Mf::Vector2 location;
};
-struct WindResistenceForce
+struct ResistanceForce
{
+ explicit ResistanceForce(Mf::Scalar scale = 1.0) :
+ k(scale) {}
+
const Mf::Vector2& operator () (const Mf::LinearState<2>& state)
{
- force = -2.0 * state.velocity;
+ force = -k * state.velocity;
return force;
}
private:
- Mf::Vector2 force;
+ Mf::Vector2 force;
+ Mf::Scalar k;
};
current.mass = 1.0;
current.inverseMass = 1.0 / current.mass;
- // gravity
- current.force = Mf::Vector2(0.0, 000.0);
+ // forces
+ current.force = Mf::Vector2(0.0, 0.0);
current.forces.push_back(SpringForce(Mf::Vector2(500.0, 200.0)));
- current.forces.push_back(WindResistenceForce());
- current.forces.push_back(Mf::LinearState<2>::GravityForce(-2000.0));
+ current.forces.push_back(ResistanceForce(2.0));
+ current.forces.push_back(Mf::LinearState<2>::GravityForce(-1000.0));
// starting position
current.position = Mf::Vector2(64.0, 64.0);
//Mf::euler<State,Derivative>(current, t, dt);
- //current.force = Mf::Vector2(0.0, -2000.0);
- current.force = userForce;
current.integrate(t, dt);
-
animation.update(t, dt);
+
+ Mf::Vector3 center(current.position[0], current.position[1], z);
+ Mf::Vector3 a(current.position[0] - 16.0, current.position[1] - 16.0, z);
+ Mf::Vector3 b(current.position[0] + 16.0, current.position[1] + 16.0, z);
+
+ aabb_.init(a, b);
+ sphere_.init(center, a);
}
}
+bool Character::isInsideAabb(const Mf::Aabb& aabb) const
+{
+ // make sure the entity is fully inside the volume
+ if (!(aabb_.max[0] < aabb.max[0] &&
+ aabb_.min[0] > aabb.min[0] &&
+ aabb_.max[1] < aabb.max[1] &&
+ aabb_.min[1] > aabb.min[1] &&
+ aabb_.max[2] < aabb.max[2] &&
+ aabb_.min[2] > aabb.min[2]))
+ {
+ return false;
+ }
+
+ return true;
+}
+
+int Character::getOctant(const Mf::Aabb& aabb) const
+{
+ int octantNum = -1;
+
+ Mf::Plane::Halfspace halfspace;
+
+ Mf::Plane xy = aabb.getPlaneXY();
+ halfspace = xy.intersects(sphere_);
+ if (halfspace == Mf::Plane::INTERSECT)
+ {
+ halfspace = xy.intersects(aabb_);
+ }
+
+ if (halfspace == Mf::Plane::POSITIVE)
+ {
+ Mf::Plane xz = aabb.getPlaneXZ();
+ halfspace = xz.intersects(sphere_);
+ if (halfspace == Mf::Plane::INTERSECT)
+ {
+ halfspace = xz.intersects(aabb_);
+ }
+
+ if (halfspace == Mf::Plane::POSITIVE)
+ {
+ Mf::Plane yz = aabb.getPlaneYZ();
+ halfspace = yz.intersects(sphere_);
+ if (halfspace == Mf::Plane::INTERSECT)
+ {
+ halfspace = yz.intersects(aabb_);
+ }
+
+ if (halfspace == Mf::Plane::POSITIVE)
+ {
+ octantNum = 2;
+ }
+ else if (halfspace == Mf::Plane::NEGATIVE)
+ {
+ octantNum = 3;
+ }
+ }
+ else if (halfspace == Mf::Plane::NEGATIVE)
+ {
+ Mf::Plane yz = aabb.getPlaneYZ();
+ halfspace = yz.intersects(sphere_);
+ if (halfspace == Mf::Plane::INTERSECT)
+ {
+ halfspace = yz.intersects(aabb_);
+ }
+
+ if (halfspace == Mf::Plane::POSITIVE)
+ {
+ octantNum = 1;
+ }
+ else if (halfspace == Mf::Plane::NEGATIVE)
+ {
+ octantNum = 0;
+ }
+ }
+ }
+ else if (halfspace == Mf::Plane::NEGATIVE)
+ {
+ Mf::Plane xz = aabb.getPlaneXZ();
+ halfspace = xz.intersects(sphere_);
+ if (halfspace == Mf::Plane::INTERSECT)
+ {
+ halfspace = xz.intersects(aabb_);
+ }
+
+ if (halfspace == Mf::Plane::POSITIVE)
+ {
+ Mf::Plane yz = aabb.getPlaneYZ();
+ halfspace = yz.intersects(sphere_);
+ if (halfspace == Mf::Plane::INTERSECT)
+ {
+ halfspace = yz.intersects(aabb_);
+ }
+
+ if (halfspace == Mf::Plane::POSITIVE)
+ {
+ octantNum = 6;
+ }
+ else if (halfspace == Mf::Plane::NEGATIVE)
+ {
+ octantNum = 7;
+ }
+ }
+ else if (halfspace == Mf::Plane::NEGATIVE)
+ {
+ Mf::Plane yz = aabb.getPlaneYZ();
+ halfspace = yz.intersects(sphere_);
+ if (halfspace == Mf::Plane::INTERSECT)
+ {
+ halfspace = yz.intersects(aabb_);
+ }
+
+ if (halfspace == Mf::Plane::POSITIVE)
+ {
+ octantNum = 5;
+ }
+ else if (halfspace == Mf::Plane::NEGATIVE)
+ {
+ octantNum = 4;
+ }
+ }
+ }
+
+ return octantNum;
+}
+
+
/** vim: set ts=4 sw=4 tw=80: *************************************************/