Greg Ercolano wrote:
> Maybe show us your FLTK2 translated sphere.cxx file.
I decided to take a shot at translating this example to FLTK2.
I'm not sure if it's right because I get the same error you do,
with or without the glutInit() call, and no matter where I put it in main().
With this code I'm trying to use FLTK2 to completely handle the
windows, and calling fltk::run().
I could probably make it work if I made it more like the fractal.cxx
program where the fltk widgets are in an FLTK window, and the glut stuff
in a separate window. Might try that next.
In this case I created foo.cxx in the FLTK2 test directory
and used a modified version of the glpuzzle build flags
(by commenting out .SILENT in the makeinclude and rebuilding it,
then changing all instances of "glpuzzle" -> "foo")
g++ -I.. -I../fltk/compat -O2 -Wall -Wunused -I/usr/include/freetype2
-Wno-non-virtual-dtor -c foo.cxx
g++ foo.o ../lib/libfltk2_glut.a -L../lib -lfltk2_gl -lfltk2 -lGLU -lGL -lX11
-lXi -lXinerama -lXft -lpthread -lm -lXext -lsupc++ -lglut -o foo
Here's my first shot at translating to FLTK2.
It builds with no errors, but dies with the glutInit() error
at runtime. (A window does briefly open).
---
#ifdef _WIN32
#include <windows.h>
#endif
#include <math.h>
#include <fltk/glut.h> // changed for fltk
#include <fltk/DoubleBufferWindow.h>
#include <fltk/GlWindow.h>
#include <fltk/run.h>
//
// Render a simple opengl shaded sphere with a single side light -- erco
11/28/08
// translated to fltk2 -- erco 03/14/11
//
// NOTE: Glut needed *only* for glutSolidSphere()
//
class MyGlWindow : public fltk::GlWindow {
public:
// RESHAPE THE VIEWPORT
void Reshape(GLfloat W, GLfloat H) {
// (REFERENCE: SGI light.c DEMO)
GLfloat ratio = W / H;
glViewport(0, 0, (GLsizei)W, (GLsizei)H);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.5*ratio, 1.5*ratio, -1.5, 1.5, -10.0, 10.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void draw() {
if (!valid()) {
valid(1);
Reshape(w(), h());
// (REFERENCE: SGI 'light.c' EXAMPLE)
GLfloat mat_ambient[] = { 1.0, 1.0, 1.0, 1.0 }; // RGBA
GLfloat mat_diffuse[] = { 1.0, 1.0, 1.0, 1.0 }; // RGBA
GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 }; // RGBA
GLfloat light_position[] = { 5.0, 5.0, 0.0, 0.0 }; // XYZ
glClearColor(0.0, 0.0, 0.4, 0.0); // bg color
glShadeModel(GL_SMOOTH);
//
glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialf(GL_FRONT, GL_SHININESS, 20.0);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
//
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glColor3f(0.5, 0.5, 0.5);
glutSolidSphere(0.5, 30, 30);
glPopMatrix();
}
// CTOR
MyGlWindow(int X,int Y,int W,int H,const char*L=0) :
fltk::GlWindow(X,Y,W,H,L) {
}
};
int main(int argc, char *argv[]) {
fltk::DoubleBufferWindow dwin(640, 480, "sphere");
dwin.begin();
MyGlWindow mygl(10, 10, dwin.w()-20, dwin.h()-20);
dwin.end();
dwin.resizable(&mygl);
dwin.show();
fprintf(stderr, "CALLING GLUT INIT\n");
glutInit(&argc,argv);
return(fltk::run());
}
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