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{
Copyright 2013-2017 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 TestCastleRectangles;
interface
uses
Classes, SysUtils, fpcunit, testutils, testregistry,
CastleRectangles, CastleBaseTestCase;
type
TTestRectangles = class(TCastleBaseTestCase)
published
procedure TestRectangles;
procedure TestScaleEmpty;
procedure TestCollidesDisc;
procedure TestAdd;
// procedure TestRightTop;
end;
implementation
uses CastleVectors;
procedure TTestRectangles.TestRectangles;
var
R: TRectangle;
begin
R := Rectangle(-100, -200, 20, 30);
AssertTrue(R.Contains(-100, -200));
AssertTrue(R.Contains(-100 + 19, -200 + 29));
AssertTrue(not R.Contains(-100 + 20, -200 + 30));
R.Grow(5);
AssertEquals(20, R.Width);
R := R.Grow(5);
AssertEquals( 30, R.Width );
AssertEquals( 40, R.Height);
AssertEquals(-105, R.Left );
AssertEquals(-205, R.Bottom);
R := R.Grow(-5);
AssertEquals( 20, R.Width );
AssertEquals( 30, R.Height);
AssertEquals(-100, R.Left );
AssertEquals(-200, R.Bottom);
R := R.Grow(-10);
AssertEquals( 0, R.Width );
AssertEquals( 10, R.Height);
AssertEquals( -90, R.Left );
AssertEquals(-190, R.Bottom);
AssertFalse(R.Contains(-100, -200));
AssertFalse(R.Contains(-100 + 19, -200 + 29));
AssertFalse(R.Contains(-100 + 20, -200 + 30));
end;
procedure TTestRectangles.TestScaleEmpty;
var
R: TRectangle;
begin
R := Rectangle(10, 20, 0, 50);
AssertEquals(0, R.ScaleWidthAround0(2));
AssertEquals(100, R.ScaleHeightAround0(2)); // correctly scaled, even though R.Width = 0
AssertEquals(0, R.ScaleAround0(2).Width);
AssertEquals(100, R.ScaleAround0(2).Height); // correctly scaled, even though R.Width = 0
AssertEquals(10, R.ScaleAround0(2).Left); // untouched by ScaleAround0, since R.Width = 0
AssertEquals(10, R.ScaleAround0(123).Left); // untouched by ScaleAround0, since R.Width = 0
AssertEquals(40, R.ScaleAround0(2).Bottom); // correctly scaled, even though R.Width = 0
// analogous to above test, but swap Width and Height
R := Rectangle(20, 10, 50, 0);
AssertEquals(100, R.ScaleWidthAround0(2)); // correctly scaled, even though R.Height = 0
AssertEquals(0, R.ScaleHeightAround0(2));
AssertEquals(100, R.ScaleAround0(2).Width); // correctly scaled, even though R.Height = 0
AssertEquals(0, R.ScaleAround0(2).Height);
AssertEquals(10, R.ScaleAround0(2).Bottom); // untouched by ScaleAround0, since R.Height = 0
AssertEquals(10, R.ScaleAround0(123).Bottom); // untouched by ScaleAround0, since R.Height = 0
AssertEquals(40, R.ScaleAround0(2).Left); // correctly scaled, even though R.Height = 0
R := Rectangle(10, 20, 0, 50);
AssertEquals(0, R.ScaleAroundCenter(2).Width);
AssertEquals(100, R.ScaleAroundCenter(2).Height); // correctly scaled, even though R.Width = 0
AssertEquals(10, R.ScaleAroundCenter(2).Left); // untouched by ScaleAroundCenter, since R.Width = 0
AssertEquals(10, R.ScaleAroundCenter(123).Left); // untouched by ScaleAroundCenter, since R.Width = 0
AssertEquals(-5, R.ScaleAroundCenter(2).Bottom); // correctly scaled, even though R.Width = 0
end;
procedure TTestRectangles.TestCollidesDisc;
var
R: TFloatRectangle;
begin
R := FloatRectangle(10, 20, 30, 40);
// left = 10, right = 40, bottom = 20, top = 60
{ circles far outside }
AssertFalse(R.CollidesDisc(Vector2(0 , 0), 1));
AssertFalse(R.CollidesDisc(Vector2(20, 0), 1));
AssertFalse(R.CollidesDisc(Vector2(50, 0), 1));
AssertFalse(R.CollidesDisc(Vector2(0, 100), 1));
AssertFalse(R.CollidesDisc(Vector2(20, 100), 1));
AssertFalse(R.CollidesDisc(Vector2(50, 100), 1));
AssertFalse(R.CollidesDisc(Vector2(0, 10), 1));
AssertFalse(R.CollidesDisc(Vector2(0, 40), 1));
AssertFalse(R.CollidesDisc(Vector2(0, 70), 1));
AssertFalse(R.CollidesDisc(Vector2(100, 10), 1));
AssertFalse(R.CollidesDisc(Vector2(100, 40), 1));
AssertFalse(R.CollidesDisc(Vector2(100, 70), 1));
{ circles collide, when one range inside }
AssertFalse(R.CollidesDisc(Vector2(-10, 10), 15));
AssertTrue(R.CollidesDisc(Vector2(20, 10), 15));
AssertFalse(R.CollidesDisc(Vector2(60, 10), 15));
AssertFalse(R.CollidesDisc(Vector2(-10, 70), 15));
AssertTrue(R.CollidesDisc(Vector2(20, 70), 15));
AssertFalse(R.CollidesDisc(Vector2(60, 70), 15));
AssertFalse(R.CollidesDisc(Vector2(0, 0), 15));
AssertTrue(R.CollidesDisc(Vector2(0, 40), 15));
AssertFalse(R.CollidesDisc(Vector2(0, 80), 15));
AssertFalse(R.CollidesDisc(Vector2(50, 0), 15));
AssertTrue(R.CollidesDisc(Vector2(50, 40), 15));
AssertFalse(R.CollidesDisc(Vector2(50, 80), 15));
{ circles collide, both ranges inside }
AssertTrue(R.CollidesDisc(Vector2(20, 40), 1));
R := FloatRectangle(0, 0, 10, 10);
AssertFalse(R.CollidesDisc(Vector2(-1, -1), 0.9));
AssertFalse(R.CollidesDisc(Vector2(-1, 5), 0.9));
AssertFalse(R.CollidesDisc(Vector2(-1, 11), 0.9));
AssertFalse(R.CollidesDisc(Vector2(-1, -1), 1.1));
AssertTrue(R.CollidesDisc(Vector2(-1, 5), 1.1));
AssertFalse(R.CollidesDisc(Vector2(-1, 11), 1.1));
end;
procedure TTestRectangles.TestAdd;
var
R: TFloatRectangle;
begin
R := TFloatRectangle.Empty;
R.Include(Vector2(10, 20)); // without assignment, R.Add does nothing
AssertTrue(R.IsEmpty);
R := R.Include(Vector2(10, 20));
AssertFalse(R.IsEmpty);
AssertSameValue(10, R.Left);
AssertSameValue(20, R.Bottom);
AssertSameValue(0, R.Width);
AssertSameValue(0, R.Height);
R.Include(Vector2(0, 40)); // without assignment, R.Add does nothing
AssertSameValue(10, R.Left);
AssertSameValue(20, R.Bottom);
AssertSameValue(0, R.Width);
AssertSameValue(0, R.Height);
R := R.Include(Vector2(0, 40));
AssertSameValue(0, R.Left);
AssertSameValue(20, R.Bottom);
AssertSameValue(10, R.Width);
AssertSameValue(20, R.Height);
R := R.Include(Vector2(5, 30)); // does not change R, since already inside
AssertSameValue(0, R.Left);
AssertSameValue(20, R.Bottom);
AssertSameValue(10, R.Width);
AssertSameValue(20, R.Height);
R := R.Include(Vector2(-10, 30)); // changes R only horizontally
AssertSameValue(-10, R.Left);
AssertSameValue(20, R.Bottom);
AssertSameValue(20, R.Width);
AssertSameValue(20, R.Height);
R := R.Include(Vector2(5, -50)); // changes R only vertically
AssertSameValue(-10, R.Left);
AssertSameValue(-50, R.Bottom);
AssertSameValue(20, R.Width);
AssertSameValue(90, R.Height);
R := R.Include(Vector2(5, -25)); // should not change R
AssertSameValue(-10, R.Left);
AssertSameValue(-50, R.Bottom);
AssertSameValue(20, R.Width);
AssertSameValue(90, R.Height);
end;
{
procedure TTestRectangles.TestRightTop;
var
RInt: TRectangle;
R: TFloatRectangle;
begin
RInt.Left := 10;
RInt.Bottom := 50;
RInt.Right := 100;
RInt.Top := 1000;
AssertEquals(90, RInt.Width);
AssertEquals(950, RInt.Height);
AssertEquals(10, RInt.Left);
AssertEquals(50, RInt.Bottom);
AssertEquals(100, RInt.Right);
AssertEquals(1000, RInt.Top);
R.Left := 10;
R.Bottom := 50;
R.Right := 100;
R.Top := 1000;
AssertSameValue(90, R.Width);
AssertSameValue(950, R.Height);
AssertSameValue(10, R.Left);
AssertSameValue(50, R.Bottom);
AssertSameValue(100, R.Right);
AssertSameValue(1000, R.Top);
end;
}
initialization
RegisterTest(TTestRectangles);
end.
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