c++ - 作为字符串的 OpenGL 统一名称指针

Question

这个问题已经有答案了:

When does OpenGL get finished with pointers in functions? (1 个回答)

已关闭 3 年前。

Set_Up_Shader(unsigned int sShader, string Uni_s, glm::vec3 V3){
    int isu = glGetUniformLocation(sShader, &Uni_s[0]);
    glUniform3fv(isu, 1, glm::value_ptr(V3));
}

我的问题是:显然 glGetUniformLocation 参数 2 应该是 const char*。 OpenGL 会延迟/需要 const 对象吗？将 OpenGL 引用发送到很快就会被销毁的字符串对象是否危险？

Answer 1

Is it dangerous to sent OpenGL reference to string object that soon will be destroyed?

没有。

参见OpenGL 4.6 API Core Profile Specification - 2.1 Execution Model :

Data binding occurs on call. This means that data passed to a GL command are interpreted when that command is received. Even if the command requires a pointer to data, those data are interpreted when the call is made, and any subsequent changes to the data have no effect on the GL