What is material?——Environment

3D world(3D空间)

The material environment is a 3D space, which means all objects have x, y, and z dimensions. The z-axis is perpendicularly aligned to the plane of the display, with the positive z-axis extending towards the viewer. Every sheet of material occupies a single position along the z-axis and has a standard 1dp thickness.

设计素材所在的环境是3D的空间，意味着每一个项目在设计的时候都会涉及到X,Y,Z三轴的影响。z轴是垂直向上的，z轴上的正值越大，意味着越靠近用户。素材当中的每一块位置都是沿着Z周展开的，并且标准厚度为1dp.

whatismaterial_environment_3d.png

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Light and shadow (光线和阴影)

Within the material environment, virtual lights illuminate the scene and allow objects to cast shadows. A key light creates directional shadows, while an ambient light creates consistent, soft shadows from all angles.

在原味设计的环境当中，真实的光线会将整个环境照亮并且让这个产品产生投影。一个方向的灯光会产生对应方向的投影，同时，环境的灯光也会产生从不同角度非常柔和、连续的阴影。让设计在光与投影之间更加的真实且出彩。

All shadows in the material environment are cast by these two light sources. Shadows are the absence of light resulting from the occlusion of these light sources by sheets of material at various positions along the z-axis.

全部的在原味设计环境下的阴影来源于这两种灯光资源。阴影是一种不被注意的灯光，受控于沿着Z轴的各个方向的原料的模块的来源灯光的影响。

三种类别分别是【指定方向投影】【环境灯光投影】【指定方向灯光和环境灯光的投影】

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