使用GLSL创建地形/轮廓线-WebGL [英] Create topography/contour lines with GLSL - WebGL

问题描述

我想通过类似于本文中描述的过程的几何图形来切割水平轮廓线-

I want to slice horizontal contour lines through a geometry similar to the process described in this post - How to create latitudinal (horizontal) contour lines in GLSL?

我正在使用WebGL进行此操作，看来"fwidth"仅适用于OpenGL.是否有可用的解决方法，以便我可以从Web上的fwidth获得抗锯齿功能?

I'm doing this with WebGL, and it seems that "fwidth" is only available for OpenGL. Is there an available workaround so that I can get the anti-aliasing from fwidth on the web?

推荐答案

fwidth函数可通过WebGL使用，只需使用

The fwidth function is available using WebGL, you just have to use the OES_standard_derivatives extension by running:

var ext = gl.getExtension("OES_standard_derivatives");
if (!ext) {
  // tell user they can't use your site or provide
  // other fallback
}

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