OpenGL Tesselation控制和评估着色器语法错误

Question

当我尝试编译Tesselation Control着色器和评估着色器时，我得到了语法错误。 GLSL代码与我使用的教程代码完全相同，除了核心版本。

GLSL代码：

//Control shader
#version 400 core                             
layout ( vertices = 3 ) out;                  
void main(void)                                 
{                                               
   if (gl_InvocationId == 0)                    
   {                                            
       gl_TessLevelInner[0] = 5.0;              
       gl_TessLevelOuter[0] = 5.0;              
       gl_TessLevelOuter[1] = 5.0;              
       gl_TessLevelOuter[2] = 5.0;              
   }                                            
   gl_out[gl_InvocationId].gl_Position =        
       gl_in[gl_InvocationId].gl_Position;      
}

//Evaluation shader
#version 400 core                                       
layout (triangles, equal_spacing, cw) in;                 
void main(void)                                           
{                                                         
   gl_Position = (gl_TessCoord.x * gl_in[0].gl_Position + 
                  gl_TessCoord.y * gl_in[1].gl_Position + 
                  gl_TessCoord.z * gl_in[2].gl_Position); 
}

创建功能：

tesselation_control_shader = GL.CreateShader(ShaderType.TessControlShader);
tesselation_evaluation_shader = GL.CreateShader(ShaderType.TessEvaluationShader);

编译后的错误消息：

//Control shader
WARNING: 1:1: 'layout' : symbol is deprecated in current GLSL version 
ERROR: 1:1: 'vertices' : syntax error syntax error

//Evaluation shader
WARNING: 1:1: 'layout' : symbol is deprecated in current GLSL version 
WARNING: 1:1: 'triangles' : symbol is deprecated in current GLSL version 
WARNING: 1:1: 'equal_spacing' : symbol is deprecated in current GLSL version 
WARNING: 1:1: 'cw' : symbol is deprecated in current GLSL version 
ERROR: 4:1: 'gl_Position' : undeclared identifier 
ERROR: 4:1: 'gl_TessCoord' : undeclared identifier

我不知道这有什么问题。