#include
#include
#include
void framebuffer_size_callback(glfwwindow* window, int width, int height);
void processinput(glfwwindow *window);
const
unsigned
int width = 800;
const
unsigned
int height = 600;
const
char *vertexshadersource = "#version 330 core\n"
"layout (location=0) in vec3 apos;\n"
"void main()\n"
"\n";
const
char *fragmentshadersource = "#version 330 core\n"
"out vec4 fragcolor;\n"
"void main()\n"
"\n"
;int main()
glfwmakecontextcurrent(window);
glfwsetframebuffersizecallback(window, framebuffer_size_callback);
if (!gladloadglloader((gladloadproc)glfwgetprocaddress))
//vertex shader
int vertexshader = glcreateshader(gl_vertex_shader);
glshadersource(vertexshader, 1, &vertexshadersource, null);
glcompileshader(vertexshader);
int success;
char infolog[512];
glgetshaderiv(vertexshader, gl_compile_status, &success);
if (!success)
// fragment shader
int fragmentshader = glcreateshader(gl_fragment_shader);
glshadersource(fragmentshader, 1, &fragmentshadersource, null);
glcompileshader(fragmentshader);
glgetshaderiv(fragmentshader, gl_compile_status, &success);
if (!success)
//連線shader
int shaderprogram = glcreateprogram();
glattachshader(shaderprogram, vertexshader);
glattachshader(shaderprogram, fragmentshader);
gllinkprogram(shaderprogram);
glgetprogramiv(shaderprogram, gl_link_status, &success);
if (!success)
gldeleteshader(vertexshader);
gldeleteshader(fragmentshader);
//頂點資料
float vertices = ;
//頂點索引
unsigned
int indices = ;
unsigned
int vbo, vao, ebo;
//建立vao物件
glgenvertexarrays(1, &vao);
//建立vbo物件
glgenbuffers(1,&vbo);
//建立ebo物件
glgenbuffers(1,&ebo);
//使用vao物件
glbindvertexarray(vao);
//使用vbo物件
glbindbuffer(gl_array_buffer, vbo);
//拷貝頂點資料到vbo
glbufferdata(gl_array_buffer, sizeof(vertices), vertices, gl_static_draw);
//使用ebo物件
glbindbuffer(gl_element_array_buffer,ebo);
//拷貝索引資料到ebo
glbufferdata(gl_element_array_buffer, sizeof(indices), indices, gl_static_draw);
//讓opengl知道怎麼結束頂點的屬性
glvertexattribpointer(0, 3, gl_float, gl_false, 3 * sizeof(float), (void*)0);
//實第乙個屬性（位置屬性）變為可用狀態
glenablevertexattribarray(0);
//解綁vbo物件
glbindbuffer(gl_array_buffer, 0);
//不用解綁ebo物件，因為vao物件還在啟用狀態
//glbindbuffer(gl_element_array_buffer, 0);
//解綁vao物件，在while迴圈中重新啟用
glbindvertexarray(0);
//畫成線框圖
glpolygonmode(gl_front_and_back, gl_line);
while (!glfwwindowshouldclose(window))
gldeletevertexarrays(1, &vao);
gldeletebuffers(1, &vbo);
gldeletebuffers(1, &ebo);
glfwterminate();
return0;}
//處理鍵盤的輸入
void processinput(glfwwindow *window)
}//當視窗大小改變的時候呼叫的回掉函式
void framebuffer_size_callback(glfwwindow *window, int width, int height)
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