///<summary>
/// Tries to remove a relationship about rulesB from ownerA's Specific list.
///</summary>
///<param name="ownerA">Owner of the collision rules that will lose an entry in its Specific relationships.</param>
///<param name="rulesB">Collision rules that will be removed from ownerA's Specific relationships.</param>
public static void RemoveRule(ICollisionRulesOwner ownerA, CollisionRules rulesB)
{
if (!ownerA.CollisionRules.specific.Remove(rulesB))
{
rulesB.specific.Remove(ownerA.CollisionRules);
}
}
protected BroadPhaseEntry()
{
CollisionRules = new CollisionRules();
collisionRulesUpdatedDelegate = CollisionRulesUpdated;
hashCode = (int)(base.GetHashCode() * 0xd8163841);
}
///<summary>
/// Tries to remove a relationship about ownerB from rulesA's Specific list.
///</summary>
///<param name="rulesA">Collision rules that will lose an entry in its Specific relationships.</param>
///<param name="ownerB">Owner of the collision rules that will be removed from ownerA's Specific relationships.</param>
public static void RemoveRule(CollisionRules rulesA, ICollisionRulesOwner ownerB)
{
if (!rulesA.specific.Remove(ownerB.CollisionRules))
{
ownerB.CollisionRules.specific.Remove(rulesA);
}
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' personal rules.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetPersonalCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
if (a == null || b == null)
{
return(CollisionRule.Defer);
}
return(a.personal > b.personal ? a.personal : b.personal);
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' specific relationships.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetSpecificCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
CollisionRule aToB;
a.specific.WrappedDictionary.TryGetValue(b, out aToB);
CollisionRule bToA;
b.specific.WrappedDictionary.TryGetValue(a, out bToA);
return(aToB > bToA ? aToB : bToA);
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' collision groups.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetGroupCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
if (a.group == null || b.group == null)
{
return(CollisionRule.Defer); //This can happen occasionally when objects aren't in a space or are being handled uniquely (like in compound bodies).
}
CollisionRule pairRule;
CollisionGroupRules.TryGetValue(new CollisionGroupPair(a.group, b.group), out pairRule);
return(pairRule);
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' specific relationships.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetSpecificCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
if (a == null || b == null || a.specific == null || b.specific == null)
{
return(CollisionRule.Defer);
}
CollisionRule aToB;
a.specific.WrappedDictionary.TryGetValue(b, out aToB);
CollisionRule bToA;
b.specific.WrappedDictionary.TryGetValue(a, out bToA);
return(aToB > bToA ? aToB : bToA);
}
/// <summary>
/// Determines what collision rule governs the interaction between the two objects.
/// </summary>
/// <param name="a">First ruleset in the pair. This entity's space is used to determine the collision detection settings that contain special collision group interaction rules.</param>
/// <param name="b">Second ruleset in the pair.</param>
/// <returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
CollisionRule pairRule = GetSpecificCollisionRuleDefault(a, b);
if (pairRule == CollisionRule.Defer)
{
pairRule = GetPersonalCollisionRuleDefault(a, b);
if (pairRule == CollisionRule.Defer)
{
pairRule = GetGroupCollisionRuleDefault(a, b);
}
}
if (pairRule == CollisionRule.Defer)
{
pairRule = DefaultCollisionRule;
}
return(pairRule);
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' personal rules.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetPersonalCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
return a.personal > b.personal ? a.personal : b.personal;
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' collision groups.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetGroupCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
if (a.group == null || b.group == null)
return CollisionRule.Defer; //This can happen occasionally when objects aren't in a space or are being handled uniquely (like in compound bodies).
CollisionRule pairRule;
CollisionGroupRules.TryGetValue(new CollisionGroupPair(a.group, b.group), out pairRule);
return pairRule;
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' specific relationships.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetSpecificCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
CollisionRule aToB;
a.specific.wrappedDictionary.TryGetValue(b, out aToB);
CollisionRule bToA;
b.specific.wrappedDictionary.TryGetValue(a, out bToA);
return aToB > bToA ? aToB : bToA;
}
/// <summary>
/// Determines what collision rule governs the interaction between the two objects.
/// </summary>
/// <param name="a">First ruleset in the pair. This entity's space is used to determine the collision detection settings that contain special collision group interaction rules.</param>
/// <param name="b">Second ruleset in the pair.</param>
/// <returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
CollisionRule pairRule = GetSpecificCollisionRuleDefault(a, b);
if (pairRule == CollisionRule.Defer)
{
pairRule = GetPersonalCollisionRuleDefault(a, b);
if (pairRule == CollisionRule.Defer)
pairRule = GetGroupCollisionRuleDefault(a, b);
}
if (pairRule == CollisionRule.Defer)
pairRule = DefaultCollisionRule;
return pairRule;
}
///<summary>
/// Tries to remove a relationship about rulesB from ownerA's Specific list.
///</summary>
///<param name="ownerA">Owner of the collision rules that will lose an entry in its Specific relationships.</param>
///<param name="rulesB">Collision rules that will be removed from ownerA's Specific relationships.</param>
public static void RemoveRule(ICollisionRulesOwner ownerA, CollisionRules rulesB)
{
if (!ownerA.CollisionRules.specific.Remove(rulesB))
rulesB.specific.Remove(ownerA.CollisionRules);
}
///<summary>
/// Tries to remove a relationship about ownerB from rulesA's Specific list.
///</summary>
///<param name="rulesA">Collision rules that will lose an entry in its Specific relationships.</param>
///<param name="ownerB">Owner of the collision rules that will be removed from ownerA's Specific relationships.</param>
public static void RemoveRule(CollisionRules rulesA, ICollisionRulesOwner ownerB)
{
if (!rulesA.specific.Remove(ownerB.CollisionRules))
ownerB.CollisionRules.specific.Remove(rulesA);
}
///<summary>
/// Adds an entry in rulesA's Specific relationships list about ownerB.
///</summary>
///<param name="ownerA">Owner of the collision rules that will gain an entry in its Specific relationships.</param>
///<param name="rulesB">Collision rules that will be added to ownerA's Specific relationships.</param>
///<param name="rule">Rule assigned to the pair.</param>
public static void AddRule(ICollisionRulesOwner ownerA, CollisionRules rulesB, CollisionRule rule)
{
ownerA.CollisionRules.specific.Add(rulesB, rule);
}
///<summary>
/// Adds an entry in rulesA's Specific relationships list about ownerB.
///</summary>
///<param name="rulesA">Collision rules that will gain an entry in its Specific relationships.</param>
///<param name="ownerB">Owner of the collision rules that will be added to ownerA's Specific relationships.</param>
///<param name="rule">Rule assigned to the pair.</param>
public static void AddRule(CollisionRules rulesA, ICollisionRulesOwner ownerB, CollisionRule rule)
{
rulesA.specific.Add(ownerB.CollisionRules, rule);
}
/// <summary>
/// Creates a detector volume.
/// </summary>
/// <param name="triangleMesh">Arbitrary closed triangle mesh representing the volume.</param>
/// <param name="queryAccelerator">System used to find nearby objects.</param>
public DetectorVolume(MeshBoundingBoxTreeData triangleMesh, IQueryAccelerator queryAccelerator)
{
TriangleMesh = new TriangleMesh(triangleMesh);
QueryAccelerator = queryAccelerator;
collisionRules = new CollisionRules()
{
group = new CollisionGroup()
};
}
///<summary>
/// Default implementation used to calculate collision rules due to the rulesets' personal rules.
///</summary>
///<param name="a">First ruleset in the pair.</param>
///<param name="b">Second ruleset in the pair.</param>
///<returns>Collision rule governing the interaction between the pair.</returns>
public static CollisionRule GetPersonalCollisionRuleDefault(CollisionRules a, CollisionRules b)
{
return(a.personal > b.personal ? a.personal : b.personal);
}
/// <summary>
/// Constructs a new demo.
/// </summary>
/// <param name="game">Game owning this demo.</param>
public RobotArmDemo(DemosGame game)
: base(game)
{
//Since this is not a "StandardDemo" derived class, we need to set our own gravity.
Space.ForceUpdater.Gravity = new Vector3(0, -9.81f, 0);
Entity ground = new Box(Vector3.Zero, 30, 1, 30);
Space.Add(ground);
var armBase = new Cylinder(new Vector3(0, 2, 0), 2.5f, 1, 40);
Space.Add(armBase);
//The arm base can rotate around the Y axis.
//Rotation is controlled by user input.
groundToBaseJoint = new RevoluteJoint(ground, armBase, Vector3.Zero, Vector3.Up);
groundToBaseJoint.Motor.IsActive = true;
groundToBaseJoint.Motor.Settings.Mode = MotorMode.Servomechanism;
groundToBaseJoint.Motor.Settings.MaximumForce = 3500;
Space.Add(groundToBaseJoint);
Entity lowerArm = new Box(armBase.Position + new Vector3(0, 2, 0), 1, 3, .5f, 10);
Space.Add(lowerArm);
shoulder = new RevoluteJoint(armBase, lowerArm, armBase.Position, Vector3.Forward);
shoulder.Motor.IsActive = true;
shoulder.Motor.Settings.Mode = MotorMode.Servomechanism;
shoulder.Motor.Settings.MaximumForce = 2500;
//Don't want it to rotate too far; this keeps the whole contraption off the ground.
shoulder.Limit.IsActive = true;
shoulder.Limit.MinimumAngle = -MathHelper.PiOver4;
shoulder.Limit.MaximumAngle = MathHelper.PiOver4;
Space.Add(shoulder);
//Make the next piece of the arm.
Entity upperArm = new Cylinder(lowerArm.Position + new Vector3(0, 3, 0), 3, .25f, 10);
Space.Add(upperArm);
//Swivel hinges allow motion around two axes. Imagine a tablet PC's monitor hinge.
elbow = new SwivelHingeJoint(lowerArm, upperArm, lowerArm.Position + new Vector3(0, 1.5f, 0), Vector3.Forward);
elbow.TwistMotor.IsActive = true;
elbow.TwistMotor.Settings.Mode = MotorMode.Servomechanism;
elbow.TwistMotor.Settings.MaximumForce = 1000;
elbow.HingeMotor.IsActive = true;
elbow.HingeMotor.Settings.Mode = MotorMode.Servomechanism;
elbow.HingeMotor.Settings.MaximumForce = 1250;
//Keep it from rotating too much.
elbow.HingeLimit.IsActive = true;
elbow.HingeLimit.MinimumAngle = -MathHelper.PiOver2;
elbow.HingeLimit.MaximumAngle = MathHelper.PiOver2;
Space.Add(elbow);
//Add a menacing claw at the end.
var lowerPosition = upperArm.Position + new Vector3(-.65f, 1.6f, 0);
CollisionRules clawPart1ARules = new CollisionRules();
var bodies = new List<CompoundChildData>()
{
new CompoundChildData() { Entry = new CompoundShapeEntry(new BoxShape(1, .25f, .25f), lowerPosition, 3), CollisionRules = clawPart1ARules },
new CompoundChildData() { Entry = new CompoundShapeEntry(new ConeShape(1, .125f), lowerPosition + new Vector3(-.375f, .4f, 0), 3), Material = new Material(2,2,0) }
};
var claw = new CompoundBody(bodies, 6);
Space.Add(claw);
clawHingeA = new RevoluteJoint(upperArm, claw, upperArm.Position + new Vector3(0, 1.5f, 0), Vector3.Forward);
clawHingeA.Motor.IsActive = true;
clawHingeA.Motor.Settings.Mode = MotorMode.Servomechanism;
clawHingeA.Motor.Settings.Servo.Goal = -MathHelper.PiOver2;
//Weaken the claw to prevent it from crushing the boxes.
clawHingeA.Motor.Settings.Servo.SpringSettings.DampingConstant /= 100;
clawHingeA.Motor.Settings.Servo.SpringSettings.StiffnessConstant /= 100;
clawHingeA.Limit.IsActive = true;
clawHingeA.Limit.MinimumAngle = -MathHelper.PiOver2;
clawHingeA.Limit.MaximumAngle = -MathHelper.Pi / 6;
Space.Add(clawHingeA);
//Add one more claw to complete the contraption.
lowerPosition = upperArm.Position + new Vector3(.65f, 1.6f, 0);
CollisionRules clawPart1BRules = new CollisionRules();
bodies = new List<CompoundChildData>()
{
new CompoundChildData() { Entry = new CompoundShapeEntry(new BoxShape(1, .25f, .25f), lowerPosition, 3), CollisionRules = clawPart1BRules },
new CompoundChildData() { Entry = new CompoundShapeEntry(new ConeShape(1, .125f), lowerPosition + new Vector3(.375f, .4f, 0), 3), Material = new Material(2,2,0) }
};
claw = new CompoundBody(bodies, 6);
Space.Add(claw);
clawHingeB = new RevoluteJoint(upperArm, claw, upperArm.Position + new Vector3(0, 1.5f, 0), Vector3.Forward);
clawHingeB.Motor.IsActive = true;
clawHingeB.Motor.Settings.Mode = MotorMode.Servomechanism;
clawHingeB.Motor.Settings.Servo.Goal = MathHelper.PiOver2;
//Weaken the claw to prevent it from crushing the boxes.
clawHingeB.Motor.Settings.Servo.SpringSettings.DampingConstant /= 100;
clawHingeB.Motor.Settings.Servo.SpringSettings.StiffnessConstant /= 100;
clawHingeB.Limit.IsActive = true;
clawHingeB.Limit.MinimumAngle = MathHelper.Pi / 6;
clawHingeB.Limit.MaximumAngle = MathHelper.PiOver2;
Space.Add(clawHingeB);
//Keep the pieces of the robot from interacting with each other.
//The CollisionRules.AddRule method is just a convenience method that adds items to the 'specific' dictionary.
//Sometimes, it's a little unwieldy to reference the collision rules,
//so the convenience method just takes the owners and hides the ugly syntax.
CollisionRules.AddRule(armBase, lowerArm, CollisionRule.NoBroadPhase);
CollisionRules.AddRule(lowerArm, upperArm, CollisionRule.NoBroadPhase);
CollisionRules.AddRule(clawPart1ARules, upperArm, CollisionRule.NoBroadPhase);
CollisionRules.AddRule(clawPart1BRules, upperArm, CollisionRule.NoBroadPhase);
//Here's an example without a convenience method. Since they are both direct CollisionRules references, it's pretty clean.
clawPart1BRules.Specific.Add(clawPart1ARules, CollisionRule.NoBroadPhase);
//Put some boxes on the ground to try to pick up.
for (double k = 0; k < Math.PI * 2; k += Math.PI / 6)
{
Space.Add(new Box(new Vector3((float)Math.Cos(k) * 5.5f, 2, (float)Math.Sin(k) * 5.5f), 1, 1, 1, 10));
}
game.Camera.Position = new Vector3(0, 5, 13);
}
///<summary>
/// Adds an entry in rulesA's Specific relationships list about ownerB.
///</summary>
///<param name="rulesA">Collision rules that will gain an entry in its Specific relationships.</param>
///<param name="ownerB">Owner of the collision rules that will be added to ownerA's Specific relationships.</param>
///<param name="rule">Rule assigned to the pair.</param>
public static void AddRule(CollisionRules rulesA, ICollisionRulesOwner ownerB, CollisionRule rule)
{
rulesA.specific.Add(ownerB.CollisionRules, rule);
}
///<summary>
/// Adds an entry in rulesA's Specific relationships list about ownerB.
///</summary>
///<param name="ownerA">Owner of the collision rules that will gain an entry in its Specific relationships.</param>
///<param name="rulesB">Collision rules that will be added to ownerA's Specific relationships.</param>
///<param name="rule">Rule assigned to the pair.</param>
public static void AddRule(ICollisionRulesOwner ownerA, CollisionRules rulesB, CollisionRule rule)
{
ownerA.CollisionRules.specific.Add(rulesB, rule);
}