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Topic: Turtle Tool (Read 1635 times) |
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Tom Fuerstner
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Turtle Tool
« on: Nov 25th, 2002, 1:18pm » |
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i thought it would be interesting to also use the turtle metapher inside the proce55ing IDE. to accomblish this task i've implemented a basic turtle-class. it works quite well and offers new possibilities especially for teaching. but check it out for yourself !
by, tom
// Turtle 01
// by Tom Fuerstner
// This is a basic implementation
// of a graphic turtle similar to the one
// inside the logo-language
// Created: 20 Nov 2002
class Turtle {
int xcor = width/2;
int ycor = height/2;
int angle = -90;
int heading = 0;
int bg = 151;
boolean penStateUp = true;
boolean visibility = true;
boolean wrapMode = false;
boolean windowMode = false;
boolean fenceMode = false;
color penColor = color(100,100,100);
int penAlpha;
int penWidth;
void forward(int distance) {
int xcor_1, ycor_1;
xcor_1 = xcor;
ycor_1 = ycor;
xcor += distance*cos(radians(angle));
ycor += distance*sin(radians(angle));
if (penStateUp == true) {
translate (xcor,ycor);
} else {
line (xcor_1, ycor_1, xcor, ycor);
}
}
void back(int distance) {
int xcor_1, ycor_1;
xcor_1 = xcor;
ycor_1 = ycor;
xcor -= distance*cos(radians(angle));
ycor -= distance*sin(radians(angle));
if (penStateUp == true) {
translate (xcor,ycor);
} else {
line (xcor_1, ycor_1, xcor, ycor);
}
}
void right(int degree) {
angle += degree;
if (angle >= 360) {
angle -= 360;
}
}
void left(int degree) {
angle -= degree;
if (angle <= 0) {
angle += 360;
}
}
void penup() {
penStateUp = true;
}
void pendown() {
penStateUp = false;
}
void penerase() {
//has to be implemented;
//lower the pen with an eraser tip;
}
void penreverse() {
//has to be implemented;
//lower the pen with reversing ink;
}
void fence() {
//has to be implemented;
//sending the turtle beyond a screen edge;
//will be considered an error;
}
void wrap() {
//has to be implemented;
//make turtle wrap aroung to opposite edge;
//when it goes beyond;
}
void window() {
//has to be implemented;
//make turtle cease to wrap;
}
void home() {
if (penStateUp == true) {
translate (width/2,height/2);
} else {
line (xcor, ycor, width/2, height/2);
}
angle = 180;
heading = 180;
}
void setxy(int x1, int y1) {
if (penStateUp == true) {
translate (x1,y1);
} else {
line (xcor, ycor, x1, y1);
}
xcor = x1;
ycor = y1;
}
void pos() {
println(xcor+" : "+ycor);
}
void setpos(int spx, int spy) {
xcor = spx;
ycor = spy;
}
void setx(int sx) {
xcor = sx;
}
void sety(int sy) {
ycor = sy;
}
void xcor() {
println(xcor);
}
void ycor() {
println(ycor);
}
void setheading(int sh) {
angle = sh;
}
void towards(int tox,int toy) {
//has to be implemented;
}
void pen() {
//outputs a list of pen type and color;
//also this command makes no sense in the context;
// of the proce55ing environment;
}
void pencolor (int pc) {
//outputs the number of the color;
}
void getbg (int gbg) {
// outputs the colornumber of the background;
}
void setbg (int sbg) {
// sets the background to a certain color;
}
void showturtle(boolean st) {
visibility = true;
}
void hideturtle(boolean ht) {
visibility = false;
}
void clearscreen() {
home();
}
void clean() {
//don't know right now wheter this command is useful or not;
}
void square(int sq) {
for (int i= 1;i<128; ++i) {
forward(sq);
right(90);
}
}
}
void setup()
{
int turtleNum = 0;
size(600, 200);
colorMode(HSB, 100);
background(255);
}
void loop()
{
Turtle tom = new Turtle();
tom.pendown();tom = new Turtle();
for (int i= 1;i<128; ++i) {
tom.pendown();
tom.square(30);
tom.forward(100);
tom.back(50);
tom.right(i*10);
}
}
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REAS
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Re: Turtle Tool
« Reply #1 on: Nov 25th, 2002, 5:48pm » |
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oh wow! this is fantastic. it makes my day to see this.
thank you, tom.
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