using Microsoft.Xna.Framework;
namespace Innovation
{
public static class MathUtil
{
// Generates a projection matrix for a draw call
public static Matrix CreateProjectionMatrix()
{
return Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4,
(float)Engine.GraphicsDevice.Viewport.Width
/ (float)Engine.GraphicsDevice.Viewport.Height,
.01f, 1000000);
}
// Creates a world matrix
public static Matrix CreateWorldMatrix(Vector3 Translation)
{
return CreateWorldMatrix(Translation, Matrix.Identity);
}
// Creates a world matrix
public static Matrix CreateWorldMatrix(Vector3 Translation,
Matrix Rotation)
{
return CreateWorldMatrix(Translation, Rotation, Vector3.One);
}
// Creates a world matrix
public static Matrix CreateWorldMatrix(Vector3 Translation,
Matrix Rotation, Vector3 Scale)
{
return Matrix.CreateScale(Scale) *
Rotation *
Matrix.CreateTranslation(Translation);
}
// Converts a rotation vector into a rotation matrix
public static Matrix Vector3ToMatrix(Vector3 Rotation)
{
return Matrix.CreateFromYawPitchRoll(Rotation.Y, Rotation.X, Rotation.Z);
}
// Converts a rotation matrix into a rotation vector
public static Vector3 MatrixToVector3(Matrix Rotation)
{
Quaternion q = Quaternion.CreateFromRotationMatrix(Rotation);
return new Vector3(q.X, q.Y, q.Z);
}
}
}
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