我正在WebGL上工作，并且我已經制作了一些類以使渲染更容易。問題是，只能呈現第一個類，而所有其他類都不會呈現。我查找了每個數組緩沖區，并在需要時綁定和解綁它們，但它仍然不起作用。這是我針對三角形元素簇的類：function TriangleElementCluster(vertices, uvs, normals, indices, indicesLenght, shader, gl) {  shader.use();  var verticesBuffer = new ArrayBufferFloat(vertices, gl);  var verticesAttribLocation = new VertexAttribPointerFloat(shader.getProgram(), "vertex", 3, 3, 0, gl);  var uvsBuffer = new ArrayBufferFloat(uvs, gl);  var uvsAttribLocation = new VertexAttribPointerFloat(shader.getProgram(), "uv", 2, 2, 0, gl);  var normalsBuffer = new ArrayBufferFloat(normals, gl);  var normalsAttribLocation = new VertexAttribPointerFloat(shader.getProgram(), "normal", 3, 3, 0, gl);  var indicesBuffer = new ElementArrayBuffer16(indices, gl);  verticesBuffer.unbind();  verticesAttribLocation.unbind();  uvsBuffer.unbind();  uvsAttribLocation.unbind();  normalsBuffer.unbind();  normalsAttribLocation.unbind();  indicesBuffer.unbind();  this.setTexture = function(texture) {    this.texture = texture;  }  this.render = function() {    verticesBuffer.bind();    verticesAttribLocation.bind();    uvsBuffer.bind();    uvsAttribLocation.bind();    normalsBuffer.bind();    normalsAttribLocation.bind();    indicesBuffer.bind();    this.texture.activate(gl.TEXTURE0);    gl.drawElements(gl.TRIANGLES, indicesLenght, gl.UNSIGNED_SHORT, 0);    verticesBuffer.unbind();    verticesAttribLocation.unbind();    uvsBuffer.unbind();    uvsAttribLocation.unbind();    normalsBuffer.unbind();    normalsAttribLocation.unbind();    indicesBuffer.unbind();  }}你可能已經注意到，我打印了VertexAttribPointer的ID，我得到：我有兩個類，它們都使用相同的指針，這不應該發生，什么會導致這種情況？2 0 1  2 0 1根據我對OpenGL的理解，每個緩沖區等在繪制三角形后都會被停用。導致只繪制第一個類的錯誤在哪里？