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;
}
void IceFloe::build( int nsrcpnt, sgVec2 *srcpnt ) {
sgVec2 c;
sgSetVec2( c, 0.0, 0.0 );
int n=0,i;
// find the centeroid
for ( i = 0; i < nsrcpnt; i++) {
c[0] += srcpnt[i][0];
c[1] += srcpnt[i][1];
n++;
}
if (n>0.00001) {
c[0] /= n;
c[1] /= n;
}
// make the points local
pnts = new sgVec3[ nsrcpnt ];
npnts = nsrcpnt;
for ( i=0; i < nsrcpnt; i++) {
sgSetVec3( pnts[i], srcpnt[i][0] - c[0], 0.0,
srcpnt[i][1] - c[1] );
}
// set location
sgSetVec3( pos, c[0], 0.0, c[1] );
}
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;
}
TransIcelandicExpress::TransIcelandicExpress() {
// constructor
music = NULL;
angle = 0.0;
dot_init = false;
sgSetVec3( cameraPos, 0.0f, 0.013f, -0.2f );
sgSetVec4( light_pos, -1.0f, -1.0f, -1.0f, 0.0f );
sgSetVec4( light_amb, 0.2f, 0.2f, 0.3f, 1.0f );
sgSetVec4( light_diff, 1.0f, 1.0f, 0.8f, 1.0f );
sgSetVec4( light_spec, 1.0f, 1.0f, 1.0f, 1.0f );
sgSetVec4( ocean_diff, 0.4f, 0.5f, 0.7f, 1.0f );
player = new Player();
showHelp = true;
roadX = 0;
roadY = 0;
loadLevel( "./gamedata/levels/tess2.txt" );
//loadLevel( "./gamedata/levels/SimpleRoad.txt" );
//loadLevel( "./gamedata/levels/Challenge2.txt" );
}
//
// 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);
}
void CRRCControlSurfaceAnimation::transformPoint(CRRCMath::Vector3& point)
{
sgVec3 pnt_sg;
sgSetVec3(pnt_sg, (float)point.r[0], (float)point.r[1], (float)point.r[2]);
sgXformVec3(pnt_sg, current_transformation);
point.r[0] = pnt_sg[SG_X];
point.r[1] = pnt_sg[SG_Y];
point.r[2] = pnt_sg[SG_Z];
}
/** \brief Create a rotation matrix
*
* This function creates a rotation matrix from the original
* OpenGL glRotatef commands in CRRCAirplaneLaRCSim::draw().
*
* \param m The matrix to be rotated
* \param phi Euler angle phi
* \param theta Euler angle theta
* \param psi Euler angle psi
*/
inline void makeOGLRotMat4(sgMat4 m, double phi, double theta, double psi)
{
sgMat4 temp;
sgVec3 rvec;
//~ sgSetVec3(rvec, 0.0, 1.0, 0.0);
//~ sgMakeRotMat4(temp, 90.0, rvec);
//~ sgPreMultMat4(m, temp);
sgSetVec3(rvec, 0.0, 1.0, 0.0);
sgMakeRotMat4(temp, 180.0f - (float)psi * SG_RADIANS_TO_DEGREES, rvec);
sgPreMultMat4(m, temp);
sgSetVec3(rvec, -1.0, 0.0, 0.0);
sgMakeRotMat4(temp, (float)theta * SG_RADIANS_TO_DEGREES, rvec);
sgPreMultMat4(m, temp);
sgSetVec3(rvec, 0.0, 0.0, 1.0);
sgMakeRotMat4(temp, (float)phi * SG_RADIANS_TO_DEGREES, rvec);
sgPreMultMat4(m, temp);
}
void TransIcelandicExpress::mouseMotion( int xrel, int yrel ) {
// rotate the camera
sgVec3 axis, oldCamPos;
sgMat4 m;
float rot_factor = 0.5;
// change heading
sgSetVec3( axis, 0.0, 1.0, 0.0 );
sgMakeRotMat4( m, (float)xrel * rot_factor, axis ) ;
sgXformVec3( cameraPos, m ) ;
// change pitch
sgSetVec3( axis, 1.0, 0.0, 0.0 );
sgMakeRotMat4( m, (float)yrel * rot_factor, axis ) ;
sgCopyVec3( oldCamPos, cameraPos );
sgXformVec3( cameraPos, m ) ;
// don't let the camera go below player
if (cameraPos[1] < 0.0 ) {
sgCopyVec3( cameraPos, oldCamPos );
}
}
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();
}
void
cGrCloudLayer::build( ssgSimpleState *cloud_state, float span, float elevation, float thickness, float transition )
{
layer_span = span;
layer_asl = elevation;
layer_thickness = thickness;
layer_transition = transition;
scale = 4000.0;
last_lon = last_lat = -999.0f;
last_x = last_y = 0.0f;
sgVec2 base;
sgSetVec2( base, (float)grRandom(), (float)grRandom() );
// build the cloud layer
sgVec4 color;
sgVec3 vertex;
sgVec2 tc;
const float layer_scale = layer_span / scale;
const float mpi = SG_PI/4;
const float alt_diff = layer_asl * 1.5f;
for (int i = 0; i < 4; i++)
{
if ( layer[i] != NULL )
{
layer_transform->removeKid(layer[i]); // automatic delete
}
vl[i] = new ssgVertexArray( 10 );
cl[i] = new ssgColourArray( 10 );
tl[i] = new ssgTexCoordArray( 10 );
sgSetVec3( vertex, layer_span*(i-2)/2, -layer_span,
(float)(alt_diff * (sin(i*mpi) - 2)) );
sgSetVec2( tc, base[0] + layer_scale * i/4, base[1] );
sgSetVec4( color, 1.0f, 1.0f, 1.0f, (i == 0) ? 0.0f : 0.15f );
cl[i]->add( color );
vl[i]->add( vertex );
tl[i]->add( tc );
for (int j = 0; j < 4; j++)
{
sgSetVec3( vertex, layer_span*(i-1)/2, layer_span*(j-2)/2,
(float)(alt_diff * (sin((i+1)*mpi) + sin(j*mpi) - 2)) );
sgSetVec2( tc, base[0] + layer_scale * (i+1)/4,
base[1] + layer_scale * j/4 );
sgSetVec4( color, 1.0f, 1.0f, 1.0f,
( (j == 0) || (i == 3)) ?
( (j == 0) && (i == 3)) ? 0.0f : 0.15f : 1.0f );
cl[i]->add( color );
vl[i]->add( vertex );
tl[i]->add( tc );
sgSetVec3( vertex, layer_span*(i-2)/2, layer_span*(j-1)/2,
(float)(alt_diff * (sin(i*mpi) + sin((j+1)*mpi) - 2)) );
sgSetVec2( tc, base[0] + layer_scale * i/4,
base[1] + layer_scale * (j+1)/4 );
sgSetVec4( color, 1.0f, 1.0f, 1.0f,
((j == 3) || (i == 0)) ?
((j == 3) && (i == 0)) ? 0.0f : 0.15f : 1.0f );
cl[i]->add( color );
vl[i]->add( vertex );
tl[i]->add( tc );
}
sgSetVec3( vertex, layer_span*(i-1)/2, layer_span,
(float)(alt_diff * (sin((i+1)*mpi) - 2)) );
sgSetVec2( tc, base[0] + layer_scale * (i+1)/4,
base[1] + layer_scale );
sgSetVec4( color, 1.0f, 1.0f, 1.0f, (i == 3) ? 0.0f : 0.15f );
cl[i]->add( color );
vl[i]->add( vertex );
tl[i]->add( tc );
layer[i] = new ssgVtxTable(GL_TRIANGLE_STRIP, vl[i], NULL, tl[i], cl[i]);
layer_transform->addKid( layer[i] );
layer[i]->setState( cloud_state );
}
// force a repaint of the sky colors with arbitrary defaults
repaint( color );
}
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;
}
/** \brief The per-frame OpenGL display routine
*
* This function does the complete OpenGL drawing. First
* the 3D scene is drawn, then some 2D overlays
* (wind and battery indicator, GUI).
*/
void display()
{
CRRCMath::Vector3 plane_pos = FDM2Graphics(Global::aircraft->getPos());
// Prepare the current frame buffer and reset
// the modelview matrix (for non-SSG drawing)
GLbitfield clearmask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
if (vidbits.stencil)
{
clearmask |= GL_STENCIL_BUFFER_BIT;
}
glClear(clearmask);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glPushMatrix();
//~ glBlendFunc(GL_ONE, GL_ZERO);
//~ glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
// Set up the viewing transformation (for SSG drawing)
sgVec3 viewpos, planepos, up;
sgSetVec3(viewpos, player_pos.r[0], player_pos.r[1], player_pos.r[2]);
sgSetVec3(planepos, looking_pos.r[0], looking_pos.r[1], looking_pos.r[2]);
sgSetVec3(up, 0.0, 1.0, 0.0);
context->setCameraLookAt(viewpos, planepos, up);
// 3D scene
if( Global::scenery != NULL)
{
// 3D scene: sky sphere
draw_sky(&viewpos, Global::Simulation->getTotalTime());
// 3D scene: airplane
if (Global::aircraft->getModel() != NULL)
{
// For SSG rendering, this call does not draw anything,
// but calculates the airplane's transformation matrix
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
Global::aircraft->getModel()->draw(Global::aircraft->getFDM());
}
// 3D scene: scenery
Global::scenery->draw(Global::Simulation->getTotalTime());
}
// Lighting setup. Only needed as long as there are
// non-SSG parts that modify the light sources.
sgVec4 lightamb;
sgSetVec4(lightamb , 0.2f, 0.2f, 0.2f, 1.0f);
ssgGetLight(0)->setPosition(lightposn);
ssgGetLight(0)->setColour(GL_AMBIENT, lightamb);
// Draw the scenegraph (airplane model, shadow)
ssgCullAndDraw(scene);
context->forceBasicState();
// ssgCullAndDraw() ends up with an identity modelview matrix,
// so we have to set up our own viewing transformation for
// the thermals
glLoadIdentity();
gluLookAt(player_pos.r[0], player_pos.r[1], player_pos.r[2],
looking_pos.r[0], looking_pos.r[1], looking_pos.r[2],
0.0, 1.0, 0.0);
if (Global::training_mode==TRUE)
{
draw_thermals(Global::aircraft->getPos());
}
// 3D scene: game-mode-specific stuff (pylons etc.)
Global::gameHandler->draw();
glPopMatrix();
// Overlay: game handler
Global::gameHandler->display_infos(window_xsize, window_ysize);
// Overlay: scope for audio interface
if ( Global::testmode.test_mode
&&
(Global::TXInterface->inputMethod() == T_TX_Interface::eIM_audio) )
{
GlOverlay::setupRenderingState(window_xsize, window_ysize);
oscillo();
GlOverlay::restoreRenderingState();
}
// Overlay: wind direction indicator
{
double dx = (plane_pos.r[2] - player_pos.r[2]);
double dy = (player_pos.r[0] - plane_pos.r[0]);
double dir = atan2(dy, dx);
GlOverlay::setupRenderingState(window_xsize, window_ysize);
draw_wind(dir);
GlOverlay::restoreRenderingState();
}
// Overlay: battery capacity/fuel left
{
int r = window_ysize >> 5;
int w = r >> 1;
int h = window_ysize >> 3;
int ht = (int)(Global::aircraft->getFDM()->getBatCapLeft() * h);
#if 0
glDisable(GL_LIGHTING);
glMatrixMode (GL_PROJECTION);
glPushMatrix();
glLoadIdentity ();
gluOrtho2D (0, window_xsize-1, 0, window_ysize);
#endif
GlOverlay::setupRenderingState(window_xsize, window_ysize);
// Background
glColor3f (0, 0, 0);
glRectf(window_xsize-w, r+ht,
window_xsize-1, r+h);
glTranslatef(0,0,0.1);
// Indicator
glColor3f (0, 1, 0.);
glRectf(window_xsize-w, r,
window_xsize-1, r+ht);
#if 0
glPopMatrix();
glEnable(GL_LIGHTING);
glMatrixMode(GL_MODELVIEW);
#endif
GlOverlay::restoreRenderingState();
}
// Overlay: console
console->render(window_xsize, window_ysize);
// Overlay: gui
Global::gui->draw();
// check for any OpenGL errors
evaluateOpenGLErrors();
// Force pipeline flushing and flip front and back buffer
glFlush();
SDL_GL_SwapBuffers();
}
// initialize the sky object and connect it into our scene graph
ssgBranch * cGrSkyDome::build( double hscale, double vscale )
{
sgVec4 color;
double theta;
int i;
// clean-up previous
ssgDeRefDelete( dome_transform );
// create new
dome_transform = new ssgTransform;
dome_transform->ref();
// set up the state
dome_state = new ssgSimpleState();
dome_state->setShadeModel( GL_SMOOTH );
dome_state->disable( GL_LIGHTING );
dome_state->disable( GL_CULL_FACE );
dome_state->disable( GL_TEXTURE_2D );
dome_state->enable( GL_COLOR_MATERIAL );
dome_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
dome_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
dome_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
dome_state->disable( GL_BLEND );
dome_state->disable( GL_ALPHA_TEST );
// initialize arrays
center_disk_vl = new ssgVertexArray( 14 );
center_disk_cl = new ssgColourArray( 14 );
upper_ring_vl = new ssgVertexArray( 26 );
upper_ring_cl = new ssgColourArray( 26 );
middle_ring_vl = new ssgVertexArray( 26 );
middle_ring_cl = new ssgColourArray( 26 );
lower_ring_vl = new ssgVertexArray( 26 );
lower_ring_cl = new ssgColourArray( 26 );
// initially seed to all blue
sgSetVec4( color, 0.0, 0.0, 1.0, 1.0 );
// generate the raw vertex data
sgVec3 center_vertex;
sgVec3 upper_vertex[12];
sgVec3 middle_vertex[12];
sgVec3 lower_vertex[12];
sgVec3 bottom_vertex[12];
sgSetVec3( center_vertex, 0.0, 0.0, (float)(center_elev * vscale));
for ( i = 0; i < 12; i++ )
{
theta = (i * 30.0) * SGD_DEGREES_TO_RADIANS;
sgSetVec3( upper_vertex[i],
(float)(cos(theta) * upper_radius * hscale),
(float)(sin(theta) * upper_radius * hscale),
(float)(upper_elev * vscale));
sgSetVec3( middle_vertex[i],
(float)(cos(theta) * middle_radius * hscale),
(float)(sin(theta) * middle_radius * hscale),
(float)(middle_elev * vscale));
sgSetVec3( lower_vertex[i],
(float)(cos(theta) * lower_radius * hscale),
(float)(sin(theta) * lower_radius * hscale),
(float)(lower_elev * vscale));
sgSetVec3( bottom_vertex[i],
(float)(cos(theta) * bottom_radius * hscale),
(float)(sin(theta) * bottom_radius * hscale),
(float)(bottom_elev * vscale));
}
// generate the center disk vertex/color arrays
center_disk_vl->add( center_vertex );
center_disk_cl->add( color );
for ( i = 11; i >= 0; i-- )
{
center_disk_vl->add( upper_vertex[i] );
center_disk_cl->add( color );
}
center_disk_vl->add( upper_vertex[11] );
center_disk_cl->add( color );
// generate the upper ring
for ( i = 0; i < 12; i++ )
{
upper_ring_vl->add( middle_vertex[i] );
upper_ring_cl->add( color );
upper_ring_vl->add( upper_vertex[i] );
upper_ring_cl->add( color );
}
upper_ring_vl->add( middle_vertex[0] );
upper_ring_cl->add( color );
upper_ring_vl->add( upper_vertex[0] );
upper_ring_cl->add( color );
// generate middle ring
for ( i = 0; i < 12; i++ )
{
middle_ring_vl->add( lower_vertex[i] );
middle_ring_cl->add( color );
middle_ring_vl->add( middle_vertex[i] );
middle_ring_cl->add( color );
}
middle_ring_vl->add( lower_vertex[0] );
middle_ring_cl->add( color );
middle_ring_vl->add( middle_vertex[0] );
middle_ring_cl->add( color );
// generate lower ring
for ( i = 0; i < 12; i++ )
{
lower_ring_vl->add( bottom_vertex[i] );
lower_ring_cl->add( color );
lower_ring_vl->add( lower_vertex[i] );
lower_ring_cl->add( color );
}
lower_ring_vl->add( bottom_vertex[0] );
lower_ring_cl->add( color );
lower_ring_vl->add( lower_vertex[0] );
lower_ring_cl->add( color );
// force a repaint of the sky colors with ugly defaults
sgVec3 fog_color;
sgSetVec3( fog_color, 1.0, 1.0, 1.0 );
repaint( color, fog_color, 0.0, 5000.0 );
// build the ssg scene graph sub tree for the sky and connected
// into the provide scene graph branch
ssgVtxTable *center_disk, *upper_ring, *middle_ring, *lower_ring;
center_disk = new ssgVtxTable( GL_TRIANGLE_FAN,
center_disk_vl, NULL, NULL, center_disk_cl );
upper_ring = new ssgVtxTable( GL_TRIANGLE_STRIP,
upper_ring_vl, NULL, NULL, upper_ring_cl );
middle_ring = new ssgVtxTable( GL_TRIANGLE_STRIP,
middle_ring_vl, NULL, NULL, middle_ring_cl );
lower_ring = new ssgVtxTable( GL_TRIANGLE_STRIP,
lower_ring_vl, NULL, NULL, lower_ring_cl );
center_disk->setState( dome_state );
upper_ring->setState( dome_state );
middle_ring->setState( dome_state );
lower_ring->setState( dome_state );
dome_transform->addKid( center_disk );
dome_transform->addKid( upper_ring );
dome_transform->addKid( middle_ring );
dome_transform->addKid( lower_ring );
// not entirely satisfying. We are depending here that the first
// thing we add to a parent is the first drawn
center_disk->setCallback( SSG_CALLBACK_PREDRAW, grSkyDomePreDraw );
center_disk->setCallback( SSG_CALLBACK_POSTDRAW, grSkyDomePostDraw );
upper_ring->setCallback( SSG_CALLBACK_PREDRAW, grSkyDomePreDraw );
upper_ring->setCallback( SSG_CALLBACK_POSTDRAW, grSkyDomePostDraw );
middle_ring->setCallback( SSG_CALLBACK_PREDRAW, grSkyDomePreDraw );
middle_ring->setCallback( SSG_CALLBACK_POSTDRAW, grSkyDomePostDraw );
lower_ring->setCallback( SSG_CALLBACK_PREDRAW, grSkyDomePreDraw );
lower_ring->setCallback( SSG_CALLBACK_POSTDRAW, grSkyDomePostDraw );
return dome_transform;
}
//--------------------------------------------------------------------
Player::Player() : SceneObject() {
sgSetVec3( vel, 0.0, 0.0, 0.0 );
}
/*void CSkyManager::GetSkyDomeColour (float theta, float phi, float &r, float &g, float &b)
{
// Set default fog colour
// r = g = b = 0.0f;
if (domeimage != NULL) domeimage->GetDomeColour (theta, phi, r, g, b);
}
*/
void CSkyManager::PreDraw (void)
{
SPosition eyePos = globals->geop;
double mjd = globals->tim->GetModifiedJulianDate ();
double lst = globals->tim->GetLocalSiderealTime(eyePos.lon);
// Convert camera eye position to cartesian coordinates
SVector v;
v = GeodToCartesian (eyePos);
sgVec3 p;
sgSetVec3 (p, (float)v.x, (float)v.y, (float)v.z);
// Convert latitude and longitude to degrees for sky object repositioning
double lat = eyePos.lat / 3600;
double lon = eyePos.lon / 3600;
/// \todo Sun/moon positions only need to be recalculated infrequently, not
/// on every update cycle
// Update ephemeris calculations for sun. This needs to be done first since
// the sun elevation is needed to update the other celestial objects
sol->UpdatePosition (mjd);
// Update ephemeris calculations for other celestial objects
moon->UpdatePosition (mjd, lst, lat, sol);
/// \todo Planet positions only need to be calculated once at situation start
mercury->UpdatePosition (mjd, sol);
venus->UpdatePosition (mjd, sol);
mars->UpdatePosition (mjd, sol);
jupiter->UpdatePosition (mjd, sol);
saturn->UpdatePosition (mjd, sol);
// Get solar zenith and azimuth angles
calc_zenith_azimuth_angles (sol->GetRightAscension(), sol->GetDeclination(),
lat, lon,
&solTheta, &solPhi);
double moonTheta, moonPhi;
calc_zenith_azimuth_angles (moon->GetRightAscension(), moon->GetDeclination(),
lat, lon,
&moonTheta, &moonPhi);
// Update sky lighting model
skylight->Update (solTheta, solPhi, moonTheta, moonPhi);
// DEBUG
// char debug[80];
// sprintf (debug, "solTheta=%7.3f deg, solPhi=%7.3f deg",
// RadToDeg (solTheta), RadToDeg (solPhi));
// DrawNoticeToUser (debug, 1);
// Update appearance and position of sky dome
domeimage->Repaint (solTheta, solPhi);
// Update appearance and position of Sol
// solimage->Repaint (solTheta);
// solimage->Reposition (p, lst, lat,
// sol->GetRightAscension(), sol->GetDeclination(),
// skyDistance);
// Update appearance and position of the Moon
/// \todo Orient moon towards sun using the 'spin' parameter
moonimage->Repaint (moonTheta, moon->GetAge ());
moonimage->Reposition (p, moonTheta, lst, lat,
moon->GetRightAscension(), moon->GetDeclination(), 0);
// Determine limiting magnitude and ambient light factor for night sky objects
float limit, factor;
float limitLastUpdate = 10.0;
// EDarkPhase phase = limitingMagnitude (solTheta, &limit, &factor);
limitingMagnitude (solTheta, &limit, &factor);
// If the limiting magnitude has changed by more than the preset value, repaint
// the stars and planets
// if (phase != old_phase) {
if (fabs (limitLastUpdate - limit) > 0.1) {
limitLastUpdate = limit;
// Update appearance for all planets and stars
mercuryimage->Repaint ((float)mercury->GetMagnitude (), limit, factor);
venusimage->Repaint ((float)venus->GetMagnitude(), limit, factor);
marsimage->Repaint ((float)mars->GetMagnitude(), limit, factor);
jupiterimage->Repaint ((float)jupiter->GetMagnitude(), limit, factor);
saturnimage->Repaint ((float)saturn->GetMagnitude(), limit, factor);
starimage->Repaint (limit, factor);
}
// Update positions of all planets
mercuryimage->Reposition (p, lst, lat,
mercury->GetRightAscension(), mercury->GetDeclination(),
skyDistance);
venusimage->Reposition (p, lst, lat,
venus->GetRightAscension(), venus->GetDeclination(),
skyDistance);
marsimage->Reposition (p, lst, lat,
mars->GetRightAscension(), mars->GetDeclination(),
skyDistance);
jupiterimage->Reposition (p, lst, lat,
jupiter->GetRightAscension(), jupiter->GetDeclination(),
skyDistance);
saturnimage->Reposition (p, lst, lat,
saturn->GetRightAscension(), saturn->GetDeclination(),
skyDistance);
// Update positions of stars
starimage->Reposition (p, lon, lat, lst);
// Depth testing is disabled for all sky elements, therefore they must be drawn
// from "farthest" to "nearest"
glPushAttrib (GL_DEPTH_BUFFER_BIT);
glDisable (GL_DEPTH_TEST);
// Draw sky sub-components
domeimage->Draw ();
starimage->Draw ();
saturnimage->Draw ();
jupiterimage->Draw ();
marsimage->Draw ();
venusimage->Draw ();
mercuryimage->Draw ();
// Sun and moon images temporarily left undrawn
//solimage->Draw ();
moonimage->Draw ();
glPopAttrib ();
}
SceneObject::SceneObject() {
sgSetVec3( pos, 0.0, 0.0, 0.0 );
sgSetVec3( hpr, 0.0, 0.0, 0.0 );
sgSetVec4( dbgDiffColor, 1.0, 0.5, 0.5, 1.0 );
}
void TransIcelandicExpress::simulate() {
sgVec3 fwd, right, up, frict, v;
sgVec3 playerForce;
float cf_accel = 1.0, // m/s^2
maxVel = 0.5, // m/2
cf_friction_land = 8.0,
cf_friction_ice = 5.0;
float pv,
ff; // friction fudge... more friction for slow objects
float timestep = 0.01f;
static float timeleft = 0.0f;
timeleft += deltaT;
sgSetVec3( up, 0.0, 1.0, 0.0 );
sgSetVec3( playerForce, 0.0, 0.0, 0.0 );
while (timeleft > timestep) {
sgCopyVec3( fwd, cameraPos );
sgNegateVec3( fwd );
fwd[1] = 0.0;
sgNormalizeVec3( fwd );
sgVectorProductVec3( right, fwd, up );
// todo: if on the ground
sgScaleVec3( fwd, cf_moveForward );
sgAddVec3( playerForce, fwd );
sgScaleVec3( right, cf_moveSideways );
sgAddVec3( playerForce, right );
sgScaleVec3( playerForce, cf_accel * timestep );
sgAddVec3( player->vel, playerForce );
pv = sgLengthVec3( player->vel ) ;
ff = (1.0 - ((pv / maxVel)* 0.8));
ff = ff*ff;
sgCopyVec3( frict, player->vel );
sgNegateVec3( frict );
sgScaleVec3( frict, ff * cf_friction_ice * timestep );
sgAddVec3( player->vel, frict );
dbgVel.push_back( pv );
if (dbgVel.size() > 100 ) {
dbgVel.pop_front();
}
if ( pv > maxVel ) {
//printf("maxvel!\n" );
sgNormalizeVec3( player->vel );
sgScaleVec3( player->vel, maxVel );
}
sgCopyVec3( v, player->vel );
sgScaleVec3( v, timestep );
sgAddVec3( player->pos, v );
// advance
timeleft -= timestep;
}
player->pos[1] = getHeight( player->pos );
}
void TransIcelandicExpress::loadLevel( const char *filename ) {
FILE *fp = fopen( filename, "r" );
char line[1000], cmd[100], type[100];
IceFloe *floe;
sgVec2 *pnt;
float x, y;
int num, npnt, i, j;
// clear any floes
for (std::vector<IceFloe*>::iterator floei=floes.begin();
floei != floes.end(); floei++ ) {
delete *floei;
}
floes.erase( floes.begin(), floes.end() );
while (fgets( line, 1000, fp )) {
if (line[0]=='#') continue;
sscanf( line, "%s", cmd );
if (!strcmp(cmd, "location")) {
sscanf( line, "%*s %f %f %s\n", &x, &y, type );
if (!strcmp( type, "StartPos" )) {
sgSetVec3( player->pos, x, 0.05f, y );
player->pos[1] = getHeight( player->pos );
} else if (!strcmp( type, "Sheep" )) {
SceneObject *shp;
shp = new SceneObject();
sgSetVec3( shp->pos, x, 0.05f, y );
shp->pos[1] = getHeight( shp->pos );
sgSetVec4( shp->dbgDiffColor, 0.8f, 0.8f, 0.8f, 1.0f );
sheep.push_back( shp );
} else if (!strcmp( type, "Crate" )) {
SceneObject *crt;
crt = new SceneObject();
sgSetVec3( crt->pos, x, 0.05f, y );
crt->pos[1] = getHeight( crt->pos );
sgSetVec4( crt->dbgDiffColor, 1.0f, 0.9f, 0.4f, 1.0f );
crates.push_back( crt );
}
} else if (!strcmp(cmd, "mapsize")) {
// delete the old map if present
for (j = 0; j < roadY; j++) {
for (i = 0; i < roadX; i++) {
delete road[i][j];
road[i][j] = NULL;
}
}
sscanf( line, "%*s %d %d", &roadX, &roadY );
// make a new map
for (j = 0; j < roadY; j++) {
for (i = 0; i < roadX; i++) {
road[i][j] = new Road();
}
}
} else if (!strcmp(cmd, "road_tiles")) {
int pylon, roadway;
sscanf( line, "%*s %d", &num );
for (int n = 0; n < num; n++ ) {
fgets( line, 1000, fp );
sscanf( line, "%s %d %d %d %d", cmd, &i, &j, &roadway, &pylon );
if (strcmp(cmd, "road")) {
printf( "Error: Expecting 'road' got %s\n", line );
} else {
road[i][j]->pylon = pylon;
road[i][j]->road = roadway;
road[i][j]->base_height = c_RoadLevel * 0.5;
sgSetVec3( road[i][j]->pos, float(i) + 0.5f, 0.0f, float(j) + 0.5f);
}
}
} else if (!strcmp(cmd, "num_floes")) {
sscanf( line, "%*s %d", &num );
for (i = 0; i < num; i++) {
fgets( line, 1000, fp );
floe = new IceFloe();
sscanf( line, "%s %f %f %d %d %s %d",
cmd, &(floe->health), &(floe->height),
&(floe->breakable), &(floe->anchored),
type, &npnt );
pnt = new sgVec2[ npnt ];
for ( j = 0; j < npnt; j++ ) {
fgets( line, 1000, fp );
sscanf( line, "%f %f", &x, &y );
pnt[j][0] = x;
pnt[j][1] = y;
}
floe->build( npnt, pnt );
delete [] pnt;
floes.push_back( floe );
}
} else {
printf ("Skipping command %s \n", cmd );
}
}
}
bool cGrSkyDome::repaint( sgVec4 sky_color, sgVec4 fog_color, double sol_angle, double vis )
{
double diff, prev_sun_angle = 999.0;
sgVec3 outer_param, outer_amt, outer_diff;
sgVec3 middle_param, middle_amt, middle_diff;
int i, j;
if (prev_sun_angle == sol_angle)
return true;
prev_sun_angle = sol_angle;
//sol_angle *= SGD_RADIANS_TO_DEGREES;
// Check for sunrise/sunset condition
if ((sol_angle > 80.0))
{
sgSetVec3( outer_param,
(float)((10.0 - fabs(90.0 - sol_angle)) / 20.0),
(float)((10.0 - fabs(90.0 - sol_angle)) / 40.0),
(float)(-(10.0 - fabs(90.0 - sol_angle)) / 30.0));
sgSetVec3( middle_param,
(float)((10.0 - fabs(90.0 - sol_angle)) / 40.0),
(float)((10.0 - fabs(90.0 - sol_angle)) / 80.0),
0.0 );
sgScaleVec3( outer_diff, outer_param, 1.0f / 6.0f );
sgScaleVec3( middle_diff, middle_param, 1.0f / 6.0f );
}
else
{
sgSetVec3( outer_param, 0.0, 0.0, 0.0 );
sgSetVec3( middle_param, 0.0, 0.0, 0.0 );
sgSetVec3( outer_diff, 0.0, 0.0, 0.0 );
sgSetVec3( middle_diff, 0.0, 0.0, 0.0 );
}
// calculate transition colors between sky and fog
sgCopyVec3( outer_amt, outer_param );
sgCopyVec3( middle_amt, middle_param );
//
// First, recalulate the basic colors
//
sgVec4 center_color;
sgVec4 upper_color[12];
sgVec4 middle_color[12];
sgVec4 lower_color[12];
sgVec4 bottom_color[12];
double vis_factor, cvf = vis;
if (cvf > 45000)
cvf = 45000;
vis_factor = (vis - 1000.0) / 2000.0;
if ( vis_factor < 0.0 )
{
vis_factor = 0.0;
} else if ( vis_factor > 1.0)
{
vis_factor = 1.0;
}
for ( j = 0; j < 3; j++ )
{
diff = sky_color[j] - fog_color[j];
center_color[j] = sky_color[j]; // - (float)(diff * ( 1.0 - vis_factor ));
}
for ( i = 0; i < 6; i++ )
{
for ( j = 0; j < 3; j++ )
{
double saif = sol_angle/SG_PI;
diff = sky_color[j] - fog_color[j] * (0.8 + j * 0.2) * (0.8 + saif - ((6-i)/10));
upper_color[i][j] = sky_color[j] - (float)(diff * ( 1.0 - vis_factor * (0.7 + 0.3 * cvf/45000)));
middle_color[i][j] = sky_color[j] - (float)(diff * ( 1.0 - vis_factor * (0.1 + 0.85 * cvf/45000)))
+ middle_amt[j];
lower_color[i][j] = fog_color[j] + outer_amt[j];
if ( upper_color[i][j] > 1.0 ) { upper_color[i][j] = 1.0; }
if ( upper_color[i][j] < 0.0 ) { upper_color[i][j] = 0.0; }
if ( middle_color[i][j] > 1.0 ) { middle_color[i][j] = 1.0; }
if ( middle_color[i][j] < 0.0 ) { middle_color[i][j] = 0.0; }
if ( lower_color[i][j] > 1.0 ) { lower_color[i][j] = 1.0; }
if ( lower_color[i][j] < 0.0 ) { lower_color[i][j] = 0.0; }
}
upper_color[i][3] = middle_color[i][3] = lower_color[i][3] = 1.0;
for ( j = 0; j < 3; j++ )
{
outer_amt[j] -= outer_diff[j];
middle_amt[j] -= middle_diff[j];
}
}
sgSetVec3( outer_amt, 0.0, 0.0, 0.0 );
sgSetVec3( middle_amt, 0.0, 0.0, 0.0 );
for ( i = 6; i < 12; i++ )
{
for ( j = 0; j < 3; j++ )
{
double saif = sol_angle/SG_PI;
diff = (sky_color[j] - fog_color[j]) * (0.8 + j * 0.2) * (0.8 + saif - ((-i+12)/10));
upper_color[i][j] = sky_color[j] - (float)(diff *
( 1.0 - vis_factor * (0.7 + 0.3 * cvf/45000)));
middle_color[i][j] = sky_color[j] - (float)(diff *
( 1.0 - vis_factor * (0.1 + 0.85 * cvf/45000)))
+ middle_amt[j];
lower_color[i][j] = fog_color[j] + outer_amt[j];
if ( upper_color[i][j] > 1.0 ) { upper_color[i][j] = 1.0; }
if ( upper_color[i][j] < 0.0 ) { upper_color[i][j] = 0.0; }
if ( middle_color[i][j] > 1.0 ) { middle_color[i][j] = 1.0; }
if ( middle_color[i][j] < 0.0 ) { middle_color[i][j] = 0.0; }
if ( lower_color[i][j] > 1.0 ) { lower_color[i][j] = 1.0; }
if ( lower_color[i][j] < 0.0 ) { lower_color[i][j] = 0.0; }
}
upper_color[i][3] = middle_color[i][3] = lower_color[i][3] = 1.0;
for ( j = 0; j < 3; j++ )
{
outer_amt[j] += outer_diff[j];
middle_amt[j] += middle_diff[j];
}
}
fade_to_black( (sgVec4 *) center_color, asl * center_elev, 1);
fade_to_black( upper_color, (asl+0.05f) * upper_elev, 12);
fade_to_black( middle_color, (asl+0.05f) * middle_elev, 12);
fade_to_black( lower_color, (asl+0.05f) * lower_elev, 12);
for ( i = 0; i < 12; i++ )
{
sgCopyVec4( bottom_color[i], fog_color );
}
//
// Second, assign the basic colors to the object color arrays
//
float *slot;
int counter;
// update the center disk color arrays
counter = 0;
slot = center_disk_cl->get( counter++ );
// sgVec4 red;
// sgSetVec4( red, 1.0, 0.0, 0.0, 1.0 );
sgCopyVec4( slot, center_color );
for ( i = 11; i >= 0; i-- )
{
slot = center_disk_cl->get( counter++ );
sgCopyVec4( slot, upper_color[i] );
}
slot = center_disk_cl->get( counter++ );
sgCopyVec4( slot, upper_color[11] );
// generate the upper ring
counter = 0;
for ( i = 0; i < 12; i++ )
{
slot = upper_ring_cl->get( counter++ );
sgCopyVec4( slot, middle_color[i] );
slot = upper_ring_cl->get( counter++ );
sgCopyVec4( slot, upper_color[i] );
}
slot = upper_ring_cl->get( counter++ );
sgCopyVec4( slot, middle_color[0] );
slot = upper_ring_cl->get( counter++ );
sgCopyVec4( slot, upper_color[0] );
// generate middle ring
counter = 0;
for ( i = 0; i < 12; i++ )
{
slot = middle_ring_cl->get( counter++ );
sgCopyVec4( slot, lower_color[i] );
slot = middle_ring_cl->get( counter++ );
sgCopyVec4( slot, middle_color[i] );
}
slot = middle_ring_cl->get( counter++ );
sgCopyVec4( slot, lower_color[0] );
slot = middle_ring_cl->get( counter++ );
sgCopyVec4( slot, middle_color[0] );
// generate lower ring
counter = 0;
for ( i = 0; i < 12; i++ )
{
slot = lower_ring_cl->get( counter++ );
sgCopyVec4( slot, bottom_color[i] );
slot = lower_ring_cl->get( counter++ );
sgCopyVec4( slot, lower_color[i] );
}
slot = lower_ring_cl->get( counter++ );
sgCopyVec4( slot, bottom_color[0] );
slot = lower_ring_cl->get( counter++ );
sgCopyVec4( slot, lower_color[0] );
return true;
}
ssgBranch * cGrCelestialBody::build( ssgSimpleState *orb_state, ssgSimpleState *halo_state, double body_size )
{
ssgVertexArray *halo_vl;
ssgTexCoordArray *halo_tl;
// clean-up previous
ssgDeRefDelete( transform );
// build the ssg scene graph sub tree for the sky and connected
// into the provide scene graph branch
transform = new ssgTransform;
transform->ref();
cl = new ssgColourArray( 1 );
sgVec4 color;
sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
cl->add( color );
ssgBranch *orb = grMakeSphere( orb_state, cl, (float)body_size, 15, 15,
grCelestialBodyOrbPreDraw, grCelestialBodyOrbPostDraw );
transform->addKid( orb );
// force a repaint of the colors with arbitrary defaults
repaint( 0.0 );
if (halo_state)
{
// Build ssg structure
float size = float(body_size * 10.0);
sgVec3 v3;
halo_vl = new ssgVertexArray;
sgSetVec3( v3, -size, 0.0, -size );
halo_vl->add( v3 );
sgSetVec3( v3, size, 0.0, -size );
halo_vl->add( v3 );
sgSetVec3( v3, -size, 0.0, size );
halo_vl->add( v3 );
sgSetVec3( v3, size, 0.0, size );
halo_vl->add( v3 );
sgVec2 v2;
halo_tl = new ssgTexCoordArray;
sgSetVec2( v2, 0.0f, 0.0f );
halo_tl->add( v2 );
sgSetVec2( v2, 1.0, 0.0 );
halo_tl->add( v2 );
sgSetVec2( v2, 0.0, 1.0 );
halo_tl->add( v2 );
sgSetVec2( v2, 1.0, 1.0 );
halo_tl->add( v2 );
ssgLeaf *halo =
new ssgVtxTable ( GL_TRIANGLE_STRIP, halo_vl, NULL, halo_tl, cl );
halo->setState( halo_state );
halo->setCallback( SSG_CALLBACK_PREDRAW, grCelestialBodyHaloPreDraw );
halo->setCallback( SSG_CALLBACK_POSTDRAW, grCelestialBodyHaloPostDraw );
transform->addKid( halo );
//transform->addKid(new ssgaLensFlare);
}
return transform;
}
//
// 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 IceFloe::drawGeom() {
int i, j;
float h;
h = height * TransIcelandicExpress::c_RoadLevel;
// draw the sides
sgVec3 edge, n, up;
sgSetVec3( up, 0.0, 1.0, 0.0 );
glBegin( GL_QUADS );
for (j = npnts-1, i = 0; i < npnts; j=i++) {
sgSetVec3( edge, pnts[j][0] - pnts[i][0], 0.0,
pnts[j][2] - pnts[i][2] );
sgNormalizeVec3( edge );
sgVectorProductVec3( n, edge, up );
glNormal3f( n[0], n[1], n[2] );
glVertex3f( pnts[i][0], h, pnts[i][2] );
glVertex3f( pnts[j][0], h, pnts[j][2] );
glVertex3f( pnts[j][0], 0.0, pnts[j][2] );
glVertex3f( pnts[i][0], 0.0, pnts[i][2] );
}
glEnd();
// tesselate the top
if (!tess.size()) {
if (!gluTess) {
gluTess = gluNewTess();
gluTessCallback( gluTess, GLU_BEGIN, (void(__stdcall *)(void))tessBegin );
gluTessCallback( gluTess, GLU_END, (void(__stdcall *)(void))tessEnd );
gluTessCallback( gluTess, GLU_VERTEX, (void(__stdcall *)(void))tessVertex );
gluTessCallback( gluTess, GLU_ERROR, (void(__stdcall *)(void))tessError );
}
printf("Tesselating polygon....\n");
floeToTess = this;
gluBeginPolygon( gluTess );
GLdouble *v;
for (i = 0; i < npnts; i++) {
pnts[i][1] = h;
v = new GLdouble[4];
v[0] = pnts[i][0];
v[1] = pnts[i][1];
v[2] = pnts[i][2];
printf("gluTessVertex %3.4f %3.4f %3.4f\n",
v[0], v[1], v[2] );
gluTessVertex( gluTess, v, pnts[i] );
}
printf("About to call end....\n");
gluEndPolygon( gluTess );
printf("Done.\n");
floeToTess = NULL;
}
// draw the top
glNormal3f( 0.0, 1.0, 0.0 );
glBegin( GL_TRIANGLES );
for (std::vector<TessTri*>::iterator ti = tess.begin();
ti != tess.end(); ti++ ) {
glVertex3f( (*ti)->a[0], (*ti)->a[1], (*ti)->a[2] );
glVertex3f( (*ti)->b[0], (*ti)->b[1], (*ti)->b[2] );
glVertex3f( (*ti)->c[0], (*ti)->c[1], (*ti)->c[2] );
}
glEnd();
}
ssgBranch * cGrStars::build( int num, sgdVec3 *star_data, double star_dist )
{
sgVec4 color;
// clean-up previous
ssgDeRefDelete( stars_transform );
// create new
stars_transform = new ssgTransform;
stars_transform->ref();
if ( star_data == NULL )
{
if (num > 0)
ulSetError(UL_WARNING, "null star data passed to cGrStars::build()");
else
return stars_transform;
}
// set up the orb state
state = new ssgSimpleState();
state->disable( GL_LIGHTING );
state->disable( GL_CULL_FACE );
state->disable( GL_TEXTURE_2D );
state->enable( GL_COLOR_MATERIAL );
state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
state->enable( GL_BLEND );
state->disable( GL_ALPHA_TEST );
vl = new ssgVertexArray( num );
cl = new ssgColourArray( num );
// cl = new ssgColourArray( 1 );
// sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
// cl->add( color );
// Build ssg structure
sgVec3 p;
for ( int i = 0; i < num; ++i )
{
// position seeded to arbitrary values
sgSetVec3( p,
(float)( star_dist * cos( star_data[i][0] )
* cos( star_data[i][1] )),
(float)( star_dist * sin( star_data[i][0] )
* cos( star_data[i][1] )),
(float)( star_dist * sin( star_data[i][1] )));
vl->add( p );
// color (magnitude)
sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
cl->add( color );
}
ssgLeaf *stars_obj =
new ssgVtxTable ( GL_POINTS, vl, NULL, NULL, cl );
stars_obj->setState( state );
stars_obj->setCallback( SSG_CALLBACK_PREDRAW, grStarPreDraw );
stars_obj->setCallback( SSG_CALLBACK_POSTDRAW, grStarPostDraw );
stars_transform->addKid( stars_obj );
return stars_transform;
}
ssgBranch *grMakeSphere(
ssgSimpleState *state, ssgColourArray *cl,
float radius, int slices, int stacks,
ssgCallback predraw, ssgCallback postdraw )
{
double rho, drho, theta, dtheta;
float x, y, z;
float s, t, ds, dt;
int i, j, imin, imax;
float nsign = 1.0;
ssgBranch *sphere = new ssgBranch;
sgVec2 vec2;
sgVec3 vec3;
drho = SGD_PI / (float)stacks;
dtheta = (2.0 * SGD_PI) / (float)slices;
/* texturing: s goes from 0.0/0.25/0.5/0.75/1.0 at +y/+x/-y/-x/+y
axis t goes from -1.0/+1.0 at z = -radius/+radius (linear along
longitudes) cannot use triangle fan on texturing (s coord. at
top/bottom tip varies) */
ds = 1.0f / slices;
dt = 1.0f / stacks;
t = 1.0; /* because loop now runs from 0 */
imin = 0;
imax = stacks;
/* build slices as quad strips */
for ( i = imin; i < imax; i++ )
{
ssgVertexArray *vl = new ssgVertexArray();
ssgNormalArray *nl = new ssgNormalArray();
ssgTexCoordArray *tl = new ssgTexCoordArray();
rho = i * drho;
s = 0.0;
for ( j = 0; j <= slices; j++ )
{
theta = (j == slices) ? 0.0 : j * dtheta;
x = (float)(-sin(theta) * sin(rho));
y = (float)(cos(theta) * sin(rho));
z = (float)(nsign * cos(rho));
sgSetVec3( vec3, x*nsign, y*nsign, z*nsign );
sgNormalizeVec3( vec3 );
nl->add( vec3 );
sgSetVec2( vec2, s, t );
tl->add( vec2 );
sgSetVec3( vec3, x*radius, y*radius, z*radius );
vl->add( vec3 );
x = (float)(-sin(theta) * sin(rho+drho));
y = (float)(cos(theta) * sin(rho+drho));
z = (float)(nsign * cos(rho+drho));
sgSetVec3( vec3, x*nsign, y*nsign, z*nsign );
sgNormalizeVec3( vec3 );
nl->add( vec3 );
sgSetVec2( vec2, s, t-dt );
tl->add( vec2 );
s += ds;
sgSetVec3( vec3, x*radius, y*radius, z*radius );
vl->add( vec3 );
}
ssgLeaf *slice =
new ssgVtxTable ( GL_TRIANGLE_STRIP, vl, nl, tl, cl );
if ( vl->getNum() != nl->getNum() )
{
ulSetError(UL_FATAL, "bad sphere1\n");
exit(-1);
}
if ( vl->getNum() != tl->getNum() )
{
ulSetError(UL_FATAL, "bad sphere2\n");
exit(-1);
}
slice->setState( state );
slice->setCallback( SSG_CALLBACK_PREDRAW, predraw );
slice->setCallback( SSG_CALLBACK_POSTDRAW, postdraw );
sphere->addKid( slice );
t -= dt;
}
return sphere;
}
