/// <summary>
/// Calculates the first occuring collision event on this object's track using the collisionrules.
/// </summary>
internal void CalculateClosestCollision()
{
ClosestCollisionSpeedFraction = float.PositiveInfinity;
//no (more) collision checking this step please
if (SpeedLeft == 0f || Speed == Point.Zero)
{
SpeedLeft = 0f;
return;
}
float touchingSpeedLeftFraction = float.PositiveInfinity;
Point intersectionAxis;
//decide which target of the rules is closest and within collision range
foreach (CollisionRule cRule in CollisionRules)
{
//skip if this rule doesn't have to be checked anyway
if (!cRule.Active)
{
continue;
}
//get collision candidates once if they will be checked (JIT)
if (CollisionCandidates == null && (cRule.Type == CollisionRuleType.Object || cRule.Type == CollisionRuleType.ObjectType || cRule.Type == CollisionRuleType.Objectmap))
{
CollisionCandidates = Game.QuadTree.GetCollisionCandidates(this);
}
switch (cRule.Type)
{
case CollisionRuleType.Shape:
if (Bounds.IntersectsWith((Shape)cRule.Target, Speed, out touchingSpeedLeftFraction, out intersectionAxis) &&
touchingSpeedLeftFraction > 0f &&
touchingSpeedLeftFraction <= SpeedLeft &&
touchingSpeedLeftFraction < ClosestCollisionSpeedFraction)
{
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
ClosestCollisionTouchingAxis = intersectionAxis;
ClosestCollisionRule = cRule;
ClosestCollisionMethodArg = cRule.Target;
ClosestCollisionRelativeSpeed = Speed;
}
break;
case CollisionRuleType.Object:
if (CollisionCandidates.Contains((PhysicalObject)cRule.Target) &&
Bounds.IntersectsWith(((PhysicalObject)cRule.Target).Bounds, Speed - ((PhysicalObject)cRule.Target).Speed, out touchingSpeedLeftFraction, out intersectionAxis) &&
touchingSpeedLeftFraction > 0f &&
touchingSpeedLeftFraction <= SpeedLeft &&
(touchingSpeedLeftFraction <= ((PhysicalObject)cRule.Target).SpeedLeft ||
((PhysicalObject)cRule.Target).Speed == Point.Zero) &&
touchingSpeedLeftFraction < ClosestCollisionSpeedFraction)
{
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
ClosestCollisionTouchingAxis = intersectionAxis;
ClosestCollisionRule = cRule;
ClosestCollisionMethodArg = cRule.Target;
ClosestCollisionRelativeSpeed = Speed - ((PhysicalObject)cRule.Target).Speed;
}
break;
case CollisionRuleType.ObjectType:
foreach (PhysicalObject obj in Resources.PhysicalObjectsByType[(Type)cRule.Target])
{
if (CollisionCandidates.Contains(obj) &&
Bounds.IntersectsWith(obj.Bounds, Speed - obj.Speed, out touchingSpeedLeftFraction, out intersectionAxis) &&
touchingSpeedLeftFraction > 0f &&
touchingSpeedLeftFraction <= SpeedLeft &&
(touchingSpeedLeftFraction <= obj.SpeedLeft ||
obj.Speed == Point.Zero) &&
touchingSpeedLeftFraction < ClosestCollisionSpeedFraction)
{
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
ClosestCollisionTouchingAxis = intersectionAxis;
ClosestCollisionRule = cRule;
ClosestCollisionMethodArg = obj;
ClosestCollisionRelativeSpeed = Speed - obj.Speed;
}
}
break;
case CollisionRuleType.Objectmap:
foreach (PhysicalObject obj in ((Objectmap)cRule.Target).ActivePhysicalObjects)
{
//whether the object should be checked if the filter is enabled
if (!cRule.FilterEnabled || cRule.ObjectmapFilter.Contains(obj.GetType())) //account for inheritance
{
if (CollisionCandidates.Contains(obj) &&
Bounds.IntersectsWith(obj.Bounds, Speed - obj.Speed, out touchingSpeedLeftFraction, out intersectionAxis) &&
touchingSpeedLeftFraction > 0f &&
touchingSpeedLeftFraction <= SpeedLeft &&
(touchingSpeedLeftFraction <= obj.SpeedLeft ||
obj.Speed == Point.Zero) &&
touchingSpeedLeftFraction < ClosestCollisionSpeedFraction)
{
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
ClosestCollisionTouchingAxis = intersectionAxis;
ClosestCollisionRule = cRule;
ClosestCollisionMethodArg = obj;
ClosestCollisionRelativeSpeed = Speed - obj.Speed;
}
}
}
break;
case CollisionRuleType.Spritemap:
foreach (ManagedSprite sprite in ((Spritemap)cRule.Target).ManagedSprites)
{
//whether the object should be checked if the filter is enabled
if (!cRule.FilterEnabled || cRule.SpritemapFilter.Contains(sprite.TargetSprite)) //account for inheritance
{
if (Bounds.IntersectsWith(sprite, Speed, out touchingSpeedLeftFraction, out intersectionAxis) &&
touchingSpeedLeftFraction > 0f &&
touchingSpeedLeftFraction <= SpeedLeft &&
touchingSpeedLeftFraction < ClosestCollisionSpeedFraction)
{
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction;
ClosestCollisionTouchingAxis = intersectionAxis;
ClosestCollisionRule = cRule;
ClosestCollisionMethodArg = sprite;
ClosestCollisionRelativeSpeed = Speed;
}
}
}
break;
}
}
}
/// <summary>
/// Calculates the first occuring collision event on this object's track using the collisionrules.
/// </summary>
internal void CalculateClosestCollision()
{
ClosestCollisionSpeedFraction = float.PositiveInfinity;
//no (more) collision checking this step please
if (SpeedLeft == 0f || Speed == Point.Zero)
{
SpeedLeft = 0f;
return;
}
//decide which target of the rules is closest and within collision range
foreach(CollisionRule cRule in CollisionRules)
{
//skip if this rule doesn't have to be checked anyway
if (!cRule.Active)
continue;
//get collision candidates once if they will be checked (JIT)
if (CollisionCandidates == null && (cRule.Type == CollisionRuleType.Object || cRule.Type == CollisionRuleType.ObjectType || cRule.Type == CollisionRuleType.Objectmap))
CollisionCandidates = Game.QuadTree.GetCollisionCandidates(this);
float touchingSpeedLeftFraction;
Point intersectionAxis;
switch (cRule.Type)
{
case CollisionRuleType.Shape:
if (Bounds.IntersectsWith((Shape)cRule.Target, Speed, out touchingSpeedLeftFraction, out intersectionAxis)
&& touchingSpeedLeftFraction > 0f
&& touchingSpeedLeftFraction <= SpeedLeft
&& touchingSpeedLeftFraction < ClosestCollisionSpeedFraction)
{
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
_closestCollisionTouchingAxis = intersectionAxis;
_closestCollisionRule = cRule;
_closestCollisionMethodArg = cRule.Target;
_closestCollisionRelativeSpeed = Speed;
}
break;
case CollisionRuleType.Object:
if (CollisionCandidates.Contains((PhysicalObject)cRule.Target)
&& Bounds.IntersectsWith(((PhysicalObject)cRule.Target).Bounds, Speed - ((PhysicalObject)cRule.Target).Speed, out touchingSpeedLeftFraction, out intersectionAxis)
&& touchingSpeedLeftFraction > 0f
&& touchingSpeedLeftFraction <= SpeedLeft
&& (touchingSpeedLeftFraction <= ((PhysicalObject)cRule.Target).SpeedLeft
|| ((PhysicalObject)cRule.Target).Speed == Point.Zero)
&& touchingSpeedLeftFraction < ClosestCollisionSpeedFraction)
{
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
_closestCollisionTouchingAxis = intersectionAxis;
_closestCollisionRule = cRule;
_closestCollisionMethodArg = cRule.Target;
_closestCollisionRelativeSpeed = Speed - ((PhysicalObject)cRule.Target).Speed;
}
break;
case CollisionRuleType.ObjectType:
foreach (PhysicalObject obj in Resources.PhysicalObjectsByType[(Type)cRule.Target])
{
if (!CollisionCandidates.Contains(obj) ||
!Bounds.IntersectsWith(obj.Bounds, Speed - obj.Speed, out touchingSpeedLeftFraction, out intersectionAxis) ||
!(touchingSpeedLeftFraction > 0f) || !(touchingSpeedLeftFraction <= SpeedLeft) ||
(!(touchingSpeedLeftFraction <= obj.SpeedLeft) && obj.Speed != Point.Zero) ||
!(touchingSpeedLeftFraction < ClosestCollisionSpeedFraction))
continue;
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
_closestCollisionTouchingAxis = intersectionAxis;
_closestCollisionRule = cRule;
_closestCollisionMethodArg = obj;
_closestCollisionRelativeSpeed = Speed - obj.Speed;
}
break;
case CollisionRuleType.Objectmap:
foreach (PhysicalObject obj in ((GameObjectCollection)cRule.Target).ActivePhysicalObjects)
{
//whether the object should be checked if the filter is enabled
if (!cRule.FilterEnabled || cRule.ObjectmapFilter.Contains(obj.GetType())) //account for inheritance
{
if (!CollisionCandidates.Contains(obj) ||
!Bounds.IntersectsWith(obj.Bounds, Speed - obj.Speed, out touchingSpeedLeftFraction, out intersectionAxis) ||
!(touchingSpeedLeftFraction > 0f) || !(touchingSpeedLeftFraction <= SpeedLeft) ||
(!(touchingSpeedLeftFraction <= obj.SpeedLeft) && obj.Speed != Point.Zero) ||
!(touchingSpeedLeftFraction < ClosestCollisionSpeedFraction))
continue;
ClosestCollisionSpeedFraction = touchingSpeedLeftFraction * SpeedLeft;
_closestCollisionTouchingAxis = intersectionAxis;
_closestCollisionRule = cRule;
_closestCollisionMethodArg = obj;
_closestCollisionRelativeSpeed = Speed - obj.Speed;
}
}
break;
}
}
}
