double SGCloudField::timer_dt = 0.0;
float SGCloudField::view_distance = 20000.0f;
bool SGCloudField::wrap = true;
-float SGCloudField::RADIUS_LEVEL_1 = 20000.0f;
-float SGCloudField::RADIUS_LEVEL_2 = 5000.0f;
+float SGCloudField::RADIUS_LEVEL_1 = 5000.0f;
+float SGCloudField::RADIUS_LEVEL_2 = 1000.0f;
SGVec3f SGCloudField::view_vec, SGCloudField::view_X, SGCloudField::view_Y;
if (placed_root->getNumChildren() == 0) return false;
SGVec3<double> cart;
- SGGeodesy::SGGeodToCart(SGGeod::fromRadFt(lon, lat, 0.0f), cart);
+ SGGeod new_pos = SGGeod::fromRadFt(lon, lat, 0.0f);
+
+ SGGeodesy::SGGeodToCart(new_pos, cart);
osg::Vec3f osg_pos = toOsg(cart);
osg::Quat orient = toOsg(SGQuatd::fromLonLatRad(lon, lat) * SGQuatd::fromRealImag(0, SGVec3d(0, 1, 0)));
osg::Vec3f wind = osg::Vec3f(-cos((direction + 180)* SGD_DEGREES_TO_RADIANS) * speed * dt,
sin((direction + 180)* SGD_DEGREES_TO_RADIANS) * speed * dt,
0.0f);
- //cout << "Wind: " << direction << "@" << speed << "\n";
-
osg::Vec3f windosg = field_transform->getAttitude() * wind;
field_transform->setPosition(field_transform->getPosition() + windosg);
field_transform->setPosition(osg_pos);
field_transform->setAttitude(orient);
old_pos = osg_pos;
- } else {
+ } else {
+ osg::Quat fta = field_transform->getAttitude();
+ osg::Quat ftainv = field_transform->getAttitude().inverse();
+
// delta is the vector from the old position to the new position in cloud-coords
- osg::Vec3f delta = field_transform->getAttitude().inverse() * (osg_pos - old_pos);
- //cout << "Delta: " << delta.length() << "\n";
-
- for (unsigned int i = 0; i < placed_root->getNumChildren(); i++) {
- osg::ref_ptr<osg::LOD> lodnode1 = (osg::LOD*) placed_root->getChild(i);
- osg::Vec3f v = delta - lodnode1->getCenter();
-
- if ((v.x() < -0.5*fieldSize) ||
- (v.x() > 0.5*fieldSize) ||
- (v.y() < -0.5*fieldSize) ||
- (v.y() > 0.5*fieldSize) ) {
- //cout << "V: " << v.x() << ", " << v.y() << "\n";
-
- osg::Vec3f shift = osg::Vec3f(0.0f, 0.0f, 0.0f);
- if (v.x() > 0.5*fieldSize) { shift += osg::Vec3f(fieldSize, 0.0f, 0.0f); }
- if (v.x() < -0.5*fieldSize) { shift -= osg::Vec3f(fieldSize, 0.0f, 0.0f); }
-
- if (v.y() > 0.5*fieldSize) { shift += osg::Vec3f(0.0f, fieldSize, 0.0f); }
- if (v.y() < -0.5*fieldSize) { shift -= osg::Vec3f(0.0f, fieldSize, 0.0f); }
-
- //cout << "Shift: " << shift.x() << ", " << shift.y() << "\n\n";
-
- for (unsigned int j = 0; j < lodnode1->getNumChildren(); j++) {
- osg::ref_ptr<osg::LOD> lodnode2 = (osg::LOD*) lodnode1->getChild(j);
- for (unsigned int k = 0; k < lodnode2->getNumChildren(); k++) {
- osg::ref_ptr<osg::PositionAttitudeTransform> pat =(osg::PositionAttitudeTransform*) lodnode2->getChild(k);
- pat->setPosition(pat->getPosition() + shift);
- }
- }
+ osg::Vec3f delta = ftainv * (osg_pos - old_pos);
+ old_pos = osg_pos;
+
+ // Check if any of the clouds should be moved.
+ for(CloudHash::const_iterator itr = cloud_hash.begin(), end = cloud_hash.end();
+ itr != end;
+ ++itr) {
+
+ osg::ref_ptr<osg::PositionAttitudeTransform> pat = itr->second;
+ osg::Vec3f currpos = field_transform->getPosition() + fta * pat->getPosition();
+
+ // Determine the vector from the new position to the cloud in cloud-space.
+ osg::Vec3f w = ftainv * (currpos - toOsg(cart));
+
+ // Determine a course if required. Note that this involves some axis translation.
+ float x = 0.0;
+ float y = 0.0;
+ if (w.x() > 0.6*fieldSize) { y = fieldSize; }
+ if (w.x() < -0.6*fieldSize) { y = -fieldSize; }
+ if (w.y() > 0.6*fieldSize) { x = -fieldSize; }
+ if (w.y() < -0.6*fieldSize) { x = fieldSize; }
+
+ if ((x != 0.0) || (y != 0.0)) {
+ removeCloudFromTree(pat);
+ SGGeod p = SGGeod::fromCart(toSG(field_transform->getPosition() +
+ fta * pat->getPosition()));
+ addCloudToTree(pat, p, x, y);
}
- }
+ }
}
// Render the clouds in order from farthest away layer to nearest one.
float lon, float lat, float alt, float x, float y) {
// Get the base position
- SGGeod loc = SGGeod::fromDegFt(lon, lat, 0.0);
-
+ SGGeod loc = SGGeod::fromDegFt(lon, lat, alt);
+ addCloudToTree(transform, loc, x, y);
+}
+
+
+void SGCloudField::addCloudToTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform,
+ SGGeod loc, float x, float y) {
+
+ float alt = loc.getElevationFt();
// Determine any shift by x/y
if ((x != 0.0f) || (y != 0.0f)) {
- double crs;
-
- if (y == 0.0f) {
- crs = (x < 0.0f) ? -90.0 : 90.0;
- } else {
- crs = SG_RADIANS_TO_DEGREES * tan(x/y);
- }
-
+ double crs = 90.0 - SG_RADIANS_TO_DEGREES * atan2(y, x);
double dst = sqrt(x*x + y*y);
double endcrs;
- SGGeod base_pos = SGGeod::fromDegFt(lon, lat, 0.0f);
+ SGGeod base_pos = SGGeod::fromGeodFt(loc, 0.0f);
SGGeodesy::direct(base_pos, crs, dst, loc, endcrs);
}
- // The direct call provides the position at 0 alt, so adjust as required.
- loc.setElevationFt(alt);
+ // The direct call provides the position at 0 alt, so adjust as required.
+ loc.setElevationFt(alt);
+ addCloudToTree(transform, loc);
+}
+
+void SGCloudField::addCloudToTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform, SGGeod loc) {
// Work out where this cloud should go in OSG coordinates.
SGVec3<double> cart;
SGGeodesy::SGGeodToCart(loc, cart);
// Convert to the scenegraph orientation where we just rotate around
// the y axis 180 degrees.
osg::Quat orient = toOsg(SGQuatd::fromLonLatDeg(loc.getLongitudeDeg(), loc.getLatitudeDeg()) * SGQuatd::fromRealImag(0, SGVec3d(0, 1, 0)));
-
- field_transform->setPosition(toOsg(fieldcenter));
+
+ osg::Vec3f osg_pos = toOsg(fieldcenter);
+
+ field_transform->setPosition(osg_pos);
field_transform->setAttitude(orient);
- old_pos = toOsg(fieldcenter);
+ old_pos = osg_pos;
}
-
+
+ // Convert position to cloud-coordinates
pos = pos - field_transform->getPosition();
-
- //pos = orient.inverse() * pos;
- pos = field_transform->getAttitude().inverse() * pos;
+ pos = field_transform->getAttitude().inverse() * pos;
// We have a two level dynamic quad tree which the cloud will be added
// to. If there are no appropriate nodes in the quad tree, they are
lodnode1 = (osg::LOD*) placed_root->getChild(i);
if ((lodnode1->getCenter() - pos).length2() < RADIUS_LEVEL_1*RADIUS_LEVEL_1) {
// New cloud is within RADIUS_LEVEL_1 of the center of the LOD node.
- //cout << "Adding cloud to existing LoD level 1 node. Distance:" << (lodnode1->getCenter() - pos).length() << "\n";
found = true;
}
}
if (!found) {
lodnode1 = new osg::LOD();
placed_root->addChild(lodnode1.get());
- //cout << "Adding cloud to new LoD node\n";
}
// Now check if there is a second level LOD node at an appropriate distance
lodnode = (osg::LOD*) lodnode1->getChild(j);
if ((lodnode->getCenter() - pos).length2() < RADIUS_LEVEL_2*RADIUS_LEVEL_2) {
// We've found the right leaf LOD node
- //cout << "Found existing LOD leaf node. Distance:"<< (lodnode->getCenter() - pos).length() << "\n";
found = true;
- }
}
+ }
if (!found) {
// No suitable leave node was found, so we need to add one.
lodnode = new osg::LOD();
lodnode1->addChild(lodnode, 0.0f, 4*RADIUS_LEVEL_1);
- //cout << "Adding cloud to new LoD node\n";
-}
+ }
transform->setPosition(pos);
lodnode->addChild(transform.get(), 0.0f, view_distance);
bool visible;
};
- float Rnd(float);
+ float Rnd(float);
// Radius of the LoD nodes for the dynamic quadtrees.
static float RADIUS_LEVEL_1;
// this is a relative position only, with that we can move all clouds at once
SGVec3f relative_position;
- osg::ref_ptr<osg::Group> field_root;
+ osg::ref_ptr<osg::Group> field_root;
osg::ref_ptr<osg::Group> placed_root;
osg::ref_ptr<osg::PositionAttitudeTransform> field_transform;
- osg::ref_ptr<osg::PositionAttitudeTransform> altitude_transform;
- osg::ref_ptr<osg::LOD> field_lod;
+ osg::ref_ptr<osg::PositionAttitudeTransform> altitude_transform;
+ osg::ref_ptr<osg::LOD> field_lod;
osg::Vec3f old_pos;
CloudHash cloud_hash;
- struct CloudFog : public simgear::Singleton<CloudFog>
- {
- CloudFog();
- osg::ref_ptr<osg::Fog> fog;
- };
+ struct CloudFog : public simgear::Singleton<CloudFog>
+ {
+ CloudFog();
+ osg::ref_ptr<osg::Fog> fog;
+ };
void removeCloudFromTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform);
void addCloudToTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform, float lon, float lat, float alt, float x, float y);
+ void addCloudToTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform, SGGeod loc, float x, float y);
+ void addCloudToTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform, SGGeod loc);
void applyVisRangeAndCoverage(void);
public:
/**
- * reposition the cloud layer at the specified origin and
- * orientation.
- * @param p position vector
- * @param up the local up vector
- * @param lon specifies a rotation about the Z axis
- * @param lat specifies a rotation about the new Y axis
- * @param dt the time elapsed since the last call
- * @param asl altitude of the layer
- * @param speed of cloud layer movement (due to wind)
- * @param direction of cloud layer movement (due to wind)
- */
- bool reposition( const SGVec3f& p, const SGVec3f& up,
- double lon, double lat, double dt, int asl, float speed, float direction);
-
- osg::Group* getNode() { return field_root.get(); }
-
- // visibility distance for clouds in meters
- static float CloudVis;
-
- static SGVec3f view_vec, view_X, view_Y;
-
- static float view_distance;
- static double timer_dt;
- static float fieldSize;
- static bool wrap;
-
- static bool getWrap(void) { return wrap; }
- static void setWrap(bool w) { wrap = w; }
-
- static float getVisRange(void) { return view_distance; }
- static void setVisRange(float d) { view_distance = d; }
- void applyVisRange(void);
-
- static osg::Fog* getFog()
- {
- return CloudFog::instance()->fog.get();
- }
- static void updateFog(double visibility, const osg::Vec4f& color);
+ * reposition the cloud layer at the specified origin and
+ * orientation.
+ * @param p position vector
+ * @param up the local up vector
+ * @param lon specifies a rotation about the Z axis
+ * @param lat specifies a rotation about the new Y axis
+ * @param dt the time elapsed since the last call
+ * @param asl altitude of the layer
+ * @param speed of cloud layer movement (due to wind)
+ * @param direction of cloud layer movement (due to wind)
+ */
+ bool reposition( const SGVec3f& p, const SGVec3f& up,
+ double lon, double lat, double dt, int asl, float speed, float direction);
+
+ osg::Group* getNode() { return field_root.get(); }
+
+ // visibility distance for clouds in meters
+ static float CloudVis;
+
+ static SGVec3f view_vec, view_X, view_Y;
+
+ static float view_distance;
+ static double timer_dt;
+ static float fieldSize;
+ static bool wrap;
+
+ static bool getWrap(void) { return wrap; }
+ static void setWrap(bool w) { wrap = w; }
+
+ static float getVisRange(void) { return view_distance; }
+ static void setVisRange(float d) { view_distance = d; }
+ void applyVisRange(void);
+
+ static osg::Fog* getFog()
+ {
+ return CloudFog::instance()->fog.get();
+ }
+ static void updateFog(double visibility, const osg::Vec4f& color);
};
#endif // _CLOUDFIELD_HXX
projects / simgear.git / commitdiff