Byte)));
pix^ := Red3Byte;
end;
{ na koncu caly obrazek powinien byc czerwony }
AssertTrue(Img.IsClear(Vector4Byte(Red3Byte, 255)));
except
OutFileName := GetTempDir + '/test_space_filling_curves.ppm';
SaveImage(Img, OutFileName);
Writeln(Format('and it failed at curveClass %s, Width %d, Height %d',
[CurveClass.ClassName, Width, Height]), nl,
'dump written to ' + OutFileName);
raise;
end;
finally
Curve.Free;
FreeAndNil(Img)
end;
end;
procedure TestCurves(Width, Height: Cardinal);
begin
TestCurve(TSwapScanCurve, Width, Height);
TestCurve(THilbertCurve, Width, Height);
TestCurve(TPeanoCurve, Width, Height);
end;
var i: integer;
begin
for i := 1 to 20 do TestCurves(Random(100), Random(100));
{ perfidne testy sprawdzajace czy nasze curve'y radza sobie tez gdy jeden
z Width, Height = 0 }
TestCurves(0, 0);
TestCurves(10, 0);
TestCurves(0, 10);
end;
initialization
RegisterTest(TTestSpaceFillingCurves);
end.
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