WebGL的绘制原语是什么? [英] What are WebGL's draw primitives?

问题描述

我一直在使用webgl进行一些图形编程，以绘制OBJMesh，但效果不佳，因为绘制不正确.我认为那是因为我使用的是绘制图元，例如:gl.drawArrays(gl.TRIANGLE_STRIP, 0, vertexBuffer.numItems);

I've been doing some graphics programming using webgl to draw OBJMesh's, but it hasn't gone too well as it is not drawing it correctly. I think thats because of the drawing primitives that I'm using e.g : gl.drawArrays(gl.TRIANGLE_STRIP, 0, vertexBuffer.numItems);

那么我能问一下webGL允许哪些原语吗?和openGL一样吗?我一直在尝试使用gl.QUADS，因为我认为它会像openGL那样使用它，所以我不太确定.

So can I ask what primitives do webGL allow? is it the same as openGL? I've been trying to use gl.QUADS as I thought it would allow it as openGL does, so I'm not too sure anymore.

推荐答案

来自>: //www.khronos.org/registry/webgl/specs/1.0/:

const GLenum POINTS                         = 0x0000;
const GLenum LINES                          = 0x0001;
const GLenum LINE_LOOP                      = 0x0002;
const GLenum LINE_STRIP                     = 0x0003;
const GLenum TRIANGLES                      = 0x0004;
const GLenum TRIANGLE_STRIP                 = 0x0005;
const GLenum TRIANGLE_FAN                   = 0x0006;

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