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// $Id: demo.cpp,v 1.1 1999/08/19 00:55:40 jtg Exp $
// Simple BeOS GLView demo
// Written by Brian Paul
// This file is in the public domain.
#include <stdio.h>
#include <Application.h>
#include <Window.h>
#include <GLView.h>
class MyWindow : public BWindow
{
public:
MyWindow(BRect frame);
virtual bool QuitRequested();
};
MyWindow::MyWindow(BRect frame)
: BWindow(frame, "demo", B_TITLED_WINDOW, B_NOT_ZOOMABLE)
{
// no-op
}
bool MyWindow::QuitRequested()
{
be_app->PostMessage(B_QUIT_REQUESTED);
return true;
}
class MyGL : public BGLView
{
public:
MyGL(BRect rect, char *name, ulong options);
// virtual void AttachedToWindow();
virtual void Draw(BRect updateRect);
virtual void Pulse();
virtual void FrameResized(float w, float h);
private:
float mAngle;
};
MyGL::MyGL(BRect rect, char *name, ulong options)
: BGLView(rect, name, B_FOLLOW_LEFT_RIGHT | B_FOLLOW_TOP_BOTTOM, 0, options)
{
mAngle = 0.0;
}
#if 0
void MyGL::AttachedToWindow()
{
BGLView::AttachedToWindow();
LockGL();
glClearColor(.7, .7, 0, 0);
UnlockGL();
}
#endif
void MyGL::FrameResized(float w, float h)
{
BGLView::FrameResized(w, h);
printf("FrameResized\n");
LockGL();
BGLView::FrameResized(w,h);
glViewport(0, 0, (int) (w + 1), (int) (h + 1));
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1, 1, -1, 1, 10, 30);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0, 0, -18);
UnlockGL();
}
void MyGL::Draw(BRect r)
{
printf("MyGL::Draw\n");
BGLView::Draw(r);
LockGL();
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(mAngle, 0, 0, 1);
glColor3f(0, 0, 1);
glBegin(GL_POLYGON);
glVertex2f(-1, -1);
glVertex2f( 1, -1);
glVertex2f( 1, 1);
glVertex2f(-1, 1);
glEnd();
SwapBuffers();
UnlockGL();
}
void MyGL::Pulse()
{
printf("pulse\n");
BGLView::Pulse();
mAngle += 1.0;
LockGL();
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(mAngle, 0, 0, 1);
glColor3f(0, 0, 1);
glBegin(GL_POLYGON);
glVertex2f(-1, -1);
glVertex2f( 1, -1);
glVertex2f( 1, 1);
glVertex2f(-1, 1);
glEnd();
SwapBuffers();
UnlockGL();
}
int main(int argc, char *argv[])
{
BApplication *app = new BApplication("application/demo");
// make top-level window
int x = 500, y = 500;
int w = 400, h = 400;
MyWindow *win = new MyWindow(BRect(x, y, x + w, y + h));
// win->Lock();
// win->Unlock();
win->Show();
// Make OpenGL view and put it in the window
MyGL *gl = new MyGL(BRect(5, 5, w-10, h-10), "GL", BGL_RGB | BGL_DOUBLE);
// MyGL *gl = new MyGL(BRect(5, 5, w-10, h-10), "GL", BGL_RGB );
win->AddChild(gl);
printf("calling app->Run\n");
app->Run();
delete app;
return 0;
}
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