我正在尝试使用 Scissoring 来剪辑使用 spriteBatch.DrawString 方法绘制的文本。
以下是我的 Draw 方法的一部分:
public override void Draw(GameTime gameTime, SpriteBatch spriteBatch)
{
...
spriteBatch.GraphicsDevice.RasterizerState = new RasterizerState();
spriteBatch.GraphicsDevice.RasterizerState.ScissorTestEnable = true;
Rectangle rectangle = new Rectangle();
rectangle.Height = 50;
rectangle.Width = 1; //set to 1 just so I'll immediately know if it's working
spriteBatch.GraphicsDevice.ScissorRectangle = rectangle;
for (int i = 0; i < career.news.Count; i++)
{
Vector2 newsItems = new Vector2(200 + i * 80, 550);
spriteBatch.DrawString(DefaultText, career.news[i], newsItems, Color.Black);
}
spriteBatch.GraphicsDevice.RasterizerState.ScissorTestEnable = false;
...
}
我收到以下错误:
“无法更改只读的 RasterizerState。State 对象在第一次绑定(bind)到 GraphicsDevice 时变为只读。要更改属性值,请创建一个新的 RasterizerState 实例。”
我不太明白,因为我在上面的代码中创建了一个新实例。我错过了什么?
编辑:修改后的代码 - 错误已删除但剪裁仍然无法正常工作:
Rectangle rectangle = new Rectangle();
rectangle.Height = 50;
rectangle.Width = 1;
RasterizerState rasterizerState = new RasterizerState();
rasterizerState.ScissorTestEnable = true;
spriteBatch.GraphicsDevice.RasterizerState = rasterizerState;
spriteBatch.GraphicsDevice.ScissorRectangle = rectangle;
for (int i = 0; i < career.news.Count; i++)
{
Vector2 newsItems = new Vector2(200 + i * 80, 550);
spriteBatch.DrawString(DefaultText, career.news[i], newsItems, Color.Black);
}
RasterizerState rasterizerState2 = new RasterizerState();
rasterizerState2.ScissorTestEnable = false;
spriteBatch.GraphicsDevice.RasterizerState = rasterizerState2;
最佳答案
这意味着您不能修改 spriteBatch.GraphicsDevice.RasterizerState
属性。您需要做的是创建一个实例,设置其属性,然后将其传递给 spriteBatch.GraphicsDevice.RasterizerState
。
RasterizerState r = new RasterizerState();
r.ScissorTestEnable = true;
spriteBatch.GraphicsDevice.RasterizerState = r;
....
RasterizerState r1 = new RasterizerState();
r1.ScissorTestEnable = false;
spriteBatch.GraphicsDevice.RasterizerState = r1;
关于c# - 在 xna 中使用 Rasterizer Scissoring 时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22311420/