Hi people,
I have a scene with master camera and 4 slave cameras.
I try to change the angle HPR on my slave cameras, but when that change the
Heading angle, which makes changing the roll,
and when change Roll angle, what it does is change the Heading. However the
pitch is working well.
What am I doing wrong?
Example code:
int main(int, char **)
{
osgViewer::Viewer viewer;
viewer.setSceneData(osgDB::readNodeFile("cow.osg"));
osg::GraphicsContext::WindowingSystemInterface* wsi =
osg::GraphicsContext::getWindowingSystemInterface();
unsigned int width, height;
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0),
width, height);
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
traits->x = 0;
traits->y = 0;
traits->width = width;
traits->height = height;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
unsigned int numCameras = 4;
double aspectRatioScale = 1.0;//(double)numCameras;
for(unsigned int i=0; i<numCameras;++i)
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new
osg::Viewport((i*width)/numCameras,(i*height)/numCameras, width/numCameras,
height/numCameras));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd());
}
double angle(0.);
osg::Matrix rot = osg::Matrix::identity();
// CHANGE HEADING
osg::Vec3 hpr;
hpr[0] = 10.0f;
hpr[1] = 0.0f;
hpr[2] = 0.0f;
osg::Matrix H;
H.makeRotate(osg::DegreesToRadians(hpr[0]), osg::Vec3(0,0,1)); //
heading ->
osg::Matrix P;
P.makeRotate(osg::DegreesToRadians(hpr[1]), osg::Vec3(1,0,0)); // pitch
->
osg::Matrix R;
R.makeRotate(osg::DegreesToRadians(hpr[2]), osg::Vec3(0,1,0)); // roll
->
rot = H*P*R;
viewer.getSlave(0)._viewOffset = rot;
// CHANGE PITCH
hpr[0] = 0.0f;
hpr[1] = 10.0f;
hpr[2] = 0.0f;
H = osg::Matrix::identity();
P = osg::Matrix::identity();
R = osg::Matrix::identity();
H.makeRotate(osg::DegreesToRadians(hpr[0]), osg::Vec3(0,0,1)); //
heading ->
P.makeRotate(osg::DegreesToRadians(hpr[1]), osg::Vec3(1,0,0)); // pitch
->
R.makeRotate(osg::DegreesToRadians(hpr[2]), osg::Vec3(0,1,0)); // roll
->
rot = H*P*R;
viewer.getSlave(1)._viewOffset = rot;
// CHANGE ROLL
hpr[0] = 0.0f;
hpr[1] = 0.0f;
hpr[2] = 10.0f;
H = osg::Matrix::identity();
P = osg::Matrix::identity();
R = osg::Matrix::identity();
H.makeRotate(osg::DegreesToRadians(hpr[0]), osg::Vec3(0,0,1)); //
heading ->
P.makeRotate(osg::DegreesToRadians(hpr[1]), osg::Vec3(1,0,0)); // pitch
->
R.makeRotate(osg::DegreesToRadians(hpr[2]), osg::Vec3(0,1,0)); // roll
->
rot = H*P*R;
viewer.getSlave(2)._viewOffset = rot;
viewer.run();
}
--
DTC
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