题
什么是最好的方式来创建一个差效果在部署的游戏?我想摄像机跟随我的精灵,因为它移动,跨越世界,这种方式我可以建立在影响等变焦,摇,动摇和其他影响。任何人都有一个坚实的例子如何做到这一点,最好在GameComponent?
解决方案
所以我计算出来使用上述教程的组合并已创建下面的类。它补间对你的目标,并围绕它后面。尝试。
public interface IFocusable
{
Vector2 Position { get; }
}
public interface ICamera2D
{
/// <summary>
/// Gets or sets the position of the camera
/// </summary>
/// <value>The position.</value>
Vector2 Position { get; set; }
/// <summary>
/// Gets or sets the move speed of the camera.
/// The camera will tween to its destination.
/// </summary>
/// <value>The move speed.</value>
float MoveSpeed { get; set; }
/// <summary>
/// Gets or sets the rotation of the camera.
/// </summary>
/// <value>The rotation.</value>
float Rotation { get; set; }
/// <summary>
/// Gets the origin of the viewport (accounts for Scale)
/// </summary>
/// <value>The origin.</value>
Vector2 Origin { get; }
/// <summary>
/// Gets or sets the scale of the Camera
/// </summary>
/// <value>The scale.</value>
float Scale { get; set; }
/// <summary>
/// Gets the screen center (does not account for Scale)
/// </summary>
/// <value>The screen center.</value>
Vector2 ScreenCenter { get; }
/// <summary>
/// Gets the transform that can be applied to
/// the SpriteBatch Class.
/// </summary>
/// <see cref="SpriteBatch"/>
/// <value>The transform.</value>
Matrix Transform { get; }
/// <summary>
/// Gets or sets the focus of the Camera.
/// </summary>
/// <seealso cref="IFocusable"/>
/// <value>The focus.</value>
IFocusable Focus { get; set; }
/// <summary>
/// Determines whether the target is in view given the specified position.
/// This can be used to increase performance by not drawing objects
/// directly in the viewport
/// </summary>
/// <param name="position">The position.</param>
/// <param name="texture">The texture.</param>
/// <returns>
/// <c>true</c> if the target is in view at the specified position; otherwise, <c>false</c>.
/// </returns>
bool IsInView(Vector2 position, Texture2D texture);
}
public class Camera2D : GameComponent, ICamera2D
{
private Vector2 _position;
protected float _viewportHeight;
protected float _viewportWidth;
public Camera2D(Game game)
: base(game)
{}
#region Properties
public Vector2 Position
{
get { return _position; }
set { _position = value; }
}
public float Rotation { get; set; }
public Vector2 Origin { get; set; }
public float Scale { get; set; }
public Vector2 ScreenCenter { get; protected set; }
public Matrix Transform { get; set; }
public IFocusable Focus { get; set; }
public float MoveSpeed { get; set; }
#endregion
/// <summary>
/// Called when the GameComponent needs to be initialized.
/// </summary>
public override void Initialize()
{
_viewportWidth = Game.GraphicsDevice.Viewport.Width;
_viewportHeight = Game.GraphicsDevice.Viewport.Height;
ScreenCenter = new Vector2(_viewportWidth/2, _viewportHeight/2);
Scale = 1;
MoveSpeed = 1.25f;
base.Initialize();
}
public override void Update(GameTime gameTime)
{
// Create the Transform used by any
// spritebatch process
Transform = Matrix.Identity*
Matrix.CreateTranslation(-Position.X, -Position.Y, 0)*
Matrix.CreateRotationZ(Rotation)*
Matrix.CreateTranslation(Origin.X, Origin.Y, 0)*
Matrix.CreateScale(new Vector3(Scale, Scale, Scale));
Origin = ScreenCenter / Scale;
// Move the Camera to the position that it needs to go
var delta = (float) gameTime.ElapsedGameTime.TotalSeconds;
_position.X += (Focus.Position.X - Position.X) * MoveSpeed * delta;
_position.Y += (Focus.Position.Y - Position.Y) * MoveSpeed * delta;
base.Update(gameTime);
}
/// <summary>
/// Determines whether the target is in view given the specified position.
/// This can be used to increase performance by not drawing objects
/// directly in the viewport
/// </summary>
/// <param name="position">The position.</param>
/// <param name="texture">The texture.</param>
/// <returns>
/// <c>true</c> if [is in view] [the specified position]; otherwise, <c>false</c>.
/// </returns>
public bool IsInView(Vector2 position, Texture2D texture)
{
// If the object is not within the horizontal bounds of the screen
if ( (position.X + texture.Width) < (Position.X - Origin.X) || (position.X) > (Position.X + Origin.X) )
return false;
// If the object is not within the vertical bounds of the screen
if ((position.Y + texture.Height) < (Position.Y - Origin.Y) || (position.Y) > (Position.Y + Origin.Y))
return false;
// In View
return true;
}
}
这是你将如何与SpriteBatch
使用它:
spriteBatch.Begin(SpriteBlendMode.AlphaBlend,
SpriteSortMode.FrontToBack,
SaveStateMode.SaveState,
Camera.Transform);
spriteBatch.Draw(_heliTexture,
_heliPosition,
heliSourceRectangle,
Color.White,
0.0f,
new Vector2(0,0),
0.5f,
SpriteEffects.FlipHorizontally,
0.0f);
spriteBatch.End();
让我知道如果这能帮助你,并感谢StackOverflow的和社会的。 W00t!
其他提示
我知道这是一个老问题,但我有同样的一个,我发现这个伟大的Monogame相机库,所以我想我应该分享...
https://github.com/aloisdeniel/Comora
这是安装并跟随精灵,你只需要添加很容易
this.camera.Position =你的精灵的位置;
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