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[英]Why wouldn't a search from glGetString(GL_EXTENSIONS) work correctly?
[英]std::cout << glGetString(GL_RENDER) << std::endl; Throws an Error but not GL_Renderer or GL_Verision and I can't figure out why?
第一次在這里問一個問題,所以如果它沒有正確布局或缺少某些東西,我會嘗試把其他所有東西都整理好。
我正在嘗試學習 OpenGl,因為我對開發自己的游戲很感興趣,而且我寧願創建自己的引擎,而不是已經存在的引擎。 我也在使用 GLEW,我知道它是 inits,因為代碼沒有 output 錯誤
我在谷歌上搜索錯誤代碼和 OpenGL 時花了一點時間,但沒有一個問題與我得到的真正匹配。 我也嘗試了 GLEW_Experimental = true 但這並沒有改變任何東西。
代碼:主要
#include "src/graphics/window.h"
int main()
{
using namespace FutureGamingEngine;
using namespace graphics;
Window window("Test", 1080, 720);
glClearColor(0, 255, 0, 1.0f); //Red, Green, Blue, No Idea
std::cout << glGetString(GL_VERSION) << std::endl;
std::cout << glGetString(GL_RENDERER) << std::endl;
std::cout << glGetString(GL_RENDER) << std::endl;
while (!window.closed())
{
window.clear();
glBegin(GL_QUADS);
glVertex2f(-0.5f, -0.5f);
glVertex2f(-0.5f, 0.5f);
glVertex2f(0.5f, 0.5f);
glVertex2f(0.5f,-0.5f);
glEnd();
window.update();
}
//system("PAUSE");
return 0;
}
Window:
#include "window.h"
namespace FutureGamingEngine
{
namespace graphics
{
void windowResize(GLFWwindow *window, int width, int height);
Window::Window(const char *title, int width, int height)
{
c_title = title;
c_height = height;
c_width = width;
if (!init())
{
glfwTerminate();
}
}
Window::~Window()
{
glfwTerminate();
}
bool Window::init()
{
glewExperimental = true;
if (!glfwInit())
{
std::cout << "Error Code: 0" << std::endl;
return false;
}
//Create a windowed mode and it's OpenGl Content
c_window = glfwCreateWindow(c_width, c_height, c_title, NULL, NULL);
//If we fail to make the window Terminate OpenGL
if (!c_window)
{
glfwTerminate();
return false;
}
//std::cout << "Open GL: " << glGetString(GL_VERSION) << std::endl;
glfwMakeContextCurrent(c_window);
glfwSetWindowSizeCallback(c_window, windowResize);
if (glewInit() != GLEW_OK)
{
std::cout << "Error Code: 1" << std::endl;
return false;
}
return true;
}
bool Window::closed() const
{
return glfwWindowShouldClose(c_window);
}
void Window::update()
{
//poll for and process events
glfwPollEvents();
glfwGetFramebufferSize(c_window, &c_width, &c_height);
//swap front and backbuffers
glfwSwapBuffers(c_window);
}
void Window::clear() const
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void windowResize(GLFWwindow *window, int width, int height)
{
glViewport(0, 0, width, height);
}
}
}
Header 用於 window:
#pragma once
#define GLEW_STATIC
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <iostream>
namespace FutureGamingEngine
{
namespace graphics
{
class Window
{
private:
const char *c_title;
int c_width, c_height;
GLFWwindow *c_window;
bool c_closed;
public:
Window(const char *a_name, int a_width, int a_height);
~Window();
bool closed() const;
void update();
void clear() const;
inline int getHeight() const { return c_height; };
inline int getWidth() const { return c_width; };
private:
bool init();
};
}
}
我期待它告訴我渲染版本。 我實際上得到的是在 std::cout << glGetString(GL_RENDER) << std::endl; 上產生的錯誤 :
FutureGamingEngine-Core.exe 中的 0x7C50F6E0 (ucrtbased.dll) 引發異常:0xC0000005:訪問沖突讀取位置 0x00000000。
( https://i.imgur.com/uKu3hxX.png )
並且不會像在我要求 Gl_render 之前那樣渲染三角形
GL_RENDERER 是有效的枚舉,GL_RENDER 不是。 請參閱OpenGL 文檔謝謝 Ripi2:我顯然看起來不夠努力:D
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