我试图制作一个三角形,但是当我编译并运行程序时,它不会渲染。
代码如下:
#include <iostream>
#include <gl/GL.h>
#include <SDL.h>
#include <SDL_opengl.h>
const int windowWidth = 1280, windowHeight = 720;
int main(int argc, char* argv[])
{
// Create window //
SDL_Window* window = SDL_CreateWindow("OpenGL Test", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, windowWidth, windowHeight, SDL_WINDOW_OPENGL);
if (window == NULL)
{
return EXIT_FAILURE;
}
SDL_Event windowEvent;
// OpenGL context //
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
// Main loop //
while (true)
{
if (SDL_PollEvent(&windowEvent))
{
if (windowEvent.type == SDL_QUIT)
{
break;
}
}
// Draw //
glClearColor(0.f, 0.f, 0.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glColor3f(1.f, 0.f, 0.f);
glVertex2f(0, 0.5);
glColor3f(0.f, 1.f, 0.f);
glVertex2f(-0.5, -0.5);
glColor3f(0.f, 0.f, 1.f);
glVertex2f(0.5, -0.5);
glEnd();
glFlush();
SDL_GL_SwapWindow(window);
}
SDL_DestroyWindow(window);
SDL_Quit();
return EXIT_SUCCESS;
}
答案 0 :(得分:0)
多个问题:
SDL_GL_SetAttribute()
前致电SDL_CreateWindow()
。SDL_GL_CreateContext()
创建GL上下文。SDL_GL_CONTEXT_PROFILE_CORE
,则需要完全重新编写其余的GL代码,以不使用所有已删除的功能,例如glBegin()
/ glVertex()
/ { {1}} / glColor()
。一起:
glEnd()