如何使用opengl制作2D地形?

问题描述

我想制作一个只有一些颠簸和高度变化的简单2D地形:

I want to make a simple 2d terrain with just a few bumps and height changes:

我考虑过仅使用随机数来描述某个顶点的高度，但是我看不到如何从中制作一个网格.我正在寻找一种查找地形的顶点和索引缓冲区的方法.
我该怎么做?

I thought about just using random numbers to describe the height of a certain vertex, but I don't see how I can make one mesh from this. I'm looking for a way to find the vertex and indices buffers for the terrain.
How do I do this?

推荐答案

您可以只使用GL_POLYGON并在视图下方包含所有顶点的列表，其中第一个和最后一个顶点为

You could just use GL_POLYGON with a list of all the vertices with the first and last vertice below the view.

如果要使用三角形网格，则必须在每个高度点(视线之外)的正下方创建一个点，然后图案(用于顺时针排序)将是:

if you want to use a triangle mesh you'll have to create a point directly below each height point(out of view) then the pattern(for clockwise ordering) would be:

for (number of height points-1)
    //vertices
     vertice below height;
     height vertice;
     next_height vertice;

     next height vertice;
     vertice below next height;
     vertice below height;

然后计算索引取决于您存储顶点的方式，但是数组中会有类似的模式.

then working out the indices depends on how you store the vertices, but there will be a similar pattern in the array.

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