8000 go-stuff/curve/vec2_test.go at main · dominikh/go-stuff · GitHub

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// SPDX-FileCopyrightText: 2026 Dominik Honnef and contributors

//

// SPDX-License-Identifier: MIT

package curve

import "testing"

func TestVec2CrossSign(t *testing.T) {

v1 := Vec(1, 0)

v2 := Vec(0, 1)

c := v1.Cross(v2)

if c != 1 {

t.Fatalf("cross(%s, %s) = %g, want 1", v1, v2, c)

}

}

func TestVec2Turn90(t *testing.T) {

u := Vec(0.1, 0.2)

turned := u.Turn90()

if l0, l1 := u.Hypot(), turned.Hypot(); l0 != l1 {

t.Fatalf("%g != %g", l0, l1)

}

}

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