bool cGrMoon::reposition(sgVec3 p, double angle, double moonrightAscension, double moondeclination, double moon_dist)
{
sgMat4 T1, T2, GST, RA, DEC;
sgVec3 axis;
sgVec3 v;
sgMakeTransMat4( T1, p );
sgSetVec3( axis, 0.0, 0.0, -1.0 );
sgMakeRotMat4( GST, angle, axis );
sgSetVec3( axis, 0.0, 0.0, 1.0 );
sgMakeRotMat4( RA, (moonrightAscension * SGD_RADIANS_TO_DEGREES) - 90.0, axis );
sgSetVec3( axis, 1.0, 0.0, 0.0 );
sgMakeRotMat4( DEC, moondeclination * SGD_RADIANS_TO_DEGREES, axis );
sgSetVec3( v, 0.0, moon_dist, 0.0 );
sgMakeTransMat4( T2, v );
sgMat4 TRANSFORM;
sgCopyMat4( TRANSFORM, T1 );
sgPreMultMat4( TRANSFORM, GST );
sgPreMultMat4( TRANSFORM, RA );
sgPreMultMat4( TRANSFORM, DEC );
sgPreMultMat4( TRANSFORM, T2 );
sgCoord skypos;
sgSetCoord( &skypos, TRANSFORM );
moon_transform->setTransform( &skypos );
return true;
}
bool cGrCelestialBody::reposition( sgVec3 p, double angle, double rightAscension, double declination, double sol_dist )
{
sgMat4 T1, T2, GST, RA, DEC;
sgVec3 axis;
sgVec3 v;
sgMakeTransMat4( T1, p );
sgSetVec3( axis, 0.0, 0.0, -1.0 );
sgMakeRotMat4( GST, (float)angle, axis );
sgSetVec3( axis, 0.0, 0.0, 1.0 );
sgMakeRotMat4( RA, (float)((rightAscension * SGD_RADIANS_TO_DEGREES) - 90.0), axis );
sgSetVec3( axis, 1.0, 0.0, 0.0 );
sgMakeRotMat4( DEC, (float)(declination * SGD_RADIANS_TO_DEGREES), axis );
sgSetVec3( v, 0.0, (float)sol_dist, 0.0 );
sgMakeTransMat4( T2, v );
sgMat4 TRANSFORM;
sgCopyMat4( TRANSFORM, T1 );
sgPreMultMat4( TRANSFORM, GST );
sgPreMultMat4( TRANSFORM, RA );
sgPreMultMat4( TRANSFORM, DEC );
sgPreMultMat4( TRANSFORM, T2 );
sgCoord skypos;
sgSetCoord( &skypos, TRANSFORM );
transform->setTransform( &skypos );
return true;
}
bool cGrSkyDome::reposition( sgVec3 p, double lon, double lat, double spin )
{
sgMat4 T, LON, LAT, SPIN;
sgVec3 axis;
// Translate to view position
sgMakeTransMat4( T, p );
// Rotate to proper orientation
sgSetVec3( axis, 0.0, 0.0, 1.0 );
sgMakeRotMat4( LON, (float)(lon * SGD_RADIANS_TO_DEGREES), axis );
sgSetVec3( axis, 0.0, 1.0, 0.0 );
sgMakeRotMat4( LAT, (float)(90.0 - lat * SGD_RADIANS_TO_DEGREES), axis );
sgSetVec3( axis, 0.0, 0.0, 1.0 );
sgMakeRotMat4( SPIN, (float)(spin * SGD_RADIANS_TO_DEGREES), axis );
sgMat4 TRANSFORM;
sgCopyMat4( TRANSFORM, T );
sgPreMultMat4( TRANSFORM, LON );
sgPreMultMat4( TRANSFORM, LAT );
sgPreMultMat4( TRANSFORM, SPIN );
sgCoord skypos;
sgSetCoord( &skypos, TRANSFORM );
dome_transform->setTransform( &skypos );
asl = - skypos.xyz[2];
return true;
}
//
// Update the position of the moon image in the sky
//
void CMoonImage::Reposition (sgVec3 p, double theta, double lst, double lat,
double ra, double dec, double spin)
{
sgMat4 LST, LAT, RA, DEC, D, SCALE, ECLIPTIC, SPIN;
sgVec3 axis;
sgVec3 v;
// Create scaling matrix for moon illusion (appears larger near horizon)
float scale = 1.0f;
sgMakeIdentMat4 (SCALE);
float maxMagnification = 0.5f;
float minThreshold = DegToRad (80.0f);
float maxThreshold = DegToRad (95.0f);
float span = maxThreshold - minThreshold;
if ((theta >= minThreshold) && (theta <= maxThreshold)) {
sgMat4 I;
sgMakeIdentMat4 (I);
scale = 1.0f + (maxMagnification * (theta - minThreshold) / span);
sgScaleMat4 (SCALE, I, scale);
}
// Rotation matrix for latitude
sgSetVec3 (axis, -1.0f, 0, 0);
sgMakeRotMat4 (LAT, 90.0f-(float)lat, axis);
// Rotation matrix for local sidereal time, converted from h to deg
sgSetVec3 (axis, 0, 0, -1.0f);
sgMakeRotMat4 (LST, ((float)lst * 15), axis);
// Rotation matrix for right ascension
sgSetVec3 (axis, 0, 0, 1);
sgMakeRotMat4 (RA, RadToDeg ((float)ra), axis);
// Rotation matrix for declination
sgSetVec3 (axis, 1, 0, 0);
sgMakeRotMat4 (DEC, 90.0f - RadToDeg ((float)dec), axis);
// Translate moon distance
sgSetVec3 (v, 0, 0, distance);
sgMakeTransMat4 (D, v);
// Rotate to align moon equator with ecliptic
sgSetVec3 (axis, 1.0f, 0, 0);
sgMakeRotMat4 (ECLIPTIC, 90.0f, axis);
/// Rotate the moon image accurately towards the sun position
sgSetVec3 (axis, 0, 0, 1);
sgMakeRotMat4 (SPIN, spin, axis);
// Combine all transforms
sgMakeIdentMat4 (T);
sgPreMultMat4 (T, LAT);
sgPreMultMat4 (T, LST);
sgPreMultMat4 (T, RA);
sgPreMultMat4 (T, DEC);
sgPreMultMat4 (T, D);
sgPreMultMat4 (T, ECLIPTIC);
sgPreMultMat4 (T, SPIN);
}
bool cGrStars::reposition( sgVec3 p, double angle )
{
sgMat4 T1, GST;
sgVec3 axis;
sgMakeTransMat4( T1, p );
sgSetVec3( axis, 0.0, 0.0, -1.0 );
sgMakeRotMat4( GST, (float)angle, axis );
sgMat4 TRANSFORM;
sgCopyMat4( TRANSFORM, T1 );
sgPreMultMat4( TRANSFORM, GST );
sgCoord skypos;
sgSetCoord( &skypos, TRANSFORM );
stars_transform->setTransform( &skypos );
return true;
}
/**
* Create a CRRCControlSurfaceAnimation object
*
* Initialize the animation from an
* <animation type="ControlSurface"> tag
*/
CRRCControlSurfaceAnimation::CRRCControlSurfaceAnimation(SimpleXMLTransfer *xml)
: CRRCAnimation(new ssgTransform()), fallback_data(0.0f),
eventAdapter(this, &CRRCControlSurfaceAnimation::axisValueCallback, Event::Input),
aileron(0.0f), elevator(0.0f), rudder(0.0f), throttle(0.0f),
spoiler(0.0f), flap(0.0f), retract(0.0f), pitch(0.0f)
{
bool failed = false;
// evaluate <object> tag
SimpleXMLTransfer *map = xml->getChild("object", true);
symbolic_name = map->getString("name", "no_name_set");
max_angle = (float)(map->getDouble("max_angle", 0.0) * SG_RADIANS_TO_DEGREES);
abs_max_angle = (float)fabs((double)max_angle);
// find hinges and evaluate all <control> tags
int num_controls = 0;
int num_hinges = 0;
for (int i = 0; i < xml->getChildCount(); i++)
{
SimpleXMLTransfer *child = xml->getChildAt(i);
if (child->getName() == "hinge")
{
// found a <hinge> child
sgVec3 pos;
pos[SG_X] = (float)(-1 * child->getDouble("y", 0.0));
pos[SG_Y] = (float)(-1 * child->getDouble("x", 0.0));
pos[SG_Z] = (float)(-1 * child->getDouble("z", 0.0));
if (num_hinges == 0)
{
sgCopyVec3(hinge_1, pos);
}
else if (num_hinges == 1)
{
sgCopyVec3(hinge_2, pos);
}
num_hinges++;
}
else if (child->getName() == "control")
{
// found a <control> child
// The "*2" factor for each gain value scales the control input
// values from -0.5...+0.5 to -1.0...+1.0. This saves one
// float multiplication per mapping in the runtime update() routine.
std::string mapping = child->getString("mapping", "NOTHING");
float gain = (float)child->getDouble("gain", 1.0);
if (mapping == "ELEVATOR")
{
datasource.push_back(&elevator);
source_gain.push_back(gain * 2);
num_controls++;
}
else if (mapping == "AILERON")
{
datasource.push_back(&aileron);
source_gain.push_back(gain * 2);
num_controls++;
}
else if (mapping == "THROTTLE")
{
datasource.push_back(&throttle);
source_gain.push_back(gain * 2);
num_controls++;
}
else if (mapping == "RUDDER")
{
datasource.push_back(&rudder);
source_gain.push_back(gain * 2);
num_controls++;
}
else if (mapping == "FLAP")
{
datasource.push_back(&flap);
source_gain.push_back(gain * 2);
num_controls++;
}
else if (mapping == "SPOILER")
{
datasource.push_back(&spoiler);
source_gain.push_back(gain * 2);
num_controls++;
}
else if (mapping == "RETRACT")
{
datasource.push_back(&retract);
source_gain.push_back(gain * 2);
num_controls++;
}
else if (mapping == "PITCH")
{
datasource.push_back(&pitch);
source_gain.push_back(gain * 2);
num_controls++;
}
else
{
std::cerr << "ControlSurfaceAnimation: ignoring <control> tag without mapping." << std::endl;
}
}
}
if (num_controls < 1)
{
std::cerr << "ControlSurfaceAnimation: found animation without proper <control> tag. Animation disabled." << std::endl;
failed = true;
}
if (num_hinges < 2)
{
std::cerr << "ControlSurfaceAnimation: Must specify exactly two hinges!" << std::endl;
failed = true;
}
else
{
if (num_hinges > 2)
{
std::cerr << "ControlSurfaceAnimation: Must specify exactly two hinges!" << std::endl;
std::cerr << "ControlSurfaceAnimation: Ignoring excessive hinge tag(s)." << std::endl;
}
sgSubVec3(axis, hinge_2, hinge_1);
if (sgLengthVec3(axis) < 0.001)
{
std::cerr << "ControlSurfaceAnimation: Insufficient spacing between hinges!" << std::endl;
failed = true;
}
}
if (failed)
{
std::cerr << "ControlSurfaceAnimation: Animation setup failed." << std::endl;
// set to some non-critical defaults
datasource.resize(1);
datasource[0] = &fallback_data;
source_gain.resize(1);
source_gain[0] = 1.0;
sgSetVec3(hinge_1, 0.0f, 0.0f, 0.0f);
sgSetVec3(hinge_2, 1.0f, 0.0f, 0.0f);
sgSubVec3(axis, hinge_2, hinge_1);
}
sgMakeIdentMat4(move_to_origin);
move_to_origin[3][0] = -hinge_1[0];
move_to_origin[3][1] = -hinge_1[1];
move_to_origin[3][2] = -hinge_1[2];
sgMakeTransMat4(move_back, hinge_1);
realInit();
}
bool cGrCloudLayer::reposition( sgVec3 p, sgVec3 up, double lon, double lat, double alt, double dt )
{
sgMat4 T1, LON, LAT;
sgVec3 axis;
// combine p and asl (meters) to get translation offset
sgVec3 asl_offset;
sgCopyVec3( asl_offset, up );
sgNormalizeVec3( asl_offset );
if ( alt <= layer_asl )
{
sgScaleVec3( asl_offset, layer_asl );
}
else
{
sgScaleVec3( asl_offset, layer_asl + layer_thickness );
}
sgAddVec3( asl_offset, p );
// Translate to zero elevation
sgMakeTransMat4( T1, asl_offset );
// Rotate to proper orientation
sgSetVec3( axis, 0.0, 0.0, 1.0 );
sgMakeRotMat4( LON, (float)(lon * SGD_RADIANS_TO_DEGREES), axis );
sgSetVec3( axis, 0.0, 1.0, 0.0 );
sgMakeRotMat4( LAT, (float)(90.0 - lat * SGD_RADIANS_TO_DEGREES), axis );
sgMat4 TRANSFORM;
sgCopyMat4( TRANSFORM, T1 );
sgPreMultMat4( TRANSFORM, LON );
sgPreMultMat4( TRANSFORM, LAT );
sgCoord layerpos;
sgSetCoord( &layerpos, TRANSFORM );
layer_transform->setTransform( &layerpos );
// now calculate update texture coordinates
if ( last_lon < -900 )
{
last_lon = lon;
last_lat = lat;
}
double sp_dist = speed*dt;
if ( lon != last_lon || lat != last_lat || sp_dist != 0 )
{
double course = 0.0, dist = 0.0;
if ( lon != last_lon || lat != last_lat )
{
sgVec2 start, dest;
sgSetVec2(start, (float)last_lon, (float)last_lat);
sgSetVec2(dest, (float)lon, (float)lat);
calc_gc_course_dist( dest, start, &course, &dist );
}
// calculate cloud movement
double ax = 0.0, ay = 0.0, bx = 0.0, by = 0.0;
if (dist > 0.0)
{
ax = cos(course) * dist;
ay = sin(course) * dist;
}
if (sp_dist > 0)
{
bx = cos(-direction * SGD_DEGREES_TO_RADIANS) * sp_dist;
by = sin(-direction * SGD_DEGREES_TO_RADIANS) * sp_dist;
}
float xoff = (float)((ax + bx) / (2 * scale));
float yoff = (float)((ay + by) / (2 * scale));
const float layer_scale = layer_span / scale;
float *base, *tc;
base = tl[0]->get( 0 );
base[0] += xoff;
if ( base[0] > -10.0 && base[0] < 10.0 )
{
base[0] -= (int)base[0];
}
else
{
base[0] = 0.0;
ulSetError(UL_WARNING, "Warning: base1\n");
}
base[1] += yoff;
if ( base[1] > -10.0 && base[1] < 10.0 )
{
base[1] -= (int)base[1];
}
else
{
base[1] = 0.0;
ulSetError(UL_WARNING, "Warning: base2\n");
}
for (int i = 0; i < 4; i++)
{
tc = tl[i]->get( 0 );
sgSetVec2( tc, base[0] + layer_scale * i/4, base[1] );
for (int j = 0; j < 4; j++)
{
tc = tl[i]->get( j*2+1 );
sgSetVec2( tc, base[0] + layer_scale * (i+1)/4,
base[1] + layer_scale * j/4 );
tc = tl[i]->get( (j+1)*2 );
sgSetVec2( tc, base[0] + layer_scale * i/4,
base[1] + layer_scale * (j+1)/4 );
}
tc = tl[i]->get( 9 );
sgSetVec2( tc, base[0] + layer_scale * (i+1)/4,
base[1] + layer_scale );
}
last_lon = lon;
last_lat = lat;
}
return true;
}
bool cGrCloudLayer::repositionFlat( sgVec3 p, double dt )
{
sgMat4 T1;
// combine p and asl (meters) to get translation offset
sgVec3 asl_offset;
if ( p[SG_Z] <= layer_asl )
{
sgSetVec3( asl_offset, p[SG_X], p[SG_Y], layer_asl );
}
else
{
sgSetVec3( asl_offset, p[SG_X], p[SG_Y], layer_asl + layer_thickness );
}
// Translate to elevation
sgMakeTransMat4( T1, asl_offset );
sgMat4 TRANSFORM;
sgCopyMat4( TRANSFORM, T1 );
sgCoord layerpos;
sgSetCoord( &layerpos, TRANSFORM );
layer_transform->setTransform( &layerpos );
// now calculate update texture coordinates
double sp_dist = speed*dt;
if ( p[SG_X] != last_x || p[SG_Y] != last_y || sp_dist != 0 )
{
// calculate cloud movement
double ax = 0.0, ay = 0.0, bx = 0.0, by = 0.0;
ax = p[SG_X] - last_x;
ay = p[SG_Y] - last_y;
if (sp_dist > 0)
{
bx = cos(-direction * SGD_DEGREES_TO_RADIANS) * sp_dist;
by = sin(-direction * SGD_DEGREES_TO_RADIANS) * sp_dist;
}
float xoff = (float)((ax + bx) / (2 * scale));
float yoff = (float)((ay + by) / (2 * scale));
const float layer_scale = layer_span / scale;
float *base, *tc;
base = tl[0]->get( 0 );
base[0] += xoff;
// the while loops can lead to *long* pauses if base[0] comes
// with a bogus value.
// while ( base[0] > 1.0 ) { base[0] -= 1.0; }
// while ( base[0] < 0.0 ) { base[0] += 1.0; }
if ( base[0] > -10.0 && base[0] < 10.0 )
{
base[0] -= (int)base[0];
}
else
{
base[0] = 0.0;
ulSetError(UL_WARNING, "Warning: base1\n");
}
base[1] += yoff;
// the while loops can lead to *long* pauses if base[0] comes
// with a bogus value.
// while ( base[1] > 1.0 ) { base[1] -= 1.0; }
// while ( base[1] < 0.0 ) { base[1] += 1.0; }
if ( base[1] > -10.0 && base[1] < 10.0 )
{
base[1] -= (int)base[1];
}
else
{
base[1] = 0.0;
ulSetError(UL_WARNING, "Warning: base2\n");
}
for (int i = 0; i < 4; i++)
{
tc = tl[i]->get( 0 );
sgSetVec2( tc, base[0] + layer_scale * i/4, base[1] );
for (int j = 0; j < 4; j++)
{
tc = tl[i]->get( j*2+1 );
sgSetVec2( tc, base[0] + layer_scale * (i+1)/4,
base[1] + layer_scale * j/4 );
tc = tl[i]->get( (j+1)*2 );
sgSetVec2( tc, base[0] + layer_scale * i/4,
base[1] + layer_scale * (j+1)/4 );
}
tc = tl[i]->get( 9 );
sgSetVec2( tc, base[0] + layer_scale * (i+1)/4,
base[1] + layer_scale );
}
last_x = p[SG_X];
last_y = p[SG_Y];
}
return true;
}
void calc_coord(void)
{
sgMat4 m, m2;
int i, j;
tFace *curFace;
float width, height;
float scale, offX, offY;
int largerRow;
float maxWidth;
int col;
ssgBranch *branch;
ColWidth = (float*)calloc(NbMaxCols, sizeof(float));
fprintf(stderr, "After Rotation:\n");
largerRow = 0;
maxWidth = 0;
for (i = 0; i < NbRows; i++) {
curFace = GF_TAILQ_FIRST(&(Row[i].faces));
while (curFace) {
if (curFace->isPresent) {
branch = curFace->branch->getParent(0);
if (branch->isAKindOf(_SSG_TYPE_BASETRANSFORM)) {
((ssgBaseTransform*)branch)->getTransform(m2);
curFace->align[0] *= m2[3][0];
curFace->align[1] *= m2[3][1];
curFace->align[2] *= m2[3][2];
fprintf(stderr, "Align face %s : %f %f %f\n", curFace->faceName, curFace->align[0], curFace->align[1], curFace->align[2]);
}
sgMakeTransMat4(m, curFace->align);
sgMakeIdentMat4(m2);
for (j = 0; j < 3; j++) {
m2[j][j] = curFace->lscale[j];
}
sgPostMultMat4(m, m2);
sgMakeRotMat4(m2, curFace->xform.hpr);
sgPostMultMat4(m, m2);
sgCopyMat4(curFace->mat, m);
sgXformPnt3(curFace->sbbmin, curFace->lbbmin, m);
sgXformPnt3(curFace->sbbmax, curFace->lbbmax, m);
fprintf(stderr, " Face %s : %f %f %f --- %f %f %f\n",
curFace->faceName, curFace->sbbmin[0], curFace->sbbmin[1], curFace->sbbmin[2],
curFace->sbbmax[0], curFace->sbbmax[1], curFace->sbbmax[2]);
curFace->lwidth = 2.0 * MAX(fabs(curFace->sbbmin[0]), fabs(curFace->sbbmax[0]));
curFace->lheight = 2.0 * MAX(fabs(curFace->sbbmin[2]), fabs(curFace->sbbmax[2]));
//curFace->lwidth = fabs(curFace->sbbmin[0] - curFace->sbbmax[0]);
//curFace->lheight = fabs(curFace->sbbmin[2] - curFace->sbbmax[2]);
Row[i].lwidth += curFace->lwidth;
Row[i].lheight = MAX(Row[i].lheight, curFace->lheight);
}
curFace = GF_TAILQ_NEXT(curFace, link);
}
if (Row[i].lwidth > maxWidth) {
maxWidth = Row[i].lwidth;
largerRow = i;
}
}
height = 0;
fprintf(stderr, "After Scaling:\n");
for (i = 0; i < NbRows; i++) {
height += Row[i].lheight;
}
width = maxWidth;
scale = (float)ImgSize / MAX(width, height);
curFace = GF_TAILQ_FIRST(&(Row[largerRow].faces));
i = 0;
fprintf(stderr, "Columns : ");
while (curFace) {
ColWidth[i] = curFace->lwidth * scale;
fprintf(stderr, "%.2f ", ColWidth[i]);
curFace = GF_TAILQ_NEXT(curFace, link);
i++;
}
fprintf(stderr, "\n");
fprintf(stderr, "Total Width = %.2f Height = %.2f\n", width, height);
fprintf(stderr, "Image Width = %.2f Height = %.2f\n", width*scale, height*scale);
offY = - (float)ImgSize / 2.0;
for (i = 0; i < NbRows; i++) {
curFace = GF_TAILQ_FIRST(&(Row[i].faces));
offY += Row[i].lheight*scale / 2.0;
col = 0;
offX = - (float)ImgSize / 2.0;
while (curFace) {
if (curFace->isPresent) {
sgCopyMat4(m, curFace->mat);
curFace->texScale = scale;
sgMakeIdentMat4(m2);
for (j = 0; j < 3; j++) {
m2[j][j] = scale;
}
sgPostMultMat4(m, m2);
sgXformPnt3(curFace->sbbmin, curFace->lbbmin, m);
sgXformPnt3(curFace->sbbmax, curFace->lbbmax, m);
offX += ColWidth[col] / 2.0;
curFace->offset[0] = offX;
curFace->offset[2] = offY;
offX += ColWidth[col] / 2.0;
sgMakeTransMat4(m2, curFace->offset);
sgPostMultMat4(m, m2);
sgCopyMat4(curFace->mat, m);
curFace->branch->setTransform(m);
} else {
offX += ColWidth[col];
}
col++;
curFace = GF_TAILQ_NEXT(curFace, link);
}
offY += Row[i].lheight*scale / 2.0;
}
}
//
// Update the position of the moon image in the sky
//
void CMoonImage::Reposition (sgVec3 p, double theta, double lst, double lat,
double ra, double dec, double spin)
{
sgMat4 LST, LAT, RA, DEC, D, SCALE, ECLIPTIC, SPIN;
sgVec3 axis;
sgVec3 v;
// Create scaling matrix for moon illusion (appears larger near horizon)
float scale = 1.0f;
sgMakeIdentMat4 (SCALE);
float maxMagnification = 0.5f;
float minThreshold = DegToRad (80.0f);
float maxThreshold = DegToRad (95.0f);
float span = maxThreshold - minThreshold;
if ((theta >= minThreshold) && (theta <= maxThreshold)) {
sgMat4 I;
sgMakeIdentMat4 (I);
scale = 1.0f + (maxMagnification * (theta - minThreshold) / span);
sgScaleMat4 (SCALE, I, scale);
}
// Rotation matrix for latitude
sgSetVec3 (axis, -1.0f, 0, 0);
sgMakeRotMat4 (LAT, 90.0f-(float)lat, axis);
// Rotation matrix for local sidereal time, converted from h to deg
sgSetVec3 (axis, 0, 0, -1.0f);
sgMakeRotMat4 (LST, ((float)lst * 15), axis);
// Rotation matrix for right ascension
sgSetVec3 (axis, 0, 0, 1);
sgMakeRotMat4 (RA, RadToDeg ((float)ra), axis);
// Rotation matrix for declination
sgSetVec3 (axis, 1, 0, 0);
sgMakeRotMat4 (DEC, 90.0f - RadToDeg ((float)dec), axis);
// Translate moon distance
sgSetVec3 (v, 0, 0, distance);
sgMakeTransMat4 (D, v);
// Rotate to align moon equator with ecliptic
sgSetVec3 (axis, 1.0f, 0, 0);
sgMakeRotMat4 (ECLIPTIC, 90.0f, axis);
/// Rotate the moon image accurately towards the sun position
sgSetVec3 (axis, 0, 0, 1);
sgMakeRotMat4 (SPIN, spin, axis);
// Combine all transforms
sgMakeIdentMat4 (T);
sgPreMultMat4 (T, LAT);
sgPreMultMat4 (T, LST);
sgPreMultMat4 (T, RA);
sgPreMultMat4 (T, DEC);
sgPreMultMat4 (T, D);
sgPreMultMat4 (T, ECLIPTIC);
sgPreMultMat4 (T, SPIN);
/*
char debug[256];
double jd = CTimeManager::Instance().GetJulianDate();
SDateTime dt = CTimeManager::Instance().GetLocalDateTime ();
sprintf (debug, "JD=%f D=%d/%d/%d T=%d:%d RA=%f Dec=%f", jd,
dt.date.year, dt.date.month, dt.date.day, dt.time.hour, dt.time.minute,
RadToDeg(ra), RadToDeg(dec));
DrawNoticeToUser (debug, 1);
*/
}
void ssgVtxTableCarlight::draw_geometry ()
{
if (on == 0) {
return;
}
int num_normals = getNumNormals();
float alpha;
GLfloat modelView[16];
sgVec3 A, B, C, D;
sgVec3 right, up;
sgVec3 axis;
sgMat4 mat;
sgMat4 mat3;
sgVec3 *vx = (sgVec3 *) vertices->get(0);
sgVec3 *nm = (sgVec3 *) normals->get(0);
alpha = 0.75f;
glDepthMask(GL_FALSE);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glPolygonOffset(-15.0f, -20.0f);
glEnable(GL_POLYGON_OFFSET_FILL);
// get the matrix.
glGetFloatv(GL_MODELVIEW_MATRIX, modelView);
// get the up and right vector from the matrice view.
up[0] = modelView[1];
up[1] = modelView[5];
up[2] = modelView[9];
right[0] = modelView[0];
right[1] = modelView[4];
right[2] = modelView[8];
// compute the coordinates of the four points of the quadri.
// up and right points
C[0] = right[0] + up[0];
C[1] = right[1] + up[1];
C[2] = right[2] + up[2];
// left and up
D[0] = -right[0] + up[0];
D[1] = -right[1] + up[1];
D[2] = -right[2] + up[2];
// down and left
A[0] = -right[0] - up[0];
A[1] = -right[1] - up[1];
A[2] = -right[2] - up[2];
// right and down
B[0] = right[0] - up[0];
B[1] = right[1] - up[1];
B[2] = right[2] - up[2];
axis[0] = 0;
axis[1] = 0;
axis[2] = 1;
if (grMaxTextureUnits > 1) {
glActiveTextureARB (GL_TEXTURE0_ARB);
}
sgMakeRotMat4(mat, ((float)rand()/(float)RAND_MAX)*45, axis);
glMatrixMode(GL_TEXTURE);
glLoadIdentity ();
sgMakeTransMat4(mat3, 0.5, 0.5, 0);
glMultMatrixf((float *)mat3);
glMultMatrixf((float *)mat);
sgMakeTransMat4(mat3, -0.5, -0.5, 0);
glMultMatrixf((float *)mat3);
glMatrixMode(GL_MODELVIEW);
for (int I = 0; I < on; I++)
{
glBegin(gltype) ;
glColor4f(0.8, 0.8, 0.8, alpha);
if (num_normals == 1) {
glNormal3fv(nm[0]);
}
// the computed coordinates are translated from the smoke position with the x,y,z speed.
glTexCoord2f(0, 0);
glVertex3f(vx[0][0] + factor*size*A[0], vx[0][1] + factor*size*A[1], vx[0][2] + factor*size*A[2]);
glTexCoord2f(0, 1);
glVertex3f(vx[0][0] + factor*size*B[0], vx[0][1] + factor*size*B[1], vx[0][2] + factor*size*B[2]);
glTexCoord2f(1, 0);
glVertex3f(vx[0][0] + factor*size*D[0], vx[0][1] + factor*size*D[1], vx[0][2] + factor*size*D[2]);
glTexCoord2f(1, 1);
glVertex3f(vx[0][0]+factor*size*C[0],vx[0][1]+factor*size*C[1], vx[0][2]+factor*size*C[2]);
glEnd();
}
glDisable(GL_POLYGON_OFFSET_FILL);
if (grMaxTextureUnits > 1) {
glActiveTextureARB (GL_TEXTURE0_ARB);
}
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glDepthMask(GL_TRUE);
}
