XNA - 如何使屏幕的一部分变暗? [英] XNA - How to dim a section of the screen?

问题描述

如何使图像(或屏幕的一部分)变暗，以便可以显示其他未变暗的内容作为焦点?抱歉，这有点模糊且难以理解，但我想不出更好的表达方式.

How would you dim an image(or a section of the screen) so that you can show something else that's not dimmed as the focus? Sorry that it's a little vague and hard to understand, but I can't think of a better way to phrase it.

推荐答案

我不知道这有多高效或多智能，但 spriteBatch.Draw 需要一种颜色来为纹理着色.您可以尝试设置一个纹理列表，并为要变暗的纹理应用较深的颜色.

I don't know how efficient or smart this is, but spriteBatch.Draw takes a color to shade textures. You could try setting up a list of textures and apply darker colors to the textures that are meant to be dimmed.

类似于:

for(int i = 0; i < texturesToDraw.Count; i++)
{
    if(i == selected) 
    {
         spriteBatch.Draw(texturesToDraw[i], position, Color.White)
    }
    else
    {
         spriteBatch.Draw(texturesToDraw[i], position, Color.SomeDarkColor)
    }
}

一个可以帮助您入门的简单教程:http://www.xnadevelopment.com/tutorials/fadeinfadeout/FadeInFadeOut.shtml

A simple tutorial that might help you get started: http://www.xnadevelopment.com/tutorials/fadeinfadeout/FadeInFadeOut.shtml

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