OOSunEntity.h

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/*
 
OOSunEntity.h
 
Entity subclass representing a sun.
 
Oolite
Copyright (C) 2004-2013 Giles C Williams and contributors
 
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., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
 
*/
 
 
#import "OOPlanetEntity.h"
 
#import "Entity.h"
#import "legacy_random.h"
#import "OOColor.h"
 
 
#define SUN_CORONA_SAMPLES      729         // Samples at half-degree intervals, with a bit of overlap.
#define MAX_CORONAFLARE         600000.0    // nova flare
 
#ifndef SUN_DIRECT_VISION_GLARE
#define SUN_DIRECT_VISION_GLARE 1
#endif
 
#if SUN_DIRECT_VISION_GLARE
#define SUN_GLARE_MULT_FACTOR 3.0
#define SUN_GLARE_ADD_FACTOR (M_PI/16.0)
#define SUN_GLARE_CORONA_FACTOR 0.5f
#else
#define SUN_GLARE_CORONA_FACTOR 1.5
#endif
 
 
@class ShipEntity;
 
 
@interface OOSunEntity: Entity <OOStellarBody>
{
@private
    GLfloat                 sun_diffuse[4];
    GLfloat                 sun_specular[4];
    
    GLfloat                 discColor[4];
    GLfloat                 outerCoronaColor[4];
    
    GLfloat                 cor16k, lim16k;
    
    double                  corona_speed_factor;     // multiply delta_t by this before adding it to corona_stage
    double                  corona_stage;               // 0.0 -> 1.0
    GLfloat                 rvalue[SUN_CORONA_SAMPLES];   // stores random values for adjusting colors in the corona
    float                   corona_blending;
 
    GLuint         sunTriangles[3240*3];
    GLfloat sunVertices[1801*3];
    GLfloat sunColors[1801*4];
 
    OOTimeDelta              _novaCountdown;
    OOTimeDelta              _novaExpansionTimer;
    float                   _novaExpansionRate;
    
    float                   _sunBrightnessFactor;
    float                   _sunCoronaAlphaFactor;
 
    NSString                *_name;
}
 
- (id) initSunWithColor:(OOColor*)sun_color andDictionary:(NSDictionary*) dict;
- (BOOL) setSunColor:(OOColor*)sun_color;
- (BOOL) changeSunProperty:(NSString *)key withDictionary:(NSDictionary*) dict;
 
- (OOStellarBodyType) planetType;
 
- (void) getDiffuseComponents:(GLfloat[4])components;
- (void) getSpecularComponents:(GLfloat[4])components;
 
- (void) setRadius:(GLfloat) rad andCorona:(GLfloat)corona;
 
- (BOOL) willGoNova;
- (BOOL) goneNova;
- (void) setGoingNova:(BOOL) yesno inTime:(double)interval;
 
- (void) drawStarGlare;
- (void) drawDirectVisionSunGlare;
- (void) resetNova;
 
@end