XNA - 中文字(各國文字)

【XNA - 中文字(各國文字)】
…
使用方式很簡單…

// 取得 Graphics
Graphics g = Graphics.FromHwnd(this.Handle);
// 先取得一個字的大小
SizeF strSize1 = g.MeasureString("一", font);
// 接著取得兩個字的大小
SizeF strSize2 = g.MeasureString("一二", font);
// 相減得字元寬度
int charWidth = (int)(strSize1.Width - strSize2.Width);

…
將pupu大大的code整理一下：

public void DrawChar(SpriteBatch spriteBatch, char c, Vector2 position, Color color)
{
         // 轉換成int
         // 事實上還要扣除掉起始字元，目前為了方便一律從'\u0000'開始
         int offset = (int)c;
         // 計算出字元位在第幾張圖
         int picIndex = offset / this.mGridPreTexture;
         // 計算出在圖中的位移量
         offset -= picIndex * this.mGridPreTexture;

         // 取得字元的 rectangle
         Rectangle rect = new Rectangle((offset % this.mTextureGrid.Width) * this.mFontSize.Width,
         (offset / this.mTextureGrid.Height) * this.mFontSize.Height,
         this.mFontSize.Width,
         this.mFontSize.Height
         );

    // 繪製
    spriteBatch.Draw(this.mFontTexture[picIndex], position, rect, color);
}

…
希望你也知道如何繪製紋理圖上的某個區塊。

public void DrawChar(SpriteBatch spriteBatch, char c, Vector2 position, Color color)
{
   // 轉換成int
   // 事實上還要扣除掉起始字元，目前為了方便一律從'\u0000'開始
   int offset = (int)c;
   // 計算出字元位在第幾張圖
   int picIndex = offset / this.mGridPreTexture;
   // 計算出在圖中的位移量
   offset -= picIndex * this.mGridPreTexture;

   // 取得字元的 rectangle
   Rectangle rect = new Rectangle((offset % this.mTextureGrid.Width) * this.mFontSize.Width,
        (offset / this.mTextureGrid.Height) * this.mFontSize.Height,
        this.mFontSize.Width,
        this.mFontSize.Height
        );

   // 繪製
   spriteBatch.Draw(this.mFontTexture[picIndex], position, rect, color);
}

XNA - SpriteBatch 與 RenderState

…
SpriteBatch.Begin Method

 GraphicsDevice.RenderState.CullMode = CullMode.CullCounterClockwiseFace;
 GraphicsDevice.RenderState.DepthBufferEnable = false;

 GraphicsDevice.RenderState.AlphaBlendEnable = true;
 GraphicsDevice.RenderState.AlphaBlendOperation = BlendFunction.Add;
 GraphicsDevice.RenderState.SourceBlend = Blend.SourceAlpha;
 GraphicsDevice.RenderState.DestinationBlend = Blend.InverseSourceAlpha;
 GraphicsDevice.RenderState.SeparateAlphaBlendEnabled = false;

 GraphicsDevice.RenderState.AlphaTestEnable = true;
 GraphicsDevice.RenderState.AlphaFunction = CompareFunction.Greater;
 GraphicsDevice.RenderState.ReferenceAlpha = 0;

 GraphicsDevice.SamplerStates[0].AddressU = TextureAddressMode.Clamp;
 GraphicsDevice.SamplerStates[0].AddressV = TextureAddressMode.Clamp;

 GraphicsDevice.SamplerStates[0].MagFilter = TextureFilter.Linear;
 GraphicsDevice.SamplerStates[0].MinFilter = TextureFilter.Linear;
 GraphicsDevice.SamplerStates[0].MipFilter = TextureFilter.Linear;

 GraphicsDevice.SamplerStates[0].MipMapLevelOfDetailBias = 0.0f;
 GraphicsDevice.SamplerStates[0].MaxMipLevel = 0;

…
RenderState的部分：

 GraphicsDevice.RenderState.DepthBufferEnable = true;
 GraphicsDevice.RenderState.AlphaBlendEnable = false;
 GraphicsDevice.RenderState.AlphaTestEnable = false;
 // 像是我會開雙面貼圖，就要加上去
 GraphicsDevice.RenderState.CullMode = CullMode.None;

SamplerStates的部分：

 GraphicsDevice.SamplerStates[0].AddressU = TextureAddressMode.Wrap;
 GraphicsDevice.SamplerStates[0].AddressV = TextureAddressMode.Wrap;

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