creator2.1.2 camera实现节点快照GL报错

@visow 写道：

• Creator 版本：2.1.2

• 目标平台： web

• 详细报错信息，包含调用堆栈：
  

  ======>控制台输出如下：
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]
  [.WebGL-0000019C44A5ACE0] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture. [http://localhost:7456/?accountTest=true]

• 重现方式：
  如下函数为实现节点快照：
  

      public static snapshotNode(node: cc.Node, cullingMask?: number): cc.Node {
          let snapNode = new cc.Node();
          snapNode.parent = cc.director.getScene();
          snapNode.position = node.position;
          let camera = node.addComponent(cc.Camera);
          camera.cullingMask = cullingMask || 0xffffffff;
          let texture = new cc.RenderTexture();
          let gl = cc.game._renderContext;
          texture.initWithSize(node.width, node.height, gl.STENCIL_INDEX8);
          camera.targetTexture = texture;
          camera.render(node);
  
          let spriteFrame = new cc.SpriteFrame(texture);
          let outNode = new cc.Node();
          let sprite = outNode.addComponent(cc.Sprite);
          sprite.spriteFrame = spriteFrame;
          outNode.scaleY = -1;
          snapNode.destroy();
          snapNode = null;
          return outNode;
      }

• 出现概率：100%

• 额外线索：

帖子： 1

参与者： 1

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