Subject:
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I need help with a method in my class RADAR
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 1 Apr 2007 15:29:48 GMT
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Original-From:
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Juan Antonio BreñaMoral,JAB, www.juanantonio.info <bren@juanantonio.+antispam+info>
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Viewed:
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4222 times
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Hello guys,
Yesterday, started to program with new NXJ realease. Currently I am developing a
Radar Interface using Hitechnics Compass Sensor and Ultrasonic Sensor.
I need your help with 2 methods:
public static int getCoordenateX(int angle,int distance){
float CX;
CX = 0;
//Coordenadas 0 en eje de X;
int initX = 50;
CX = initX+distance * Math.sin(angle * Math.PI/180);
return Math.round(CX);
}
public static int getCoordenateY(int angle,int distance){
float CY;
CY = 0;
//Coordenadas 0 en eje de Y;
int initY = 32;
CY = initY-distance*Math.cos(angle * Math.PI/180);
return Math.round(CX);
}
this methods are used to know the coordenate X and Y to set a pixel in the
interface.
My code is:
//Import NXJ Packages
import java.util.*;
import lejos.nxt.*;
import javax.microedition.lcdui.Graphics;
/*
NXT LCD Dimensions:
Width: 100px; 0-99 -> 50
Height: 64px; 0-63 -> 32
*/
public class RADAR1_1 {
//Draw Radar Interface
public static void drawBackground(Graphics gObj){
gObj.drawArc(50-10, 32-10, 20,20,0,360);
gObj.drawArc(50-20, 32-20, 40,40,0,360);
gObj.drawArc(50-30, 32-30, 60,60,0,360);
//X Axis
for(int i=15;i<=85;i++){
gObj.setPixel(1,i,32);
}
//Y Axis
for(int j=0;j<=64;j++){
gObj.setPixel(1,50,j);
}
gObj.refresh();
}
/*
*
* B C
* * * * *
* * *
* * *
* * *
* * *
* *
* A
*
* A: has compass angle and the coordenates are: 50,32;
* AB: is the ultrasonic sensor value; HIPOTENUSE
* B: 90º
* C: ?
* A+B+C = 180;
*/
public static int getCoordenateX(int angle,int distance){
float CX;
CX = 0;
//Coordenadas 0 en eje de X;
int initX = 50;
CX = initX+distance * Math.sin(angle * Math.PI/180);
return Math.round(CX);
}
/*
public static int getCoordenateY(int angle,int distance){
float CY;
CY = 0;
//Coordenadas 0 en eje de Y;
int initY = 32;
CY = initY-distance*Math.cos(angle * Math.PI/180);
return Math.round(CX);
}
*/
public static void credits(){
LCD.clear();
LCD.drawString("Juan Antonio",0,1);
LCD.drawString("Brenha. Moral",0,2);
LCD.drawString("juanantonio.info",0,3);
LCD.refresh();
}
public static void main(String [] options) throws Exception {
//Instances
Graphics g = new Graphics();
CompassSensor compass = new CompassSensor(SensorPort.S2);
UltrasonicSensor sonic = new UltrasonicSensor(SensorPort.S1);
drawBackground(g);
int value;
value = 0;
int degree;
int distance;
while(!Button.ESCAPE.isPressed()){
value = sonic.getDistance();
distance = value;
if(value <= 20){
Sound.playTone(50, 100);
}
value = (int) compass.getDegreesCartesian();
degree = value;
g.setPixel(1,0,0);
g.refresh();
value = (int)(Runtime.getRuntime().freeMemory());
LCD.drawInt(value,0,7);
//int X;
//double XX;
//X = getCoordenateX(degree, distance);
//X = XX.round();
//LCD.drawInt(X,0,6);
LCD.refresh();
Motor.A.setPower(80);
Motor.A.rotate(15);
//2007/04/01
//If section because NXJ doesn't have Garbaje Collector
if((int)(Runtime.getRuntime().freeMemory()) <= 3000){
break;
}
}
//Stop Gyroscope System
Motor.A.stop();
credits();
Thread.sleep(2000);
}
}
You can see the output in my site: http://www.juanantonio.info/jab_cms.php?id=93
Thanks.
Juan Antonio Breña Moral
www.juanantonio.info
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Message has 2 Replies:
 | | Re: I need help with a method in my class RADAR
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| Currently, My methods runs, but the algorithm doesn run well; //Import NXJ Packages import java.util.*; import lejos.nxt.*; import javax.microedition.l....Graphics; /* NXT LCD Dimensions: Width: 100px; 0-99 -> 50 Height: 64px; 0-63 -> 32 */ public (...) (17 years ago, 1-Apr-07, to lugnet.robotics)
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