【发布时间】：2017-11-13 14:56:35
【问题描述】：
所以我的大学讲师给了我们这个代码，但它不起作用..它从来没有，到目前为止没有人能够让它工作..我们是愚蠢的还是我们的讲师给了我们破碎的材料？我真的无法弄清楚这一点并需要帮助，我设法部分解决了许多错误，但之后问题变得越来越难以解决，尽管这是“100% 工作”的代码......旁注：据我所知，所有目录的格式都正确，并且其他依赖项都已正确设置。
//First Shader Handling Program
#include "stdafx.h"
#include "gl_core_4_3.hpp"
#include <GLFW/glfw3.h>
int _tmain(int argc, _TCHAR* argv[])
{
//Select the 4.3 core profile
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
//Start the OpenGL context and open a window using the //GLFW helper library
if (!glfwInit()) {
fprintf(stderr, "ERROR: could not start GLFW3\n");
glfwTerminate();
return 1;
}
GLFWwindow* window = glfwCreateWindow(640, 480, "First GLSL Triangle", NULL, NULL);
if (!window) {
fprintf(stderr, "ERROR: could not open window with GLFW3\n");
glfwTerminate();
return 1;
}
glfwMakeContextCurrent(window);
//Load the OpenGL functions for C++ gl::exts::LoadTest didLoad = gl::sys::LoadFunctions(); if (!didLoad) {
//Load failed
fprintf(stderr, "ERROR: GLLoadGen failed to load functions\n");
glfwTerminate();
return 1;
}
printf("Number of functions that failed to load : %i.\n", didLoad.GetNumMissing());
//Tell OpenGL to only draw a pixel if its shape is closer to //the viewer
//i.e. Enable depth testing with smaller depth value //interpreted as being closer gl::Enable(gl::DEPTH_TEST); gl::DepthFunc(gl::LESS);
//Set up the vertices for a triangle
float points[] = {
0.0f, 0.5f, 0.0f,
0.5f, -0.5f, 0.0f,
-0.5f, -0.5f, 0.0f
};
//Create a vertex buffer object to hold this data GLuint vbo=0;
gl::GenBuffers(1, &vbo);
gl::BindBuffer(gl::ARRAY_BUFFER, vbo);
gl::BufferData(gl::ARRAY_BUFFER, 9 * sizeof(float), points,
gl::STATIC_DRAW);
//Create a vertex array object
GLuint vao = 0;
gl::GenVertexArrays(1, &vao);
gl::BindVertexArray(vao);
gl::EnableVertexAttribArray(0);
gl::BindBuffer(gl::ARRAY_BUFFER, vbo);
gl::VertexAttribPointer(0, 3, gl::FLOAT, FALSE, 0, NULL);
//The shader code strings which later we will put in //separate files
//The Vertex Shader
const char* vertex_shader =
"#version 400\n"
"in vec3 vp;"
"void main() {"
" gl_Position = vec4(vp, 1.0);"
"}";
//The Fragment Shader
const char* fragment_shader =
"#version 400\n"
"out vec4 frag_colour;"
"void main() {"
" frag_colour = vec4(1.0, 0.5, 0.0, 1.0);"
"}";
//Load the strings into shader objects and compile GLuint vs = gl::CreateShader(gl::VERTEX_SHADER); gl::ShaderSource(vs, 1, &vertex_shader, NULL); gl::CompileShader(vs);
GLuint fs = gl::CreateShader(gl::FRAGMENT_SHADER); gl::ShaderSource(fs, 1, &fragment_shader, NULL); gl::CompileShader(fs);
//Compiled shaders must be compiled into a single executable //GPU shader program
//Create empty program and attach shaders GLuint shader_program = gl::CreateProgram(); gl::AttachShader(shader_program, fs); gl::AttachShader(shader_program, vs); gl::LinkProgram(shader_program);
//Now draw
while (!glfwWindowShouldClose(window)) {
//Clear the drawing surface
gl::Clear(gl::COLOR_BUFFER_BIT | gl::DEPTH_BUFFER_BIT);
gl::UseProgram(shader_program);
gl::BindVertexArray(vao);
//Draw point 0 to 3 from the currently bound VAO with
//current in-use shader
gl::DrawArrays(gl::TRIANGLES, 0, 3);
//update GLFW event handling
glfwPollEvents();
//Put the stuff we have been drawing onto the display glfwSwapBuffers(window);
}
//Close GLFW and end
glfwTerminate();
return 0;
}
【问题讨论】：
-
最好发布您看到的错误。您可以将它们编辑到您的问题中。
-
很多地方重要的代码都被注释掉了。 （我怀疑这发生在删除换行符的复制和粘贴操作期间，或者通过拙劣的换行符转换。）
-
它实际上看起来像是某些类型的 EOL 转换失败的结果。