xna - Texture2d の座標?

Question

class の幅と高さを取得できることは知ってTexture2dいますが、x 座標と y 座標を取得できないのはなぜですか? それらまたは何かのために別の変数を作成する必要がありますか? 大変な作業のようです。

Answer 1

Vector2-object と関連付けて -object を使用する必要がありますTexture2D。オブジェクト自体にTexture2Dは座標がありません。
テクスチャを描画する場合は、描画するのに が必要ですがSpriteBatch、これはVector2D座標を決定するのに が必要です。

public void Draw (
     Texture2D texture,
     Vector2 position,
     Color color
)

これはMSDNから取得されます。

したがって、作成するか、struct

struct VecTex{

    Vector2 Vec;
    Texture2D Tex;

}

またはさらに処理が必要な場合はクラス。

Answer 2

A Texture2D object alone doesn't have any screen x and y coordinates.
In order to draw a texture on the screen, you must either set it's position by using a Vector2 or a Rectangle.

Here's an example using Vector2:

private SpriteBatch spriteBatch;
private Texture2D myTexture;
private Vector2 position;

// (...)

protected override void LoadContent()
{
    // Create a new SpriteBatch, which can be used to draw textures.
    spriteBatch = new SpriteBatch(GraphicsDevice);

    // Load the Texture2D object from the asset named "myTexture"
    myTexture = Content.Load<Texture2D>(@"myTexture");

    // Set the position to coordinates x: 100, y: 100
    position = new Vector2(100, 100);
}

protected override void Draw(GameTime gameTime)
{
    spriteBatch.Begin();
    spriteBatch.Draw(myTexture, position, Color.White);
    spriteBatch.End();
}

And here's an example using Rectangle:

private SpriteBatch spriteBatch;
private Texture2D myTexture;
private Rectangle destinationRectangle;

// (...)

protected override void LoadContent()
{
    // Create a new SpriteBatch, which can be used to draw textures.
    spriteBatch = new SpriteBatch(GraphicsDevice);

    // Load the Texture2D object from the asset named "myTexture"
    myTexture = Content.Load<Texture2D>(@"myTexture");

    // Set the destination Rectangle to coordinates x: 100, y: 100 and having
    // exactly the same width and height of the texture
    destinationRectangle = new Rectangle(100, 100,
                                         myTexture.Width, myTexture.Height);
}

protected override void Draw(GameTime gameTime)
{
    spriteBatch.Begin();
    spriteBatch.Draw(myTexture, destinationRectangle, null, Color.White);
    spriteBatch.End();
}

The main difference is that by using a Rectangle you are able to scale your texture to fit the destination rectangle's width and height.

You can find some more information about the SpriteBatch.Draw method at MSDN.