SRL Archive - C/C++ Help and Tutorials

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 MarioGame
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
       //spriteFont spriteFont = new SpriteFont();
        Texture2D marioPic;
        Vector2 spritePosition = new Vector2(100, 123);
        KeyboardState oldKey = Keyboard.GetState();
        private GameTime gameTime = new GameTime();

        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

            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);
            marioPic = Content.Load<Texture2D>("Mario");
            // 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
        }

        void updateJump(GameTime gametime)
        {
            float startPos = spritePosition.Y + 5;
            float endPos = spritePosition.Y;
            while (startPos - spritePosition.Y != 0){
                spritePosition.Y -= 1;
                base.Update(gametime);
            }
            while (endPos - spritePosition.Y != 0)
            {
                spritePosition.Y += 1;
                base.Update(gametime);
            }

        }


       
       

        /// <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();
            KeyboardState newKeys = Keyboard.GetState();
            if (newKeys.IsKeyDown(Keys.Right))
            {
                spritePosition.X += 1;
            }
            if (newKeys.IsKeyDown(Keys.Left))
            {
                spritePosition.X -= 1;
            }
            if (newKeys.IsKeyDown(Keys.Up))
            {
                updateJump(gameTime);
                
            }
                

            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.Black);
           
            spriteBatch.Begin(SpriteSortMode.BackToFront, BlendState.AlphaBlend);
            spriteBatch.Draw(marioPic, spritePosition, Color.White);
          //  spriteBatch.DrawString(spriteFont, "Mario!", new Vector2(10, 10), Color.White);
                
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}

Ok so here's the code, how do I go about making my mario character to jump?

When you press the up key, have the character move on the Y axis.

If you've already implemented gravity you won't have to worry about anything else.

(didn't read the code by the way, just saying)

From: Capricorn
When you press the up key, have the character move on the Y axis.

If you've already implemented gravity you won't have to worry about anything else.

(didn't read the code by the way, just saying)

How would I implement gravity?

LINK

Check the link, you should really get active on those forums mainly because a lot of the people there know more about this stuff than I.

Try this:

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 MarioGame
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
       //spriteFont spriteFont = new SpriteFont();
        Texture2D marioPic;
        Vector2 spritePosition = new Vector2(100, 123);
        KeyboardState oldKey = Keyboard.GetState();
        private GameTime gameTime = new GameTime();
        private float YSpeed = 0;        //I would try a float, you could change it if it doesn't work !Pixel per second!

        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

            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);
            marioPic = Content.Load<Texture2D>("Mario");
            // 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();
            KeyboardState newKeys = Keyboard.GetState();
            if (newKeys.IsKeyDown(Keys.Right))
            {
                spritePosition.X += 1;
            }
            if (newKeys.IsKeyDown(Keys.Left))
            {
                spritePosition.X -= 1;
            }
            if (newKeys.IsKeyDown(Keys.Up))
            {
                YSpeed -= 50;    //You want to adjust this to taste
            }

            //gravity magic, not natural ;)   you might want to adjust the number 0.3 and place it in a constant
            YSpeed += 12;    
            
            if(CollisionWithFloor)
            {
                YSpeed = 0;
            }

            spritePosition.Y += YSpeed * gameTime.elapsedGameTime / 1000;
            
                

            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.Black);
           
            spriteBatch.Begin(SpriteSortMode.BackToFront, BlendState.AlphaBlend);
            spriteBatch.Draw(marioPic, spritePosition, Color.White);
          //  spriteBatch.DrawString(spriteFont, "Mario!", new Vector2(10, 10), Color.White);
                
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}

edit: forgot to mention. I haven't programmed in this language before so it may contain some bugs. Would like to hear a reply ;)

E: fix

Got it!

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 Gravity
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        Texture2D marioPic, woodPic;
        SpriteFont verdanaFont;
        Vector2 spritePos;
        KeyboardState oldKey = Keyboard.GetState();
        Monster testMonster = new Monster(0, 480,1);

        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

            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);
            marioPic = Content.Load<Texture2D>("Mario");
            woodPic = Content.Load<Texture2D>("Wood");
            verdanaFont = Content.Load<SpriteFont>("Veridica");
            spritePos = new Vector2(10, (graphics.GraphicsDevice.Viewport.Height - marioPic.Height));
            // 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
        }

        bool isOnBottom()
        {
            return ((spritePos.Y + marioPic.Height) >= graphics.GraphicsDevice.Viewport.Height);
        }

        /// <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();
            KeyboardState newKey = Keyboard.GetState();
            if (newKey.IsKeyDown(Keys.Up))
            {
                if (isOnBottom())
                    for (int i = 0; i < 50; i++)
                    {
                        spritePos.Y -= 1;
                        base.Update(gameTime);
                    }
            }
            if (!isOnBottom())
            {
                spritePos.Y += 4;
            }
            if (newKey.IsKeyDown(Keys.Right))
            {
                spritePos.X += 1;
            }
            if (newKey.IsKeyDown(Keys.Left))
            {
                spritePos.X -= 1;
            }

            updateMoster(testMonster);

            base.Update(gameTime);
        }

        void updateMoster(Monster monster)
        {
            monster.updateMonster();
        }
        /// <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);

            spriteBatch.Begin(SpriteSortMode.BackToFront, BlendState.AlphaBlend);
            spriteBatch.Draw(marioPic, spritePos, Color.White);
            spriteBatch.Draw(marioPic, testMonster.getPos(), Color.White); 
            spriteBatch.DrawString(verdanaFont, Convert.ToString(isOnBottom()), new Vector2(10, 10), Color.White);
            spriteBatch.DrawString(verdanaFont, "Sprite Pos " + testMonster.getPos().X + " , " + (testMonster.getPos().Y - marioPic.Height), new
Vector2(100, 100), Color.Black);
            spriteBatch.DrawString(verdanaFont, "Sprite Pos " + testMonster.getPos().X + " , " + (testMonster.getPos().Y + marioPic.Height), new
 Vector2(200, 200), Color.Black);
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}