162 lines
2.8 KiB
C++
162 lines
2.8 KiB
C++
#include "Editor.hpp"
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//---------------------------------------------------------------
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#define MAX_STRANDS 1
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#define STRAND_PIECES 30
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#define STRAND_LENGTH 5
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#define STRAND_SHIFT 1
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struct Strand
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{
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SLONG X[STRAND_PIECES];
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SLONG Y[STRAND_PIECES];
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SWORD VX[STRAND_PIECES];
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SWORD VY[STRAND_PIECES];
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SWORD Length;
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};
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struct Strand strands[MAX_STRANDS];
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void init_hair(SLONG x,SLONG y,SLONG z)
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{
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SLONG c0,c1;
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for(c0=0;c0<MAX_STRANDS;c0++)
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{
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for (c1=0;c1<STRAND_PIECES;c1++)
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{
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strands[c0].X[c1]=(x+4*c0)<<STRAND_SHIFT;
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strands[c0].Y[c1]=(y+STRAND_LENGTH*c1)<<STRAND_SHIFT;
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strands[c0].VX[c1]=0;
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strands[c0].VY[c1]=0;
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}
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}
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}
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void offset_strand(SLONG c0,SLONG c1,SLONG dx,SLONG dy)
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{
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for (;c1<STRAND_PIECES;c1++)
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{
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strands[c0].X[c1]+=dx;
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strands[c0].X[c1]+=dy;
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}
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}
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inline SLONG normalise_xy(SLONG *dx,SLONG *dy,SLONG size)
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{
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SLONG dist;
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SLONG tx,ty;
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tx=abs(*dx);
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ty=abs(*dy);
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dist=QDIST2(tx,ty);
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if(dist==0)
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dist=1;
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*dx=(*dx*size)/dist;
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*dy=(*dy*size)/dist;
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return(dist);
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}
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void move_hair_root(SLONG gdx,SLONG gdy,SLONG dz)
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{
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SLONG c0,c1;
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SLONG dx,dy;
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for(c0=0;c0<MAX_STRANDS;c0++)
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{
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strands[c0].X[0]+=gdx<<STRAND_SHIFT;
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strands[c0].Y[0]+=gdy<<STRAND_SHIFT;
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for (c1=1;c1<STRAND_PIECES;c1++)
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{
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SLONG dx,dy,vx,vy;
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dx=strands[c0].X[c1]-strands[c0].X[c1-1];
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dy=strands[c0].Y[c1]-strands[c0].Y[c1-1];
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normalise_xy(&dx,&dy,STRAND_LENGTH<<STRAND_SHIFT);
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// strands[c0].VX[c1]+=(gdx>>1)+(strands[c0].VX[c1-1]>>2);
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// strands[c0].VY[c1]+=(gdy>>1)+(strands[c0].VY[c1-1]>>2);
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strands[c0].X[c1]=strands[c0].X[c1-1]+dx;
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strands[c0].Y[c1]=strands[c0].Y[c1-1]+dy;
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}
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}
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}
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void move_hair_velocity(void)
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{
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SLONG c0,c1;
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for(c0=0;c0<MAX_STRANDS;c0++)
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{
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for (c1=1;c1<STRAND_PIECES;c1++)
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{
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SLONG dx,dy;
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strands[c0].VY[c1]+=1;
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strands[c0].X[c1]+=strands[c0].VX[c1];
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strands[c0].Y[c1]+=strands[c0].VY[c1];
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strands[c0].VX[c1]=(strands[c0].VX[c1]*200)>>8;
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strands[c0].VY[c1]=(strands[c0].VY[c1]*200)>>8;
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if(abs(strands[c0].VX[c1])<2)
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strands[c0].VX[c1]=0;
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if(abs(strands[c0].VY[c1])<2)
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strands[c0].VY[c1]=0;
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}
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}
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}
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void draw_hair(void)
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{
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static SLONG old_x=0,old_y=0,old_z=0;
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SLONG dx,dy,dz;
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dz = 0;
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if(old_x==0)
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{
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dx=dy=0;
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}
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else
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{
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dx=MouseX-old_x;
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dy=MouseY-old_y;
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}
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old_x=MouseX;
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old_y=MouseY;
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move_hair_velocity();
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// if(dx||dy)
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move_hair_root(dx,dy,dz);
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{
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SLONG c0,c1;
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for(c0=0;c0<MAX_STRANDS;c0++)
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{
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for (c1=0;c1<STRAND_PIECES-1;c1++)
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{
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CBYTE str[100];
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DrawLineC(strands[c0].X[c1]>>STRAND_SHIFT,strands[c0].Y[c1]>>STRAND_SHIFT,strands[c0].X[c1+1]>>STRAND_SHIFT,strands[c0].Y[c1+1]>>STRAND_SHIFT,255);
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sprintf(str,"%d \n",strands[c0].VX[c1]);
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QuickTextC(0,c1*15,str,255);
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}
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}
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}
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if(Keys[KB_P])
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{
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while(Keys[KB_P])
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{
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}
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}
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}
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//---------------------------------------------------------------
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