2019-12-08 14:38:26 +00:00
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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using Microsoft.Xna.Framework.Input;
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using System;
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namespace Jumpy {
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class Player {
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enum Facing { Left, Right };
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2019-12-08 15:44:43 +00:00
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enum Pose { Walking, Standing, Crouching, Stretching, SwordSwing, Jumping };
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enum AirState { Jumping, Ground };
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2019-12-08 14:38:26 +00:00
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private const int spriteSize = 144;
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private const int spriteWidth = 20;
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private const int moveSpeed = 600;
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2019-12-08 15:44:43 +00:00
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private const int jumpSpeed = 1800;
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private const int gravity = 6000;
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2019-12-08 14:48:29 +00:00
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private Texture2D texture;
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2019-12-08 14:38:26 +00:00
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// TODO: stop assuming 1920x1080.
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2019-12-08 16:51:50 +00:00
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private const int groundLevel = 1080 - spriteSize / 2 - 200;
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private Vector2 position = new Vector2(200, groundLevel);
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private Facing facing = Facing.Right;
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private Pose pose = Pose.Standing;
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private AirState airState = AirState.Ground;
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private double swordSwingTime = 0;
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2019-12-08 15:44:43 +00:00
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private double jumpTime = 0;
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private double ySpeed = 0;
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2019-12-08 14:38:26 +00:00
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public Player(Texture2D texture) {
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this.texture = texture;
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}
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2019-12-08 14:48:29 +00:00
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public void Update(GameTime gameTime, GamePadState gamePad) {
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if (gamePad.Buttons.A == ButtonState.Pressed && airState == AirState.Ground) {
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pose = Pose.Jumping;
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airState = AirState.Jumping;
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jumpTime = 0.5;
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ySpeed = -jumpSpeed;
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return;
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}
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2019-12-08 14:48:29 +00:00
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if (gamePad.Buttons.X == ButtonState.Pressed && swordSwingTime <= 0) {
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pose = Pose.SwordSwing;
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swordSwingTime = 0.3;
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2019-12-08 14:48:29 +00:00
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return;
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}
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Vector2 leftStick = gamePad.ThumbSticks.Left;
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2019-12-08 14:58:56 +00:00
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if (gamePad.DPad.Left == ButtonState.Pressed || leftStick.X < -0.5) {
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facing = Facing.Left;
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pose = Pose.Walking;
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position.X -= moveSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds;
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} else if (gamePad.DPad.Right == ButtonState.Pressed || leftStick.X > 0.5) {
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facing = Facing.Right;
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pose = Pose.Walking;
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position.X += moveSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds;
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} else if (gamePad.DPad.Down == ButtonState.Pressed || leftStick.Y < -0.5) {
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pose = Pose.Crouching;
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} else if (gamePad.DPad.Up == ButtonState.Pressed || leftStick.Y > 0.5) {
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pose = Pose.Stretching;
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} else {
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pose = Pose.Standing;
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}
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2019-12-08 15:44:43 +00:00
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if (jumpTime > 0) {
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jumpTime -= gameTime.ElapsedGameTime.TotalSeconds;
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}
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if (swordSwingTime > 0) {
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swordSwingTime -= gameTime.ElapsedGameTime.TotalSeconds;
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pose = Pose.SwordSwing;
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}
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2019-12-08 15:44:43 +00:00
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if (airState == AirState.Jumping) {
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position.Y += (float)(ySpeed * gameTime.ElapsedGameTime.TotalSeconds);
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ySpeed += gravity * (float)gameTime.ElapsedGameTime.TotalSeconds;
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if (position.Y > groundLevel) {
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position.Y = groundLevel;
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ySpeed = 0;
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airState = AirState.Ground;
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}
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}
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if (airState == AirState.Jumping && pose != Pose.SwordSwing) {
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pose = Pose.Jumping;
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}
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2019-12-08 14:38:26 +00:00
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position.X = Math.Min(Math.Max(position.X, 0 + spriteWidth), 1920 - spriteWidth);
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}
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private Point spritePosition(Pose pose, GameTime time) {
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switch (pose) {
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case Pose.Walking:
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int frameNum = (time.TotalGameTime.Milliseconds / 125) % 4;
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if (frameNum == 3) {
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frameNum = 1;
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}
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return new Point(spriteSize * frameNum + spriteSize * 6, 0);
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case Pose.Crouching:
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return new Point(spriteSize * 7, spriteSize * 2);
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case Pose.Stretching:
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return new Point(spriteSize * 1, spriteSize * 2);
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case Pose.Jumping:
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if (jumpTime > 0.25) {
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return new Point(spriteSize * 6, spriteSize);
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} else if (jumpTime > 0) {
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return new Point(spriteSize * 7, spriteSize);
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} else {
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return new Point(spriteSize * 8, spriteSize);
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}
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case Pose.SwordSwing:
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if (swordSwingTime > 0.2) {
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return new Point(spriteSize * 3, 0);
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} else if (swordSwingTime > 0.1) {
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return new Point(spriteSize * 4, 0);
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} else {
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return new Point(spriteSize * 5, 0);
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}
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case Pose.Standing:
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default:
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return new Point(spriteSize * 7, 0);
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}
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}
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public void Draw(GameTime time, SpriteBatch spriteBatch) {
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Point source = spritePosition(pose, time);
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Rectangle textureSource = new Rectangle(source.X, source.Y, spriteSize, spriteSize);
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Vector2 spriteCenter = new Vector2(spriteSize / 2, spriteSize / 2);
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SpriteEffects effect = facing == Facing.Right ?
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SpriteEffects.FlipHorizontally : SpriteEffects.None;
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spriteBatch.Draw(texture, position, textureSource, Color.White, 0f, spriteCenter,
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Vector2.One, effect, 0f);
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}
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}
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}
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