public void Vector4_BarycentricCalculatedCorrectly()
{
var vector1 = new Vector4(-123, -234, 100, 111);
var vector2 = new Vector4(234, -345, 200, 222);
var vector3 = new Vector4(456, 789, 300, 333);
var result = Vector4.Barycentric(vector1, vector2, vector3, 0.75f, 0.22f);
TheResultingValue(result).WithinDelta(0.1f)
.ShouldBe(272.13f, -92.19f, 219.0f, 243.09f);
}
public static void BarycentricRef(int times)
{
var value1 = new Vector4(0f, 2f, 4f, 6f);
var value2 = new Vector4(1f, 3f, 5f, 7f);
var value3 = new Vector4(3f, 5f, 7f, 9f);
float amount1 = 0.3f;
float amount2 = 0.6f;
Vector4 result;
for (int i = 0; i < times; i++)
{
Vector4.Barycentric(ref value1, ref value2, ref value3, amount1, amount2, out result);
}
}
public void BarycentricTest()
{
Vector4 expected;
expected = new Vector4(174.2175f, -454.0052f, -147.8177f, 141.2125f);
Assert.IsTrue(TestHelper.ApproximatelyEquals(expected, Vector4.Barycentric(a, b, c, 2.124215f, -1.326262f)), "#1");
expected = new Vector4(-263.8197f, 746.7805f, 258.9753f, -235.7217f);
Assert.IsTrue(TestHelper.ApproximatelyEquals(expected, Vector4.Barycentric(b, c, a, 2.124215f, -1.326262f)), "#2");
// Test 3
// Check if its implementation uses MathHelper
Vector4 v1 = Vector4.Barycentric(a, b, c, -0.5f, 6.78f);
Vector4 v2 = new Vector4(
MathHelper.Barycentric(a.X, b.X, c.X, -0.5f, 6.78f),
MathHelper.Barycentric(a.Y, b.Y, c.Y, -0.5f, 6.78f),
MathHelper.Barycentric(a.Z, b.Z, c.Z, -0.5f, 6.78f),
MathHelper.Barycentric(a.W, b.W, c.W, -0.5f, 6.78f));
Assert.IsTrue(v1 == v2, "Barycentric#3");
}
