something goofy with sunrise, sunset effects.
neptune.cxx neptune.hxx \
pluto.hxx \
saturn.cxx saturn.hxx \
- sky.cxx sky.hxx \
+ skydome.cxx skydome.hxx \
solarsystem.cxx solarsystem.hxx \
star.cxx star.hxx \
stars.cxx stars.hxx \
+++ /dev/null
-// sky.cxx -- model sky with an upside down "bowl"
-//
-// Written by Curtis Olson, started December 1997.
-//
-// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License as
-// published by the Free Software Foundation; either version 2 of the
-// License, or (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-//
-// $Id$
-
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <math.h>
-
-#include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
-
-#include <simgear/constants.h>
-#include <simgear/debug/logstream.hxx>
-#include <simgear/math/fg_random.h>
-
-#include <Aircraft/aircraft.hxx>
-#include <FDM/flight.hxx>
-#include <Main/views.hxx>
-#include <Time/event.hxx>
-#include <Time/fg_time.hxx>
-
-#include "sky.hxx"
-
-
-#ifdef __MWERKS__
-# pragma global_optimizer off
-#endif
-
-
-// in meters of course
-#define CENTER_ELEV 25000.0
-
-#define UPPER_RADIUS 50000.0
-#define UPPER_ELEV 20000.0
-
-#define MIDDLE_RADIUS 70000.0
-#define MIDDLE_ELEV 8000.0
-
-#define LOWER_RADIUS 80000.0
-#define LOWER_ELEV 0.0
-
-#define BOTTOM_RADIUS 50000.0
-#define BOTTOM_ELEV -2000.0
-
-
-static float inner_vertex[12][3];
-static float middle_vertex[12][3];
-static float outer_vertex[12][3];
-static float bottom_vertex[12][3];
-
-static GLubyte upper_color[12][4];
-static GLubyte middle_color[12][4];
-static GLubyte lower_color[12][4];
-
-
-// Defined the shared sky object here
-FGSky current_sky;
-
-
-// Constructor
-FGSky::FGSky( void ) {
-}
-
-
-// Destructor
-FGSky::~FGSky( void ) {
-}
-
-
-// initialize the sky object and connect it into the scene graph
-bool FGSky::initialize( ssgRoot *root ) {
- sgVec3 color;
-
- float theta;
- int i;
-
- // set up the state
- sky_state = new ssgSimpleState();
- if ( current_options.get_shading() == 1 ) {
- sky_state->setShadeModel( GL_SMOOTH );
- } else {
- sky_state->setShadeModel( GL_FLAT );
- }
- sky_state->disable( GL_DEPTH_TEST );
- sky_state->enable( GL_LIGHTING );
- sky_state->disable( GL_FOG );
- sky_state->disable( GL_CULL_FACE );
- sky_state->disable( GL_TEXTURE_2D );
-
- // 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
- sgSetVec3( color, 0.0, 0.0, 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, CENTER_ELEV );
-
- for ( i = 0; i < 12; i++ ) {
- theta = (i * 30.0) * DEG_TO_RAD;
-
- sgSetVec3( upper_vertex[i],
- cos(theta) * UPPER_RADIUS,
- sin(theta) * UPPER_RADIUS,
- UPPER_ELEV );
-
- sgSetVec3( middle_vertex[i],
- cos((double)theta) * MIDDLE_RADIUS,
- sin((double)theta) * MIDDLE_RADIUS,
- MIDDLE_ELEV );
-
- sgSetVec3( lower_vertex[i],
- cos((double)theta) * LOWER_RADIUS,
- sin((double)theta) * LOWER_RADIUS,
- LOWER_ELEV );
-
- sgSetVec3( bottom_vertex[i],
- cos((double)theta) * BOTTOM_RADIUS,
- sin((double)theta) * BOTTOM_RADIUS,
- BOTTOM_ELEV );
- }
-
- // 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 );
-
- // build the ssg scene graph sub tree for the sky and connected
- // into the provide scene graph branch
- sky_selector = new ssgSelector;
- sky_transform = new ssgTransform;
-
- 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( sky_state );
- upper_ring->setState( sky_state );
- middle_ring->setState( sky_state );
- lower_ring->setState( sky_state );
-
- sky_transform->addKid( center_disk );
- sky_transform->addKid( upper_ring );
- sky_transform->addKid( middle_ring );
- sky_transform->addKid( lower_ring );
-
- sky_selector->addKid( sky_transform );
- sky_selector->clrTraversalMaskBits( SSGTRAV_HOT );
-
- root->addKid( sky_selector );
-
- return true;
-}
-
-
-// repaint the sky colors based on current value of sun_angle, sky,
-// and fog colors. This updates the color arrays for ssgVtxTable.
-// sun angle in degrees relative to verticle
-// 0 degrees = high noon
-// 90 degrees = sun rise/set
-// 180 degrees = darkest midnight
-bool FGSky::repaint( sgVec3 sky_color, sgVec3 fog_color, double sun_angle ) {
- double diff;
- sgVec3 outer_param, outer_amt, outer_diff;
- sgVec3 middle_param, middle_amt, middle_diff;
- int i, j;
-
- // Check for sunrise/sunset condition
- if ( (sun_angle > 80.0) && (sun_angle < 100.0) ) {
- // 0.0 - 0.4
- sgSetVec3( outer_param,
- (10.0 - fabs(90.0 - sun_angle)) / 20.0,
- (10.0 - fabs(90.0 - sun_angle)) / 40.0,
- -(10.0 - fabs(90.0 - sun_angle)) / 30.0 );
-
- sgSetVec3( middle_param,
- (10.0 - fabs(90.0 - sun_angle)) / 40.0,
- (10.0 - fabs(90.0 - sun_angle)) / 80.0,
- 0.0 );
-
- sgScaleVec3( outer_diff, outer_param, 1.0 / 6.0 );
-
- sgScaleVec3( middle_diff, middle_param, 1.0 / 6.0 );
- } 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 );
- }
- // printf(" outer_red_param = %.2f outer_red_diff = %.2f\n",
- // outer_red_param, outer_red_diff);
-
- // calculate transition colors between sky and fog
- sgCopyVec3( outer_amt, outer_param );
- sgCopyVec3( middle_amt, middle_param );
-
- //
- // First, recalulate the basic colors
- //
-
- sgVec3 center_color;
- sgVec3 upper_color[12];
- sgVec3 middle_color[12];
- sgVec3 lower_color[12];
- sgVec3 bottom_color[12];
-
- for ( i = 0; i < 6; i++ ) {
- for ( j = 0; j < 3; j++ ) {
- diff = sky_color[j] - fog_color[j];
-
- // printf("sky = %.2f fog = %.2f diff = %.2f\n",
- // l->sky_color[j], l->fog_color[j], diff);
-
- upper_color[i][j] = (GLubyte)((sky_color[j] - diff * 0.3) * 255);
- middle_color[i][j] = (GLubyte)((sky_color[j] - diff * 0.9
- + middle_amt[j]) * 255);
- lower_color[i][j] = (GLubyte)((fog_color[j] + outer_amt[j])
- * 255);
-
- if ( upper_color[i][j] > 255 ) { upper_color[i][j] = 255; }
- if ( upper_color[i][j] < 25 ) { upper_color[i][j] = 25; }
- if ( middle_color[i][j] > 255 ) { middle_color[i][j] = 255; }
- if ( middle_color[i][j] < 25 ) { middle_color[i][j] = 25; }
- if ( lower_color[i][j] > 255 ) { lower_color[i][j] = 255; }
- if ( lower_color[i][j] < 25 ) { lower_color[i][j] = 25; }
- }
- // upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
- // (GLubyte)(sky_color[3] * 255);
-
- for ( j = 0; j < 3; j++ ) {
- outer_amt[j] -= outer_diff[j];
- middle_amt[j] -= middle_diff[j];
- }
-
- /*
- printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
- upper_color[i][1], upper_color[i][2], upper_color[i][3]);
- printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- middle_color[i][0], middle_color[i][1], middle_color[i][2],
- middle_color[i][3]);
- printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- lower_color[i][0], lower_color[i][1], lower_color[i][2],
- lower_color[i][3]);
- */
- }
-
- 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++ ) {
- diff = sky_color[j] - fog_color[j];
-
- // printf("sky = %.2f fog = %.2f diff = %.2f\n",
- // sky_color[j], fog_color[j], diff);
-
- upper_color[i][j] = (GLubyte)((sky_color[j] - diff * 0.3) * 255);
- middle_color[i][j] = (GLubyte)((sky_color[j] - diff * 0.9
- + middle_amt[j]) * 255);
- lower_color[i][j] = (GLubyte)((fog_color[j] + outer_amt[j])
- * 255);
-
- if ( upper_color[i][j] > 255 ) { upper_color[i][j] = 255; }
- if ( upper_color[i][j] < 25 ) { upper_color[i][j] = 25; }
- if ( middle_color[i][j] > 255 ) { middle_color[i][j] = 255; }
- if ( middle_color[i][j] < 25 ) { middle_color[i][j] = 25; }
- if ( lower_color[i][j] > 255 ) { lower_color[i][j] = 255; }
- if ( lower_color[i][j] < 35 ) { lower_color[i][j] = 35; }
- }
- // upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
- // (GLubyte)(sky_color[3] * 255);
-
- for ( j = 0; j < 3; j++ ) {
- outer_amt[j] += outer_diff[j];
- middle_amt[j] += middle_diff[j];
- }
-
- /*
- printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
- upper_color[i][1], upper_color[i][2], upper_color[i][3]);
- printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- middle_color[i][0], middle_color[i][1], middle_color[i][2],
- middle_color[i][3]);
- printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- lower_color[i][0], lower_color[i][1], lower_color[i][2],
- lower_color[i][3]);
- */
- }
-
- for ( i = 0; i < 12; i++ ) {
- sgCopyVec3( 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++ );
- sgCopyVec3( slot, center_color );
- for ( i = 11; i >= 0; i-- ) {
- slot = center_disk_cl->get( counter++ );
- sgCopyVec3( slot, upper_color[i] );
- }
- slot = center_disk_cl->get( counter++ );
- sgCopyVec3( slot, upper_color[11] );
-
- // generate the upper ring
- counter = 0;
- for ( i = 0; i < 12; i++ ) {
- slot = upper_ring_cl->get( counter++ );
- sgCopyVec3( slot, middle_color[i] );
-
- slot = upper_ring_cl->get( counter++ );
- sgCopyVec3( slot, upper_color[i] );
- }
- slot = upper_ring_cl->get( counter++ );
- sgCopyVec3( slot, middle_color[0] );
-
- slot = upper_ring_cl->get( counter++ );
- sgCopyVec3( slot, upper_color[0] );
-
- // generate middle ring
- counter = 0;
- for ( i = 0; i < 12; i++ ) {
- slot = middle_ring_cl->get( counter++ );
- sgCopyVec3( slot, lower_color[i] );
-
- slot = middle_ring_cl->get( counter++ );
- sgCopyVec3( slot, middle_color[i] );
- }
- slot = middle_ring_cl->get( counter++ );
- sgCopyVec3( slot, lower_color[0] );
-
- slot = middle_ring_cl->get( counter++ );
- sgCopyVec3( slot, middle_color[0] );
-
- // generate lower ring
- counter = 0;
- for ( i = 0; i < 12; i++ ) {
- slot = lower_ring_cl->get( counter++ );
- sgCopyVec3( slot, bottom_color[i] );
-
- slot = lower_ring_cl->get( counter++ );
- sgCopyVec3( slot, lower_color[i] );
- }
- slot = lower_ring_cl->get( counter++ );
- sgCopyVec3( slot, bottom_color[0] );
-
- slot = lower_ring_cl->get( counter++ );
- sgCopyVec3( slot, lower_color[0] );
-
- return true;
-}
-
-
-// reposition the sky at the specified origin and orientation
-// lon specifies a rotation about the Z axis
-// lat specifies a rotation about the new Y axis
-// spin specifies a rotation about the new Z axis (and orients the
-// sunrise/set effects
-bool FGSky::reposition( sgVec3 p, double lon, double lat, double spin ) {
- sgMat4 T, LON, LAT, SPIN;
- sgVec3 axis;
-
- // Translate to view position
- // Point3D zero_elev = current_view.get_cur_zero_elev();
- // xglTranslatef( zero_elev.x(), zero_elev.y(), zero_elev.z() );
- sgMakeTransMat4( T, p );
-
- // printf(" Translated to %.2f %.2f %.2f\n",
- // zero_elev.x, zero_elev.y, zero_elev.z );
-
- // Rotate to proper orientation
- // printf(" lon = %.2f lat = %.2f\n", FG_Longitude * RAD_TO_DEG,
- // FG_Latitude * RAD_TO_DEG);
- // xglRotatef( f->get_Longitude() * RAD_TO_DEG, 0.0, 0.0, 1.0 );
- sgSetVec3( axis, 0.0, 0.0, 1.0 );
- sgMakeRotMat4( LON, lon * RAD_TO_DEG, axis );
-
- // xglRotatef( 90.0 - f->get_Latitude() * RAD_TO_DEG, 0.0, 1.0, 0.0 );
- sgSetVec3( axis, 0.0, 1.0, 0.0 );
- sgMakeRotMat4( LAT, 90.0 - lat * RAD_TO_DEG, axis );
-
- // xglRotatef( l->sun_rotation * RAD_TO_DEG, 0.0, 0.0, 1.0 );
- sgSetVec3( axis, 0.0, 0.0, 1.0 );
- sgMakeRotMat4( SPIN, spin * RAD_TO_DEG, axis );
-
- sgMat4 TRANSFORM;
-
- sgCopyMat4( TRANSFORM, T );
- sgPreMultMat4( TRANSFORM, LON );
- sgPreMultMat4( TRANSFORM, LAT );
- sgPreMultMat4( TRANSFORM, SPIN );
-
- sgCoord skypos;
- sgSetCoord( &skypos, TRANSFORM );
-
- sky_transform->setTransform( &skypos );
-
- return true;
-}
-
-
-// Calculate the sky structure vertices
-void fgSkyVerticesInit() {
- float theta;
- int i;
-
- FG_LOG(FG_ASTRO, FG_INFO, " Generating the sky dome vertices.");
-
- for ( i = 0; i < 12; i++ ) {
- theta = (i * 30.0) * DEG_TO_RAD;
-
- inner_vertex[i][0] = cos(theta) * UPPER_RADIUS;
- inner_vertex[i][1] = sin(theta) * UPPER_RADIUS;
- inner_vertex[i][2] = UPPER_ELEV;
-
- // printf(" %.2f %.2f\n", cos(theta) * UPPER_RADIUS,
- // sin(theta) * UPPER_RADIUS);
-
- middle_vertex[i][0] = cos((double)theta) * MIDDLE_RADIUS;
- middle_vertex[i][1] = sin((double)theta) * MIDDLE_RADIUS;
- middle_vertex[i][2] = MIDDLE_ELEV;
-
- outer_vertex[i][0] = cos((double)theta) * LOWER_RADIUS;
- outer_vertex[i][1] = sin((double)theta) * LOWER_RADIUS;
- outer_vertex[i][2] = LOWER_ELEV;
-
- bottom_vertex[i][0] = cos((double)theta) * BOTTOM_RADIUS;
- bottom_vertex[i][1] = sin((double)theta) * BOTTOM_RADIUS;
- bottom_vertex[i][2] = BOTTOM_ELEV;
- }
-}
-
-
-// (Re)calculate the sky colors at each vertex
-void fgSkyColorsInit() {
- fgLIGHT *l;
- double sun_angle, diff;
- double outer_param[3], outer_amt[3], outer_diff[3];
- double middle_param[3], middle_amt[3], middle_diff[3];
- int i, j;
-
- l = &cur_light_params;
-
- FG_LOG( FG_ASTRO, FG_INFO,
- " Generating the sky colors for each vertex." );
-
- // setup for the possibility of sunset effects
- sun_angle = l->sun_angle * RAD_TO_DEG;
- // fgPrintf( FG_ASTRO, FG_INFO,
- // " Sun angle in degrees = %.2f\n", sun_angle);
-
- if ( (sun_angle > 80.0) && (sun_angle < 100.0) ) {
- // 0.0 - 0.4
- outer_param[0] = (10.0 - fabs(90.0 - sun_angle)) / 20.0;
- outer_param[1] = (10.0 - fabs(90.0 - sun_angle)) / 40.0;
- outer_param[2] = -(10.0 - fabs(90.0 - sun_angle)) / 30.0;
- // outer_param[2] = 0.0;
-
- middle_param[0] = (10.0 - fabs(90.0 - sun_angle)) / 40.0;
- middle_param[1] = (10.0 - fabs(90.0 - sun_angle)) / 80.0;
- middle_param[2] = 0.0;
-
- outer_diff[0] = outer_param[0] / 6.0;
- outer_diff[1] = outer_param[1] / 6.0;
- outer_diff[2] = outer_param[2] / 6.0;
-
- middle_diff[0] = middle_param[0] / 6.0;
- middle_diff[1] = middle_param[1] / 6.0;
- middle_diff[2] = middle_param[2] / 6.0;
- } else {
- outer_param[0] = outer_param[1] = outer_param[2] = 0.0;
- middle_param[0] = middle_param[1] = middle_param[2] = 0.0;
-
- outer_diff[0] = outer_diff[1] = outer_diff[2] = 0.0;
- middle_diff[0] = middle_diff[1] = middle_diff[2] = 0.0;
- }
- // printf(" outer_red_param = %.2f outer_red_diff = %.2f\n",
- // outer_red_param, outer_red_diff);
-
- // calculate transition colors between sky and fog
- for ( j = 0; j < 3; j++ ) {
- outer_amt[j] = outer_param[j];
- middle_amt[j] = middle_param[j];
- }
-
- for ( i = 0; i < 6; i++ ) {
- for ( j = 0; j < 3; j++ ) {
- diff = l->sky_color[j] - l->fog_color[j];
-
- // printf("sky = %.2f fog = %.2f diff = %.2f\n",
- // l->sky_color[j], l->fog_color[j], diff);
-
- upper_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.3) * 255);
- middle_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.9
- + middle_amt[j]) * 255);
- lower_color[i][j] = (GLubyte)((l->fog_color[j] + outer_amt[j])
- * 255);
-
- if ( upper_color[i][j] > 255 ) { upper_color[i][j] = 255; }
- if ( upper_color[i][j] < 25 ) { upper_color[i][j] = 25; }
- if ( middle_color[i][j] > 255 ) { middle_color[i][j] = 255; }
- if ( middle_color[i][j] < 25 ) { middle_color[i][j] = 25; }
- if ( lower_color[i][j] > 255 ) { lower_color[i][j] = 255; }
- if ( lower_color[i][j] < 25 ) { lower_color[i][j] = 25; }
- }
- upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
- (GLubyte)(l->sky_color[3] * 255);
-
- for ( j = 0; j < 3; j++ ) {
- outer_amt[j] -= outer_diff[j];
- middle_amt[j] -= middle_diff[j];
- }
-
- /*
- printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
- upper_color[i][1], upper_color[i][2], upper_color[i][3]);
- printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- middle_color[i][0], middle_color[i][1], middle_color[i][2],
- middle_color[i][3]);
- printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- lower_color[i][0], lower_color[i][1], lower_color[i][2],
- lower_color[i][3]);
- */
- }
-
- for ( j = 0; j < 3; j++ ) {
- outer_amt[j] = 0.0;
- middle_amt[j] = 0.0;
- }
-
- for ( i = 6; i < 12; i++ ) {
-
- for ( j = 0; j < 3; j++ ) {
- diff = l->sky_color[j] - l->fog_color[j];
-
- // printf("sky = %.2f fog = %.2f diff = %.2f\n",
- // l->sky_color[j], l->fog_color[j], diff);
-
- upper_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.3) * 255);
- middle_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.9
- + middle_amt[j]) * 255);
- lower_color[i][j] = (GLubyte)((l->fog_color[j] + outer_amt[j])
- * 255);
-
- if ( upper_color[i][j] > 255 ) { upper_color[i][j] = 255; }
- if ( upper_color[i][j] < 25 ) { upper_color[i][j] = 25; }
- if ( middle_color[i][j] > 255 ) { middle_color[i][j] = 255; }
- if ( middle_color[i][j] < 25 ) { middle_color[i][j] = 25; }
- if ( lower_color[i][j] > 255 ) { lower_color[i][j] = 255; }
- if ( lower_color[i][j] < 35 ) { lower_color[i][j] = 35; }
- }
- upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
- (GLubyte)(l->sky_color[3] * 255);
-
- for ( j = 0; j < 3; j++ ) {
- outer_amt[j] += outer_diff[j];
- middle_amt[j] += middle_diff[j];
- }
-
- /*
- printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
- upper_color[i][1], upper_color[i][2], upper_color[i][3]);
- printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- middle_color[i][0], middle_color[i][1], middle_color[i][2],
- middle_color[i][3]);
- printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- lower_color[i][0], lower_color[i][1], lower_color[i][2],
- lower_color[i][3]);
- */
- }
-}
-
-
-// Initialize the sky structure and colors
-void fgSkyInit() {
- FG_LOG( FG_ASTRO, FG_INFO, "Initializing the sky" );
-
- fgSkyVerticesInit();
-
- // regester fgSkyColorsInit() as an event to be run periodically
- global_events.Register( "fgSkyColorsInit()", fgSkyColorsInit,
- fgEVENT::FG_EVENT_READY, 30000);
-}
-
-
-// Draw the Sky
-void fgSkyRender() {
- FGInterface *f;
- fgLIGHT *l;
- GLubyte sky_color[4];
- GLubyte upper_color[4];
- GLubyte middle_color[4];
- GLubyte lower_color[4];
- double diff;
- int i;
-
- f = current_aircraft.fdm_state;
- l = &cur_light_params;
-
- // printf("Rendering the sky.\n");
-
- // calculate the proper colors
- for ( i = 0; i < 3; i++ ) {
- diff = l->sky_color[i] - l->adj_fog_color[i];
-
- // printf("sky = %.2f fog = %.2f diff = %.2f\n",
- // l->sky_color[j], l->adj_fog_color[j], diff);
-
- upper_color[i] = (GLubyte)((l->sky_color[i] - diff * 0.3) * 255);
- middle_color[i] = (GLubyte)((l->sky_color[i] - diff * 0.9) * 255);
- lower_color[i] = (GLubyte)(l->adj_fog_color[i] * 255);
- }
- upper_color[3] = middle_color[3] = lower_color[3] =
- (GLubyte)(l->adj_fog_color[3] * 255);
-
- xglPushMatrix();
-
- // Translate to view position
- Point3D zero_elev = current_view.get_cur_zero_elev();
- xglTranslatef( zero_elev.x(), zero_elev.y(), zero_elev.z() );
- // printf(" Translated to %.2f %.2f %.2f\n",
- // zero_elev.x, zero_elev.y, zero_elev.z );
-
- // Rotate to proper orientation
- // printf(" lon = %.2f lat = %.2f\n", FG_Longitude * RAD_TO_DEG,
- // FG_Latitude * RAD_TO_DEG);
- xglRotatef( f->get_Longitude() * RAD_TO_DEG, 0.0, 0.0, 1.0 );
- xglRotatef( 90.0 - f->get_Latitude() * RAD_TO_DEG, 0.0, 1.0, 0.0 );
- xglRotatef( l->sun_rotation * RAD_TO_DEG, 0.0, 0.0, 1.0 );
-
- // Draw inner/center section of sky*/
- xglBegin( GL_TRIANGLE_FAN );
- for ( i = 0; i < 4; i++ ) {
- sky_color[i] = (GLubyte)(l->sky_color[i] * 255);
- }
- xglColor4fv(l->sky_color);
- xglVertex3f(0.0, 0.0, CENTER_ELEV);
- for ( i = 11; i >= 0; i-- ) {
- xglColor4ubv( upper_color );
- xglVertex3fv( inner_vertex[i] );
- }
- xglColor4ubv( upper_color );
- xglVertex3fv( inner_vertex[11] );
- xglEnd();
-
- // Draw the middle ring
- xglBegin( GL_TRIANGLE_STRIP );
- for ( i = 0; i < 12; i++ ) {
- xglColor4ubv( middle_color );
- // printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- // middle_color[i][0], middle_color[i][1], middle_color[i][2],
- // middle_color[i][3]);
- // xglColor4f(1.0, 0.0, 0.0, 1.0);
- xglVertex3fv( middle_vertex[i] );
- xglColor4ubv( upper_color );
- // printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i,
- // upper_color[i][0], upper_color[i][1], upper_color[i][2],
- // upper_color[i][3]);
- // xglColor4f(0.0, 0.0, 1.0, 1.0);
- xglVertex3fv( inner_vertex[i] );
- }
- xglColor4ubv( middle_color );
- // xglColor4f(1.0, 0.0, 0.0, 1.0);
- xglVertex3fv( middle_vertex[0] );
- xglColor4ubv( upper_color );
- // xglColor4f(0.0, 0.0, 1.0, 1.0);
- xglVertex3fv( inner_vertex[0] );
- xglEnd();
-
- // Draw the outer ring
- xglBegin( GL_TRIANGLE_STRIP );
- for ( i = 0; i < 12; i++ ) {
- xglColor4ubv( lower_color );
- xglVertex3fv( outer_vertex[i] );
- xglColor4ubv( middle_color );
- xglVertex3fv( middle_vertex[i] );
- }
- xglColor4ubv( lower_color );
- xglVertex3fv( outer_vertex[0] );
- xglColor4ubv( middle_color );
- xglVertex3fv( middle_vertex[0] );
- xglEnd();
-
- // Draw the bottom skirt
- xglBegin( GL_TRIANGLE_STRIP );
- xglColor4ubv( lower_color );
- for ( i = 0; i < 12; i++ ) {
- xglVertex3fv( bottom_vertex[i] );
- xglVertex3fv( outer_vertex[i] );
- }
- xglVertex3fv( bottom_vertex[0] );
- xglVertex3fv( outer_vertex[0] );
- xglEnd();
-
- xglPopMatrix();
-}
-
-
+++ /dev/null
-// sky.hxx -- model sky with an upside down "bowl"
-//
-// Written by Curtis Olson, started December 1997.
-//
-// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License as
-// published by the Free Software Foundation; either version 2 of the
-// License, or (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-//
-// $Id$
-
-
-#ifndef _SKY_HXX
-#define _SKY_HXX
-
-
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
-
-#include <plib/ssg.h> // plib include
-
-
-class FGSky {
-
- ssgSelector *sky_selector;
- ssgTransform *sky_transform;
- ssgSimpleState *sky_state;
-
- ssgVertexArray *center_disk_vl;
- ssgColourArray *center_disk_cl;
-
- ssgVertexArray *upper_ring_vl;
- ssgColourArray *upper_ring_cl;
-
- ssgVertexArray *middle_ring_vl;
- ssgColourArray *middle_ring_cl;
-
- ssgVertexArray *lower_ring_vl;
- ssgColourArray *lower_ring_cl;
-
-public:
-
- // Constructor
- FGSky( void );
-
- // Destructor
- ~FGSky( void );
-
- // initialize the sky object and connect it into the scene graph
- // as a kid to to the specified root
- bool initialize( ssgRoot *branch );
-
- // repaint the sky colors based on current value of sun_angle,
- // sky, and fog colors. This updates the color arrays for
- // ssgVtxTable.
- // sun angle in degrees relative to verticle
- // 0 degrees = high noon
- // 90 degrees = sun rise/set
- // 180 degrees = darkest midnight
- bool repaint( sgVec3 sky_color, sgVec3 fog_color, double sun_angle );
-
- // reposition the sky at the specified origin and orientation
- // lon specifies a rotation about the Z axis
- // lat specifies a rotation about the new Y axis
- // spin specifies a rotation about the new Z axis (and orients the
- // sunrise/set effects
- bool reposition( sgVec3 p, double lon, double lat, double spin );
-
- // enable the sky in the scene graph (default)
- void enable() { sky_selector->select( 1 ); }
-
- // disable the sky in the scene graph. The leaf node is still
- // there, how ever it won't be traversed on the cullandrender
- // phase.
- void disable() { sky_selector->select( 0 ); }
-
-};
-
-
-extern FGSky current_sky;
-
-
-// (Re)generate the display list
-void fgSkyInit();
-
-// (Re)calculate the sky colors at each vertex
-void fgSkyColorsInit();
-
-// Draw the Sky
-void fgSkyRender();
-
-
-#endif // _SKY_HXX
-
-
--- /dev/null
+// skydome.cxx -- model sky with an upside down "bowl"
+//
+// Written by Curtis Olson, started December 1997.
+// SSG-ified by Curtis Olson, February 2000.
+//
+// Copyright (C) 1997-2000 Curtis L. Olson - curt@flightgear.org
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#ifdef HAVE_WINDOWS_H
+# include <windows.h>
+#endif
+
+#include <math.h>
+
+#include <GL/glut.h>
+#include <simgear/xgl/xgl.h>
+
+#include <simgear/constants.h>
+#include <simgear/debug/logstream.hxx>
+#include <simgear/math/fg_random.h>
+
+#include <Aircraft/aircraft.hxx>
+#include <FDM/flight.hxx>
+#include <Main/views.hxx>
+#include <Time/event.hxx>
+#include <Time/fg_time.hxx>
+
+#include "skydome.hxx"
+
+
+#ifdef __MWERKS__
+# pragma global_optimizer off
+#endif
+
+
+// in meters of course
+#define CENTER_ELEV 25000.0
+
+#define UPPER_RADIUS 50000.0
+#define UPPER_ELEV 20000.0
+
+#define MIDDLE_RADIUS 70000.0
+#define MIDDLE_ELEV 8000.0
+
+#define LOWER_RADIUS 80000.0
+#define LOWER_ELEV 0.0
+
+#define BOTTOM_RADIUS 50000.0
+#define BOTTOM_ELEV -2000.0
+
+
+// static float inner_vertex[12][3];
+// static float middle_vertex[12][3];
+// static float outer_vertex[12][3];
+// static float bottom_vertex[12][3];
+
+// static GLubyte upper_color[12][4];
+// static GLubyte middle_color[12][4];
+// static GLubyte lower_color[12][4];
+
+
+// Defined the shared sky object here
+FGSkyDome current_sky;
+
+
+// Constructor
+FGSkyDome::FGSkyDome( void ) {
+}
+
+
+// Destructor
+FGSkyDome::~FGSkyDome( void ) {
+}
+
+
+// initialize the sky object and connect it into the scene graph
+bool FGSkyDome::initialize( ssgRoot *root ) {
+ sgVec3 color;
+
+ float theta;
+ int i;
+
+ // set up the state
+ sky_state = new ssgSimpleState();
+ if ( current_options.get_shading() == 1 ) {
+ sky_state->setShadeModel( GL_SMOOTH );
+ } else {
+ sky_state->setShadeModel( GL_FLAT );
+ }
+ sky_state->disable( GL_LIGHTING );
+ sky_state->disable( GL_DEPTH_TEST );
+ sky_state->disable( GL_CULL_FACE );
+ sky_state->disable( GL_TEXTURE );
+ sky_state->enable( GL_COLOR_MATERIAL );
+ sky_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
+
+ // 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
+ sgSetVec3( color, 0.0, 0.0, 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, CENTER_ELEV );
+
+ for ( i = 0; i < 12; i++ ) {
+ theta = (i * 30.0) * DEG_TO_RAD;
+
+ sgSetVec3( upper_vertex[i],
+ cos(theta) * UPPER_RADIUS,
+ sin(theta) * UPPER_RADIUS,
+ UPPER_ELEV );
+
+ sgSetVec3( middle_vertex[i],
+ cos((double)theta) * MIDDLE_RADIUS,
+ sin((double)theta) * MIDDLE_RADIUS,
+ MIDDLE_ELEV );
+
+ sgSetVec3( lower_vertex[i],
+ cos((double)theta) * LOWER_RADIUS,
+ sin((double)theta) * LOWER_RADIUS,
+ LOWER_ELEV );
+
+ sgSetVec3( bottom_vertex[i],
+ cos((double)theta) * BOTTOM_RADIUS,
+ sin((double)theta) * BOTTOM_RADIUS,
+ BOTTOM_ELEV );
+ }
+
+ // 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 );
+
+ // build the ssg scene graph sub tree for the sky and connected
+ // into the provide scene graph branch
+ sky_selector = new ssgSelector;
+ sky_transform = new ssgTransform;
+
+ 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( sky_state );
+ upper_ring->setState( sky_state );
+ middle_ring->setState( sky_state );
+ lower_ring->setState( sky_state );
+
+ sky_transform->addKid( center_disk );
+ sky_transform->addKid( upper_ring );
+ sky_transform->addKid( middle_ring );
+ sky_transform->addKid( lower_ring );
+
+ sky_selector->addKid( sky_transform );
+ sky_selector->clrTraversalMaskBits( SSGTRAV_HOT );
+
+ root->addKid( sky_selector );
+
+ return true;
+}
+
+
+// repaint the sky colors based on current value of sun_angle, sky,
+// and fog colors. This updates the color arrays for ssgVtxTable.
+// sun angle in degrees relative to verticle
+// 0 degrees = high noon
+// 90 degrees = sun rise/set
+// 180 degrees = darkest midnight
+bool FGSkyDome::repaint( sgVec3 sky_color, sgVec3 fog_color, double sun_angle ) {
+ double diff;
+ sgVec3 outer_param, outer_amt, outer_diff;
+ sgVec3 middle_param, middle_amt, middle_diff;
+ int i, j;
+
+ // Check for sunrise/sunset condition
+ if ( (sun_angle > 80.0) && (sun_angle < 100.0) ) {
+ // 0.0 - 0.4
+ sgSetVec3( outer_param,
+ (10.0 - fabs(90.0 - sun_angle)) / 20.0,
+ (10.0 - fabs(90.0 - sun_angle)) / 40.0,
+ -(10.0 - fabs(90.0 - sun_angle)) / 30.0 );
+
+ sgSetVec3( middle_param,
+ (10.0 - fabs(90.0 - sun_angle)) / 40.0,
+ (10.0 - fabs(90.0 - sun_angle)) / 80.0,
+ 0.0 );
+
+ sgScaleVec3( outer_diff, outer_param, 1.0 / 6.0 );
+
+ sgScaleVec3( middle_diff, middle_param, 1.0 / 6.0 );
+ } 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 );
+ }
+ // printf(" outer_red_param = %.2f outer_red_diff = %.2f\n",
+ // outer_red_param, outer_red_diff);
+
+ // calculate transition colors between sky and fog
+ sgCopyVec3( outer_amt, outer_param );
+ sgCopyVec3( middle_amt, middle_param );
+
+ //
+ // First, recalulate the basic colors
+ //
+
+ sgVec3 upper_color[12];
+ sgVec3 middle_color[12];
+ sgVec3 lower_color[12];
+ sgVec3 bottom_color[12];
+
+ for ( i = 0; i < 6; i++ ) {
+ for ( j = 0; j < 3; j++ ) {
+ diff = sky_color[j] - fog_color[j];
+
+ // printf("sky = %.2f fog = %.2f diff = %.2f\n",
+ // l->sky_color[j], l->fog_color[j], diff);
+
+ upper_color[i][j] = sky_color[j] - diff * 0.3;
+ middle_color[i][j] = sky_color[j] - diff * 0.9 + 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] < 0.1 ) { upper_color[i][j] = 0.1; }
+ if ( middle_color[i][j] > 1.0 ) { middle_color[i][j] = 1.0; }
+ if ( middle_color[i][j] < 0.1 ) { middle_color[i][j] = 0.1; }
+ if ( lower_color[i][j] > 1.0 ) { lower_color[i][j] = 1.0; }
+ if ( lower_color[i][j] < 0.1 ) { lower_color[i][j] = 0.1; }
+ }
+ // upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
+ // (GLubyte)(sky_color[3] * 1.0);
+
+ for ( j = 0; j < 3; j++ ) {
+ outer_amt[j] -= outer_diff[j];
+ middle_amt[j] -= middle_diff[j];
+ }
+
+ /*
+ printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
+ upper_color[i][1], upper_color[i][2], upper_color[i][3]);
+ printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ middle_color[i][0], middle_color[i][1], middle_color[i][2],
+ middle_color[i][3]);
+ printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ lower_color[i][0], lower_color[i][1], lower_color[i][2],
+ lower_color[i][3]);
+ */
+ }
+
+ 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++ ) {
+ diff = sky_color[j] - fog_color[j];
+
+ // printf("sky = %.2f fog = %.2f diff = %.2f\n",
+ // sky_color[j], fog_color[j], diff);
+
+ upper_color[i][j] = sky_color[j] - diff * 0.3;
+ middle_color[i][j] = sky_color[j] - diff * 0.9 + 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] < 0.1 ) { upper_color[i][j] = 0.1; }
+ if ( middle_color[i][j] > 1.0 ) { middle_color[i][j] = 1.0; }
+ if ( middle_color[i][j] < 0.1 ) { middle_color[i][j] = 0.1; }
+ if ( lower_color[i][j] > 1.0 ) { lower_color[i][j] = 1.0; }
+ if ( lower_color[i][j] < 35 ) { lower_color[i][j] = 35; }
+ }
+ // upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
+ // (GLubyte)(sky_color[3] * 1.0);
+
+ for ( j = 0; j < 3; j++ ) {
+ outer_amt[j] += outer_diff[j];
+ middle_amt[j] += middle_diff[j];
+ }
+
+ /*
+ printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
+ upper_color[i][1], upper_color[i][2], upper_color[i][3]);
+ printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ middle_color[i][0], middle_color[i][1], middle_color[i][2],
+ middle_color[i][3]);
+ printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ lower_color[i][0], lower_color[i][1], lower_color[i][2],
+ lower_color[i][3]);
+ */
+ }
+
+ for ( i = 0; i < 12; i++ ) {
+ sgCopyVec3( 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++ );
+ // sgVec3 red;
+ // sgSetVec3( red, 1.0, 0.0, 0.0 );
+ sgCopyVec3( slot, sky_color );
+ for ( i = 11; i >= 0; i-- ) {
+ slot = center_disk_cl->get( counter++ );
+ sgCopyVec3( slot, upper_color[i] );
+ }
+ slot = center_disk_cl->get( counter++ );
+ sgCopyVec3( slot, upper_color[11] );
+
+ // generate the upper ring
+ counter = 0;
+ for ( i = 0; i < 12; i++ ) {
+ slot = upper_ring_cl->get( counter++ );
+ sgCopyVec3( slot, middle_color[i] );
+
+ slot = upper_ring_cl->get( counter++ );
+ sgCopyVec3( slot, upper_color[i] );
+ }
+ slot = upper_ring_cl->get( counter++ );
+ sgCopyVec3( slot, middle_color[0] );
+
+ slot = upper_ring_cl->get( counter++ );
+ sgCopyVec3( slot, upper_color[0] );
+
+ // generate middle ring
+ counter = 0;
+ for ( i = 0; i < 12; i++ ) {
+ slot = middle_ring_cl->get( counter++ );
+ sgCopyVec3( slot, lower_color[i] );
+
+ slot = middle_ring_cl->get( counter++ );
+ sgCopyVec3( slot, middle_color[i] );
+ }
+ slot = middle_ring_cl->get( counter++ );
+ sgCopyVec3( slot, lower_color[0] );
+
+ slot = middle_ring_cl->get( counter++ );
+ sgCopyVec3( slot, middle_color[0] );
+
+ // generate lower ring
+ counter = 0;
+ for ( i = 0; i < 12; i++ ) {
+ slot = lower_ring_cl->get( counter++ );
+ sgCopyVec3( slot, bottom_color[i] );
+
+ slot = lower_ring_cl->get( counter++ );
+ sgCopyVec3( slot, lower_color[i] );
+ }
+ slot = lower_ring_cl->get( counter++ );
+ sgCopyVec3( slot, bottom_color[0] );
+
+ slot = lower_ring_cl->get( counter++ );
+ sgCopyVec3( slot, lower_color[0] );
+
+ return true;
+}
+
+
+// reposition the sky at the specified origin and orientation
+// lon specifies a rotation about the Z axis
+// lat specifies a rotation about the new Y axis
+// spin specifies a rotation about the new Z axis (and orients the
+// sunrise/set effects
+bool FGSkyDome::reposition( sgVec3 p, double lon, double lat, double spin ) {
+ sgMat4 T, LON, LAT, SPIN;
+ sgVec3 axis;
+
+ // Translate to view position
+ // Point3D zero_elev = current_view.get_cur_zero_elev();
+ // xglTranslatef( zero_elev.x(), zero_elev.y(), zero_elev.z() );
+ sgMakeTransMat4( T, p );
+
+ // printf(" Translated to %.2f %.2f %.2f\n",
+ // zero_elev.x, zero_elev.y, zero_elev.z );
+
+ // Rotate to proper orientation
+ // printf(" lon = %.2f lat = %.2f\n", FG_Longitude * RAD_TO_DEG,
+ // FG_Latitude * RAD_TO_DEG);
+ // xglRotatef( f->get_Longitude() * RAD_TO_DEG, 0.0, 0.0, 1.0 );
+ sgSetVec3( axis, 0.0, 0.0, 1.0 );
+ sgMakeRotMat4( LON, lon * RAD_TO_DEG, axis );
+
+ // xglRotatef( 90.0 - f->get_Latitude() * RAD_TO_DEG, 0.0, 1.0, 0.0 );
+ sgSetVec3( axis, 0.0, 1.0, 0.0 );
+ sgMakeRotMat4( LAT, 90.0 - lat * RAD_TO_DEG, axis );
+
+ // xglRotatef( l->sun_rotation * RAD_TO_DEG, 0.0, 0.0, 1.0 );
+ sgSetVec3( axis, 0.0, 0.0, 1.0 );
+ sgMakeRotMat4( SPIN, spin * RAD_TO_DEG, axis );
+
+ sgMat4 TRANSFORM;
+
+ sgCopyMat4( TRANSFORM, T );
+ sgPreMultMat4( TRANSFORM, LON );
+ sgPreMultMat4( TRANSFORM, LAT );
+ sgPreMultMat4( TRANSFORM, SPIN );
+
+ sgCoord skypos;
+ sgSetCoord( &skypos, TRANSFORM );
+
+ sky_transform->setTransform( &skypos );
+
+ return true;
+}
+
+
+#if 0
+
+// depricated code from here to the end
+
+
+// Calculate the sky structure vertices
+void fgSkyVerticesInit() {
+ float theta;
+ int i;
+
+ FG_LOG(FG_ASTRO, FG_INFO, " Generating the sky dome vertices.");
+
+ for ( i = 0; i < 12; i++ ) {
+ theta = (i * 30.0) * DEG_TO_RAD;
+
+ inner_vertex[i][0] = cos(theta) * UPPER_RADIUS;
+ inner_vertex[i][1] = sin(theta) * UPPER_RADIUS;
+ inner_vertex[i][2] = UPPER_ELEV;
+
+ // printf(" %.2f %.2f\n", cos(theta) * UPPER_RADIUS,
+ // sin(theta) * UPPER_RADIUS);
+
+ middle_vertex[i][0] = cos((double)theta) * MIDDLE_RADIUS;
+ middle_vertex[i][1] = sin((double)theta) * MIDDLE_RADIUS;
+ middle_vertex[i][2] = MIDDLE_ELEV;
+
+ outer_vertex[i][0] = cos((double)theta) * LOWER_RADIUS;
+ outer_vertex[i][1] = sin((double)theta) * LOWER_RADIUS;
+ outer_vertex[i][2] = LOWER_ELEV;
+
+ bottom_vertex[i][0] = cos((double)theta) * BOTTOM_RADIUS;
+ bottom_vertex[i][1] = sin((double)theta) * BOTTOM_RADIUS;
+ bottom_vertex[i][2] = BOTTOM_ELEV;
+ }
+}
+
+
+// (Re)calculate the sky colors at each vertex
+void fgSkyColorsInit() {
+ fgLIGHT *l;
+ double sun_angle, diff;
+ double outer_param[3], outer_amt[3], outer_diff[3];
+ double middle_param[3], middle_amt[3], middle_diff[3];
+ int i, j;
+
+ l = &cur_light_params;
+
+ FG_LOG( FG_ASTRO, FG_INFO,
+ " Generating the sky colors for each vertex." );
+
+ // setup for the possibility of sunset effects
+ sun_angle = l->sun_angle * RAD_TO_DEG;
+ // fgPrintf( FG_ASTRO, FG_INFO,
+ // " Sun angle in degrees = %.2f\n", sun_angle);
+
+ if ( (sun_angle > 80.0) && (sun_angle < 100.0) ) {
+ // 0.0 - 0.4
+ outer_param[0] = (10.0 - fabs(90.0 - sun_angle)) / 20.0;
+ outer_param[1] = (10.0 - fabs(90.0 - sun_angle)) / 40.0;
+ outer_param[2] = -(10.0 - fabs(90.0 - sun_angle)) / 30.0;
+ // outer_param[2] = 0.0;
+
+ middle_param[0] = (10.0 - fabs(90.0 - sun_angle)) / 40.0;
+ middle_param[1] = (10.0 - fabs(90.0 - sun_angle)) / 80.0;
+ middle_param[2] = 0.0;
+
+ outer_diff[0] = outer_param[0] / 6.0;
+ outer_diff[1] = outer_param[1] / 6.0;
+ outer_diff[2] = outer_param[2] / 6.0;
+
+ middle_diff[0] = middle_param[0] / 6.0;
+ middle_diff[1] = middle_param[1] / 6.0;
+ middle_diff[2] = middle_param[2] / 6.0;
+ } else {
+ outer_param[0] = outer_param[1] = outer_param[2] = 0.0;
+ middle_param[0] = middle_param[1] = middle_param[2] = 0.0;
+
+ outer_diff[0] = outer_diff[1] = outer_diff[2] = 0.0;
+ middle_diff[0] = middle_diff[1] = middle_diff[2] = 0.0;
+ }
+ // printf(" outer_red_param = %.2f outer_red_diff = %.2f\n",
+ // outer_red_param, outer_red_diff);
+
+ // calculate transition colors between sky and fog
+ for ( j = 0; j < 3; j++ ) {
+ outer_amt[j] = outer_param[j];
+ middle_amt[j] = middle_param[j];
+ }
+
+ for ( i = 0; i < 6; i++ ) {
+ for ( j = 0; j < 3; j++ ) {
+ diff = l->sky_color[j] - l->fog_color[j];
+
+ // printf("sky = %.2f fog = %.2f diff = %.2f\n",
+ // l->sky_color[j], l->fog_color[j], diff);
+
+ upper_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.3) * 255);
+ middle_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.9
+ + middle_amt[j]) * 255);
+ lower_color[i][j] = (GLubyte)((l->fog_color[j] + outer_amt[j])
+ * 255);
+
+ if ( upper_color[i][j] > 255 ) { upper_color[i][j] = 255; }
+ if ( upper_color[i][j] < 25 ) { upper_color[i][j] = 25; }
+ if ( middle_color[i][j] > 255 ) { middle_color[i][j] = 255; }
+ if ( middle_color[i][j] < 25 ) { middle_color[i][j] = 25; }
+ if ( lower_color[i][j] > 255 ) { lower_color[i][j] = 255; }
+ if ( lower_color[i][j] < 25 ) { lower_color[i][j] = 25; }
+ }
+ upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
+ (GLubyte)(l->sky_color[3] * 255);
+
+ for ( j = 0; j < 3; j++ ) {
+ outer_amt[j] -= outer_diff[j];
+ middle_amt[j] -= middle_diff[j];
+ }
+
+ /*
+ printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
+ upper_color[i][1], upper_color[i][2], upper_color[i][3]);
+ printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ middle_color[i][0], middle_color[i][1], middle_color[i][2],
+ middle_color[i][3]);
+ printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ lower_color[i][0], lower_color[i][1], lower_color[i][2],
+ lower_color[i][3]);
+ */
+ }
+
+ for ( j = 0; j < 3; j++ ) {
+ outer_amt[j] = 0.0;
+ middle_amt[j] = 0.0;
+ }
+
+ for ( i = 6; i < 12; i++ ) {
+
+ for ( j = 0; j < 3; j++ ) {
+ diff = l->sky_color[j] - l->fog_color[j];
+
+ // printf("sky = %.2f fog = %.2f diff = %.2f\n",
+ // l->sky_color[j], l->fog_color[j], diff);
+
+ upper_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.3) * 255);
+ middle_color[i][j] = (GLubyte)((l->sky_color[j] - diff * 0.9
+ + middle_amt[j]) * 255);
+ lower_color[i][j] = (GLubyte)((l->fog_color[j] + outer_amt[j])
+ * 255);
+
+ if ( upper_color[i][j] > 255 ) { upper_color[i][j] = 255; }
+ if ( upper_color[i][j] < 25 ) { upper_color[i][j] = 25; }
+ if ( middle_color[i][j] > 255 ) { middle_color[i][j] = 255; }
+ if ( middle_color[i][j] < 25 ) { middle_color[i][j] = 25; }
+ if ( lower_color[i][j] > 255 ) { lower_color[i][j] = 255; }
+ if ( lower_color[i][j] < 35 ) { lower_color[i][j] = 35; }
+ }
+ upper_color[i][3] = middle_color[i][3] = lower_color[i][3] =
+ (GLubyte)(l->sky_color[3] * 255);
+
+ for ( j = 0; j < 3; j++ ) {
+ outer_amt[j] += outer_diff[j];
+ middle_amt[j] += middle_diff[j];
+ }
+
+ /*
+ printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i, upper_color[i][0],
+ upper_color[i][1], upper_color[i][2], upper_color[i][3]);
+ printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ middle_color[i][0], middle_color[i][1], middle_color[i][2],
+ middle_color[i][3]);
+ printf("lower_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ lower_color[i][0], lower_color[i][1], lower_color[i][2],
+ lower_color[i][3]);
+ */
+ }
+}
+
+
+// Initialize the sky structure and colors
+void fgSkyInit() {
+ FG_LOG( FG_ASTRO, FG_INFO, "Initializing the sky" );
+
+ fgSkyVerticesInit();
+
+ // regester fgSkyColorsInit() as an event to be run periodically
+ global_events.Register( "fgSkyColorsInit()", fgSkyColorsInit,
+ fgEVENT::FG_EVENT_READY, 30000);
+}
+
+
+// Draw the Sky
+void fgSkyRender() {
+ FGInterface *f;
+ fgLIGHT *l;
+ GLubyte sky_color[4];
+ GLubyte upper_color[4];
+ GLubyte middle_color[4];
+ GLubyte lower_color[4];
+ double diff;
+ int i;
+
+ f = current_aircraft.fdm_state;
+ l = &cur_light_params;
+
+ // printf("Rendering the sky.\n");
+
+ // calculate the proper colors
+ for ( i = 0; i < 3; i++ ) {
+ diff = l->sky_color[i] - l->adj_fog_color[i];
+
+ // printf("sky = %.2f fog = %.2f diff = %.2f\n",
+ // l->sky_color[j], l->adj_fog_color[j], diff);
+
+ upper_color[i] = (GLubyte)((l->sky_color[i] - diff * 0.3) * 255);
+ middle_color[i] = (GLubyte)((l->sky_color[i] - diff * 0.9) * 255);
+ lower_color[i] = (GLubyte)(l->adj_fog_color[i] * 255);
+ }
+ upper_color[3] = middle_color[3] = lower_color[3] =
+ (GLubyte)(l->adj_fog_color[3] * 255);
+
+ xglPushMatrix();
+
+ // Translate to view position
+ Point3D zero_elev = current_view.get_cur_zero_elev();
+ xglTranslatef( zero_elev.x(), zero_elev.y(), zero_elev.z() );
+ // printf(" Translated to %.2f %.2f %.2f\n",
+ // zero_elev.x, zero_elev.y, zero_elev.z );
+
+ // Rotate to proper orientation
+ // printf(" lon = %.2f lat = %.2f\n", FG_Longitude * RAD_TO_DEG,
+ // FG_Latitude * RAD_TO_DEG);
+ xglRotatef( f->get_Longitude() * RAD_TO_DEG, 0.0, 0.0, 1.0 );
+ xglRotatef( 90.0 - f->get_Latitude() * RAD_TO_DEG, 0.0, 1.0, 0.0 );
+ xglRotatef( l->sun_rotation * RAD_TO_DEG, 0.0, 0.0, 1.0 );
+
+ // Draw inner/center section of sky*/
+ xglBegin( GL_TRIANGLE_FAN );
+ for ( i = 0; i < 4; i++ ) {
+ sky_color[i] = (GLubyte)(l->sky_color[i] * 255);
+ }
+ xglColor4fv(l->sky_color);
+ xglVertex3f(0.0, 0.0, CENTER_ELEV);
+ for ( i = 11; i >= 0; i-- ) {
+ xglColor4ubv( upper_color );
+ xglVertex3fv( inner_vertex[i] );
+ }
+ xglColor4ubv( upper_color );
+ xglVertex3fv( inner_vertex[11] );
+ xglEnd();
+
+ // Draw the middle ring
+ xglBegin( GL_TRIANGLE_STRIP );
+ for ( i = 0; i < 12; i++ ) {
+ xglColor4ubv( middle_color );
+ // printf("middle_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ // middle_color[i][0], middle_color[i][1], middle_color[i][2],
+ // middle_color[i][3]);
+ // xglColor4f(1.0, 0.0, 0.0, 1.0);
+ xglVertex3fv( middle_vertex[i] );
+ xglColor4ubv( upper_color );
+ // printf("upper_color[%d] = %.2f %.2f %.2f %.2f\n", i,
+ // upper_color[i][0], upper_color[i][1], upper_color[i][2],
+ // upper_color[i][3]);
+ // xglColor4f(0.0, 0.0, 1.0, 1.0);
+ xglVertex3fv( inner_vertex[i] );
+ }
+ xglColor4ubv( middle_color );
+ // xglColor4f(1.0, 0.0, 0.0, 1.0);
+ xglVertex3fv( middle_vertex[0] );
+ xglColor4ubv( upper_color );
+ // xglColor4f(0.0, 0.0, 1.0, 1.0);
+ xglVertex3fv( inner_vertex[0] );
+ xglEnd();
+
+ // Draw the outer ring
+ xglBegin( GL_TRIANGLE_STRIP );
+ for ( i = 0; i < 12; i++ ) {
+ xglColor4ubv( lower_color );
+ xglVertex3fv( outer_vertex[i] );
+ xglColor4ubv( middle_color );
+ xglVertex3fv( middle_vertex[i] );
+ }
+ xglColor4ubv( lower_color );
+ xglVertex3fv( outer_vertex[0] );
+ xglColor4ubv( middle_color );
+ xglVertex3fv( middle_vertex[0] );
+ xglEnd();
+
+ // Draw the bottom skirt
+ xglBegin( GL_TRIANGLE_STRIP );
+ xglColor4ubv( lower_color );
+ for ( i = 0; i < 12; i++ ) {
+ xglVertex3fv( bottom_vertex[i] );
+ xglVertex3fv( outer_vertex[i] );
+ }
+ xglVertex3fv( bottom_vertex[0] );
+ xglVertex3fv( outer_vertex[0] );
+ xglEnd();
+
+ xglPopMatrix();
+}
+
+
+#endif
--- /dev/null
+// skydome.hxx -- model sky with an upside down "bowl"
+//
+// Written by Curtis Olson, started December 1997.
+// SSG-ified by Curtis Olson, February 2000.
+//
+// Copyright (C) 1997-2000 Curtis L. Olson - curt@flightgear.org
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+
+#ifndef _SKYDOME_HXX
+#define _SKYDOME_HXX
+
+
+#ifndef __cplusplus
+# error This library requires C++
+#endif
+
+
+#include <plib/ssg.h> // plib include
+
+
+class FGSkyDome {
+
+ ssgSelector *sky_selector;
+ ssgTransform *sky_transform;
+ ssgSimpleState *sky_state;
+
+ ssgVertexArray *center_disk_vl;
+ ssgColourArray *center_disk_cl;
+
+ ssgVertexArray *upper_ring_vl;
+ ssgColourArray *upper_ring_cl;
+
+ ssgVertexArray *middle_ring_vl;
+ ssgColourArray *middle_ring_cl;
+
+ ssgVertexArray *lower_ring_vl;
+ ssgColourArray *lower_ring_cl;
+
+public:
+
+ // Constructor
+ FGSkyDome( void );
+
+ // Destructor
+ ~FGSkyDome( void );
+
+ // initialize the sky object and connect it into the scene graph
+ // as a kid to to the specified root
+ bool initialize( ssgRoot *branch );
+
+ // repaint the sky colors based on current value of sun_angle,
+ // sky, and fog colors. This updates the color arrays for
+ // ssgVtxTable.
+ // sun angle in degrees relative to verticle
+ // 0 degrees = high noon
+ // 90 degrees = sun rise/set
+ // 180 degrees = darkest midnight
+ bool repaint( sgVec3 sky_color, sgVec3 fog_color, double sun_angle );
+
+ // reposition the sky at the specified origin and orientation
+ // lon specifies a rotation about the Z axis
+ // lat specifies a rotation about the new Y axis
+ // spin specifies a rotation about the new Z axis (and orients the
+ // sunrise/set effects
+ bool reposition( sgVec3 p, double lon, double lat, double spin );
+
+ // enable the sky in the scene graph (default)
+ void enable() { sky_selector->select( 1 ); }
+
+ // disable the sky in the scene graph. The leaf node is still
+ // there, how ever it won't be traversed on the cullandrender
+ // phase.
+ void disable() { sky_selector->select( 0 ); }
+
+};
+
+
+extern FGSkyDome current_sky;
+
+
+// (Re)generate the display list
+// void fgSkyInit();
+
+// (Re)calculate the sky colors at each vertex
+// void fgSkyColorsInit();
+
+// Draw the Sky
+// void fgSkyRender();
+
+
+#endif // _SKYDOM_HXX
+
+
projects / simgear.git / commitdiff