test/quad_test.dart

library vector_math.test.quad_test;

import 'package:unittest/unittest.dart';

import 'package:vector_math/vector_math.dart';

import 'test_utils.dart';

void main() {
  group('Quad', () {
    test('CopyNormalInto', () {
      final quad = new Quad.points(new Vector3(1.0, 0.0, 1.0),
          new Vector3(0.0, 2.0, 1.0), new Vector3(1.0, 0.0, 0.0),
          new Vector3(0.0, 2.0, 0.0));
      final normal = new Vector3.zero();

      quad.copyNormalInto(normal);

      relativeTest(
          normal, new Vector3(-0.8944271802902222, -0.4472135901451111, 0.0));
    });

    test('CopyTriangles', () {
      final quad = new Quad.points(new Vector3(1.0, 0.0, 1.0),
          new Vector3(0.0, 2.0, 1.0), new Vector3(1.0, 0.0, 0.0),
          new Vector3(0.0, 2.0, 0.0));
      final t1 = new Triangle();
      final t2 = new Triangle();
      final normal = new Vector3.zero();
      final t1Normal = new Vector3.zero();
      final t2Normal = new Vector3.zero();

      quad.copyNormalInto(normal);

      quad.copyTriangles(t1, t2);
      t1.copyNormalInto(t1Normal);
      t2.copyNormalInto(t2Normal);

      relativeTest(t1Normal, normal);
      relativeTest(t2Normal, normal);
    });
  });
}