I'm confused about why this is happening -
I used the code from tutorial1 - Displaying a 3D Model on the Screen
And then I added a background as recommended in the Ideas to Expand section using a call to spritebatch.draw.
Problem is that when I call SrpiteBatch.Begin is causes my model to become semi-transparent (I can see the model, the background through the model and all the sub mesh pieces that should be hidden behind the outer most portions of the model. If I comment out the spritebatch.begin and end methods the model is no longer transparent.
Heres the code: If anyone knows why this is happening please explain - Thanks much.
using
System;
using
System.Collections.Generic;
using
Microsoft.Xna.Framework;
using
Microsoft.Xna.Framework.Audio;
using
Microsoft.Xna.Framework.Content;
using
Microsoft.Xna.Framework.Graphics;
using
Microsoft.Xna.Framework.Input;
using
Microsoft.Xna.Framework.Storage;
namespace
T2___Model
{
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
ContentManager content;
Model myModel;
SpriteBatch batch;
Texture2D background;
public Game1()
{
graphics =
new GraphicsDeviceManager(this);
content =
new ContentManager(Services);
}
protected override void Initialize()
{
base.Initialize();
}
protected override void LoadGraphicsContent(bool loadAllContent)
{
if (loadAllContent)
{
myModel = content.Load<
Model>("Content\\Models\\p1_wedge");
batch =
new SpriteBatch(graphics.GraphicsDevice);
background = content.Load<
Texture2D>("Content\\Textures\\B1_stars");
}
}
protected override void UnloadGraphicsContent(bool unloadAllContent)
{
if (unloadAllContent == true)
{
content.Unload();
}
}
KeyboardState ks;
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
ks =
Keyboard.GetState();
if( ks.IsKeyDown(Keys.Left) )
modelrotationY -= gameTime.ElapsedGameTime.Milliseconds *
MathHelper.ToRadians(0.1f);
if (ks.IsKeyDown(Keys.Right))
modelrotationY+= gameTime.ElapsedGameTime.Milliseconds *
MathHelper.ToRadians(0.1f);
if (ks.IsKeyDown(Keys.Up))
modelrotationX -= gameTime.ElapsedGameTime.Milliseconds *
MathHelper.ToRadians(0.1f);
if (ks.IsKeyDown(Keys.Down))
modelrotationX += gameTime.ElapsedGameTime.Milliseconds *
MathHelper.ToRadians(0.1f);
base.Update(gameTime);
}
Vector3 modelposition = Vector3.Zero;
float modelrotationX = 0.0f;
float modelrotationY = 0.0f;
protected override void Draw(GameTime gameTime)
{
graphics.GraphicsDevice.Clear(
Color.Black);
batch.Begin(SpriteBlendMode.None);
batch.Draw(background, new Rectangle(0, 0, this.Window.ClientBounds.Width,
this.Window.ClientBounds.Height), new Rectangle(0, 0, background.Width,
background.Height), Color.White, 0.0f, new Vector2(0, 0), SpriteEffects.None, 1.0f);
batch.End();
foreach (ModelMesh mesh in myModel.Meshes)
{
foreach (BasicEffect effect in mesh.Effects)
{
effect.EnableDefaultLighting();
effect.World = Matrix.CreateRotationY(modelrotationY)
* Matrix.CreateRotationX(modelrotationX)
* mesh.ParentBone.Transform * Matrix.CreateTranslation(modelposition);
effect.View = Matrix.CreateLookAt(new Vector3(0.0f, 50.0f, 6000.0f),
Vector3.Zero, Vector3.Up);
effect.Projection = Matrix.CreatePerspectiveFieldOfView(
MathHelper.ToRadians(45.0f), 640 / 480, 1.0f, 10000.0f);
}
mesh.Draw();
}
base.Draw(gameTime);
}
}
}
