Rotating a Sprite with Controls

Rotating a Sprite with Controls

XnaGnDev 13 Sep 2009 14:16

Can someone help me, i've been trying to make a sprite rotate using the Left and Right keys.

Simple problem that my noobish mind cant solve. But heres the catch, it has to be in a Sprite class. Thanks

Re: Rotating a Sprite with Controls

XnaGnDev 13 Sep 2009 14:41

i followed the arrow tutorial, and i made some adjustments for the controls, i.e.

if (Keyboard.GetState().IsKeyDown(Keys.Down))
{
angle += 0.2f;
}
if (Keyboard.GetState().IsKeyDown(Keys.Up))
{
angle -= 0.2f;
}

But the problem is, its not rotating on the center of the sprite. Can anyone teach me how to rotate it on the center of the sprite?

I finally got it. Thanks...theres the code for those who needs it

XnaGnDev 13 Sep 2009 15:29

protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
arrow = Content.Load<Texture2D>("SpriteOp1");
Viewport viewport = graphics.GraphicsDevice.Viewport;
origin.X = arrow.Width / 2;
origin.Y = arrow.Height / 2;
screenpos.X = viewport.Width / 2;
screenpos.Y = viewport.Height / 2;

// TODO: use this.Content to load your game content here
}

protected override void Update(GameTime gameTime)
{
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();

float elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;

// TODO: Add your game logic here.
if (Keyboard.GetState().IsKeyDown(Keys.Left))
{
RotationAngle += (float)(elapsed * 5.0);
float circle = MathHelper.Pi * 2;
RotationAngle = RotationAngle % circle;
}
if (Keyboard.GetState().IsKeyDown(Keys.Right))
{
RotationAngle -= (float)(elapsed * 5.0);
float circle = MathHelper.Pi * 2;
RotationAngle = RotationAngle % circle;
}
// TODO: Add your update logic here

base.Update(gameTime);
}

protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
spriteBatch.Begin();

spriteBatch.Draw(arrow, screenpos, null, Color.White, RotationAngle,
origin, 1.0f, SpriteEffects.None, 0f);

spriteBatch.End();

base.Draw(gameTime);
}