+++ /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
// $Id$
-// #ifdef __BORLANDC__
-// # define exception c_exception
-// #endif
-// #include <math.h>
-
-// #include <simgear/debug/logstream.hxx>
-
-// #include <Time/sunpos.hxx>
-// #include <Time/light.hxx>
-// #include <Main/options.hxx>
+#include <plib/ssg.h>
+#include <simgear/constants.h>
+#include "sphere.hxx"
#include "skysun.hxx"
// initialize the sun object and connect it into our scene graph root
bool FGSkySun::initialize() {
- sgVec3 color;
-
- float theta;
- int i;
// create the scene graph for the dome
skysun = new ssgRoot;
skysun->setName( "Sky Sun" );
// set up the state
- sun_state = new ssgSimpleState();
- sun_state->setShadeModel( GL_SMOOTH );
- sun_state->disable( GL_LIGHTING );
- sun_state->disable( GL_DEPTH_TEST );
- sun_state->disable( GL_CULL_FACE );
- sun_state->disable( GL_TEXTURE_2D );
- sun_state->disable( GL_COLOR_MATERIAL );
- sun_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
-
- // initially seed to all white
- sgSetVec3( color, 1.0, 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, 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 );
- }
+ orb_state = new ssgSimpleState();
+ orb_state->setShadeModel( GL_SMOOTH );
+ orb_state->disable( GL_LIGHTING );
+ orb_state->disable( GL_DEPTH_TEST );
+ orb_state->disable( GL_CULL_FACE );
+ orb_state->disable( GL_TEXTURE_2D );
+ orb_state->disable( GL_COLOR_MATERIAL );
+ orb_state->setMaterial( GL_AMBIENT_AND_DIFFUSE, 1.0, 1.0, 1.0, 1.0 );
- // 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 );
+ ssgBranch *orb = ssgMakeSphere( orb_state, 550.0, 10, 10 );
- // generate the upper ring
- for ( i = 0; i < 12; i++ ) {
- upper_ring_vl->add( middle_vertex[i] );
- upper_ring_cl->add( color );
+ // force a repaint of the sun colors with arbitrary defaults
+ repaint( 0.0 );
- upper_ring_vl->add( upper_vertex[i] );
- upper_ring_cl->add( color );
- }
- upper_ring_vl->add( middle_vertex[0] );
- upper_ring_cl->add( color );
+ // build the ssg scene graph sub tree for the sky and connected
+ // into the provide scene graph branch
+ sun_selector = new ssgSelector;
+ sun_transform = new ssgTransform;
- upper_ring_vl->add( upper_vertex[0] );
- upper_ring_cl->add( color );
+ // orb->setState( orb_state );
- // generate middle ring
- for ( i = 0; i < 12; i++ ) {
- middle_ring_vl->add( lower_vertex[i] );
- middle_ring_cl->add( color );
+ sun_transform->addKid( orb );
- middle_ring_vl->add( middle_vertex[i] );
- middle_ring_cl->add( color );
- }
- middle_ring_vl->add( lower_vertex[0] );
- middle_ring_cl->add( color );
+ sun_selector->addKid( sun_transform );
+ sun_selector->clrTraversalMaskBits( SSGTRAV_HOT );
- middle_ring_vl->add( middle_vertex[0] );
- middle_ring_cl->add( color );
+ skysun->addKid( sun_selector );
- // generate lower ring
- for ( i = 0; i < 12; i++ ) {
- lower_ring_vl->add( bottom_vertex[i] );
- lower_ring_cl->add( color );
+ return true;
+}
- lower_ring_vl->add( lower_vertex[i] );
- lower_ring_cl->add( color );
+
+// repaint the sun colors based on current value of sun_angle in
+// degrees relative to verticle
+// 0 degrees = high noon
+// 90 degrees = sun rise/set
+// 180 degrees = darkest midnight
+bool FGSkySun::repaint( double sun_angle ) {
+ if ( sun_angle * RAD_TO_DEG < 100 ) {
+ // else sun is well below horizon (so no point in repainting it)
+
+ // x_10 = sun_angle^10
+ double x_10 = sun_angle * sun_angle * sun_angle * sun_angle * sun_angle
+ * sun_angle * sun_angle * sun_angle * sun_angle * sun_angle;
+
+ float ambient = (float)(0.4 * pow (1.1, - x_10 / 30.0));
+ if (ambient < 0.3) { ambient = 0.3; }
+ if (ambient > 1.0) { ambient = 1.0; }
+
+ sgVec3 color;
+ sgSetVec3( color,
+ (ambient * 6.0) - 1.0, // minimum value = 0.8
+ (ambient * 11.0) - 3.0, // minimum value = 0.3
+ (ambient * 12.0) - 3.6 // minimum value = 0.0
+ );
+
+ if (color[0] > 1.0) color[0] = 1.0;
+ if (color[1] > 1.0) color[1] = 1.0;
+ if (color[2] > 1.0) color[2] = 1.0;
+
+ orb_state->setMaterial( GL_AMBIENT_AND_DIFFUSE,
+ color[0], color[1], color[2], 1.0 );
}
- lower_ring_vl->add( bottom_vertex[0] );
- lower_ring_cl->add( color );
- lower_ring_vl->add( lower_vertex[0] );
- lower_ring_cl->add( color );
+ return true;
+}
- // 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
- dome_selector = new ssgSelector;
- dome_transform = new ssgTransform;
+// reposition the sun at the specified right ascension and declination
+bool FGSkySun::reposition( double rightAscension, double declination ) {
+ sgMat4 T, RA, DEC;
+ sgVec3 axis;
+ sgVec3 v;
- ssgVtxTable *center_disk, *upper_ring, *middle_ring, *lower_ring;
+ // xglRotatef(((RAD_TO_DEG * rightAscension)- 90.0), 0.0, 0.0, 1.0);
+ sgSetVec3( axis, 0.0, 0.0, 1.0 );
+ sgMakeRotMat4( RA, (rightAscension * RAD_TO_DEG) - 90.0, axis );
- center_disk = new ssgVtxTable( GL_TRIANGLE_FAN,
- center_disk_vl, NULL, NULL, center_disk_cl );
+ // xglRotatef((RAD_TO_DEG * declination), 1.0, 0.0, 0.0);
+ sgSetVec3( axis, 1.0, 0.0, 0.0 );
+ sgMakeRotMat4( DEC, declination * RAD_TO_DEG, axis );
- upper_ring = new ssgVtxTable( GL_TRIANGLE_STRIP,
- upper_ring_vl, NULL, NULL, upper_ring_cl );
+ // xglTranslatef(0,60000,0);
+ sgSetVec3( v, 0.0, 60000.0, 0.0 );
+ sgMakeTransMat4( T, v );
- middle_ring = new ssgVtxTable( GL_TRIANGLE_STRIP,
- middle_ring_vl, NULL, NULL, middle_ring_cl );
+ sgMat4 TRANSFORM;
+ sgCopyMat4( TRANSFORM, RA );
+ sgPreMultMat4( TRANSFORM, DEC );
+ sgPreMultMat4( TRANSFORM, T );
- lower_ring = new ssgVtxTable( GL_TRIANGLE_STRIP,
- lower_ring_vl, NULL, NULL, lower_ring_cl );
+ sgCoord skypos;
+ sgSetCoord( &skypos, TRANSFORM );
- center_disk->setState( dome_state );
- upper_ring->setState( dome_state );
- middle_ring->setState( dome_state );
- lower_ring->setState( dome_state );
+ sun_transform->setTransform( &skypos );
- dome_transform->addKid( center_disk );
- dome_transform->addKid( upper_ring );
- dome_transform->addKid( middle_ring );
- dome_transform->addKid( lower_ring );
+ return true;
+}
- dome_selector->addKid( dome_transform );
- dome_selector->clrTraversalMaskBits( SSGTRAV_HOT );
- dome->addKid( dome_selector );
+// Draw the sun
+bool FGSkySun::draw() {
+ ssgCullAndDraw( skysun );
return true;
}
projects / simgear.git / commitdiff