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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);
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.
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The mode Parameter void drawElements(enum mode, long count, enum type, long offset); void drawArrays(enum mode, int first, long count);
In OpenGL, an object is made up of geometric primitives such as triangle, quad, line segment and point. A primitive is made up of one or more vertices. OpenGL supports the following primitives: A geometric primitive is defined by specifying its vertices via glVertex function, enclosed within a pair glBegin and glEnd .
As mentioned in how it works WebGL requires 2 shaders every time you draw something. A vertex shader and a fragment shader. Each shader is a function.
From https://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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