| Upper Directory | | Upper Directory |
////////////////////////////////////////////////////////// /* Bezier Surface, Copyright 2001-2010 Ryoichi Mizuno */ /* ryoichi[at]mizuno.org */ /* Dept. of Complexity Science and Engineering */ /* at The University of Tokyo */ ////////////////////////////////////////////////////////// |
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import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
public class branching extends Applet implements Runnable{
Thread th;
Image buf_i;
Graphics buf_g;
boolean goFlag=true,growFlag=true,lineFlag=true,plineFlag=true,fpolyFlag=true;
int w,h,xp0,yp0,stack,step;
int MAX=100;
double x[]=new double[MAX];
double y[]=new double[MAX];
double z[]=new double[MAX];
int t[]=new int[MAX];
int p[]=new int[MAX];
String str,str_next="";
int phi=25,alpha=32,beta=25,scale=35,stepmax=15,view=0;
//GUI
Button startstop,reset,b_line,b_polyline,b_fillpoly;
public void init(){
//get screen size
w=getSize().width-20;
h=getSize().height-100;
//create buffer layer
buf_i=createImage(w,h);
buf_g=buf_i.getGraphics();
init_values();
//GUI
setLayout(new FlowLayout(1,20,h+30));
add(b_line=new Button("hide"));
add(b_polyline=new Button("hide"));
add(b_fillpoly=new Button("hide"));
add(startstop=new Button("stop"));
add(reset=new Button("reset"));
b_line.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
linectrl();
}
});
b_polyline.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
polylinectrl();
}
});
b_fillpoly.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
fillpolyctrl();
}
});
startstop.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
startstop_p();
}
});
reset.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
reset_p();
}
});
}
public void start(){
th=new Thread(this);
th.start();
}
public void stop(){
goFlag=false;
}
public void run(){
while(goFlag){
repaint();
try{Thread.sleep(750);}
catch(InterruptedException e){}
}
}
public void update(Graphics g){
this.paint(g);
}
public void paint(Graphics g){
//initialize
if(growFlag)step++;
else view+=5;
if(goFlag) draw();
//System.out.println(str);
g.drawImage(buf_i,10,10,this);
if(step>=stepmax)growFlag=false;
//start message
g.drawString("frame",w/2-125,h+75);
g.drawString("polygon",w/2-70,h+75);
g.drawString("filled",w/2-5,h+70);
g.drawString("polygon",w/2-10,h+80);
g.drawString("start",w/2+55,h+70);
g.drawString("/stop",w/2+55,h+80);
g.drawString("initialize",w/2+105,h+75);
}
public void draw(){
init_b();
init_point();
str_next="";
read();
str=str_next;
}
public void init_point(){
x[0]=0; y[0]=0; z[0]=0; t[0]=0; p[0]=45;
xp0=w/2; yp0=0;
}
public void init_values(){
str="A(-5)";
stack=0; step=0;
}
public void init_b(){
buf_g.setColor(Color.white);
buf_g.fillRect(0,0,w,h);
}
public void read(){
int len,now=0,param,endp;
String str_buf;
char type;
//get length of string pn
len=str.length();
//decode string one by one
while(now<len){
type=str.charAt(now);
if(type=='['){
stack++;
x[stack]=x[0]; y[stack]=y[0]; z[stack]=z[0];
t[stack]=t[0]; p[stack]=p[0];
str_next+="[";
}
else if(type==']'){
x[0]=x[stack]; y[0]=y[stack]; z[0]=z[stack];
t[0]=t[stack]; p[0]=p[stack];
stack--;
str_next+="]";
}
else{
now++;
str_buf=str.substring(now+1,len);
endp=str_buf.indexOf(")");
param=java.lang.Integer.parseInt(str_buf.substring(0,endp));
now+=(endp+1);
decode(type,param);
}
now++;
}
}
public void decode(char type,int param){
if(type=='F'){
forward(param);
}
else if(type=='A'){
apex(param);
}
else if(type=='B'){
bud(param);
}
else if(type=='+'){
t[0]=(t[0]+param);
str_next+="+("+param+")";
}
else if(type=='-'){
t[0]=(t[0]-param);
str_next+="-("+param+")";
}
else if(type=='/'){
p[0]=(p[0]+param);
str_next+="/("+param+")";
}
}
public void forward(int r){
double x1,y1,z1;
int xp1,yp1;
x1=x[0]-(double)scale*Math.sin((double)t[0]*Math.PI/180)*Math.cos((double)p[0]*Math.PI/180);
y1=y[0]-(double)scale*Math.sin((double)t[0]*Math.PI/180)*Math.sin((double)p[0]*Math.PI/180);
z1=z[0]+(double)scale*Math.cos((double)t[0]*Math.PI/180);
//start draw line
xp0=(int)((double)w/2+(y[0]*Math.cos(view*Math.PI/180)+x[0]*Math.sin(view*Math.PI/180)));
yp0=(int)((double)h-z[0]);
xp1=(int)((double)w/2+(y1*Math.cos(view*Math.PI/180)+x1*Math.sin(view*Math.PI/180)));
yp1=(int)((double)h-z1);
if(fpolyFlag||plineFlag){
int xpoly[]=new int[4],ypoly[]=new int[4];
double psi;
if(yp1-yp0==0)psi=Math.PI/2;
else if(xp1-xp0==0)psi=0;
else psi=Math.atan((xp1-xp0)/(yp1-yp0)); //[rad.]
xpoly[0]=(int)((double)xp0+(double)r*Math.cos(psi)); ypoly[0]=(int)((double)yp0-(double)r*Math.sin(psi));
xpoly[1]=(int)((double)xp0-(double)r*Math.cos(psi)); ypoly[1]=(int)((double)yp0+(double)r*Math.sin(psi));
xpoly[2]=(int)((double)xp1-(double)(r-1)*Math.cos(psi)); ypoly[2]=(int)((double)yp1+(double)(r-1)*Math.sin(psi));
xpoly[3]=(int)((double)xp1+(double)(r-1)*Math.cos(psi)); ypoly[3]=(int)((double)yp1-(double)(r-1)*Math.sin(psi));
Polygon branch=new Polygon(xpoly,ypoly,4);
if(fpolyFlag){
buf_g.setColor(Color.black);
buf_g.fillPolygon(branch);
}
if(plineFlag){
buf_g.setColor(Color.red);
buf_g.drawPolygon(branch);
}
}
if(lineFlag){
buf_g.setColor(Color.blue);
buf_g.drawLine(xp0,yp0,xp1,yp1);
}
//end draw line
x[0]=x1;
y[0]=y1;
z[0]=z1;
if(growFlag)str_next+="F("+(r+1)+")";
else str_next+="F("+r+")";
}
public void apex(int k){
if(growFlag){
if(k<=0){
str_next+="F(1)A("+(k+1)+")";
}
else{
double prob;
prob=Math.min(1.0,(2*(double)k+1)/Math.pow((double)k,2));
/*if(0.5>Math.random()){
//p1
if(prob>Math.random()){
str_next+="[+("+(-alpha)+")F(1)A("+(k+1)+")]-("+(-beta)+")F(1)A("+(k+1)+")";
}
//p2
else{
str_next+="B(1)-("+(-beta)+")F(1)A("+(k+1)+")";
}
}
else{
//p1
if(prob>Math.random()){
str_next+="[+("+alpha+")F(1)A("+(k+1)+")]-("+beta+")F(1)A("+(k+1)+")";
}
//p2
else{
str_next+="B(1)-("+beta+")F(1)A("+(k+1)+")";
}
}*/
if(0.5>Math.random()){
if(0.5>Math.random()){
//p1
if(prob>Math.random()){
str_next+="/("+phi+")[+("+(-alpha)+")F(1)A("+(k+1)+")]-("+(-beta)+")F(1)A("+(k+1)+")";
}
//p2
else{
str_next+="/("+phi+")B(1)-("+(-beta)+")F(1)A("+(k+1)+")";
}
}
else{
//p1
if(prob>Math.random()){
str_next+="/("+phi+")[+("+alpha+")F(1)A("+(k+1)+")]-("+beta+")F(1)A("+(k+1)+")";
}
//p2
else{
str_next+="/("+phi+")B(1)-("+beta+")F(1)A("+(k+1)+")";
}
}
}
else{
if(0.5>Math.random()){
//p1
if(prob>Math.random()){
str_next+="/("+(-phi)+")[+("+(-alpha)+")F(1)A("+(k+1)+")]-("+(-beta)+")F(1)A("+(k+1)+")";
}
//p2
else{
str_next+="/("+(-phi)+")B(1)-("+(-beta)+")F(1)A("+(k+1)+")";
}
}
else{
//p1
if(prob>Math.random()){
str_next+="/("+(-phi)+")[+("+alpha+")F(1)A("+(k+1)+")]-("+beta+")F(1)A("+(k+1)+")";
}
//p2
else{
str_next+="/("+(-phi)+")B(1)-("+beta+")F(1)A("+(k+1)+")";
}
}
}
}
}
else str_next+="A("+k+")";
}
public void bud(int s){
//start draw circle
xp0=(int)((double)w/2+y[0]);
yp0=(int)((double)h-z[0]);
//buf_g.setColor(Color.green);
//buf_g.fillOval(xp0,yp0,s,s);
//end draw cirle
if(growFlag)str_next+="B("+(s+1)+")";
else str_next+="B("+s+")";
}
public void startstop_p(){
if(goFlag){
goFlag=false;
startstop.setLabel("start");
}
else{
goFlag=true;
start();
startstop.setLabel("stop");
}
}
public void reset_p(){
init_b();
init_point();
init_values();
growFlag=true;
goFlag=false;
startstop.setLabel("start");
startstop_p();
}
public void linectrl(){
if(lineFlag){
lineFlag=false;
b_line.setLabel("show");
}
else{
lineFlag=true;
b_line.setLabel("hide");
}
}
public void polylinectrl(){
if(plineFlag){
plineFlag=false;
b_polyline.setLabel("show");
}
else{
plineFlag=true;
b_polyline.setLabel("hide");
}
}
public void fillpolyctrl(){
if(fpolyFlag){
fpolyFlag=false;
b_fillpoly.setLabel("show");
}
else{
fpolyFlag=true;
b_fillpoly.setLabel("hide");
}
}
}
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