#include <osg/Texture2D>
#include <osg/PositionAttitudeTransform>
#include <osg/Vec4f>
+#include <osgSim/Impostor>
#include <simgear/compiler.h>
-#include <plib/sg.h>
#include <simgear/math/sg_random.h>
#include <simgear/math/sg_geodesy.hxx>
+#include <simgear/scene/util/SGSceneUserData.hxx>
#include <algorithm>
#include <vector>
+#include <iostream>
+
+using namespace std;
using std::vector;
-#include <simgear/environment/visual_enviro.hxx>
+//#include <simgear/environment/visual_enviro.hxx>
#include <simgear/scene/util/RenderConstants.hxx>
#include <simgear/scene/util/SGUpdateVisitor.hxx>
#include "sky.hxx"
using namespace simgear;
-
float SGCloudField::fieldSize = 50000.0f;
double SGCloudField::timer_dt = 0.0;
float SGCloudField::view_distance = 20000.0f;
-sgVec3 SGCloudField::view_vec, SGCloudField::view_X, SGCloudField::view_Y;
+bool SGCloudField::wrap = true;
+float SGCloudField::MAX_CLOUD_DEPTH = 2000.0f;
+bool SGCloudField::use_impostors = false;
+float SGCloudField::lod1_range = 8000.0f;
+float SGCloudField::lod2_range = 4000.0f;
+float SGCloudField::impostor_distance = 15000.0f;
+
+int impostorcount = 0;
+int lodcount = 0;
+int cloudcount = 0;
-// reposition the cloud layer at the specified origin and orientation
+SGVec3f SGCloudField::view_vec, SGCloudField::view_X, SGCloudField::view_Y;
+
+
+// Reposition the cloud layer at the specified origin and orientation
bool SGCloudField::reposition( const SGVec3f& p, const SGVec3f& up, double lon, double lat,
- double dt, int asl )
-{
- osg::Matrix T, LON, LAT;
+ double dt, int asl, float speed, float direction ) {
+ // Determine any movement of the placed clouds
+ if (placed_root->getNumChildren() == 0) return false;
+
+ SGVec3<double> 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)));
// Always update the altitude transform, as this allows
// the clouds to rise and fall smoothly depending on environment updates.
- altitude_transform->setPosition(osg::Vec3d(0.0, 0.0, (double) asl));
+ altitude_transform->setPosition(osg::Vec3f(0.0f, 0.0f, (float) asl));
- // Calculating the reposition information is expensive.
- // Only perform the reposition every 60 frames.
- reposition_count = (reposition_count + 1) % 60;
- if ((reposition_count != 0) || !defined3D) return false;
+ // Similarly, always determine the effects of the wind
+ 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);
+ osg::Vec3f windosg = field_transform->getAttitude() * wind;
+ field_transform->setPosition(field_transform->getPosition() + windosg);
- SGGeoc pos = SGGeoc::fromGeod(SGGeod::fromRad(lon, lat));
-
- double dist = SGGeodesy::distanceM(cld_pos, pos);
-
- if (dist > (fieldSize * 2)) {
- // First time or very large distance
- SGVec3<double> cart;
- SGGeodesy::SGGeodToCart(SGGeod::fromRad(lon, lat), cart);
- T.makeTranslate(toOsg(cart));
-
- LON.makeRotate(lon, osg::Vec3(0, 0, 1));
- LAT.makeRotate(90.0 * SGD_DEGREES_TO_RADIANS - lat, osg::Vec3(0, 1, 0));
-
- field_transform->setMatrix( LAT*LON*T );
- cld_pos = SGGeoc::fromGeod(SGGeod::fromRad(lon, lat));
- } else if (dist > fieldSize) {
- // Distance requires repositioning of cloud field.
- // We can easily work out the direction to reposition
- // from the course between the cloud position and the
- // camera position.
- SGGeoc pos = SGGeoc::fromGeod(SGGeod::fromRad(lon, lat));
-
- float crs = SGGeoc::courseDeg(cld_pos, pos);
- if ((crs < 45.0) || (crs > 315.0)) {
- SGGeodesy::advanceRadM(cld_pos, 0.0, fieldSize, cld_pos);
- }
-
- if ((crs > 45.0) && (crs < 135.0)) {
- SGGeodesy::advanceRadM(cld_pos, SGD_PI_2, fieldSize, cld_pos);
- }
-
- if ((crs > 135.0) && (crs < 225.0)) {
- SGGeodesy::advanceRadM(cld_pos, SGD_PI, fieldSize, cld_pos);
- }
-
- if ((crs > 225.0) && (crs < 315.0)) {
- SGGeodesy::advanceRadM(cld_pos, SGD_PI + SGD_PI_2, fieldSize, cld_pos);
- }
+ if (!wrap) {
+ // If we're not wrapping the cloudfield, then we make no effort to reposition
+ return false;
+ }
- SGVec3<double> cart;
- SGGeodesy::SGGeodToCart(SGGeod::fromRad(cld_pos.getLongitudeRad(), cld_pos.getLatitudeRad()), cart);
- T.makeTranslate(toOsg(cart));
+ if ((old_pos - osg_pos).length() > fieldSize*2) {
+ // Big movement - reposition centered to current location.
+ field_transform->setPosition(osg_pos);
+ field_transform->setAttitude(orient);
+ old_pos = osg_pos;
+ } else {
+ osg::Quat fta = field_transform->getAttitude();
+ osg::Quat ftainv = field_transform->getAttitude().inverse();
- LON.makeRotate(cld_pos.getLongitudeRad(), osg::Vec3(0, 0, 1));
- LAT.makeRotate(90.0 * SGD_DEGREES_TO_RADIANS - cld_pos.getLatitudeRad(), osg::Vec3(0, 1, 0));
-
- field_transform->setMatrix( LAT*LON*T );
+ // delta is the vector from the old position to the new position in cloud-coords
+ // 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;
+
+ if (pat == 0) {
+ continue;
+ }
+
+ 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.
field_root->getStateSet()->setRenderBinDetails(CLOUDS_BIN, "DepthSortedBin");
-
return true;
}
SGCloudField::SGCloudField() :
field_root(new osg::Group),
- field_transform(new osg::MatrixTransform),
- altitude_transform(new osg::PositionAttitudeTransform),
- deltax(0.0),
- deltay(0.0),
- last_course(0.0),
- last_coverage(0.0),
- coverage(0.0),
- reposition_count(0),
- defined3D(false)
+ field_transform(new osg::PositionAttitudeTransform),
+ altitude_transform(new osg::PositionAttitudeTransform)
{
- cld_pos = SGGeoc();
+ old_pos = osg::Vec3f(0.0f, 0.0f, 0.0f);
field_root->addChild(field_transform.get());
field_root->setName("3D Cloud field root");
osg::StateSet *rootSet = field_root->getOrCreateStateSet();
rootSet->setRenderBinDetails(CLOUDS_BIN, "DepthSortedBin");
rootSet->setAttributeAndModes(getFog());
- osg::ref_ptr<osg::Group> quad_root = new osg::Group();
+ field_transform->addChild(altitude_transform.get());
+ placed_root = new osg::Group();
+ altitude_transform->addChild(placed_root);
+ impostorcount = 0;
+ lodcount = 0;
+ cloudcount = 0;
+}
- for (int i = 0; i < BRANCH_SIZE; i++) {
- for (int j = 0; j < BRANCH_SIZE; j++) {
- quad[i][j] = new osg::LOD();
- quad[i][j]->setName("Quad");
- quad_root->addChild(quad[i][j].get());
- }
+SGCloudField::~SGCloudField() {
+}
+
+
+void SGCloudField::clear(void) {
+
+ for(CloudHash::const_iterator itr = cloud_hash.begin(), end = cloud_hash.end();
+ itr != end;
+ ++itr) {
+ removeCloudFromTree(itr->second);
}
- int leafs = QUADTREE_SIZE / BRANCH_SIZE;
+ cloud_hash.clear();
+}
- for (int x = 0; x < QUADTREE_SIZE; x++) {
- for (int y = 0; y < QUADTREE_SIZE; y++) {
- field_group[x][y]= new osg::Switch;
- field_group[x][y]->setName("3D cloud group");
-
- // Work out where to put this node in the quad tree
- int i = x / leafs;
- int j = y / leafs;
- quad[i][j]->addChild(field_group[x][y].get(), 0.0f, view_distance);
+void SGCloudField::applyVisAndLoDRange(void)
+{
+ for (unsigned int i = 0; i < placed_root->getNumChildren(); i++) {
+ osg::ref_ptr<osg::LOD> lodnode1 = (osg::LOD*) placed_root->getChild(i);
+ for (unsigned int j = 0; j < lodnode1->getNumChildren(); j++) {
+ lodnode1->setRange(j, 0.0f, lod1_range + lod2_range + view_distance + MAX_CLOUD_DEPTH);
+ osg::ref_ptr<osg::LOD> lodnode2 = (osg::LOD*) lodnode1->getChild(j);
+ for (unsigned int k = 0; k < lodnode2->getNumChildren(); k++) {
+ lodnode2->setRange(k, 0.0f, view_distance + MAX_CLOUD_DEPTH);
+ }
}
}
-
- field_transform->addChild(altitude_transform.get());
-
- // We duplicate the defined field group in a 3x3 array. This way,
- // we can simply shift entire groups around.
- // TODO: "Bend" the edge groups so when shifted they line up.
- // Currently the clouds "jump down" when we reposition them.
- for(int x = -1 ; x <= 1 ; x++) {
- for(int y = -1 ; y <= 1 ; y++ ) {
- osg::ref_ptr<osg::PositionAttitudeTransform> transform =
- new osg::PositionAttitudeTransform;
- transform->addChild(quad_root.get());
- transform->setPosition(osg::Vec3(x*fieldSize, y * fieldSize, 0.0));
+}
- altitude_transform->addChild(transform.get());
+bool SGCloudField::addCloud(float lon, float lat, float alt, int index, osg::ref_ptr<EffectGeode> geode) {
+ return addCloud(lon, lat, alt, 0.0f, 0.0f, index, geode);
+}
+
+bool SGCloudField::addCloud(float lon, float lat, float alt, float x, float y, int index, osg::ref_ptr<EffectGeode> geode) {
+ // If this cloud index already exists, don't replace it.
+ if (cloud_hash[index]) return false;
+
+ osg::ref_ptr<osg::PositionAttitudeTransform> transform = new osg::PositionAttitudeTransform;
+
+ transform->addChild(geode.get());
+ addCloudToTree(transform, lon, lat, alt, x, y);
+ cloud_hash[index] = transform;
+ return true;
+}
+
+// Remove a give cloud from inside the tree, without removing it from the cloud hash
+void SGCloudField::removeCloudFromTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform)
+{
+ if (transform == 0)
+ {
+ // Ooops!
+ return;
+ }
+ osg::ref_ptr<osg::Group> lodnode = transform->getParent(0);
+ lodnode->removeChild(transform);
+ cloudcount--;
+
+ if (lodnode->getNumChildren() == 0) {
+ osg::ref_ptr<osg::Group> lodnode1 = lodnode->getParent(0);
+ osg::ref_ptr<osgSim::Impostor> impostornode = (osgSim::Impostor*) lodnode1->getParent(0);
+
+ lodnode1->removeChild(lodnode);
+ lodcount--;
+
+ if (lodnode1->getNumChildren() == 0) {
+ impostornode->removeChild(lodnode1);
+ placed_root->removeChild(impostornode);
+ impostorcount--;
}
}
}
-SGCloudField::~SGCloudField() {
+void SGCloudField::addCloudToTree(osg::ref_ptr<osg::PositionAttitudeTransform> transform,
+ float lon, float lat, float alt, float x, float y) {
+
+ // Get the base position
+ SGGeod loc = SGGeod::fromDegFt(lon, lat, alt);
+ addCloudToTree(transform, loc, x, y);
}
-void SGCloudField::clear(void) {
- for (int x = 0; x < QUADTREE_SIZE; x++) {
- for (int y = 0; y < QUADTREE_SIZE; y++) {
- int num_children = field_group[x][y]->getNumChildren();
- field_group[x][y]->removeChildren(0, num_children);
- }
+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 = 90.0 - SG_RADIANS_TO_DEGREES * atan2(y, x);
+ double dst = sqrt(x*x + y*y);
+ double endcrs;
+
+ SGGeod base_pos = SGGeod::fromGeodFt(loc, 0.0f);
+ SGGeodesy::direct(base_pos, crs, dst, loc, endcrs);
}
- SGCloudField::defined3D = false;
+ // 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);
+ osg::Vec3f pos = toOsg(cart);
+
+
+ if (old_pos == osg::Vec3f(0.0f, 0.0f, 0.0f)) {
+ // First setup.
+ SGVec3<double> fieldcenter;
+ SGGeodesy::SGGeodToCart(SGGeod::fromDegFt(loc.getLongitudeDeg(), loc.getLatitudeDeg(), 0.0f), fieldcenter);
+ // 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)));
+
+ osg::Vec3f osg_pos = toOsg(fieldcenter);
+
+ field_transform->setPosition(osg_pos);
+ field_transform->setAttitude(orient);
+ old_pos = osg_pos;
+ }
+
+ // Convert position to cloud-coordinates
+ pos = pos - field_transform->getPosition();
+ 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
+ // created as required.
+ bool found = false;
+ osg::ref_ptr<osg::LOD> lodnode1;
+ osg::ref_ptr<osg::LOD> lodnode;
+ osg::ref_ptr<osgSim::Impostor> impostornode;
+
+ for (unsigned int i = 0; (!found) && (i < placed_root->getNumChildren()); i++) {
+ lodnode1 = (osg::LOD*) placed_root->getChild(i);
+ if ((lodnode1->getCenter() - pos).length2() < lod1_range*lod1_range) {
+ // New cloud is within RADIUS_LEVEL_1 of the center of the LOD node.
+ found = true;
+ }
+ }
-// use a table or else we see poping when moving the slider...
-static int densTable[][10] = {
- {0,0,0,0,0,0,0,0,0,0},
- {1,0,0,0,0,0,0,0,0,0},
- {1,0,0,0,1,0,0,0,0,0},
- {1,0,0,0,1,0,0,1,0,0}, // 30%
- {1,0,1,0,1,0,0,1,0,0},
- {1,0,1,0,1,0,1,1,0,0}, // 50%
- {1,0,1,0,1,0,1,1,0,1},
- {1,0,1,1,1,0,1,1,0,1}, // 70%
- {1,1,1,1,1,0,1,1,0,1},
- {1,1,1,1,1,0,1,1,1,1}, // 90%
- {1,1,1,1,1,1,1,1,1,1}
-};
-
-void SGCloudField::applyCoverage(void) {
-
- int row = (int) (coverage * 10.0);
- if (row > 9) row = 9;
- int col = 0;
-
- if (coverage != last_coverage) {
- for (int x = 0; x < QUADTREE_SIZE; x++) {
- for (int y = 0; y < QUADTREE_SIZE; y++) {
- // Switch on/off the children depending on the required coverage.
- int num_children = field_group[x][y]->getNumChildren();
- for (int i = 0; i < num_children; i++) {
- if (++col > 9) col = 0;
- if ( densTable[row][col] ) {
- field_group[x][y]->setValue(i, true);
- } else {
- field_group[x][y]->setValue(i, false);
- }
- }
- }
- }
+ if (!found) {
+ if (use_impostors) {
+ impostornode = new osgSim::Impostor();
+ impostornode->setImpostorThreshold(impostor_distance);
+ //impostornode->setImpostorThresholdToBound();
+ //impostornode->setCenter(pos);
+ placed_root->addChild(impostornode.get());
+ lodnode1 = (osg::ref_ptr<osg::LOD>) impostornode;
+ } else {
+ lodnode1 = new osg::LOD();
+ placed_root->addChild(lodnode1.get());
}
+ impostorcount++;
+ }
- last_coverage = coverage;
-}
+ // Now check if there is a second level LOD node at an appropriate distance
+ found = false;
+
+ for (unsigned int j = 0; (!found) && (j < lodnode1->getNumChildren()); j++) {
+ lodnode = (osg::LOD*) lodnode1->getChild(j);
+ if ((lodnode->getCenter() - pos).length2() < lod2_range*lod2_range) {
+ // We've found the right leaf LOD node
+ found = true;
+ }
+ }
-void SGCloudField::addCloud( SGVec3f& pos, SGNewCloud *cloud) {
- defined3D = true;
- osg::ref_ptr<osg::Geode> geode = cloud->genCloud();
-
- // Determine which quadtree to put it in.
- int x = (int) floor((pos.x() + fieldSize/2.0) * QUADTREE_SIZE / fieldSize);
- if (x >= QUADTREE_SIZE) x = (QUADTREE_SIZE - 1);
- if (x < 0) x = 0;
+ if (!found) {
+ // No suitable leaf node was found, so we need to add one.
+ lodnode = new osg::LOD();
+ lodnode1->addChild(lodnode, 0.0f, lod1_range + lod2_range + view_distance + MAX_CLOUD_DEPTH);
+ lodcount++;
+ }
+
+ transform->setPosition(pos);
+ lodnode->addChild(transform.get(), 0.0f, view_distance + MAX_CLOUD_DEPTH);
+ cloudcount++;
+ SG_LOG(SG_ENVIRONMENT, SG_DEBUG, "Impostors: " << impostorcount <<
+ " LoD: " << lodcount <<
+ " Clouds: " << cloudcount);
+
+ lodnode->dirtyBound();
+ lodnode1->dirtyBound();
+ field_root->dirtyBound();
+}
- int y = (int) floor((pos.y() + fieldSize/2.0) * QUADTREE_SIZE / fieldSize);
- if (y >= QUADTREE_SIZE) y = (QUADTREE_SIZE - 1);
- if (y < 0) y = 0;
+bool SGCloudField::deleteCloud(int identifier) {
+ osg::ref_ptr<osg::PositionAttitudeTransform> transform = cloud_hash[identifier];
+ if (transform == 0) return false;
- osg::ref_ptr<osg::PositionAttitudeTransform> transform = new osg::PositionAttitudeTransform;
+ removeCloudFromTree(transform);
+ cloud_hash.erase(identifier);
- transform->setPosition(toOsg(pos));
- transform->addChild(geode.get());
+ return true;
+}
- field_group[x][y]->addChild(transform.get(), true);
+bool SGCloudField::repositionCloud(int identifier, float lon, float lat, float alt) {
+ return repositionCloud(identifier, lon, lat, alt, 0.0f, 0.0f);
}
-void SGCloudField::applyVisRange(void) {
+bool SGCloudField::repositionCloud(int identifier, float lon, float lat, float alt, float x, float y) {
+ osg::ref_ptr<osg::PositionAttitudeTransform> transform = cloud_hash[identifier];
- for (int x = 0; x < BRANCH_SIZE; x++) {
- for (int y = 0; y < BRANCH_SIZE; y++) {
- int num_children = quad[x][y]->getNumChildren();
- for (int i = 0; i < num_children; i++) {
- quad[x][y]->setRange(i, 0.0f, view_distance);
- }
- }
+ if (transform == NULL) return false;
+
+ removeCloudFromTree(transform);
+ addCloudToTree(transform, lon, lat, alt, x, y);
+ return true;
}
+
+bool SGCloudField::isDefined3D(void) {
+ return (! cloud_hash.empty());
}
-SGCloudField::CloudFog::CloudFog()
-{
+SGCloudField::CloudFog::CloudFog() {
fog = new osg::Fog;
fog->setMode(osg::Fog::EXP2);
fog->setDataVariance(osg::Object::DYNAMIC);
}
-void SGCloudField::updateFog(double visibility, const osg::Vec4f& color)
-{
+void SGCloudField::updateFog(double visibility, const osg::Vec4f& color) {
const double sqrt_m_log01 = sqrt(-log(0.01));
osg::Fog* fog = CloudFog::instance()->fog.get();
fog->setColor(color);
fog->setDensity(sqrt_m_log01 / visibility);
}
+
projects / simgear.git / blobdiff