Ok, I found few bugs in my previous code...
But Redraw() still do not do anything....
The only way to have the OpenGl window displayed is to call myself the redraw
of the Child Window
test->GL1->redraw();
Loic,
class WIN_GL : public Fl_Gl_Window {
public:
WIN_GL(int x,int y,int w,int h,const char *l=0) : Fl_Gl_Window(x,y,w,h,l){}
void Perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble
zFar) {
GLdouble xmin, xmax, ymin, ymax;
ymax = zNear * tan(fovy * 3.141516 / 360.0);
ymin = -ymax;
xmin = ymin * aspect;
xmax = ymax * aspect;
glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
}
void draw(){
std::cout << "GL DRAW\n";
if ( !valid() ) {
valid(1);
// Viewport
glViewport(0, 0, w(), h());
// Projection
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
GLfloat ratio = w() / (float)h();
Perspective(30.0f, 1.0f*ratio, 1.0f, 30.0f);
glTranslatef(0.0, 0.0, -10.0);
// Model view
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
glClearColor(.9,.9,.9, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Setup model matrix
glLoadIdentity();
static float spin = 0.0f;
spin+=0.5f;
glRotatef(spin, 0.5f, 1.0f, 0.0f); // show all sides of cube
// Draw cube with texture assigned to each face
glBegin(GL_QUADS);
// Front Face
glColor3f(1.0, 0.0, 0.0); // red
glVertex3f(-1.0, 1.0, 1.0); // Top Left Of The Texture and Quad
glVertex3f( 1.0, 1.0, 1.0); // Top Right Of The Texture and Quad
glVertex3f( 1.0, -1.0, 1.0); // Bottom Right Of The Texture and
Quad
glVertex3f(-1.0, -1.0, 1.0); // Bottom Left Of The Texture and
Quad
// Back Face
glColor3f(0.0, 1.0, 1.0); // cyn
glVertex3f( 1.0, 1.0, -1.0); // Top Left Of The Texture and Quad
glVertex3f(-1.0, 1.0, -1.0); // Top Right Of The Texture and Quad
glVertex3f(-1.0, -1.0, -1.0); // Bottom Right Of The Texture and
Quad
glVertex3f( 1.0, -1.0, -1.0); // Bottom Left Of The Texture and
Quad
// Top Face
glColor3f(0.0, 1.0, 0.0); // grn
glVertex3f(-1.0, 1.0, -1.0); // Top Left Of The Texture and Quad
glVertex3f( 1.0, 1.0, -1.0); // Top Right Of The Texture and Quad
glVertex3f( 1.0, 1.0, 1.0); // Bottom Right Of The Texture and
Quad
glVertex3f(-1.0, 1.0, 1.0); // Bottom Left Of The Texture and
Quad
// Bottom Face
glColor3f(1.0, 0.0, 1.0); // mag
glVertex3f( 1.0, -1.0, -1.0); // Top Left Of The Texture and Quad
glVertex3f(-1.0, -1.0, -1.0); // Top Right Of The Texture and Quad
glVertex3f(-1.0, -1.0, 1.0); // Bottom Right Of The Texture and
Quad
glVertex3f( 1.0, -1.0, 1.0); // Bottom Left Of The Texture and
Quad
// Right face
glColor3f(0.0, 0.0, 1.0); // blu
glVertex3f( 1.0, 1.0, 1.0); // Top Left Of The Texture and Quad
glVertex3f( 1.0, 1.0, -1.0); // Top Right Of The Texture and Quad
glVertex3f( 1.0, -1.0, -1.0); // Bottom Right Of The Texture and
Quad
glVertex3f( 1.0, -1.0, 1.0); // Bottom Left Of The Texture and
Quad
// Left Face
glColor3f(1.0, 1.0, 0.0); // yel
glVertex3f(-1.0, 1.0, -1.0); // Top Left Of The Texture and Quad
glVertex3f(-1.0, 1.0, 1.0); // Top Right Of The Texture and Quad
glVertex3f(-1.0, -1.0, 1.0); // Bottom Right Of The Texture and
Quad
glVertex3f(-1.0, -1.0, -1.0); // Bottom Left Of The Texture and
Quad
glEnd();
Fl_Gl_Window::draw();
}
int handle(int e){
return Fl_Gl_Window::handle(e);
}
};
class WIN_MAIN : public Fl_Double_Window {
public:
WIN_GL* GL1;
WIN_GL* GL2;
WIN_MAIN(int x,int y,int w,int h,const char *l=0) : Fl_Double_Window(x,y,w,h,l)
{
this->begin();
GL1 = new WIN_GL(10,10,w/2, h-10);
GL1->end();
GL1->show();
GL1->draw();
GL1->resizable(this);
this->begin();
GL2 = new WIN_GL(w-w/2-10/2,10,w/2, h-10);
GL2->end();
GL2->show();
GL2->draw();
GL2->resizable(this);
this->end();
}
};
int main (int argc, char *argv[])
{
WIN_MAIN* test = new WIN_MAIN(0,0,800,600,"Displayer");
test->resizable(test);
test->show();
while(test->shown()){
Fl::check();
//test->damage(FL_DAMAGE_ALL);
//test->GL1->redraw();
test->redraw();
}
return 0;
}
> Hi created a small example code reproducing my problem...
>
> With my understanding, This code is suppose to create one windows called
> "Test Window" contianing 2 OpenGL Windows.
>
> At each draw of the openGl window, it prints out "GL Draw".
> But when running my code, I only see 2 "GL_Draw" print outs, comming from
> GL1->draw(); and GL2->draw();.
> In any case, nothing is drawn on the "Test Window".
>
> I likeli miss an important point here,
> I checked over the documentation but didn't find obvious things...
> So you help is really welcome here...
>
> Loic,
>
>
>
> class WIN_GL : public Fl_Gl_Window {
> public:
>
> WIN_GL(int x,int y,int w,int h,const char *l=0) :
> Fl_Gl_Window(x,y,w,h,l){}
>
> void Perspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble
> zFar) {
> GLdouble xmin, xmax, ymin, ymax;
> ymax = zNear * tan(fovy * 3.141516 / 360.0);
> ymin = -ymax;
> xmin = ymin * aspect;
> xmax = ymax * aspect;
> glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
> }
>
> void draw(){
> std::cout << "GL DRAW\n";
> if ( !valid() ) {
> valid(1);
>
> // Viewport
> glViewport(0, 0, w(), h());
> // Projection
> glMatrixMode(GL_PROJECTION);
> glLoadIdentity();
> GLfloat ratio = w() / h();
> Perspective(30.0f, 1.0f*ratio, 1.0f, 30.0f);
> glTranslatef(0.0, 0.0, -8.0);
> // Model view
> glMatrixMode(GL_MODELVIEW);
> glLoadIdentity();
> }
>
>
> glClearColor(.9,.9,.9, 1.0);
> glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
> // Setup model matrix
> glLoadIdentity();
> static float spin = 0.0f;
> spin+=0.5f;
> glRotatef(spin, 0.5f, 1.0f, 0.0f); // show all sides of cube
> // Draw cube with texture assigned to each face
> glBegin(GL_QUADS);
> // Front Face
> glColor3f(1.0, 0.0, 0.0); // red
> glVertex3f(-1.0, 1.0, 1.0); // Top Left Of The Texture and
> Quad
> glVertex3f( 1.0, 1.0, 1.0); // Top Right Of The Texture and
> Quad
> glVertex3f( 1.0, -1.0, 1.0); // Bottom Right Of The Texture
> and Quad
> glVertex3f(-1.0, -1.0, 1.0); // Bottom Left Of The Texture and
> Quad
> // Back Face
> glColor3f(0.0, 1.0, 1.0); // cyn
> glVertex3f( 1.0, 1.0, -1.0); // Top Left Of The Texture and
> Quad
> glVertex3f(-1.0, 1.0, -1.0); // Top Right Of The Texture and
> Quad
> glVertex3f(-1.0, -1.0, -1.0); // Bottom Right Of The Texture
> and Quad
> glVertex3f( 1.0, -1.0, -1.0); // Bottom Left Of The Texture and
> Quad
> // Top Face
> glColor3f(0.0, 1.0, 0.0); // grn
> glVertex3f(-1.0, 1.0, -1.0); // Top Left Of The Texture and
> Quad
> glVertex3f( 1.0, 1.0, -1.0); // Top Right Of The Texture and
> Quad
> glVertex3f( 1.0, 1.0, 1.0); // Bottom Right Of The Texture
> and Quad
> glVertex3f(-1.0, 1.0, 1.0); // Bottom Left Of The Texture and
> Quad
> // Bottom Face
> glColor3f(1.0, 0.0, 1.0); // mag
> glVertex3f( 1.0, -1.0, -1.0); // Top Left Of The Texture and
> Quad
> glVertex3f(-1.0, -1.0, -1.0); // Top Right Of The Texture and
> Quad
> glVertex3f(-1.0, -1.0, 1.0); // Bottom Right Of The Texture
> and Quad
> glVertex3f( 1.0, -1.0, 1.0); // Bottom Left Of The Texture and
> Quad
> // Right face
> glColor3f(0.0, 0.0, 1.0); // blu
> glVertex3f( 1.0, 1.0, 1.0); // Top Left Of The Texture and
> Quad
> glVertex3f( 1.0, 1.0, -1.0); // Top Right Of The Texture and
> Quad
> glVertex3f( 1.0, -1.0, -1.0); // Bottom Right Of The Texture
> and Quad
> glVertex3f( 1.0, -1.0, 1.0); // Bottom Left Of The Texture and
> Quad
> // Left Face
> glColor3f(1.0, 1.0, 0.0); // yel
> glVertex3f(-1.0, 1.0, -1.0); // Top Left Of The Texture and
> Quad
> glVertex3f(-1.0, 1.0, 1.0); // Top Right Of The Texture and
> Quad
> glVertex3f(-1.0, -1.0, 1.0); // Bottom Right Of The Texture
> and Quad
> glVertex3f(-1.0, -1.0, -1.0); // Bottom Left Of The Texture and
> Quad
> glEnd();
> }
>
> int handle(int e){
> return Fl_Gl_Window::handle(e);
> }
> };
>
>
> class WIN_MAIN : public Fl_Double_Window {
> public:
> WIN_GL* GL1;
> WIN_GL* GL2;
>
> WIN_MAIN(int x,int y,int w,int h,const char *l=0) :
> Fl_Double_Window(x,y,w,h,l)
> {
> this->begin();
> GL1 = new WIN_GL(10,10,(w-30)/2, (y-20));
> GL1->end();
> GL1->show();
> GL1->draw();
> GL1->resizable(this);
>
> this->begin();
> GL2 = new WIN_GL(20+(w-30)/2,10,(w-30)/2, (y-20));
> GL2->end();
> GL2->show();
> GL2->draw();
> GL2->resizable(this);
>
> this->end();
> }
> };
>
> int main (int argc, char *argv[])
> {
> WIN_MAIN* test = new WIN_MAIN(0,0,800,600,"Test Window");
> test->resizable(test);
> test->show();
>
> while(test->shown()){
> Fl::check();
> //test->damage(FL_DAMAGE_ALL);
> test->redraw();
> }
> return 0;
> }
>
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