Vector Drawing?

[westloar]

I have imported the following Vec2 class into my project:

http://www.johnloomis.org/ece538/notes/java1/Vec2.java.html

I'm currently playing with the use of vectors as I am new to them.

I can't seem to get the vector to draw using the Vec2.draw() method unless it is left in it's constructed default position (0,0).

This is my code:

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public class Avatar extends Sprite {     protected int hitPoints;     protected int attackTime = 100; //ms    protected int strength;     protected boolean isAttack = false;     Vec2 normal = new Vec2(posX, posY);     public Avatar (int x, int y, int w, int h, int s, int hp, int str){     super(w/2, h/2, w, h, s);     hitPoints = hp;     strength = str;     }     public void moveLeft()     {posX-=step;}     public void moveRight()     {posX+=step;}     public void moveUp()     {posY-=step;}     public void moveDown()     {posY+=step;}     public void attack(){         if(isAttack)         {isAttack = false;}         else         isAttack = true;         System.out.println(normal.length());     }     public void isHit(int str){         hitPoints-=str;         if(hitPoints<= 0){             this.dead();         }//endif    }     public void dead(){         //called when player hp <=0    } @Override public void drawSprite(Graphics g){             if(isAttack){         g.setColor(Color.blue);         g.fillOval(posX - 10, posY - 10, 30, 30);         g.setColor(Color.black);                }         if(isActive()){         g.setColor(Color.orange);         g.fillOval(posX, posY, 10, 10);         g.setColor(Color.black);         }          normal.draw(g); } }

I have checked its length with a print line and it returns two every time but does not draw to the canvas, I called its draw() method last to ensure it is drawn last (on top), but that doesn't seem to make a difference.

Any help would be much appreciated

[DazKins]

For starters i should point out that a normal vector actually represents a direction not a point (however looking over your code i don't think you meant what I'm on about here).

Secondly, I cannot see any thing wrong with the implementation of the drawing except i think the issue is where you position the vector

1	Vec2 normal = new Vec2(posX, posY);

This piece of code is outside the constructor when it should really be inside it like this

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public Avatar (int x, int y, int w, int h, int s, int hp, int str){     super(w/2, h/2, w, h, s);     hitPoints = hp;     strength = str;     normal = new Vec2(posX, posY); }

[kulpae]

I'm not sure, but there seems to be some weird example specific code inside of Vec2.java:

try to replace this in the draw method:

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public void draw(Graphics g) {     int [] iv = convert();     g.fillOval(iv[0]-4,iv[1]-4,9,9); }

with this:

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public void draw(Graphics g) {     g.fillOval(v[0]-4,v[1]-4,9,9); }

don't know what your coordinate system looks like, so can't say if that'll help...