Hy everyone, so I made this Camera class, and can't find nothing wrong with it,

so please take a quick look at it:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace Killer
{
    class Camera
    {       
        protected float zoom;
        protected Matrix transform;
        protected Viewport viewport;
        Vector2 center;

        public Matrix Transform
        {
            get { return transform; }
            set { transform = value; }
        }        
        
        public Camera(Viewport viewport)
        {
            zoom = 1.0f;
            this.viewport = viewport;
        }
        
        public void Update()
        {
            // Center - center of window, with player in center of window, window size: 800x600
            center = new Vector2(Player.playerPos.X + (EntityAnimation.rectangle.Width / 2) - 400,
                                 Player.playerPos.Y + (EntityAnimation.rectangle.Height / 2) - 300);
            // center.X = playerposition.X + frameWidth/2 - 400
            // center.X = 100 + 24 - 400
            // center.Y = playerposition.Y + frameHeight/2 - 300
            // center.Y = 100 + 24 - 300
            transform = Matrix.CreateScale(new Vector3(zoom, zoom, 0)) 
                        * Matrix.CreateTranslation(new Vector3(-center.X, -center.Y, 0));
        }        
    }
}

I putted some comments so you would know what values are at first when game is freshly run, now in my

Game1.cs (main XNA game file) I made a simple global variable:

Camera cam;

And in Game1.cs Initialize() method:

cam = new Camera(GraphicsDevice.Viewport);

and last but not least, here are my 2 draw methods in Game1.cs:

protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.White);
            spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, null, null, null, null, cam.Transform);
            // Player
            player.PlayerAnimation.PlayerDraw(spriteBatch);

            spriteBatch.End();
            DrawHud(gameTime);
            base.Draw(gameTime);
        }
        protected void DrawHud(GameTime gameTime)
        {
            spriteBatch.Begin();
            // Player Related Drawing --------------------------------------------------------------------
            player.playerStamina.DrawStatHelpers(spriteBatch, gameTime); // Stamina Help Messages, also Player.X and Player.Y
            player.playerStamina.DrawBar(spriteBatch); // Stamina Health Bar            
            //--------------------------------------------------------------------------------------------           
            spriteBatch.End();
        }

Now, when I build and run, I cant see my player, just my HUD,

BUT if I put player.PlayerAnimation.PlayerDraw(spriteBatch); in DrawHud() I can see him.

I dont know what is wrong with my Camera, please help if you can :)

Thanks a lot for some explanations.

One weird thing yeh I forgot to put cam.Update(); in my Game1.cs Update() method hahah, but after doing that the problem was still there.

Well and I replaced my code for camera update with yours, and I made one DrawHelper() function in my camera class which draws the position X and Y of my player, and camera uses right position values, so nothing wrong about that.

 graphics.PreferredBackBufferHeight = 600;
 graphics.PreferredBackBufferWidth = 800;

This were my screen W & H, but I guess it doesn't matter now cause I use your Camera Update() now.

I will now guide you through my code creation:

1. I made an EntityAnimation class and putted all animation related stuff there - works fine.

2. I made a Player class, in which there is all logic about my player movement

3. I made Stats interface that contains Stamina class and does stamina-related stuff

and In my Game1.cs I draw stamina bar in seperate spriteBatch than the one that camera uses.(code in the post above)

So the stamina is shown, but the player is not.

4. After that Stats and Stamina I created Camera class, and well then the problem started, and well

if I put player.PlayerAnimation.PlayerDraw(spriteBatch); in DrawHud() I can see him, if it stays in spriteBatch that camera is in( in Draw() ),

then I dont.

5. Again, the player position that I am passing to cam.transform are correct, and I know this becouse I made one Draw method in Camera class that

outputs used player.position variables in a text, and they change when when I walk, and the start position is the same.

I dont know what else would be usefull information to you guys to help me. here is how my Camera class looks like right now:

class Camera
    {       
        protected float zoom;
        protected Matrix transform;
        protected Viewport viewport;        

        public Matrix Transform
        {
            get { return transform; }
            set { transform = value; }
        }        
        
        public Camera(Viewport viewport)
        {
            zoom = 1.0f;
            this.viewport = viewport;
        }
        
        public void Update()
        {
            transform = Matrix.CreateTranslation(-Player.playerPos.X, -Player.playerPos.Y, 0) *
                        Matrix.CreateScale(zoom, zoom, 0) * 
                        Matrix.CreateTranslation(this.viewport.Width / 2, this.viewport.Height / 2, 0);
        }

        public void DrawHelpers(SpriteBatch sp)
        {
            sp.DrawString(StatManager.statMessage, "Player.X:" + Player.playerPos.X + "Player.Y:" + Player.playerPos.Y, 
                          new Vector2(50, 90), Color.Black);
        }
        
    }

and again, I have camera Initialized and Updated in my Game1.cs, and well ofcourse Drawn xD but yeah I cant see nothing. :(

PS. I didnt copy those using System.blabla and Microsoft.Xna.blabla so the code would be shorter but it is there in my code ofc,

Im looking forward your help, good people ;)

IT IS FIXED. I simply had to remove this line from my Draw():

GraphicDevice.Clear(Color.White);

Does anyone know if it is a right thing to remove this line completley from my game?

Will it maybe produce some negative effects or no?