观察者设计模式的更新方法(Update method of Observer Design Pattern)

 我觉得你有错误： 
 
vec3 NormalPosition_cameraspace = ( V * M * vec4(vertexNormal,1)).xyz;
Normal_cameraspace = -NormalPosition_cameraspace;
 
 您应该使用0作为第四个组件（而不是1）从vertexNormal构造一个vec4。 这实际上意味着在乘以模型/视图矩阵时忽略任何转换。 这是你想要的，因为法线代表一个方向，而不是一个位置。 
 
 另外，我不明白这个计算： 
 
LightDirection_cameraspace = LightPosition_cameraspace + EyeDirection_cameraspace;
 
 不应该是这样的： 
 
LightDirection_cameraspace = LightPosition_cameraspace - vertexPosition_cameraspace;

I think you have an error here:
 
vec3 NormalPosition_cameraspace = ( V * M * vec4(vertexNormal,1)).xyz;
Normal_cameraspace = -NormalPosition_cameraspace;
 
You should construct a vec4 from vertexNormal using 0 as the fourth component (not 1). This effectively means that any translation is ignored when multiplying by your model/view matrices. This is what you want because the normal represents a direction, not a position.
 
Also, I don't understand this calculation:
 
LightDirection_cameraspace = LightPosition_cameraspace + EyeDirection_cameraspace;
 
Shouldn't this be something like:
 
LightDirection_cameraspace = LightPosition_cameraspace - vertexPosition_cameraspace;