public void Orientation2()
{
Matrix rotation = MatrixExt.Orientation(MathHelper.ToRadians(-90));
Vector2 dude = new Vector2(1.0f, 0.0f);
Vector2 result = rotation.Multiply(dude);
Assert.AreEqual(0, Convert.ToInt32(result.X));
Assert.AreEqual(-1, Convert.ToInt32(result.Y));
}
public void Orientation()
{
Matrix rotation = MatrixExt.Orientation(MathHelper.ToRadians(90));
Vector2 dude = new Vector2(1.0f, 0.0f);
Vector2 result = rotation.Multiply(dude);
Assert.AreEqual(0, (int)(result.X + 0.5f));
Assert.AreEqual(1, (int)(result.Y + 0.5f));
}
public void OrientationFromHeadingAndSide()
{
//create his heading
Vector2 dudeHeading = Vector2.UnitX;
//create his side matrix
Vector2 dudeSide = new Vector2(-dudeHeading.Y, dudeHeading.X);
//create an orientation matrix
Matrix rotate = MatrixExt.Orientation(dudeHeading, dudeSide);
//that should be identity
Assert.AreEqual(Matrix.Identity, rotate);
}
public void OrientationFromHeadingAndSide_4()
{
//create his heading
Vector2 dudeHeading = -Vector2.UnitY;
//create his side matrix
Vector2 dudeSide = new Vector2(-dudeHeading.Y, dudeHeading.X);
//create an orientation matrix
Matrix rotate = MatrixExt.Orientation(dudeHeading, dudeSide);
Vector2 myPoint = rotate.Multiply(new Vector2(0.0f, 10.0f));
Assert.AreEqual(-10.0f, Math.Round(myPoint.X, 3));
Assert.AreEqual(0.0f, Math.Round(myPoint.Y, 3));
}
public void Orientations_1()
{
//create his heading -90
Vector2 dudeHeading = new Vector2(0.0f, 1.0f);
//create his side matrix
Vector2 dudeSide = new Vector2(-dudeHeading.Y, dudeHeading.X);
//create an orientation matrix
Matrix rotate = MatrixExt.Orientation(dudeHeading, dudeSide);
//that should be identity
Matrix rotate1 = MatrixExt.Orientation(MathHelper.ToRadians(-90.0f));
for (int i = 0; i < Matrix.ToFloatArray(rotate).Length; i++)
{
float expected = (float)Math.Round(Matrix.ToFloatArray(rotate1)[i], 3);
float actual = (float)Math.Round(Matrix.ToFloatArray(rotate)[i], 3);
Assert.AreEqual(expected, actual, string.Format("incorrect index at {0}", i));
}
}
public void OrientationFromHeadingAndSide_3()
{
//create his heading
Vector2 dudeHeading = Vector2.UnitX;
//create his side matrix
Vector2 dudeSide = new Vector2(-dudeHeading.Y, dudeHeading.X);
//create an orientation matrix
Matrix rotate = MatrixExt.Orientation(dudeHeading, dudeSide);
//create a dude
Vector2 dudePos = new Vector2(100.0f, 100.0f);
//convert another point to "local space"
Vector2 myPoint = new Vector2(100.0f, 110.0f);
myPoint = myPoint - dudePos;
myPoint = rotate.Multiply(myPoint);
Assert.AreEqual(0.0f, Math.Round(myPoint.X, 3));
Assert.AreEqual(10.0f, Math.Round(myPoint.Y, 3));
}