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The World Background

世界(World)背景

The simplest way to use the World Buttons is to provide a nice gradient background for images. The buttons in the World Panel (Background colors) allow you to define the color at the horizon (HoR, HoG, HoB buttons) and at the zenith (ZeR, ZeG, ZeB buttons). 最简单的方式使用世界(World)按钮提供好的渐变背景。 在 世界(world) 面板 (图 2) 的滑钮允许你自定义地平线 (HoR, HoG, HoB 按钮) 和天空顶点 (ZeR, ZeG, ZeB 按钮)的颜色。

These colors are interpreted differently, according to the Buttons in the Preview Panel (Background colors): 这些颜色根据预览面板的按钮，得到不同的诠释。

• Blend - The background color is blended from horizon to zenith. If only this button is pressed, the gradient runs from the bottom to the top of the rendered image regardless of the camera orientation.

混合(Blend) - 背景色从地平线到天空顶点混合而成。如果只按下这个按钮，渲染出的图像将会从下至上呈渐变状，而并不理会摄像机的取向。

• Real - If this button is also pressed the blending is dependent on the camera orientation. The horizon color is exactly at the horizon (on the x-y plane), and the zenith color is used for points vertically above and below the camera.

真实(Real) - 如果这个按钮也被按下，混合将依据摄像机的取向。 地平线颜色精确的处在地平线(在x-y平面上)的位置， 而天空顶点颜色则使用的是在摄像机上面或下面，与之垂直的点。

• Paper - If this button is pressed the gradient occurs on the zenith-horizon-zenith colors. Thus, there are two transitions on the image, which reflect the camera rotation but which keep the horizon color to the center and the zenith color to the extremes.

纸(Paper) - 如果按下这个按钮，渐变将会呈现出上 下对称的形式。这样一来，图像上会有两个过渡，他们能反映出摄像机的旋转，但 地平线的颜色保持在中心，而天空顶点的颜色无限延伸。 The World Buttons also provide a Texture Panel with two Tabs. They are used much like the Materials textures, except for a couple of differences (Texture buttons): 世界(World)按钮还提供了一个带有两个标签的纹理(Texture)面板。 他们的使用很像是材质(Materials)纹理，除了几个区别：

• There are only six texture channels.

只有六种纹理通道。

• Texture mapping - Has only the Object and View options, with View being the default orientation.

纹理贴图(Texture mapping) - 只有 对象(Object) 和 视图(View) 选项, 默认为视图。

• Affect - Texture affects color only, but in four different ways: It can affect the Blend channel, making the Horizon color appear where the texture is non-zero; the color of the Horizon; and the color of the Zenith, up or down (ZenUp, ZenDo).

影响(Affect) - 纹理(Texture)只影响颜色，但有四种不同的方式： 它可以影响 混合(Blend) 通道，使地平线颜色出现在纹理非零的地方； 地平线(Horizon)的颜色；天空顶点的颜色，上或下(ZenUp, ZenDo)。

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