Original Post
Hi everyone. I'm a little behind the tutorial and I'm having trouble drawing my first triangle.
Here is my code:
Can anyone tell me why the triangle isn't being drawn? Thanks!
Here is my code:
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
namespace FirstTriangle
{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
SpriteBatch spriteBatch;
//camera
Matrix projection;
Matrix view;
VertexPositionNormalTexture[] vertices;
BasicEffect effect;
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
// TODO: Add your initialization logic here
InitializeCamera();
InitializeVertices();
effect = new BasicEffect(graphics.GraphicsDevice);
base.Initialize();
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
// TODO: use this.Content to load your game content here
}
/// <summary>
/// UnloadContent will be called once per game and is the place to unload
/// all content.
/// </summary>
protected override void UnloadContent()
{
// TODO: Unload any non ContentManager content here
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
// TODO: Add your update logic here
base.Update(gameTime);
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
// TODO: Add your drawing code here
effect.View = view;
effect.Projection = projection;
Matrix world = Matrix.Identity;
effect.World = world;
effect.EnableDefaultLighting();
foreach (EffectPass pass in effect.CurrentTechnique.Passes)
{
pass.Apply();
graphics.GraphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleList, vertices, 0, 1,
VertexPositionNormalTexture.VertexDeclaration);
}
base.Draw(gameTime);
}
private void InitializeCamera()
{
Vector3 cameraPosition = new Vector3(0,0,3);
Vector3 cameraTarget = new Vector3(0,0,0);
projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, graphics.GraphicsDevice.Viewport.AspectRatio,
0.0001f, 1000.0f);
view = Matrix.CreateLookAt(cameraPosition, cameraTarget, Vector3.Up);
}
private void InitializeVertices()
{
Vector3 position;
Vector2 textureCoordinate;
vertices = new VertexPositionNormalTexture[3];
//top left
position = new Vector3(-1, 1, 0);
textureCoordinate = new Vector2(0, 0);
vertices[0] = new VertexPositionNormalTexture(position, Vector3.Forward, textureCoordinate);
//bottom left
position = new Vector3(-1, -1, 0);
textureCoordinate = new Vector2(0, 1);
vertices[1] = new VertexPositionNormalTexture(position, Vector3.Forward, textureCoordinate);
//bottom right
position = new Vector3(1, -1, 0);
textureCoordinate = new Vector2(1, 1);
vertices[2] = new VertexPositionNormalTexture(position, Vector3.Forward, textureCoordinate);
}
}
}
Can anyone tell me why the triangle isn't being drawn? Thanks!
