200 lines
4.6 KiB
C++
200 lines
4.6 KiB
C++
#include <windows.h>
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#include <math.h>
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#define M_PI 3.14159265358979323846
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extern int (*warand)(void);
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extern void line(unsigned char *fb, int X0, int Y0, int X1, int Y1, int w, int h);
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static double sc_curtime;
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static unsigned int sc_starttime;
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static int __inline myftol(double d)
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{
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int a;
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__asm
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{
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fld d
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fistp a
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mov eax, a
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}
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}
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static void __doscope(int fx, int ipos, double i, double v, double &x, double &y, double &sc_tmp)
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{
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double r,d;
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switch (fx)
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{
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case 0: x=2.0*(i-0.5); y=v*0.5; return;
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case 1:
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x=cos(i*M_PI*3.0+sc_curtime)*(0.5+v*0.2);
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y=sin(i*M_PI*6.0+sc_curtime)*(0.5+v*0.2);
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return;
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case 2:
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r=i*M_PI*128+sc_curtime;
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x=cos(r/(64.0+32.0*cos(sc_curtime*M_PI)))*0.4+sin(r)*0.05;
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y=sin(r/(64.0+32.0*cos(sc_curtime*M_PI)))*0.4+cos(r)*0.05;
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return;
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case 3:
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r=M_PI*cos(sc_curtime*0.5)*2;
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x=cos(r)*0.3+cos(i*M_PI*2)*v*0.5;
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y=sin(r)*0.3+sin(i*M_PI*2)*v*0.5;
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return;
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case 4:
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r=M_PI*cos(sc_curtime*0.5)*2;
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x=cos(r)*0.3+cos(i*M_PI*2)*(1.0+v)*0.23;
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y=sin(r*1.5)*0.3+sin(i*M_PI*2)*(1.0+v)*0.23;
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return;
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case 5:
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y=2.0*(i-0.5);
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x=v*0.5 + 0.4*cos(sc_curtime);
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return;
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case 6:
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d=i+v*0.2;
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r=sc_curtime+i*3.14159*4;
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x=cos(r)*d*0.6;
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y=sin(r)*d*0.6;
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return;
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case 7:
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x=(i-0.5)*2.0;
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y=0.25-0.5*fabs(sin(i*M_PI*4 + sc_curtime)) + v*0.2;
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return;
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case 8:
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r=i*3.14159*2;
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d=sin(r*3)+v*0.5;
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x=cos(sc_curtime+r)*d;
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y=sin(sc_curtime-r)*d;
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return;
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case 9:
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x=2.0*(i-0.5);
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y=v*v*v*0.7;
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return;
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case 10:
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x=cos(i*8)*0.9*sin(sc_curtime);
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y=sin(i*8)*0.5*v;
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return;
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case 11:
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d=i-0.9;
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sc_tmp=sc_tmp+v*0.1;
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x=cos(sc_tmp)*d+sin(sc_tmp)*v+0.3;
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y=sin(sc_tmp)*d-cos(sc_tmp)*v;
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return;
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case 12:
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r=i*8;
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x=cos(r)*0.3+sin(r*(3+cos(sc_curtime*0.5+i*3.0)))*0.2;
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y=sin(r)*0.3+cos(r*(2+2*cos(sc_curtime*0.5+i*3.0)))*0.2;
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return;
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case 13:
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x=v*0.3+sin(i*4*3.14159)*cos(sc_curtime)*0.4;
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y=2.0*(i-0.5);
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return;
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case 14:
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if (!(ipos&3)) x=y=0;
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else
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{
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x=v;
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y=(ipos&8)?1.0:-1.0;
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if (ipos & 4)
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{
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sc_tmp=y;
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y=x;
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x=sc_tmp;
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}
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}
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return;
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case 15:
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x=(ipos&1)?-1:1;
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y=(ipos&30)?0:v;
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return;
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case 16:
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r=ipos * 3.14159 * (0.3);
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x=(0.3+v*0.1)*cos(r);
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y=(0.3+v*0.1)*sin(r);
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return;
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}
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}
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//#define TEST_SCOPE 14
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#define NUM_SC 17
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static unsigned int start;
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#define INTERVAL 5000
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static int curfx[2]={0,NUM_SC},lastfx[2]={0,NUM_SC}, interval_l=INTERVAL;
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static double fxblend, lastfxblend;
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void drawscope(unsigned char *out, int w, int h, unsigned char *visdata)
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{
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double tmp1=0.0;
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double tmp2=0.0;
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double tmp3=0.0;
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double tmp4=0.0;
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int x;
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int lx=0;
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int ly=0;
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double w2=w*65536.0/2.0;
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double h2=h*65536.0/2.0;
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if (!sc_starttime) sc_starttime=GetTickCount();
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sc_curtime=(GetTickCount()-sc_curtime)/1000.0;
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if (GetTickCount()>=start+INTERVAL)
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{
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lastfxblend=fxblend;
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lastfx[0]=curfx[0];
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lastfx[1]=curfx[1];
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start=GetTickCount();
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curfx[0]=warand()%NUM_SC;
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curfx[1]=warand()%NUM_SC;
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interval_l=2500+(warand()&8191);
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if (interval_l > INTERVAL) interval_l=INTERVAL;
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for (x = 0; x < 2; x ++)
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if (curfx[x] == 14 || curfx[x] == 15) curfx[x]=warand()%NUM_SC;
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fxblend=0.25+(warand()&511)/1023.0;
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#ifdef TEST_SCOPE
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curfx[0]=TEST_SCOPE;
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lastfx[0]=curfx[0];
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curfx[1]=NUM_SC;
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lastfx[1]=NUM_SC;
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fxblend=lastfxblend=0.0;
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#endif
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}
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double weight=(double)(GetTickCount()-start)*(1.0/(double)(interval_l));
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if (weight > 1.0) weight=1.0;
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for (x = 0; x < 576; x ++)
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{
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int xp;
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int yp;
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double xof=0.0, yof=0.0;
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double ix=x/576.0;
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double iy=((visdata[x]^128)-128)/127.5;
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__doscope(curfx[0],x,ix,iy,xof,yof,tmp1);
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{
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double xof2=0.0,yof2=0.0;
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__doscope(curfx[1],x,ix,iy,xof2,yof2,tmp3);
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xof=xof*(1.0-fxblend) + xof2*fxblend;
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yof=yof*(1.0-fxblend) + yof2*fxblend;
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}
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{
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double xof2=0.0, yof2=0.0;
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__doscope(lastfx[0],x,ix,iy,xof2,yof2,tmp2);
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{
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double xof3=0.0,yof3=0.0;
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__doscope(lastfx[1],x,ix,iy,xof3,yof3,tmp4);
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xof2=xof2*(1.0-lastfxblend) + xof3*lastfxblend;
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yof2=yof2*(1.0-lastfxblend) + yof3*lastfxblend;
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}
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xof=xof*weight + xof2*(1.0-weight);
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yof=yof*weight + yof2*(1.0-weight);
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}
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xp = myftol(xof * w2 + w2);
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yp = myftol(yof * h2 + h2);
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if (x) line(out,lx,ly,xp,yp,w,h);
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lx=xp;
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ly=yp;
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}
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} |