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我正在寫一個使用wxWidgets庫的openGL程序，我主要工作，但由於錯誤的字符被插入（我認爲），我得到着色器編譯錯誤，只有我找不到在哪裏字符是或導致它們的原因。錯誤是：OpenGL的着色器錯誤
error 0(1) : error C0000: syntax error, unexpected $undefined at token "<undefined>"
我不知道爲什麼，因爲我看不到任何錯誤時，我cout字符串。這裏是正在被送入glshadersource（）：
#version 430 core
layout(location =0) in vec3 vpos;
out vec3 fragmentColor;
uniform mat4 MVP;
void main(void)
{
gl_Position = MVP * vec4(vpos,1);
};
下面是我用的着色器編譯器功能：
void GL_set::compileAndLink()
{
GLint Result = GL_FALSE;
int InfoLogLength = 0;
// Create vertex shader, attach source code, compile
vertexShader = glCreateShader(GL_VERTEX_SHADER);
const GLchar* adapter[1];
adapter[0] = readShaderCode("Vshader.glsl").c_str();
glShaderSource(vertexShader, 1, adapter, NULL);
glCompileShader(vertexShader);
// Check vertex shader for errors
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &Result);
glGetShaderiv(vertexShader, GL_INFO_LOG_LENGTH, &InfoLogLength);
if (InfoLogLength > 0)
{
char vertexError[1000];
glGetShaderInfoLog(vertexShader, InfoLogLength, NULL, &vertexError[0]);
std::cout << &vertexError[0];
}
// Create fragment shader, attach source code, compile
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
adapter[0] = readShaderCode("Fshader.glsl").c_str();
glShaderSource(fragmentShader, 1, adapter, NULL);
glCompileShader(fragmentShader);
// Check fragment shader for errors
glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &Result);
glGetShaderiv(fragmentShader, GL_INFO_LOG_LENGTH, &InfoLogLength);
if (InfoLogLength > 0)
{
char fragmentError[1000];
glGetShaderInfoLog(fragmentShader, InfoLogLength, NULL,
&fragmentError[0]);
std::cout << &fragmentError[0];
}
// Create program and attach shaders
program = glCreateProgram();
glAttachShader(program, vertexShader);
glAttachShader(program, fragmentShader);
glLinkProgram(program);
//check program for errors
glGetProgramiv(program, GL_LINK_STATUS, &Result);
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &InfoLogLength);
if (InfoLogLength > 0)
{
char programError[1000];
glGetProgramInfoLog(program, InfoLogLength, NULL, &programError[0]);
std::cout << &programError[0];
}
}
std::string GL_set::readShaderCode(const char* fileName)
{
printf("passing %s to readShaderCode() \n", fileName);
std::ifstream input(fileName);
if(!input.good())
{
std::cout << "failed to load file " << fileName;
exit(1);
}
std::string code = std::string(
std::istreambuf_iterator<char>(input),
std::istreambuf_iterator<char>()
);
// output the code to cout for error checking
std::cout << "Read shader input: \n" << code << "\n" << std::endl;
return code;
}
以下是完整的控制檯輸出：
normal display attribs are supported
calling gl_init()
gl_set construtor called
setting buffers
passing Vshader.glsl to readShaderCode()
Read shader input:
#version 430 core
layout(location =0) in vec3 vpos;
out vec3 fragmentColor;
uniform mat4 MVP;
void main(void)
{
//output position of the vertex in clip space MVP*position
gl_Position = MVP * vec4(vpos,1);
};
0(1) : error C0000: syntax error, unexpected $undefined at token "<undefined>"
passing Fshader.glsl to readShaderCode()
Read shader input:
#version 430 core
in vec3 fragmentColor;
out vec3 color;
void main()
{
color = fragmentColor;
};
0(1) : error C0000: syntax error, unexpected $undefined at token "<undefined>"
Vertex info
-----------
0(1) : error C0000: syntax error, unexpected $undefined at token "
<undefined>"
(0) : error C2003: incompatible options for link
Fragment info
-------------
0(1) : error C0000: syntax error, unexpected $undefined at token "<undefined>"
(0) : error C2003: incompatible options for link
Loading OBJ file mod.obj...
這裏其他同學：
#include "GL_set.h"
GL_set::GL_set()
{
std::cout << "gl_set construtor called" << std::endl;
GL_set::setBuffers();
}
void GL_set::setBuffers()
{
std::cout << "setting buffers" << std::endl;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
//create shaders and attach them to the program object
GL_set::compileAndLink();
loadOBJ("mod.obj", vdata); // use OBJ loader
glGenBuffers(1, &vertexbuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
glBufferData(GL_ARRAY_BUFFER, vdata.size()*sizeof(glm::vec3), &vdata[0], GL_STATIC_DRAW);
//vertex buffer
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
glVertexAttribPointer(
0, //index
3, //size
GL_FLOAT, //type
GL_FALSE, //normalized?
0, //stride
0 //array buffer offset
);
}
void GL_set::draw()
{
glBindVertexArray(vao);
GLuint matrixID = glGetUniformLocation(program, "MVP");
////////////////////////////matrix operations/////////////////////////////////////////
//projection matrix 45 degree FoV, 4:3 ratio, display range 0.1 - 100
glm::mat4 projection = glm::perspective(45.0f, 4.0f/3.0f, 0.1f, 100.0f);
//camera matrix
glm::mat4 view = glm::lookAt(
glm::vec3(8, 8, 8), //camera posiiton
glm::vec3(0, 1, 0), //camera looks at this point
glm::vec3(0, 1, 0) //head up position
);
//model matrix identity matrix
glm::mat4 model = glm::mat4(1.0f);
//rotate
model = glm::rotate(model, 1.0f, glm::vec3(1,1,1));
//model-view-projection
glm::mat4 MVP = projection * view * model;
/////////////////////////////////////////////////////////
glUniformMatrix4fv(matrixID, 1, GL_FALSE, &MVP[0][0]);
glDrawArrays(GL_TRIANGLES, 0, vdata.size()*sizeof(glm::vec3));
}
我認爲我的wxWidgets相關代碼沒問題，窗口界面加載了一個空白的白屏，大概是由着色器錯誤引起的。如果需要，我可以發佈更多，謝謝。
期望片段着色器如何獲得'fragmentColor'from？在頂點着色器中取消註釋「輸出」命令，爲其設置一些值並重試。 – Ripi2