Can we bend a line like a curve

Question

i have a line connecting two points and now i have to specify a point on the line so that the line is curved at that point ,can anyone help me in this regard,i am a beginner in java3d.

Answer 1

Use Bezier curves for this purpose
I will give u the code
class Xy -> to plot points x1,y1
class bezier -> to draw the curve
U can call ur codes as
Bezier bz = new Bezier(new XY(23,0),new XY(-3,0),new XY(23,h),new XY(-3,h));
bz.draw(g,45);
this will work
class XY
     public static boolean debug = false;
public XY() {
          local_x = 0;
          local_y = 0;
     public XY(int nx, int ny)
          local_x = nx;
          local_y = ny;
     public XY(XY old)
          local_x = old.x();
          local_y = old.y();
     public int x()
          return local_x;
     public int y()
          return local_y;
     public void multiply ( int x, int y )
          printf("move; from "+local_x+" , "+local_y);
          local_x *= x;
          local_y *= y;
     public void divide ( int x, int y )
          local_x /= x;
          local_y /= y;
          printf(" to "+local_x+" , "+local_y+"\n");
     public void setTime(int t)
     public int x(int t)
          return local_x;
     public int y(int t)
          return local_y;
     public void printf ( String s )
          if ( debug )
               System.out.print ( s );
     protected int local_x;
     protected int local_y;
class Bezier
     public static final int DEFAULT_NUMBER_STEPS = 15;
     public Bezier ()
          a = b = c = d = null;
          steps = DEFAULT_NUMBER_STEPS;
     public Bezier ( XY start, XY one, XY two, XY end )
          setKnots ( start, one, two, end );
          steps = DEFAULT_NUMBER_STEPS;
     public Bezier ( XY start, XY one, XY two, XY end, int s )
          setKnots ( start, one, two, end );
          steps = s;
     public void setKnots ( XY start, XY one, XY two, XY end )
          a = start;
          b = one;
          c = two;
          d = end;
          e = null;
     public void addNext ( XY point, XY control )
          a = d;
          b = e;
          c = null; // 2d - e
          d = point;
          e = control;
     public void draw ( Graphics g, int t )
          float stepSize = 1/(float)steps;
          int ox = getX ( 0, t );
          int oy = getY( 0, t );
          for ( float i = 0; i<1; i+= stepSize )
               int x = getX ( i, t );
               int y = getY ( i, t );
               g.drawLine( ox, oy, x, y);
               ox = x;
               oy = y;
          g.drawLine ( ox, oy, d.x(t), d.y(t) );
     public int getX ( float mu, int t )
          double mum1,mum13,mu3;
          mum1 = 1 - mu;
          mum13 = mum1 * mum1 * mum1;
          mu3 = mu * mu * mu;
          int controlx = 0;
          if ( c != null )
               controlx = c.x(t);
          else if ( e != null )
               controlx = 2*(d.x(t)) - e.x(t);
          double x = mum13*a.x(t) +
          3*mu*mum1*mum1*b.x(t) +
          3*mu*mu*mum1*controlx +
          mu3*d.x(t);
          return (int) x;
     public int getY ( float mu, int t )
          double mum1,mum13,mu3;
          mum1 = 1 - mu;
          mum13 = mum1 * mum1 * mum1;
          mu3 = mu * mu * mu;
          int controly = 0;
          if ( c != null )
               controly = c.y(t);
          else if ( e != null )
               controly = 2*(d.y(t)) - e.y(t);
          double y = mum13*a.y(t) +
                    3*mu*mum1*mum1*b.y(t) +
                    3*mu*mu*mum1*controly +
                    mu3*d.y(t);
          return (int) y;
     int steps;
     XY a;
     XY b;
     XY c;
     XY d;
     XY e;
}