Changeset 10038 in orxonox.OLD for branches/playability/src/world_entities

Timestamp:

Dec 10, 2006, 11:49:38 PM (18 years ago)

Author:

nicolasc

Message:

added some div by zero checkings; problem still exists

File:

• branches/playability/src/world_entities/projectiles/swarm_projectile.cc (modified) (2 diffs)

branches/playability/src/world_entities/projectiles/swarm_projectile.cc

@@ -156 +156 @@
 Vector SwarmProjectile::newDirection(Vector curDirection, Vector estTargetDir, float angle)
 {
+  if (unlikely(curDirection.len() == 0))
+    return curDirection;
   printf("recalculating direction\n");
   float tmp = angleDeg ( curDirection, estTargetDir);
@@ -209 +211 @@
   this->shiftCoor(v);*/
 
+  float projectileVelocity = this->velocity.len();
   if (target != NULL){
-    float tti = this->target->getRelCoor().len() / this->getVelocity().len();
+    float tti;  //Time To Impact
+    float targetVelocity = this->target->getVelocity().len();
+    if (unlikely(projectileVelocity == 0 && targetVelocity == 0)) // TODO calculate this reasonably
+      tti = 1; // we do have a problem....
+    else
+      tti = this->target->getRelCoor().len() / sqrt ( projectileVelocity * projectileVelocity + targetVelocity * targetVelocity);
     Vector estTargetDir = (this->target->getRelCoor() + this->target->getVelocity()) * tti;
     this->velocity = this->newDirection(this->velocity, estTargetDir, this->turningSpeed * time );
   }
   else
-    velocity *= maxVelocity / velocity.len(); // set speed to max
+    if (likely(projectileVelocity != 0))
+      this->velocity *= maxVelocity / projectileVelocity; // set speed to max