/// <summary>
/// Performs a bounce collision (a collision which modifies velocity and acceleration), and separates the objects if so.
/// </summary>
/// <param name="sphere">The Sphere to perform collision against.</param>
/// <param name="thisMass">The mass of this instance.</param>
/// <param name="otherMass">Th e mass of the argument cube.</param>
/// <param name="elasticity">The ratio of velocity to preserve.</param>
/// <returns>Whether a collision occurred.</returns>
public bool CollideAgainstBounce(Sphere sphere, float thisMass, float otherMass, float elasticity)
{
#if DEBUG
if (thisMass == 0 && otherMass == 0)
{
throw new ArgumentException("Both masses cannot be 0. For equal masses pick a non-zero value");
}
#endif
if (CollideAgainstMove(sphere, thisMass, otherMass))
{
// Get the relative velocity of this circle to the argument circle:
Vector3 relativeVelocity = new Vector3(
this.TopParent.XVelocity - sphere.TopParent.XVelocity,
this.TopParent.YVelocity - sphere.TopParent.YVelocity,
this.TopParent.ZVelocity - sphere.TopParent.ZVelocity);
#if FRB_MDX
float velocityNormalDotResult = Vector3.Dot(relativeVelocity, LastMoveCollisionReposition);
#else
float velocityNormalDotResult;
Vector3.Dot(ref relativeVelocity, ref LastMoveCollisionReposition, out velocityNormalDotResult);
#endif
if (velocityNormalDotResult >= 0)
{
return(true);
}
#if FRB_MDX
//Vector2 tangentVector = new Vector2((float)mLastCollisionTangent.X, (float)mLastCollisionTangent.Y);
// Perform the bounce if the relative velocity and the tangent are the opposite direction.
Vector3 reverseNormal = -Vector3.Normalize(LastMoveCollisionReposition);
float length = Vector3.Dot(relativeVelocity, reverseNormal);
Vector3 velocityOnNormal = Vector3.Multiply(reverseNormal, length);
#else
Vector3 reverseNormal = -LastMoveCollisionReposition;
reverseNormal.Normalize();
float length = Vector3.Dot(relativeVelocity, reverseNormal);
Vector3 velocityOnNormal;
Vector3.Multiply(ref reverseNormal, length, out velocityOnNormal);
#endif
sphere.TopParent.Velocity.X += (1 + elasticity) * thisMass / (thisMass + otherMass) * velocityOnNormal.X;
sphere.TopParent.Velocity.Y += (1 + elasticity) * thisMass / (thisMass + otherMass) * velocityOnNormal.Y;
sphere.TopParent.Velocity.Z += (1 + elasticity) * thisMass / (thisMass + otherMass) * velocityOnNormal.Z;
this.TopParent.Velocity.X -= (1 + elasticity) * otherMass / (thisMass + otherMass) * velocityOnNormal.X;
this.TopParent.Velocity.Y -= (1 + elasticity) * otherMass / (thisMass + otherMass) * velocityOnNormal.Y;
this.TopParent.Velocity.Z -= (1 + elasticity) * otherMass / (thisMass + otherMass) * velocityOnNormal.Z;
return(true);
}
return(false);
}
/// <summary>
/// Executes the command.
/// Gets a number of segments and divides all selected line elements in equal length segments.
/// </summary>
/// <param name="services">CommandServices object to interact with the system</param>
public override void Run(Canguro.Controller.CommandServices services)
{
List <Item> selection = services.GetSelection();
if (selection.Count == 0)
{
return;
}
List <LineElement> lineList = new List <LineElement>();
foreach (Item item in selection)
{
if (item != null && item is LineElement)
{
lineList.Add((LineElement)item);
}
}
if (lineList.Count == 0)
{
lineList.Add(services.GetLine());
}
int parts = (int)services.GetSingle(Culture.Get("getSplitParts") + " [2-100]");
parts = (parts < 2) ? 2 : (parts > 100) ? 100 : parts;
foreach (LineElement line in lineList)
{
Joint ji = line.I;
Joint jj = line.J;
Joint last = jj;
Microsoft.DirectX.Vector3 v = new Microsoft.DirectX.Vector3(jj.X - ji.X, jj.Y - ji.Y, jj.Z - ji.Z);
v.Multiply(1.0f / parts);
if (parts > 1 && v.LengthSq() > 0)
{
LineElement newLine = line;
for (int i = 0; i < parts - 1; i++)
{
jj = new Joint(ji.X + v.X, ji.Y + v.Y, ji.Z + v.Z);
services.Model.JointList.Add(jj);
newLine = Split(newLine, jj, services.Model);
services.Model.LineList.Add(newLine);
ji = jj;
}
}
}
}
/// <summary>
/// Executes the command.
/// Gets a number of segments and divides all selected line elements in equal length segments.
/// </summary>
/// <param name="services">CommandServices object to interact with the system</param>
public override void Run(Canguro.Controller.CommandServices services)
{
List<Item> selection = services.GetSelection();
if (selection.Count == 0)
return;
List<LineElement> lineList = new List<LineElement>();
foreach (Item item in selection)
if (item != null && item is LineElement)
lineList.Add((LineElement)item);
if (lineList.Count == 0)
lineList.Add(services.GetLine());
int parts = (int)services.GetSingle(Culture.Get("getSplitParts") + " [2-100]");
parts = (parts < 2) ? 2 : (parts > 100) ? 100 : parts;
foreach (LineElement line in lineList)
{
Joint ji = line.I;
Joint jj = line.J;
Joint last = jj;
Microsoft.DirectX.Vector3 v = new Microsoft.DirectX.Vector3(jj.X - ji.X, jj.Y - ji.Y, jj.Z - ji.Z);
v.Multiply(1.0f / parts);
if (parts > 1 && v.LengthSq() > 0)
{
LineElement newLine = line;
for (int i = 0; i < parts - 1; i++)
{
jj = new Joint(ji.X + v.X, ji.Y + v.Y, ji.Z + v.Z);
services.Model.JointList.Add(jj);
newLine = Split(newLine, jj, services.Model);
services.Model.LineList.Add(newLine);
ji = jj;
}
}
}
}
