meta-next/src/mesh/Mesh.js

import Engine from "../Engine"

class Mesh
{
	constructor(buffer, indices)
	{
		const gl = Engine.gl

		this.buffer = gl.createBuffer()
		gl.bindBuffer(gl.ARRAY_BUFFER, this.buffer)
		gl.bufferData(gl.ARRAY_BUFFER, buffer, gl.DYNAMIC_DRAW)

		this.stride = buffer.length
		
		if(indices) {
			this.numElements = 6
			this.indices = gl.createBuffer()
			gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.indices)
			gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.DYNAMIC_DRAW)
		}
		else {
			this.numElements = 0
			this.indices = null
		}
	}

	upload(buffer)
	{
		const gl = Engine.gl

		this.stride = buffer.length
		gl.bindBuffer(gl.ARRAY_BUFFER, this.buffer)
		gl.bufferData(gl.ARRAY_BUFFER, buffer, gl.DYNAMIC_DRAW)
	}

	uploadIndices(indices, numElements)
	{
		const gl = Engine.gl

		this.numElements = numElements
		gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.indices)
		gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.DYNAMIC_DRAW)
	}
}

export default Mesh