[InlineData(0, 1, 1, 0)] // Touching
public void CoincidentalShouldIntersect(int a0, int a1, int b0, int b1)
{
// Horizontal
var a = new OrthoLine(a0, a1, 0, true);
var b = new OrthoLine(b0, b1, 0, true);
Assert.True(a.Intersects(b, out _));
Assert.True(b.Intersects(a, out _));
a = new OrthoLine(-a0, -a1, 0, false);
b = new OrthoLine(-b0, -b1, 0, false);
Assert.True(a.Intersects(b, out _));
Assert.True(b.Intersects(a, out _));
// Vertical
a = new OrthoLine(a0, a1, 0, false);
b = new OrthoLine(b0, b1, 0, false);
Assert.True(a.Intersects(b, out _));
Assert.True(b.Intersects(a, out _));
a = new OrthoLine(-a0, -a1, 0, false);
b = new OrthoLine(-b0, -b1, 0, false);
Assert.True(a.Intersects(b, out _));
Assert.True(b.Intersects(a, out _));
}
public void ParallelShouldNotIntersect()
{
// Horizontal
var a = new OrthoLine(-1, 1, 0, true);
var b = new OrthoLine(-1, 1, 1, true);
Assert.False(a.Intersects(b, out _));
Assert.False(b.Intersects(a, out _));
a = new OrthoLine(1, -1, 0, true);
b = new OrthoLine(1, -1, 1, true);
Assert.False(a.Intersects(b, out _));
Assert.False(b.Intersects(a, out _));
// Vertical
a = new OrthoLine(-1, 1, 0, false);
b = new OrthoLine(-1, 1, 1, false);
Assert.False(a.Intersects(b, out _));
Assert.False(b.Intersects(a, out _));
a = new OrthoLine(1, -1, 0, false);
b = new OrthoLine(1, -1, 1, false);
Assert.False(a.Intersects(b, out _));
Assert.False(b.Intersects(a, out _));
}
public void PerpendicularShouldNotIntersect(int a0, int a1, int ao, int b0, int b1, int bo)
{
var a = new OrthoLine(a0, a1, ao, false);
var b = new OrthoLine(b0, b1, bo, true);
Point intersection;
Assert.False(a.Intersects(b, out intersection));
Assert.False(b.Intersects(a, out intersection));
}
public void PerpendicularShouldIntersect(int a0, int a1, int ao, int b0, int b1, int bo, int x, int y)
{
Point intersection;
var a = new OrthoLine(a0, a1, ao, false);
var b = new OrthoLine(b0, b1, bo, true);
Assert.True(a.Intersects(b, out intersection));
Assert.Equal(x, intersection.X);
Assert.Equal(y, intersection.Y);
Assert.True(b.Intersects(a, out intersection));
Assert.Equal(x, intersection.X);
Assert.Equal(y, intersection.Y);
a = new OrthoLine(-a0, -a1, -ao, false);
b = new OrthoLine(-b0, -b1, -bo, true);
Assert.True(a.Intersects(b, out intersection));
Assert.Equal(-x, intersection.X);
Assert.Equal(-y, intersection.Y);
Assert.True(b.Intersects(a, out intersection));
Assert.Equal(-x, intersection.X);
Assert.Equal(-y, intersection.Y);
}
