unit1.cpp

一个烟花演示的程序代码

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop
#include <math>
#include "Unit1.h"
#include "stdlib.h"
#include "mmsystem.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
       m_mouseX = 0;
        m_mouseY = 0;
        m_sleepTime = 1;
        isError = false;
        isInitialized = false;

        //        rand = new Random();
        bits = 10000;
        bit_px = new double[bits];
        bit_py = new double[bits];
        bit_vx = new double[bits];
        bit_vy = new double[bits];
        bit_sx = new int[bits];
        bit_sy = new int[bits];
        bit_l = new int[bits];
        bit_f = new int[bits];
        bit_p = new int[bits];
        bit_c = new int[bits];
        ru = 50;
        rv = 50;
        dy=0;
        bmp = new Graphics::TBitmap;
        testbmp = new Graphics::TBitmap;
        testbmp->LoadFromFile("test.bmp");
        Width=400;
        Height=240;
}
//---------------------------------------------------------------------------
__fastcall TForm1::~TForm1()
{
        delete bit_px;
        delete bit_py;
        delete bit_vx;
        delete bit_vy;
        delete bit_sx;
        delete bit_sy;
        delete bit_l;
        delete bit_f;
        delete bit_p;
        delete bit_c;
        delete bmp;
}

void __fastcall TForm1::Init()
{
        bits = 10000;   // "para_bits"
        bit_max = 150;  // "para_max"
        ru = 50;        // "para_blendx"
        rv = 50;        // "para_blendy"

        m_nAppX =Width;
        m_nAppY = Height;
        m_centerX = m_nAppX / 2;
        m_centerY = m_nAppY / 2;
        m_mouseX = m_centerX;
        m_mouseY = m_centerY;

        pixls = m_nAppX * m_nAppY;
        pixls2 = pixls - m_nAppX * 2;
        pix0 = new int[pixls];

        for(int i = 0; i < pixls; i++)
            pix0[i] = 0xff000000;

        for(int j = 0; j < bits; j++)
            bit_f[j] = 0;

        bmp->Width = Width;
        bmp->Height = Height;
        bmp->PixelFormat= pf24bit;

        bit_sound=2;
        isInitialized = true;
        run();
}
void __fastcall TForm1::run()
{
    //generator.seed(std::time(0));
    //boost::uniform_01<base_generator_type> randor(generator);
   
    isStopped = true;
    do
    {
        for(int j = 0; j < pixls2; j++)
        {
            int k = pix0[j];
            int l = pix0[j + 1];
            int i1 = pix0[j + m_nAppX];
            int j1 = pix0[j + m_nAppX + 1];

            int i = (k & 0xff0000) >> 16;
            int k1 = ((((l & 0xff0000) >> 16) - i) * ru >> 8) + i;
            i = (k & 0xff00) >> 8;
            int l1 = ((((l & 0xff00) >> 8) - i) * ru >> 8) + i;
            i = k & 0xff;
            int i2 = (((l & 0xff) - i) * ru >> 8) + i;
            i = (i1 & 0xff0000) >> 16;
            int j2 = ((((j1 & 0xff0000) >> 16) - i) * ru >> 8) + i;
            i = (i1 & 0xff00) >> 8;
            int k2 = ((((j1 & 0xff00) >> 8) - i) * ru >> 8) + i;
            i = i1 & 0xff;

            int l2 = (((j1 & 0xff) - i) * ru >> 8) + i;
            int i3 = ((j2 - k1) * rv >> 8) + k1;
            int j3 = ((k2 - l1) * rv >> 8) + l1;
            int k3 = ((l2 - i2) * rv >> 8) + i2;
            pix0[j] = i3 << 16 | j3 << 8 | k3 | 0xff000000;
        }

        rend();
        int pix;
        for(int y = 0; y < bmp->Height; y++)
        {
           BYTE * ptr = (BYTE *)bmp->ScanLine[y];
           BYTE * ptr1= (BYTE *)testbmp->ScanLine[y+dy];
           for (int x=0; x < bmp->Width;x++)
           {
              pix = bit_get(x,y);

              ptr[x*3] = GetRValue(pix) | ptr1[x*3];
              ptr[x*3+1] = GetGValue(pix) | ptr1[x*3+1];
              ptr[x*3+2] = GetBValue(pix) | ptr1[x*3+2];


              //bmp->Canvas->Pixels[x][y]=GetRValue(pix)*0x10000+GetGValue(pix)*0x100+GetBValue(pix);
           }


        }
        dy=(dy+1)%480;
        Canvas->CopyRect(ClientRect, bmp->Canvas, ClientRect);


        //Sleep(m_sleepTime);
        Application->ProcessMessages();
    } while(isStopped);
}


void __fastcall TForm1::bit_set(int i, int j, int k)
{
    int l = i + j * m_nAppX;
    pix0[l] = k;
}

int __fastcall TForm1::bit_get(int i, int j)
{
    int l = i + j * m_nAppX;
    return pix0[l] ;
}

void __fastcall TForm1::FormMouseDown(TObject *Sender, TMouseButton Button,
      TShiftState Shift, int X, int Y)
{
    //generator.seed(std::time(0));
    //boost::uniform_01<base_generator_type> randor(generator);
    

    m_mouseX = X;
    m_mouseY = Y;

    int k = (int)(randor() * 256.);
    
    int l = (int)(randor() * 256.);

    int i1 = (int)(randor() * 256.);
    int j1 = k << 16 | l << 8 | i1 | 0xff000000;
    int k1 = 0;

    for(int l1 = 0; l1 < bits; l1++)
    {
        if(bit_f[l1] != 0)
            continue;
        bit_px[l1] = m_mouseX;
        bit_py[l1] = m_mouseY;
        double d = randor() * 6.2800000000000002;
        double d1 = randor();
        bit_vx[l1] = sin(d) * d1;
        bit_vy[l1] = cos(d) * d1;
        bit_l[l1] = (int)(randor() * 100.) + 100;
        
        bit_p[l1] = (int)(randor() * 3.);
        bit_c[l1] = j1;
        bit_sx[l1] = m_mouseX;
        bit_sy[l1] = m_nAppY - 5;
        bit_f[l1] = 2;
        if(++k1 == bit_max)
            break;
    }
    if(bit_sound > 1)
          PlaySound("syu.wav",0,SND_ASYNC |SND_FILENAME);
}
//---------------------------------------------------------------------------
void  __fastcall TForm1::rend()
{
    //generator.seed(std::time(0));
    //boost::uniform_01<base_generator_type> randor(generator);
    

    bool flag = false;
    bool flag1 = false;
    bool flag2 = false;
    for(int k = 0; k < bits; k++)
    {
        switch(bit_f[k])
        {
        default:
            break;

        case 1: // '\001'

            bit_vy[k] += randor() / 50.;
            bit_px[k] += bit_vx[k];
            bit_py[k] += bit_vy[k];
            bit_l[k]--;
            if(bit_l[k] == 0 || bit_px[k] < 0.0 || bit_py[k] < 0.0 || bit_px[k] > (double)m_nAppX || bit_py[k] > (double)(m_nAppY - 3))
            {
                bit_c[k] = 0xff000000;
                bit_f[k] = 0;
            } else
            if(bit_p[k] == 0)
            {   
                if((int)(randor() * 2.) == 0)
                    bit_set((int)bit_px[k], (int)bit_py[k], -1);
            } else
            {
                bit_set((int)bit_px[k], (int)bit_py[k], bit_c[k]);
            }
            break;

        case 2: // '\002'
            bit_sy[k] -= 5;
            if((double)bit_sy[k] <= bit_py[k])
            {
                bit_f[k] = 1;
                flag2 = true;
            }
            if((int)(randor() * 20.) == 0)
            {
                int i = (int)(randor() * 2.);
                
                int j = (int)(randor() * 5.);
                bit_set(bit_sx[k] + i, bit_sy[k] + j, -1);
            }
            break;
        }
    }

    if(flag2 && bit_sound > 0)
       PlaySound("firework.wav",0,SND_ASYNC |SND_FILENAME);
}

//---------------------------------------------------------------------------
void __fastcall TForm1::startClick(TObject *Sender)
{
Init();         
}
//---------------------------------------------------------------------------
void __fastcall TForm1::stopClick(TObject *Sender)
{
isStopped = false;
}
//---------------------------------------------------------------------------
double __fastcall TForm1::randor()
{
return (double)rand()/(double) RAND_MAX;
//return (double)random(100)/100.;
}