navcube.java
来自「Applet Name: navCube Applet Source: na」· Java 代码 · 共 551 行
JAVA
551 行
import java.awt.* ;
import java.awt.image.* ;
import java.lang.* ;
import java.util.* ;
import java.net.* ;
import java.applet.*;
class vector{ // SMALL V VECTOR
double i,j,k;
static vector temp = new vector();
public vector(){}
public vector(double x, double y, double z){
i = x;
j = y;
k = z;
}
public vector(double x, double y, double z,boolean normalized){
double t = Math.sqrt(x*x+y*y+z*z);
i = x/t;
j = y/t;
k = z/t;
}
public vector buildVector( vertex vert1, vertex vert2){
i = vert2.xp-vert1.xp;
j = vert2.yp-vert1.yp;
k = vert2.zp-vert1.zp;
return this;
}
public double dot(vector v1){
return v1.i*i+v1.j*j+v1.k*k;
}
public double dot(vertex v1){
return v1.xp*i+v1.yp*j+v1.zp*k;
}
public void cross(vector v1){
temp.i = j*v1.k - k*v1.j;
temp.j = k*v1.i - i*v1.k;
temp.k = i*v1.j - j*v1.i;
i = temp.i;
j = temp.j;
k = temp.k;
}
public void norm(){
double t = Math.sqrt(i*i+j*j+k*k);
i = i/t;
j = j/t;
k = k/t;
}
public void print(){
System.out.println("i:" + i);
System.out.println("j:" + j);
System.out.println("k:" + k);
}
}
class vertex{
static final int MAXV = 100;
static int curV = 0;
static vertex vList[] = new vertex[MAXV]; // VERTEX LIST
double x,y,z;
double xp,yp,zp;
public vertex(double i, double j, double k){
x = i;
y = j;
z = k;
}
// USE THIS CONSTRUCTOR TO ADD TO VERTEX LIST
public vertex(double i,double j, double k, boolean moron){
x = i;
y = j;
z = k;
if (curV < MAXV)
vList[curV++] = this;
}
// CLEAR DATA STRUCTS TO GET READY FOR NEW DATA
static public void reInit(){
vList = new vertex[MAXV];
curV = 0;
}
void transform(Matrix Mtx){
zp = Mtx.M[2]*x+Mtx.M[5]*y+Mtx.M[8]*z;
xp = Mtx.M[0]*x+Mtx.M[3]*y+Mtx.M[6]*z;
yp = Mtx.M[1]*x+Mtx.M[4]*y+Mtx.M[7]*z;
// PERSPECTIVE TRANSFORMS
double div = (1-zp/Mtx.E);
xp = xp/div;
yp = yp/div;
}
}
// LIST OF SURFACES BUILT IN HERE
class face{
static final int MAXF = 50;
static int curF = 0;
static face fList[] = new face[MAXF]; // SURFACE LIST
static vector light = new vector(1,-1,2,true);
int color;
vertex verts[];
static int xList[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
static int yList[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
// max 14 vertices per facets
static vector temp1 = new vector(), temp2 = new vector();
static Color grayTable[];
public face( vertex v1, vertex v2, vertex v3, vertex v4 ){ // FACE IS ADDED TO SURFACE LIST WHEN CALLED
verts = new vertex[5];
verts[0] = v1;
verts[1] = v2;
verts[2] = v3;
verts[3] = v4;
verts[4] = v1;
if(curF < MAXF) fList[curF++] = this;
}
// GET READY FOR NEW DATA
static public void reInit(){ // Clear out all data structures
fList = new face[MAXF];
curF = 0;
vertex.reInit();
if (grayTable == null) {
grayTable = new Color[256];
for( int i = 0; i < 251; i += 5 ) {
grayTable[i] = new Color( i, i, i );
grayTable[i+1] = grayTable[i];
grayTable[i+2] = grayTable[i];
grayTable[i+3] = grayTable[i];
grayTable[i+4] = grayTable[i];
}
grayTable[255] = new Color( 255, 215, 0 );
}
}
// FILLS polygons : can probably be optimized
static void lameFill(vertex lvs[], Graphics g){
int icurrent = 0;
vertex v1;
while (icurrent < 5){
v1 = lvs[icurrent];
xList[icurrent] = ((int)(v1.xp + navCube.MAXX2));
yList[icurrent++] = ((int)(v1.yp + navCube.MAXY2));
}
g.fillPolygon( xList, yList, icurrent-1 );
}
static void affineT(Matrix M){ // TRANSFORM ALL VERTICES WITH M
for(int i = 0; i < vertex.curV; i++)
vertex.vList[i].transform(M);
}
static void shade(){ // HIDDEN SURFACE REMOVAL( MARKS color AS 0 OR 1)
for(int i = 0; i < curF; i++){
temp1.buildVector( fList[i].verts[0], fList[i].verts[1] ).cross( temp2.buildVector( fList[i].verts[1], fList[i].verts[2] ));
temp1.norm();
if (temp1.k < 0) {
fList[i].color = 0 ;
} else {
fList[i].color = (int)( 100+(130*temp1.dot(light)));
if (fList[i].color <= 0) fList[i].color = 1;
}
}
}
void faceColor(Graphics g, Color c) {
g.setColor( c );
}
static void draw(Graphics g){
for(int i = 0; i < curF; i++){
if(fList[i].color > 0){
fList[i].faceColor( g, grayTable[fList[i].color]);
lameFill(fList[i].verts,g);
}
}
}
}
class flag extends face {
Color c;
public flag( Color col, vertex v1, vertex v2, vertex v3, vertex v4 ) {
super( v1, v2, v3, v4 );
c = col;
}
void faceColor( Graphics g, Color col ) {
g.setColor( c );
}
}
class Matrix{
double M[] = new double[9]; // TRANSFORMATION MATRIX
double E = 0; // VIEWER DISTANCE ON Z AXIS
static double T1[] = {0,0,0,0,0,0,0,0,0};
static double T2[] = {0,0,0,0,0,0,0,0,0};
static double T3[] = {0,0,0,0,0,0,0,0,0};
static double Mhat[] = {0,0,0,0,0,0,0,0,0};
public Matrix(){
E = 300;
for (int i = 0; i < 3; i++)
for (int j = 0; j<3; j++)
M[3*i+j] = (i == j) ? 1 : 0;
}
void multM(double T[]){
double acu;
int i, j;
for(i = 0; i < 3; i++)
for(j = 0; j < 3; j++){
acu = 0;
for(int k = 0; k < 3; k++)
acu += M[3*i+k]*T[3*k+j];
Mhat[3*i+j] = acu;
}
System.arraycopy( Mhat, 0, M, 0, 9);
}
void rotX(double r){
double c = Math.cos(r);
double s = Math.sin(r);
T1[0]=1;
T1[4]=c;
T1[5]=s;
T1[7]=-s;
T1[8]=c;
multM(T1);
}
void rotY(double r){
double c = Math.cos(r);
double s = Math.sin(r);
T2[0]=c;
T2[2]=-s;
T2[4]=1;
T2[6]=s;
T2[8]=c;
multM(T2);
}
void rotZ(double r){
double c = Math.cos(r);
double s = Math.sin(r);
T3[0]=c;
T3[1]=s;
T3[3]=-s;
T3[4]=c;
T3[8]=1;
multM(T3);
}
public String toString() {
return "{"+String.valueOf(M[0])+","+String.valueOf(M[1])+","+String.valueOf(M[2])+","+
String.valueOf(M[3])+","+String.valueOf(M[4])+","+String.valueOf(M[5])+","+
String.valueOf(M[6])+","+String.valueOf(M[7])+","+String.valueOf(M[8])+"}" ;
}
}
public class navCube extends java.applet.Applet implements Runnable{
final static int MAXX = 80;
final static int MAXY = 80;
final static int MAXX2 = 40;
final static int MAXY2 = 40;
final static long doubleClickTime = 500;
//Thread kicker = null;
Matrix M = new Matrix();
int X,Y, oldX, oldY ;
long oldTime = -1;
Image im;
Graphics offscreen;
ImageObserver imo = null;
static vertex markFrench = new vertex( 0, 0, 1 );
static vertex markGerman = new vertex( 1, 0, 0 );
static vertex markItalian = new vertex( 0, -1, 0 );
static vertex markEnglish = new vertex( -1, 0, 0 );
static vertex markSpanish = new vertex( 0, 0, -1 );
static vertex markHebrew = new vertex( 0, 1, 0 );
static vector front = new vector( 0, 0, 1 );
String URLTable[] = { "http://www-elec.enst.fr/elec.html", //"French",
"http://www-elec.enst.fr/java.html", //"German",
"http://www-elec.enst.fr/ura.html", //"Spanish",
"http://www-elec.enst.fr/publis.html", //"English",
"http://www-elec.enst.fr/composition.html", //"Italian",
"http://www-elec.enst.fr/ernest.html", //"Hebrew"
};
public void init(){
try {
im = createImage(MAXX, MAXY);
offscreen = im.getGraphics();
} catch (Exception e) {
// double-buffering not available
offscreen = null;
}
resize(MAXX,MAXY);
face.reInit();
// SPECIFY OBJECT HERE :
vertex v1 = new vertex(20,20,20,true);
vertex v2 = new vertex(-20,20,20,true);
vertex v3 = new vertex(-20,-20,20,true);
vertex v4 = new vertex(20,-20,20,true);
vertex v5 = new vertex(20,20,-20,true);
vertex v6 = new vertex(-20,20,-20,true);
vertex v7 = new vertex(-20,-20,-20,true);
vertex v8 = new vertex(20,-20,-20,true);
new face( v5, v8, v7, v6 );
new face( v1, v2, v3, v4 );
new face( v4, v3, v7, v8 );
new face( v5, v6, v2, v1 );
new face( v1, v4, v8, v5 );
new face( v6, v7, v3, v2 );
v1 = new vertex( 6, 9, 20, true);
v2 = new vertex( -6, 9, 20, true);
v3 = new vertex( -6, -9, 20, true);
v4 = new vertex( 6, -9, 20, true);
v5 = new vertex( 18, 9, 20, true);
v6 = new vertex( -18, 9, 20, true);
v7 = new vertex( -18, -9, 20, true);
v8 = new vertex( 18, -9, 20, true);
new flag( Color.white, v1, v2, v3, v4 );
new flag( Color.red, v5, v1, v4, v8 );
new flag( Color.blue, v2, v6, v7, v3 );
v1 = new vertex( 20, 6, 9, true);
v2 = new vertex( 20, -6, 9, true);
v3 = new vertex( 20, -6, -9, true);
v4 = new vertex( 20, 6, -9, true);
v5 = new vertex( 20, 18, 9, true);
v6 = new vertex( 20, -18, 9, true);
v7 = new vertex( 20, -18, -9, true);
v8 = new vertex( 20, 18, -9, true);
new flag( Color.yellow, v1, v2, v3, v4 );
new flag( Color.red, v5, v1, v4, v8 );
new flag( Color.black, v2, v6, v7, v3 );
v1 = new vertex( -9, -20, 6, true);
v2 = new vertex( -9, -20, -6, true);
v3 = new vertex( 9, -20, -6, true);
v4 = new vertex( 9, -20, 6, true);
v5 = new vertex( -9, -20, 18, true);
v6 = new vertex( -9, -20, -18, true);
v7 = new vertex( 9, -20, -18, true);
v8 = new vertex( 9, -20, 18, true);
new flag( Color.white, v1, v2, v3, v4 );
new flag( Color.orange, v5, v1, v4, v8 );
new flag( Color.green, v2, v6, v7, v3 );
v1 = new vertex( 18, -9, -20, true);
v2 = new vertex( -18, -9, -20, true);
v3 = new vertex( 18, -3, -20, true);
v4 = new vertex( -18, -3, -20, true);
v5 = new vertex( 18, 3, -20, true);
v6 = new vertex( -18, 3, -20, true);
v7 = new vertex( 18, 9, -20, true);
v8 = new vertex( -18, 9, -20, true);
new flag( Color.red, v1, v2, v8, v7 );
new flag( Color.yellow, v3, v4, v6, v5 );
v1 = new vertex( -20, -18, 9, true);
v2 = new vertex( -20, 18, 9, true);
v3 = new vertex( -20, 18, -9, true);
v4 = new vertex( -20, -18, -9, true);
v5 = new vertex( -20, -18, -4, true);
v6 = new vertex( -20, 18, -4, true);
v7 = new vertex( -20, 18, -6, true);
v8 = new vertex( -20, -18, -6, true);
new flag( Color.white, v1, v2, v3, v4 );
new flag( Color.red, v5, v6, v7, v8 );
v5 = new vertex( -20, -18, 1, true);
v6 = new vertex( -20, 18, 1, true);
v7 = new vertex( -20, 18, -1, true);
v8 = new vertex( -20, -18, -1, true);
new flag( Color.red, v5, v6, v7, v8 );
v5 = new vertex( -20, -18, 6, true);
v6 = new vertex( -20, 18, 6, true);
v7 = new vertex( -20, 18, 4, true);
v8 = new vertex( -20, -18, 4, true);
new flag( Color.red, v5, v6, v7, v8 );
v5 = new vertex( -20, 0, 0, true);
v6 = new vertex( -20, 0, -9, true);
v7 = new vertex( -20, 18, 0, true);
new flag( Color.blue, v3, v6, v5, v7 );
v1 = new vertex( -9, 20, -18, true);
v2 = new vertex( -9, 20, 18, true);
v3 = new vertex( 9, 20, 18, true);
v4 = new vertex( 9, 20, -18, true);
new flag( Color.white, v1, v2, v3, v4 );
v1 = new vertex( -7, 20, -18, true);
v2 = new vertex( -7, 20, 18, true);
v3 = new vertex( -5, 20, 18, true);
v4 = new vertex( -5, 20, -18, true);
v5 = new vertex( 5, 20, -18, true);
v6 = new vertex( 5, 20, 18, true);
v7 = new vertex( 7, 20, 18, true);
v8 = new vertex( 7, 20, -18, true);
new flag( Color.blue, v5, v6, v7, v8 );
new flag( Color.blue, v1, v2, v3, v4 );
v1 = new vertex( -2, 20, -4, true);
v2 = new vertex( -2, 20, 4, true);
v3 = new vertex( 4, 20, 0, true);
v4 = new vertex( 4, 20, 0, true);
v5 = new vertex( 2, 20, 4, true);
v6 = new vertex( 2, 20, -4, true);
v7 = new vertex( -4, 20, 0, true);
v8 = new vertex( -4, 20, 0, true);
new flag( Color.blue, v5, v6, v7, v8 );
new flag( Color.blue, v1, v2, v3, v4 );
face.affineT(M);
face.shade();
repaint();
}
public void paintApplet(Graphics g){
g.setColor(Color.darkGray);
g.fillRect(0,0,MAXY,MAXX);
face.draw(g); // DRAWS THE FACES
}
public void update(Graphics g) {
paint(g);
}
public void paint(Graphics g) {
M.rotX((oldY-Y)*.03f);
M.rotY((X-oldX)*.03f);
face.affineT(M);
face.shade();
if (offscreen != null) {
// double-buffering available
paintApplet(offscreen);
g.drawImage(im, 0, 0, imo);
} else {
// no double-buffering
paintApplet(g);
}
oldX = X;
oldY = Y;
}
public boolean mouseDown(java.awt.Event evt, int x, int y) {
if (oldTime != -1 && Math.abs(evt.when - oldTime) < doubleClickTime) {
jump();
} else {
oldX = x;
oldY = y;
oldTime = evt.when ;
}
return true ;
}
public boolean mouseDrag(java.awt.Event evt, int x, int y) {
Y = y;
X = x;
repaint();
return true;
}
public void start(){
repaint();
}
public void stop(){
}
public void run(){
}
public void jump() {
markFrench.transform(M);
markGerman.transform(M);
markSpanish.transform(M);
markEnglish.transform(M);
markItalian.transform(M);
markHebrew.transform(M);
int i = 0;
double d = front.dot(markFrench), d1 = front.dot(markGerman);
if (d1 > d) {
i = 1;
d = d1 ;
}
d1 = front.dot(markSpanish);
if (d1 > d) {
i = 2;
d = d1 ;
}
d1 = front.dot(markEnglish);
if (d1 > d) {
i = 3;
d = d1 ;
}
d1 = front.dot(markItalian);
if (d1 > d) {
i = 4;
d = d1 ;
}
d1 = front.dot(markHebrew);
if (d1 > d) {
i = 5;
d = d1 ;
}
try {
getAppletContext().showDocument(new URL( URLTable[i] ));
} catch( Exception e ) {
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}
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