thank you for your post, however unfortunately it didn't work. if i use

rotation = Matrix.CreateFromYawPitchRoll(yawAngle, pitchAngle, rollAngle);

then it simply doesn't turn, same as if i change my GetWorld() to just return the world matrix. And if i try to Normalize the quarternion it makes no difference.

it just seems as it is rotating around its own axis. have i multiplied it wrong?

this is the complete class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
namespace SpaceFight
{
class Player : BasicModel
{
Matrix rotation = Matrix.Identity;
float yawAngle = 0;
float pitchAngle = 0;
float rollAngle = 0;
Vector3 direction;
float movementSpeed = 2000.0f;
float turningSpeed = 1000.0f;
float tempRoll = 0;
float tempYaw = 0;
float tempPitch = 0;
public Player(Model model, Vector3 position, float yawAngle, float pitchAngle, float rollAngle, Vector3 direction)
: base(model)
{
Quaternion rot = Quaternion.CreateFromAxisAngle(new Vector3(1, 0, 0), 0f);
rot.Normalize();
world = Matrix.CreateScale(1f) * Matrix.CreateFromQuaternion(rot) * Matrix.CreateTranslation(position);
this.yawAngle = yawAngle;
this.pitchAngle = pitchAngle;
this.rollAngle = rollAngle;
this.direction = direction;
}
public override void Update(GameTime gametime)
{
ProcessKeyboard(gametime);
world *= Matrix.CreateTranslation(direction);
rotation *= Matrix.CreateFromYawPitchRoll(yawAngle, pitchAngle, rollAngle);
rollAngle = 0;
yawAngle = 0;
pitchAngle = 0;
base.Update(gametime);
}
private void ProcessKeyboard(GameTime gametime)
{
KeyboardState keyboardState = Keyboard.GetState();
if (keyboardState.IsKeyDown(Keys.W))
{
if (direction.Z < 1.5f)
direction.Z += (float)gametime.ElapsedGameTime.TotalMilliseconds / movementSpeed;
// direction.Z += 0.1f;
}
if (keyboardState.IsKeyDown(Keys.S))
{
if(direction.Z > -1.5f)
direction.Z -= (float)gametime.ElapsedGameTime.TotalMilliseconds / movementSpeed;
}
if (keyboardState.IsKeyDown(Keys.Space))
{
if (direction.Z > -1.5f && direction.Z < 0f) //check bevægelse tilbage
direction.Z += (float)gametime.ElapsedGameTime.TotalMilliseconds / movementSpeed*2;
else if (direction.Z < 1.5f && direction.Z > 0) //check bevægelse fremad
direction.Z -= (float)gametime.ElapsedGameTime.TotalMilliseconds / movementSpeed*2;
if (direction.Z < 0.1f && direction.Z > 0 || direction.Z > -0.1f && direction.Z < 0)
direction = Vector3.Zero;
}
float turningSpeed = (float)gametime.ElapsedGameTime.TotalMilliseconds / 80.0f;
turningSpeed *= 1.6f * 1;
if (keyboardState.IsKeyDown(Keys.A))
{
if (tempRoll > -MathHelper.ToRadians(45 / 2))
{
rollAngle -= MathHelper.ToRadians(turningSpeed);
}
yawAngle -= tempRoll / 10;
//direction.X -= rollAngle;
}
if (keyboardState.IsKeyDown(Keys.D))
{
if (tempRoll < MathHelper.ToRadians(45 / 2))
{
rollAngle += MathHelper.ToRadians(turningSpeed);
}
yawAngle += -tempRoll / 10;
pitchAngle += pitchAngle - yawAngle;
//direction.X += -rollAngle;
}
tempRoll += rollAngle;
tempYaw += yawAngle;
tempYaw = MathHelper.Clamp(tempYaw, 0, 0.01f);
}
public override Matrix GetWorld()
{
return world;
}
}
}

**Edited by xchimera, 21 March 2013 - 03:36 AM.**