Better way to load level content in XNA?
- by user2002495
Currently I loaded all my assets in XNA in the main Game class. What I want to achieve later is that I only load specific assets for specific levels (the game will consist of many levels). Here is how I load my main assets into the main class:
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
plane = new Player(Content.Load<Texture2D>(@"Player/playerSprite"), 6, 8);
plane.animation = "down";
plane.pos = new Vector2(400, 500);
plane.fps = 15;
Global.currentPos = plane.pos;
lvl1 = new Level1(Content.Load<Texture2D>(@"Levels/bgLvl1"), Content.Load<Texture2D>(@"Levels/bgLvl1-other"),
new Vector2(0, 0), new Vector2(0, -600));
CommonBullet.LoadContent(Content);
CommonEnemyBullet.LoadContent(Content);
}
protected override void UnloadContent()
{
}
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
plane.Update(gameTime);
lvl1.Update(gameTime);
foreach (CommonEnemy ce in cel)
{
if (ce.CollidesWith(plane))
{
ce.hasSpawn = false;
}
foreach (CommonBullet b in plane.commonBulletList)
{
if (b.CollidesWith(ce))
{
ce.hasSpawn = false;
}
}
ce.Update(gameTime);
}
LoadCommonEnemy();
base.Update(gameTime);
}
private void LoadCommonEnemy()
{
int randY = rand.Next(-600, -10);
int randX = rand.Next(0, 750);
if (cel.Count < 3)
{
cel.Add(new CommonEnemy(Content.Load<Texture2D>(@"Enemy/Common/commonEnemySprite"), 7, 2, "left", randX, randY));
}
for (int i = 0; i < cel.Count; i++)
{
if (!cel[i].hasSpawn)
{
cel.RemoveAt(i);
i--;
}
}
}
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.Black);
spriteBatch.Begin();
lvl1.Draw(spriteBatch);
plane.Draw(spriteBatch);
foreach (CommonEnemy ce in cel)
{
ce.Draw(spriteBatch);
}
spriteBatch.End();
base.Draw(gameTime);
}
I wish to load my players, enemies, all in Level1 class. However, when I move my player & enemy code into the Level1 class, the gameTime returns null. Here is my Level1 class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Media;
using Microsoft.Xna.Framework.Input;
using SpaceShooter_Beta.Animation.PlayerCollection;
using SpaceShooter_Beta.Animation.EnemyCollection.Common;
namespace SpaceShooter_Beta.Levels
{
public class Level1
{
public Texture2D bgTexture1, bgTexture2;
public Vector2 bgPos1, bgPos2;
public float speed = 5f;
Player plane;
public Level1(Texture2D texture1, Texture2D texture2, Vector2 pos1, Vector2 pos2)
{
this.bgTexture1 = texture1;
this.bgTexture2 = texture2;
this.bgPos1 = pos1;
this.bgPos2 = pos2;
}
public void LoadContent(ContentManager cm)
{
plane = new Player(cm.Load<Texture2D>(@"Player/playerSprite"), 6, 8);
plane.animation = "down";
plane.pos = new Vector2(400, 500);
plane.fps = 15;
Global.currentPos = plane.pos;
}
public void Draw(SpriteBatch sb)
{
sb.Draw(bgTexture1, bgPos1, Color.White);
sb.Draw(bgTexture2, bgPos2, Color.White);
plane.Draw(sb);
}
public void Update(GameTime gt)
{
bgPos1.Y += speed; bgPos2.Y += speed;
if (bgPos1.Y >= 600)
{
bgPos1.Y = -600;
}
if (bgPos2.Y >= 600)
{
bgPos2.Y = -600;
}
plane.Update(gt);
}
}
}
Of course when I did this, I delete all my player's code in the main Game class. All of that works fine (no errors) except that the game cannot start. The debugger says that plane.Update(gt); in Level 1 class has null GameTime, same thing with the Draw method in the Level class.
Please help, I appreciate for the time.
[EDIT] I know that using switch in the main class can be a solution. But I prefer a cleaner solution than that, since using switch still means I need to load all the assets through the main class, the code will be A LOT later on for each levels
