#include <iostream>
#include <graphics.h>      
#include <easyx.h>
#include "math.h"
#include "time.h"
 
//煙花彈
struct Jet {
    int x = 0, y = 0;
    int hx = 0, hy = 0;
    unsigned long t1 = 0, t2 = 0, dt = 0;
    IMAGE img;
    bool isshoot = 1;
}jet;
Jet jet1, jet2, jet3;
//煙花
struct Fire {
    int r = 0;            //當前半徑
    int maxr = 0;          //最大半徑
    int x = 0, y = 0;     //中心點坐標（窗口）
    int cx = 0, cy = 0;    //中心點坐標（圖畫）
    int xy[240][240];     //保存像素點
    bool isboom = 0;       //是否爆炸
    bool isdraw = 0;      //是否顯示
    unsigned long t1 = 0, t2 = 0, dt = 0;   //爆炸速度
}fire;
Fire fire1, fire2, fire3;
 
void jet_init(Jet* jetn)     //煙花彈的初始化
{
    jetn->x = rand() % 1100 - 20;
    jetn->y = rand() % 50 + 700;
    jetn->hx = jetn->x;
    jetn->hy = rand() % 450;
    jetn->t1 = GetTickCount();  //獲取系統(tǒng)時間
    jetn->isshoot = true;
    jetn->dt = rand() % 10 + 1;
}
 
void fire_init(Fire* firen)
{
    firen->r = 0;
    firen->maxr = 120;
    firen->cx = 120; firen->cy = 120;     //中心點的坐標（圖片）
    firen->isboom = true; firen->isdraw = false;
    firen->t1 = GetTickCount();
    firen->dt = 5;             //煙花爆炸速度
    IMAGE fimg;
    
    loadimage(&fimg, L"煙花4.jpg", 240, 240);
    SetWorkingImage(&fimg);
    for (int a = 0; a < 240; a++)
    {
        for (int b = 0; b < 240; b++)
        {
            firen->xy[a][b] = getpixel(a, b);   //傳入像素點
        }
    }
    SetWorkingImage();
}
 
//函數(shù)測試
void fire_text(Jet* jetn, Fire* firen)
{
    DWORD* pmem = GetImageBuffer();
    jetn->t2 = GetTickCount();
    if (jetn->t2 - jetn->t1 > jetn->dt && jetn->isshoot == true)
    {
        putimage(jetn->x, jetn->y, &jetn->img, SRCINVERT);
        if (jetn->y > jetn->hy)
        {
            jetn->y -= 5;
            putimage(jetn->x, jetn->y, &jetn->img, SRCINVERT);
        }
        if (jetn->y <= jetn->hy)     //煙花彈移動出界
        {
            jetn->isshoot = false;
            putimage(jetn->x, jetn->y, &jetn->img, SRCINVERT);
            fire_init(firen);    //煙花的初始化
            firen->x = jetn->hx + 10;
            firen->y = jetn->hy - 20;
 
        }
        if (jetn->isshoot == false && firen->isboom == true && firen->isdraw == 0)
        {
            jet_init(jetn);
            putimage(jetn->x, jetn->y, &jetn->img, SRCINVERT);
        }
        jetn->t1 = jetn->t2;
        //煙花
        int drt[13] = { 5,5,5,10,10,15,15,25,35,40,40,55,55 }; //不一樣的速度
        firen->t2 = GetTickCount();
        if (firen->t2 - firen->t1 > firen->dt && firen->isboom == true)
        {
            if (firen->r < firen->maxr)
            {
                firen->r++;
                firen->dt = drt[firen->r / 10];
                firen->isdraw = true;
            }
            if (firen->r > firen->maxr - 1)
            {
                firen->isdraw = false;
                firen->isboom = false;
                //初始化煙花
                firen->r = 0;
                firen->maxr = 120;
 
            }
            firen->t1 = firen->t2;
            if (firen->isdraw = true)
            {
                for (double a = 0; a < 6.28; a += 0.01)
                {
                    for (int m = 0; m <= firen->r; m++)
                        //x1 y1 來自像素點的628個像素坐標
                    {
                        int x2 = firen->cx + m * cos(a);
                        int y2 = firen->cy - m * sin(a);
                        //如果數(shù)據(jù)正常，獲取像素點的三原色系
                        if (x2 > 0 && x2 < 240 && y2 > 0 && y2 < 240)
                        {
                            int b = firen->xy[x2][y2] & 0xff;
                            int g = (firen->xy[x2][y2] >> 8) & 0xff;
                            int r = firen->xy[x2][y2] >> 16;
                            //求圈上的點在窗體上的坐標
                            int xx2 = firen->x + m * cos(a);
                            int yy2 = firen->y - m * sin(a);
                            if (/*b > 0x20 && g > 0x20 && r > 0x20 &&*/ xx2 < 1200 && xx2 > 0 && yy2 > 0 && yy2 <= 600)
                            {
                                pmem[yy2 * 1100 + xx2] = BGR(firen->xy[x2][y2]);
                            }
                        }
                    }
                }
                firen->isdraw == false;
            }
        }
    }
}
 
 
int ss = 0;
int Fire_Finally()       //煙花主函數(shù)
{
    initgraph(1100, 800);
    srand(time(0));
/*-----------------------------------------圖片------------------------------------*/
    jet_init(&jet);
    loadimage(&jet.img, L"煙花彈2.jpg", 20, 50);
    putimage(jet.x, jet.y, &jet.img, SRCINVERT);
 
    DWORD* pmem = GetImageBuffer();
    BeginBatchDraw();
 
    while (1)
    {
        for (int clr = 0; clr < 1000; clr++)
        {
            for (int j = 0; j < 2; j++)
            {
                int px1 = rand() % 1200;
                int py1 = rand() % 650;
                if (py1 < 790)
                {
                    pmem[py1 * 1200 + px1] = pmem[py1 * 1200 + px1 + 1] = BLACK;
                }
            }
        }
        fire_text(&jet, &fire);
        FlushBatchDraw();
    }
    EndBatchDraw();
 
    closegraph();
 
    return 0;
}
 
int main()
{
    Fire_Finally();
    system("pause");
    return 0;
}