# include <simgear_config.h>
#endif
+#include <osg/Fog>
#include <osg/Texture2D>
#include <osg/PositionAttitudeTransform>
+#include <osg/Vec4f>
#include <simgear/compiler.h>
-#include <plib/sg.h>
#include <simgear/math/sg_random.h>
#include <simgear/math/sg_geodesy.hxx>
-#include <simgear/math/polar3d.hxx>
#include <algorithm>
#include <vector>
using std::vector;
#include <simgear/environment/visual_enviro.hxx>
+#include <simgear/scene/util/RenderConstants.hxx>
+#include <simgear/scene/util/SGUpdateVisitor.hxx>
#include "sky.hxx"
#include "newcloud.hxx"
#include "cloudfield.hxx"
# endif
#endif
+using namespace simgear;
-#if defined (__CYGWIN__)
-#include <ieeefp.h>
-#endif
-double SGCloudField::fieldSize = 50000.0;
-float SGCloudField::density = 100.0;
+float SGCloudField::fieldSize = 50000.0f;
double SGCloudField::timer_dt = 0.0;
-sgVec3 SGCloudField::view_vec, SGCloudField::view_X, SGCloudField::view_Y;
-
-void SGCloudField::set_density(float density) {
- SGCloudField::density = density;
-}
+float SGCloudField::view_distance = 20000.0f;
+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 )
+ double dt, int asl )
{
- osg::Matrix T, LON, LAT;
-
+ osg::Matrix T, LON, LAT;
+
+ // 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));
+
+ // 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;
+
+ 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));
- osg::Vec3 u = up.osg();
- u.normalize();
-
- if ((last_lon == 0.0f) || (fabs(last_lon - lon) > 1.0) || (fabs(last_lat - lat) > 1.0))
- {
- // First time, or large delta requires repositioning from scratch.
- // TODO: Make this calculation better - a 0.5 degree shift will take a number
- // of reposition calls to correct at the moment.
-
- // combine p and asl (meters) to get translation offset.
- osg::Vec3 pos = p.osg();
- pos += u;
-
- T.makeTranslate(pos);
-
- field_transform->setMatrix( LAT*LON*T );
- last_lon = lon;
- last_lat = lat;
- last_pos = p.osg();
+ 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);
}
- else
- {
- // Rotation positon back to simple X-Z space.
- osg::Vec3 pos = last_pos;
- pos += u;
-
- T.makeTranslate(pos);
-
- osg::Matrix U = LAT*LON;
- osg::Vec3 x = osg::Vec3f(fieldSize, 0.0, 0.0)*U;
- osg::Vec3 y = osg::Vec3f(0.0, fieldSize, 0.0)*U;
-
- osg::Matrix V;
- V.makeIdentity();
- V.invert(U*T);
-
- osg::Vec3 q = pos*V;
-
- // Shift the field if we've moved away from the centre box.
- if (q.x() > fieldSize) last_pos = last_pos + x;
- if (q.x() < -fieldSize) last_pos = last_pos - x;
- if (q.y() > fieldSize) last_pos = last_pos + y;
- if (q.y() < -fieldSize) last_pos = last_pos - y;
-
- pos = last_pos;
- pos += u;
-
- T.makeTranslate(pos);
- field_transform->setMatrix( LAT*LON*T );
+
+ 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);
+ }
+
+ SGVec3<double> cart;
+ SGGeodesy::SGGeodToCart(SGGeod::fromRad(cld_pos.getLongitudeRad(), cld_pos.getLatitudeRad()), cart);
+ T.makeTranslate(toOsg(cart));
+
+ 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 );
+ }
+
+ // 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),
- field_group(new osg::Switch),
+ altitude_transform(new osg::PositionAttitudeTransform),
deltax(0.0),
deltay(0.0),
- last_lon(0.0),
- last_lat(0.0),
last_course(0.0),
- last_density(0.0),
- defined3D(false)
+ last_coverage(0.0),
+ coverage(0.0),
+ reposition_count(0),
+ defined3D(false)
{
- field_root->addChild(field_transform.get());
- field_group->setName("3Dcloud");
-
- // We duplicate the defined field group in a 3x3 array. This way,
- // we can simply shift entire groups around.
- 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(field_group.get());
- transform->setPosition(osg::Vec3(x*fieldSize, y * fieldSize, 0.0));
-
- field_transform->addChild(transform.get());
- }
+ cld_pos = SGGeoc();
+ 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();
+
+ 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());
}
-
+ }
+
+ int leafs = QUADTREE_SIZE / BRANCH_SIZE;
+
+ 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);
+ }
+ }
+
+ 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());
+ }
+ }
}
SGCloudField::~SGCloudField() {
void SGCloudField::clear(void) {
- int num_children = field_group->getNumChildren();
-
- for (int i = 0; i < num_children; i++) {
- field_group->removeChild(i);
+ 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);
}
- SGCloudField::defined3D = false;
+ }
+
+ SGCloudField::defined3D = false;
}
// use a table or else we see poping when moving the slider...
{1,1,1,1,1,1,1,1,1,1}
};
-void SGCloudField::applyDensity(void) {
+void SGCloudField::applyCoverage(void) {
- int row = (int) (density / 10.0);
+ int row = (int) (coverage * 10.0);
+ if (row > 9) row = 9;
int col = 0;
- int num_children = field_group->getNumChildren();
- if (density != last_density) {
- // Switch on/off the children depending on the required density.
- for (int i = 0; i < num_children; i++) {
+ 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->setValue(i, true);
+ field_group[x][y]->setValue(i, true);
} else {
- field_group->setValue(i, false);
+ field_group[x][y]->setValue(i, false);
}
+ }
}
+ }
}
- last_density = density;
+ last_coverage = coverage;
}
void SGCloudField::addCloud( SGVec3f& pos, SGNewCloud *cloud) {
defined3D = true;
- osg::ref_ptr<osg::LOD> lod = cloud->genCloud();
+ 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;
+
+ 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;
+
osg::ref_ptr<osg::PositionAttitudeTransform> transform = new osg::PositionAttitudeTransform;
- transform->setPosition(pos.osg());
- transform->addChild(lod.get());
+ transform->setPosition(toOsg(pos));
+ transform->addChild(geode.get());
+
+ field_group[x][y]->addChild(transform.get(), true);
+}
+
+void SGCloudField::applyVisRange(void) {
+
+ 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);
+ }
+ }
+ }
+}
+
+SGCloudField::CloudFog::CloudFog()
+{
+ fog = new osg::Fog;
+ fog->setMode(osg::Fog::EXP2);
+ fog->setDataVariance(osg::Object::DYNAMIC);
+}
- field_group->addChild(transform.get());
+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