solarsystem.cpp

//
//  solarsystem.cpp
//  solarsystem
//
//  Created by Changkun Ou on 16/06/07.
//  Copyright © 2016 Shiyanlou.com. All rights reserved.
//

#include "solarsystem.hpp"
#include <cstdlib>
#define REST 700
#define REST_Y (-REST)
#define REST_Z (REST)


void SolarSystem::onDisplay() {

    glClear(GL_COLOR_BUFFER_BIT  |  GL_DEPTH_BUFFER_BIT);
    glClearColor(.7f, .7f, .7f, .1f);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(75.0f, 1.0f, 1.0f, 40000000);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(viewX, viewY, viewZ, centerX, centerY, centerZ, upX, upY, upZ);

    glEnable(GL_LIGHT0);
    glEnable(GL_LIGHTING);
    glEnable(GL_DEPTH_TEST);

    // 实际绘制
    for (int i=0; i<STARS_NUM; i++)
        stars[i]->draw();

    glutSwapBuffers();
}

#define TIMEPAST 1
void SolarSystem::onUpdate() {

    for (int i=0; i<STARS_NUM; i++)
        stars[i]->update(TIMEPAST);

    this->onDisplay();
}

// 按键操作变化视角
// w(+y方向)
// a(-x方向)
// d(+x方向)
// x(-y方向)
// s(+z方向)
// S(-z方向)
// r(reset)

// 每次按键移动的距离
#define OFFSET 20
void SolarSystem::onKeyboard(unsigned char key, int x, int y) {

    switch (key)    {
        case 'w': viewY += OFFSET; break;
        case 's': viewZ += OFFSET; break;
        case 'S': viewZ -= OFFSET; break;
        case 'a': viewX -= OFFSET; break;
        case 'd': viewX += OFFSET; break;
        case 'x': viewY -= OFFSET; break;
        case 'r':
            viewX = 0; viewY = REST_Y; viewZ = REST_Z;
            centerX = centerY = centerZ = 0;
            upX = upY = 0; upZ = 1;
            break;
        case 27: exit(0); break;
        default: break;
    }

}

#define SUN_RADIUS 48.74
#define MER_RADIUS  7.32
#define VEN_RADIUS 18.15
#define EAR_RADIUS 19.13
#define MOO_RADIUS  6.15
#define MAR_RADIUS 10.19
#define JUP_RADIUS 42.90
#define SAT_RADIUS 36.16
#define URA_RADIUS 25.56
#define NEP_RADIUS 24.78

#define MER_DIS    62.06
#define VEN_DIS   115.56
#define EAR_DIS   168.00
#define MOO_DIS    26.01
#define MAR_DIS   228.00
#define JUP_DIS   333.40
#define SAT_DIS   428.10
#define URA_DIS   848.00
#define NEP_DIS   949.10

#define MER_SPEED   87.0
#define VEN_SPEED  225.0
#define EAR_SPEED  365.0
#define MOO_SPEED   30.0
#define MAR_SPEED  687.0
#define JUP_SPEED 1298.4
#define SAT_SPEED 3225.6
#define URA_SPEED 3066.4
#define NEP_SPEED 6014.8

#define SELFROTATE 3

enum STARS {Sun, Mercury, Venus, Earth, Moon,
    Mars, Jupiter, Saturn, Uranus, Neptune};

// 对太阳系星球的参数进行调整用的宏
#define SET_VALUE_3(name, value0, value1, value2) \
                   ((name)[0])=(value0), ((name)[1])=(value1), ((name)[2])=(value2)

SolarSystem::SolarSystem() {

    // 定义视角
    viewX = 0;
    viewY = REST_Y;
    viewZ = REST_Z;
    centerX = centerY = centerZ = 0;
    upX = upY = 0;
    upZ = 1;

    // 太阳
    GLfloat rgbColor[3] = {1, 0, 0};
    stars[Sun]     = new LightPlanet(SUN_RADIUS, 0, 0, SELFROTATE, 0, rgbColor);
    // 水星
    SET_VALUE_3(rgbColor, .2, .2, .5);
    stars[Mercury] = new Planet(MER_RADIUS, MER_DIS, MER_SPEED, SELFROTATE, stars[Sun], rgbColor);
    // 金星
    SET_VALUE_3(rgbColor, 1, .7, 0);
    stars[Venus]   = new Planet(VEN_RADIUS, VEN_DIS, VEN_SPEED, SELFROTATE, stars[Sun], rgbColor);
    // 地球
    SET_VALUE_3(rgbColor, 0, 1, 0);
    stars[Earth]   = new Planet(EAR_RADIUS, EAR_DIS, EAR_SPEED, SELFROTATE, stars[Sun], rgbColor);
    // 月亮
    SET_VALUE_3(rgbColor, 1, 1, 0);
    stars[Moon]    = new Planet(MOO_RADIUS, MOO_DIS, MOO_SPEED, SELFROTATE, stars[Earth], rgbColor);
    // 火星
    SET_VALUE_3(rgbColor, 1, .5, .5);
    stars[Mars]    = new Planet(MAR_RADIUS, MAR_DIS, MAR_SPEED, SELFROTATE, stars[Sun], rgbColor);
    // 木星
    SET_VALUE_3(rgbColor, 1, 1, .5);
    stars[Jupiter] = new Planet(JUP_RADIUS, JUP_DIS, JUP_SPEED, SELFROTATE, stars[Sun], rgbColor);
    // 土星
    SET_VALUE_3(rgbColor, .5, 1, .5);
    stars[Saturn]  = new Planet(SAT_RADIUS, SAT_DIS, SAT_SPEED, SELFROTATE, stars[Sun], rgbColor);
    // 天王星
    SET_VALUE_3(rgbColor, .4, .4, .4);
    stars[Uranus]  = new Planet(URA_RADIUS, URA_DIS, URA_SPEED, SELFROTATE, stars[Sun], rgbColor);
    // 海王星
    SET_VALUE_3(rgbColor, .5, .5, 1);
    stars[Neptune] = new Planet(NEP_RADIUS, NEP_DIS, NEP_SPEED, SELFROTATE, stars[Sun], rgbColor);

}
SolarSystem::~SolarSystem() {
    for(int i = 0; i<STARS_NUM; i++)
        delete stars[i];
}