createIndexBuffer method
Creates an index buffer.
Implementation
Buffer createIndexBuffer(OpenGLContextES gl, BufferAttribute bufferAttribute) {
Buffer ibo = gl.createBuffer(); // ibo stands for Index Buffer Object.
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, ibo);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, bufferAttribute.array, gl.STATIC_DRAW);
return ibo;
}