Opengl超级宝典 第七章CubeMapped着色器部分编译错误

SkyBox 的着色器

// Skybox Shader
// Vertex Shader
// Richard S. Wright Jr.
// OpenGL SuperBible
#version 120

// Incoming per vertex... just the position
attribute vec4 vVertex;

uniform mat4   mvpMatrix;  // Transformation matrix

// Texture Coordinate to fragment program
varying vec3 vVaryingTexCoord;

void main(void) 
    {
    // Pass on the texture coordinates 
    vVaryingTexCoord = normalize(vVertex.xyz);

    // Don't forget to transform the geometry!
    gl_Position = mvpMatrix * vVertex;
    }

// Skybox Shader
// Fragment Shader
// Richard S. Wright Jr.
// OpenGL SuperBible
#version 120

uniform samplerCube cubeMap;

varying vec3 vVaryingTexCoord;

void main(void)
    {
    gl_FragColor = textureCube(cubeMap, vVaryingTexCoord);
    }
    
Reflection的着色器

// Reflection Shader
// Vertex Shader
// Richard S. Wright Jr.
// OpenGL SuperBible
#version 120

// Incoming per vertex... position and normal
attribute vec4 vVertex;
attribute vec3 vNormal;

uniform mat4   mvpMatrix;
uniform mat4   mvMatrix;
uniform mat3   normalMatrix;
uniform mat4   mInverseCamera;

// Texture coordinate to fragment program
varying vec3 vVaryingTexCoord;

void main(void) 
    {
    // Normal in Eye Space
    vec3 vEyeNormal = normalMatrix * vNormal;
    
    // Vertex position in Eye Space
    vec4 vVert4 = mvMatrix * vVertex;
    vec3 vEyeVertex = normalize(vVert4.xyz / vVert4.w);
    
    // Get reflected vector
    vec4 vCoords = vec4(reflect(vEyeVertex, vEyeNormal), 1.0);
   
    // Rotate by flipped camera
    vCoords = mInverseCamera * vCoords;
    vVaryingTexCoord.xyz = normalize(vCoords.xyz);

    // Don't forget to transform the geometry!
    gl_Position = mvpMatrix * vVertex;
    }

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// Reflection Shader
// Fragment Shader
// Richard S. Wright Jr.
// OpenGL SuperBible
#version 120

uniform samplerCube cubeMap;
varying vec3 vVaryingTexCoord;

void main(void)
    { 
    gl_FragColor = textureCube(cubeMap, vVaryingTexCoord.stp);
    }