hello when I try to debug this Exception is throwing in glgenbuffers im using opengl and sdl there are my codes
it consists of two class m and sprite class m is like that s is var of sprite class void run() { init(); s.init(-1.0f,-1.0f,1.0f,1.0f); loop(); }
void init() { SDL_Init(SDL_INIT_EVERYTHING); glewExperimental = GL_TRUE; SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); window = SDL_CreateWindow("mine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1024, 768, SDL_WINDOW_OPENGL); if (window == nullptr) {
fatalerror("cant create (open) window");
}
SDL_GLContext context = SDL_GL_CreateContext(window);
if (context == nullptr) {
fatalerror("context cant be created ");
}
GLenum cerror = glewInit();
if (cerror != GLEW_OK)
{
fatalerror("cant init glew:(");
}
std::cout << "ok";
glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
}
void looploop() { while (state != gamestate::exit) {
input();
draw();
}
} void M::input() { while (SDL_PollEvent(&events)) {
switch (events.type)
{
case SDL_QUIT:
state = gamestate::exit;
SDL_DestroyWindow(window);
break;
case SDL_MOUSEMOTION:
std::cout << events.motion.x << ',' << events.motion.y << "\n";
break;
}
}
}
void draw() { glClearDepth(1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnableClientState(GL_COLOR_ARRAY); s.draw();
SDL_GL_SwapWindow(window);
}
class sprite
void init(float x, float y, float w, float h) { _x = x; _y = y; _w = w; _h = h;
if (vboid == 0) {
glGenBuffers(1, &vboid);
}
float vertexdata[12];
//first triangle
vertexdata[0] = x + w;
vertexdata[1] = y + w;
vertexdata[2] = x;
vertexdata[3] = y + h;
vertexdata[4] = x;
vertexdata[5] = y;
//second triangle
vertexdata[6] = x;
vertexdata[7] = y ;
vertexdata[8] = x+h;
vertexdata[9] = y;
vertexdata[10] = x+w;
vertexdata[11] = y+h;
glBindBuffer(GL_ARRAY_BUFFER,vboid);
glBufferData(GL_ARRAY_BUFFER,sizeof(vertexdata),vertexdata,GL_STATIC_DRAW)
;
}
void draw() {
glBindBuffer(GL_ARRAY_BUFFER,vboid);
glEnableVertexAttribArray(0);
glVertexAttribLPointer(0,2,GL_FLOAT,GL_FALSE,0);
glDrawArrays(GL_TRIANGLES,0,6);
glDisableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, vboid);
}