added incomplete circle test

RangeApp/circleTests.pde

@@ -0,0 +1,44 @@
+
+import javax.vecmath.Vector2d;
+
+boolean rectCircleIntersect(BoundingBox bb, Point p, float r){
+  if( inBox(p, bb) ){ return true; } //circle center in rect
+  else if(lineIntersectsCircle (bb.x1, bb.y1, bb.x1, bb.y2, p._x, p._y, r)){ return true; }//left:bottom->top
+  else if(lineIntersectsCircle (bb.x1, bb.y2, bb.x2, bb.y2, p._x, p._y, r)){ return true; }//top:left->right
+  else if(lineIntersectsCircle (bb.x2, bb.y1, bb.x2, bb.y2, p._x, p._y, r)){ return true; }//right:bottom->top
+  else if(lineIntersectsCircle (bb.x1, bb.y1, bb.x2, bb.y1, p._x, p._y, r)){ return true; }//bottom: left->right
+  else{ return false; }
+}
+
+boolean lineIntersectsCircle(float a1, float a2, float b1, float b2, float c1, float c2, float r) {
+  Vector2d v = new Vector2d((double)b1-a1, (double)b2-a2);
+  Vector2d c = new Vector2d((double)c1-a1, (double)c2-a2);
+  double dpT = v.dot(c);//numerator of projection
+  double dpB = c.dot(c);//denominator of projection
+  double projScalar = dpT/dpB;//the 
+  double orthX = c1-projScalar*(b1-a1);
+  double orthY = c2-projScalar*(b2-a2);
+  if( !online(0,) ){return true;
+  if( distance(orthX, orthY, (double)c1-a1, (double)c2-a2) < r ) return true;
+return false; 
+}
+
+double distance(double x1, double y1, double x2, double y2){ 
+  float t1 = (float)x2-(float)x1;
+  float t2 = (float)y2-(float)y1;
+  return sqrt(t1*t1+t2*t2);
+}
+
+boolean onLine(double a1, double a2, double b1, double b2, double p1, double p2){//returns true if p is on segment ab
+  if( a1 == b1 ){//vertical line case
+    if( a2<=p2 && p2<=b2 ){ return true; }
+    else { return false; }
+  }
+  else{// a2 == b2 horizontal line case
+    if( a1<=p1 && p1<=b1 ){ return true; }
+    else{ return false; }
+  }
+}
+
+
+