QT中的Phong着色编译错误 [英] Phong shading compile error in QT

问题描述

我在QT 5.2中使用着色器。我正在关注phong着色模型。

当我编译着色代码时，它显示了一些错误，例如

Hi,
I am using shaders in QT 5.2. I am following phong shading model.
When I compile my shading code, it is showing some errors like

ERROR: 0:70: '<' : syntax error syntax error\n\n
ERROR: 0:35: '<' : syntax error syntax error\n\n
ERROR: 0:25: '<' : syntax error syntax error\n\n
ERROR: 0:24: '<' : syntax error syntax error\n\n

但我的部分颜色和背景颜色变成深紫色。



任何人都可以帮我解决这个问题。



着色器代码



顶点着色器代码

but my part color and background color are becoming dark purple.

can anyone help me in fixing this.

shaders code

vertex shader code

void main()
{
   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
   float f1 = 1.0;
   vec4 eyePosition = gl_ModelViewMatrix * gl_Vertex;
   vec4 eyeLightPos = gl_LightSource[0].position;
   vec3 N = -normalize(gl_NormalMatrix *gl_Normal);
   vec3 L = -normalize(eyeLightPos.xyz - eyePosition.xyz );
   vec3 E = -normalize(eyePosition.xyz);
   vec3 H = normalize(L + E);
   float kd = max(dot(L, N), 0.0);
   float ks = pow(max(dot(N,H),0.0), gl_FrontMaterial.shininess);
    if(dot(L,N)<0.0) f1=0.0;
   vec4 ambient = gl_FrontLightProduct[0].ambient;
   vec4 diffuse = 2.0*kd * gl_FrontLightProduct[0].diffuse;
   vec4 specular = 2.0*f1 * ks * gl_FrontLightProduct[0].specular;
    gl_FrontColor = 2.0*(ambient + diffuse + specular);
}

片段着色器代码

fragment shader code

void main(void)
{
    gl_FragColor =  gl_Color;
}

和InitializeGL（）

And InitializeGL()

void DisplayControlBase::initializeGL()
{
    InitializeGLSettings();
    setFocus();
    setFocusPolicy(Qt::WheelFocus);
    GLchar vShaderFile[] = "myVertexShader.glsl";
    GLchar fShaderFile[] = "myFragmentShader.glsl";

    GLchar *vSource, *fSource;
    vSource = readShaderSource(vShaderFile);
    fSource = readShaderSource(fShaderFile);

    initializeOpenGLFunctions();

    GLuint myProgObj;

    myProgObj = glCreateProgram();
    GLuint vShader, fShader;
    vShader = glCreateShader(GL_VERTEX_SHADER);
    fShader = glCreateShader(GL_FRAGMENT_SHADER);
    glAttachShader(myProgObj, vShader);
    glAttachShader(myProgObj, fShader);
    glShaderSource(vShader, 1, (const GLchar**) &vSource, NULL);
    glShaderSource(fShader, 1, (const GLchar**) &fSource, NULL);

    glCompileShader(vShader);
    glCompileShader(fShader);
    GLint status;
    glGetShaderiv(fShader, GL_COMPILE_STATUS, &status);

    CheckError(status, fShader);
    glGetShaderiv(vShader, GL_COMPILE_STATUS, &status);
    CheckError(status, vShader);
    glLinkProgram(myProgObj);
    glUseProgram(myProgObj);
    glGetProgramiv(myProgObj, GL_LINK_STATUS, &status);
    CheckError(status, myProgObj);

}

void DisplayControlBase::CheckError(GLint CompileStatus, GLuint Shader)
{
    if (!CompileStatus)
    {
        int iLength, iChars;
         glGetShaderiv(Shader, GL_INFO_LOG_LENGTH, &iLength);

        char* pInfoLog = new char[iLength];
        glGetShaderInfoLog(Shader, iLength, &iChars, pInfoLog);

        delete [] pInfoLog;
    }
}

char* DisplayControlBase::readShaderSource(const char *shaderFile)
{
    FILE *fp = fopen(shaderFile, "r");
    char* buffer;
    long size;
    if( fp == NULL) return(NULL );
    fseek(fp, 0L, SEEK_END);
    size = ftell(fp);
    fseek(fp, 0L, SEEK_SET);
    buffer = (char*)malloc((size + 1)* sizeof(char));
    fread(buffer, 1, size, fp);
    buffer[size] = ' ';
    fclose(fp);
    return buffer;
}

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