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@ -2,6 +2,7 @@ |
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super class for any enemy in the game |
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a enemy can spawn at a random location along the border of the map |
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a enemy can also calculate the distance and angle to the player |
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5-23-16 |
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*/ |
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package tanks; |
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@ -10,7 +11,7 @@ import javax.swing.JFrame; |
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public class Enemy extends Living |
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{ |
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public Enemy |
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public Enemy() |
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{ |
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super(); |
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} |
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@ -23,7 +24,7 @@ public class Enemy extends Living |
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*/ |
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public void spawn(JFrame frame) |
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{ |
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int temp=(int)(Math.random()*(5)); |
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int temp=(int)(Math.random()*(4)) + 1; |
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if(temp==1) |
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{ |
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y=0; |
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@ -39,7 +40,7 @@ public class Enemy extends Living |
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y=frame.getHeight(); |
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x=(int)(Math.random()*(frame.getWidth()+1)); |
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} |
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else if(temp==4) |
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else |
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{ |
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x=0; |
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y=(int)(Math.random()*(frame.getHeight()+1)); |
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@ -51,11 +52,11 @@ public class Enemy extends Living |
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Used right triangle algebra to determine distance from x,y of enemy |
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to x,y of player. |
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*/ |
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public double distToPlayer(Player p) |
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public double distToPlayer(RotationalElement p) |
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{ |
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double d, a, b; |
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a=Math.abs(x-p.getX()); |
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b=Math.abs(y-p.getY()); |
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a=Math.abs(x-p.x); |
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b=Math.abs(y-p.y); |
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d=Math.sqrt(a*a+b*b); |
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return(d); |
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} |
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@ -65,12 +66,13 @@ public class Enemy extends Living |
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Found lengths of imaginary triangle between player and enemy. |
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Then used inverse trig to determine angle. |
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*/ |
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public double angleToPlayer(Player p) |
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public double angleToPlayer(RotationalElement p) |
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{ |
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double a, b, ang; |
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a=Math.abs(x-p.getX()); |
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b=Math.abs(y-p.getY()); |
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ang=Math.atan(b/a); |
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a=(x-p.x); //doesnt have to me absolute value since using atan2 |
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b=(y-p.y); |
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ang=Math.atan2(b,a); //atan2 prevents divisible by zero errors |
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ang = Math.toDegrees(ang); |
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return(ang); |
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} |
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} |