--- a/src/proto2/Physics.cc	Mon Nov 24 23:13:19 2008 +0000
+++ b/src/proto2/Physics.cc	Fri Nov 28 10:57:10 2008 +0000
@@ -302,17 +302,25 @@
  * referring to the DIRECTIONS table in Physics.hh
  */
 int getDirectionIndex (Vector dir) {
-	int index = 0;
-	if(dir.x < -0.1 || (dir.y > 0.1 && dir.x < 0.1)) {
-		index += 4;
-        }
-	if((dir.x == 1 && dir.y >= 0) || (dir.x == -1 && dir.y <= 0)) {
-		index += 2;
-        }
-	if(dir.x != 0 && dir.y != 0) {
-		index += 1;
-        }
-	return index;
+    if(dir.x == 0 && dir.y == -1) {
+        return 0;
+    } else if(dir.x == 1 && dir.y == -1) {
+        return 1;
+    } else if(dir.x == 1 && dir.y == 0) {
+        return 2;
+    } else if(dir.x == 1 && dir.y == 1) {
+        return 3;
+    } else if(dir.x == 0 && dir.y == 1) {
+        return 4;
+    } else if(dir.x == -1 && dir.y == 1) {
+        return 5;
+    } else if(dir.x == -1 && dir.y == 0) {
+        return 6;
+    } else if(dir.x == -1 && dir.y == -1) {
+        return 7;
+    }
+    Engine::log(DEBUG, "physics.getDirectionIndex ") << "invalid direction: " << dir;
+    return 0;
 }
 
 /**
@@ -326,20 +334,20 @@
 
 	assert(hit != prev);
 	
-	int dirIdx = getDirectionIndex(hit-prev);
+	int dirIdx = getDirectionIndex(prev-hit);
 	float tmp1 = hit.x-prev.x;
 	float tmp2 = hit.y-prev.y;
-	Engine::log(DEBUG, "physics.getNormal ") << dirIdx << " " << tmp1 << " " << tmp2;
+//    Engine::log(DEBUG, "physics.getNormal ") << dirIdx << " " << tmp1 << " " << tmp2;
 
 	for(int i = 1; i <= 2; i++) {
 		if(getType(hit+DIRECTIONS[(dirIdx+i) % 8]) == EMPTY)
 			frees.push_back(DIRECTIONS[(dirIdx+i) % 8]);
-		else
+		else 
 			break;
 	}
 	for(int i = 1; i <= 2; i++) {
-		if(getType(hit+DIRECTIONS[(dirIdx-i) % 8]) == EMPTY)
-			frees.push_back(DIRECTIONS[(dirIdx-i) % 8]);
+		if(getType(hit+DIRECTIONS[(dirIdx-i+8) % 8]) == EMPTY)
+			frees.push_back(DIRECTIONS[(dirIdx-i+8) % 8]);
 		else
 			break;
 	}
@@ -349,6 +357,7 @@
 	for(unsigned int i = 0; i < frees.size(); i++) {
 		normal += frees[i];
 	}
+    Engine::log(DEBUG, "physics.getNormal ") << "normal: " << normal;
 	return normal;
 }