c++ - 在 Linux 上使用 Qt 5.4 的某些 OpenGL 函数...

Question

下面的代码块适用于 Windows(在 VC++ 2013 中)，因为我已经包含了 GL/glew.h，但在 Linux 上使用 QT Creator 时，它取消了包含的定义，因此下面粗体显示的函数不可用。

如何才能像在 Windows 下一样在 Linux 下使用 OpenGL 函数 glGetUniformBlockIndex()、glUniformBlockBinding() 和 glBindBufferBase() ？

感谢您的宝贵时间。

void QTOpenGLWindow::loadShaderUniforms() {

 glUseProgram(MainOpenGLShaderProgramID);

 MatricesUniformBlockID = glGetUniformBlockIndex(MainOpenGLShaderProgramID, "Matrices");
 glUniformBlockBinding(MainOpenGLShaderProgramID, MatricesUniformBlockID, 1);
 glGenBuffers(1, &MatricesUniformBufferID);
 glBindBuffer(GL_UNIFORM_BUFFER, MatricesUniformBufferID);
 glBindBufferBase(GL_UNIFORM_BUFFER, 1, MatricesUniformBufferID);
 GLsizeiptr TotalBufferSize = sizeof(glm::mat4) + sizeof(glm::mat4);
 TotalBufferSize += sizeof(glm::mat3);

 glBufferData(GL_UNIFORM_BUFFER, TotalBufferSize, NULL, GL_DYNAMIC_DRAW);
 glBindBuffer(GL_UNIFORM_BUFFER, NULL);

 LightsUniformBlockID = glGetUniformBlockIndex(MainOpenGLShaderProgramID, "Lights");
 glUniformBlockBinding(MainOpenGLShaderProgramID, LightsUniformBlockID, 2);
 glGenBuffers(1, &LightsUniformBufferID);
 glBindBuffer(GL_UNIFORM_BUFFER, LightsUniformBufferID);
 glBindBufferBase(GL_UNIFORM_BUFFER, 2, LightsUniformBufferID);

 GLfloat LightDirection[3] = { -4.0f, -3.0f, -3.0f };

 glBufferData(GL_UNIFORM_BUFFER, sizeof(LightDirection), &LightDirection, GL_DYNAMIC_DRAW);
 glBindBuffer(GL_UNIFORM_BUFFER, NULL);

 MaterialsUniformBlockID = glGetUniformBlockIndex(MainOpenGLShaderProgramID, "Materials");
 glUniformBlockBinding(MainOpenGLShaderProgramID, MaterialsUniformBlockID, 3);
 glGenBuffers(1, &MaterialsUniformBufferID);
 glBindBuffer(GL_UNIFORM_BUFFER, MaterialsUniformBufferID);
 glBindBufferBase(GL_UNIFORM_BUFFER, 3, MaterialsUniformBufferID);

 GLfloat Material[18];

 //Diffuse
 Material[0] = 0.5f;
 Material[1] = 0.0f;
 Material[2] = 0.0f;
 Material[3] = 1.0f;

 //Ambient
 Material[4] = 0.2f;
 Material[5] = 0.2f;
 Material[6] = 0.2f;
 Material[7] = 1.0f;

 //Specular
 Material[8] = 1.0f;
 Material[9] = 1.0f;
 Material[10] = 1.0f;
 Material[11] = 1.0f;

 //Emissive
 Material[12] = 0.0f;
 Material[13] = 0.0f;
 Material[14] = 0.0f;
 Material[15] = 1.0f;

 //Shininess
 Material[16] = 5.0f;

 //Texture Count
 Material[17] = 0.0f;

 glBufferData(GL_UNIFORM_BUFFER, sizeof(Material), &Material, GL_DYNAMIC_DRAW);
 glBindBuffer(GL_UNIFORM_BUFFER, NULL);

}

Answer 1

你可以尝试一下:

#if defined(Q_OS_WIN32)
#include <GL/glew.h>
#include <GL/wglew.h>
#elif defined(Q_OS_MAC)
#include <OpenGL/gl.h>
#include <OpenGL/glext.h>
#else
#include <GL/gl.h>
#include <GL/glext.h>
#endif

这就是我们在我现在从事的项目中所做的事情。我不是那个设置它的人，但我认为值得一试。如果您有兴趣查看原始代码，请访问 Github .