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