Changeset 9964 in orxonox.OLD for branches/playability/src/world_entities/projectiles/projectile.cc

Timestamp:

Nov 28, 2006, 11:43:26 PM (19 years ago)

Author:

nicolasc

Message:

added dummy guiding/homing function for missile

File:

• branches/playability/src/world_entities/projectiles/projectile.cc (modified) (4 diffs)

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

@@ -23 +23 @@
 #include "model.h"
 #include "sound/resource_sound_buffer.h"
+
+#include <cmath>
 
 #include "debug.h"
@@ -157 +159 @@
 }
 
+
+/**
+ *  this function gets called by tick to calculate the new flight direction
+ *  @param curDirection direction vector
+ *  @param estTargetDir target vector, pointing to where the target will be on hit
+ *  @param angle = tick * turningSpeed
+ *  @return normalized (new) direction vector
+*/
+Vector Projectile::newDirection(Vector curDirection, Vector estTargetDir, float angle)
+{
+  float tmp = angleDeg ( curDirection, estTargetDir);
+  if (tmp == 0) { return curDirection; }
+
+  if( angle >  tmp ) { angle = tmp; }
+
+  //Vector n = curDirection.cross(estTargetDir);
+  //Vector d = n.cross(curDirection);
+  Vector d = curDirection.cross(estTargetDir).cross(curDirection);
+  d.normalize();
+  if( angle == 90) { return d; }
+
+  Vector newDir = curDirection + d *  curDirection.len() * tan (angle);
+  newDir.normalize();
+  return newDir;
+}
+
+
 /**
  * signal tick, time dependent things will be handled here
@@ -163 +192 @@
 void Projectile::tick (float dt)
 {
+  Vector estTargetDir = this->targetPosition + this->targetVelocity * this->eta;
+  //Vector estTargetDir = (this->target.getRelCoor() + this->target.getVelocity()) / this->velocity.len() ;
+  this->velocity = this->newDirection(this->velocity, estTargetDir, this->turningSpeed * dt ) * this->velocity.len();
   Vector v = this->velocity * (dt);
   this->shiftCoor(v);
@@ -179 +211 @@
     this->soundSource.play(this->explosionBuffer);
 }
+