// main render function called by glut
void OnRender() {
//Calculate fps
totalFrames++;
int current = glutGet(GLUT_ELAPSED_TIME);
float elapsedTime = float(current - startTime);
static float lastfpsTime = 0.0f;
if ((current - lastfpsTime) > 1000.0f)
{
fps = ((totalFrames * 1000.0f) / ((current - lastfpsTime)));
totalFrames = 0;
lastfpsTime = float(current);
}
startTime = current;
sprintf_s(buffer, "FPS: %3.2f", fps);
//Update PhysX
if (gScene)
{
stepPhysics(elapsedTime / 1000.0f);
}
// start render
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(0, 0, dist);
glRotatef(rX, 1, 0, 0);
glRotatef(rY, 0, 1, 0);
// shoot
if (shoot)
{
GLdouble matModelView[16], matProjection[16];
GLdouble camera_pos[3];
int viewport[4];
// get matrixs and viewport:
glGetDoublev(GL_MODELVIEW_MATRIX, matModelView);
glGetDoublev(GL_PROJECTION_MATRIX, matProjection);
glGetIntegerv(GL_VIEWPORT, viewport);
gluUnProject((viewport[2] - viewport[0]) / 2, (viewport[3] - viewport[1]) / 2,
0.0, matModelView, matProjection, viewport,
&camera_pos[0], &camera_pos[1], &camera_pos[2]);
//PxVec3 p(camera_pos[0], camera_pos[1], camera_pos[2]);
//AddBullet(p, -p.getNormalized() * 10.0f);
shoot = false;
//
//GLdouble mpos[3];
//gluUnProject(oldX, oldY, 0,
// matModelView,
// matProjection, viewport, &mpos[0], &mpos[1], &mpos[2]);
GLfloat winX, winY, winZ; //variables to hold screen x,y,z coordinates
GLdouble worldX, worldY, worldZ; //variables to hold world x,y,z coordinates
winX = (float)(viewport[2] - viewport[0]) / 2;
winY = (float)(viewport[3] - viewport[1]) / 2;
glReadPixels(winX, winY, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ);
//get the world coordinates from the screen coordinates
gluUnProject(winX, winY, 0.0, matModelView, matProjection
, viewport, &worldX, &worldY, &worldZ);
GLdouble fx, fy, fz;
gluUnProject(winX, winY, 1.0, matModelView, matProjection
, viewport, &fx, &fy, &fz);
PxVec3 pp(worldX, worldY, worldZ);
PxVec3 vv(fx - worldX, fy - worldY, fz - worldZ);
AddBullet(pp, vv.getNormalized() * 10.0f);
}
//Draw the grid and axes
DrawAxes();
DrawGrid(100);
// draw physics objects
glEnable(GL_LIGHTING);
RenderPhysXScene();
glDisable(GL_LIGHTING);
//Show the fps
SetOrthoForFont(WINDOW_WIDTH, WINDOW_HEIGHT);
glColor3f(1, 1, 1);
RenderSpacedBitmapString(20, 20, 0, GLUT_BITMAP_HELVETICA_12, buffer);
ResetPerspectiveProjection();
// finish render
glutSwapBuffers();
}
bool CApp::FrameFunc( )
{
if( iLife <= 0 )
{
w_Window.setTitle( "Game Over" );
}
else
{
fSpawnTimer += 0.1f;
if( fSpawnTimer >= 10 )
{
fSpawnTimer = rand( ) % 800 / 100;
AddEnemy( 900, 100 + rand( ) % 500, 2.5f + float( ( rand( ) % 30 ) ) / 10.0f );
}
for( auto it : o_Object )
{
it->Update( );
if( it->x < 0 )
{
o_Object.remove( it );
iLife--;
char cTmp[20];
sprintf( cTmp, "Lifes: %d", iLife );
w_Window.setTitle( cTmp );
break;
}
if( it->x > 950 )
{
o_Object.remove( it );
break;
}
bool bDeleted = false;
for( auto it2 : o_Object )
{
if( it->sfr.intersects( it2->sfr ) && it->sfr != it2->sfr )
{
o_Object.remove( it2 );
bDeleted = true;
break;
}
}
if( bDeleted )
{
o_Object.remove( it );
break;
}
}
}
static float fReload = 0;
if ( sf::Keyboard::isKeyPressed( sf::Keyboard::Space ) && fReload <= 0 )
{
AddBullet( sf::Mouse::getPosition( ).x, sf::Mouse::getPosition( ).y );
fReload = 1.5f;
}
fReload -= 0.1f;
if( sf::Keyboard::isKeyPressed( sf::Keyboard::Escape ) )
return false;
return true;
}