/**
* @function redisplay
* (Called at each openGL step)
* - Processes the webcam frame to detect the eyes with OpenCV,
* - Creates a 3D scene with OpenGL,
* - Render the scene and the webcam image.
*/
void redisplay()
{
if(frame.empty()) return;
if(!bPause)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// OPENCV
//-- flip frame image
cv::Mat tempimage;
if(bInvertCam) cv::flip(frame, tempimage, 0);
else cv::flip(frame, tempimage, 1);
//-- detect eyes
tempimage = detectEyes(tempimage);
// OPENGL
//-- scene
setGlCamera();
draw3dScene();
//-- cam
if(bDisplayCam) displayCam(tempimage);
// RENDER
glutSwapBuffers();
}
//-- post the next redisplay
glutPostRedisplay();
}
void OrthRoot::setCameraForDraw(ci::Matrix44f& m){
if(mCameraDirty) {
setCinderCamera();
}
setGlCamera();
// Account for src rect translation
if(mSrcRect.x2 > mSrcRect.x1 && mSrcRect.y2 > mSrcRect.y1) {
const float sx = mDstRect.getWidth() / mSrcRect.getWidth(),
sy = mDstRect.getHeight() / mSrcRect.getHeight();
m.translate(ci::Vec3f(-mSrcRect.x1*sx, -mSrcRect.y1*sy, 0.0f));
m.scale(ci::Vec3f(sx, sy, 1.0f));
}
}
void PerspRoot::drawFunc(const std::function<void(void)>& fn) {
// XXX This shouldn't be necessary - the OrthoRoot should be setting
// all camera properties whenever it draws. But for some reason, without
// this, no later ortho roots will draw (but then it's fine once you go
// back to the first root). This inspite of the fact that the ortho
// setGlCamera code calls everything this does.
gl::SaveCamera save_camera;
if (mCameraDirty) {
setCinderCamera();
}
setGlCamera();
glClear(GL_DEPTH_BUFFER_BIT);
fn();
}
