private Instruction CreateInstructionFor(object target, string velocityMemberName,
object valueBefore, object valueAfter, double timeBetween, double instructionTime,
Type typeOfTarget, Type typeOfValue)
{
Type type = typeof(Instruction <,>).MakeGenericType(typeOfTarget, typeOfValue);
object[] arguments = null;
if (typeOfValue == typeof(float))
{
float difference = (float)valueAfter - (float)valueBefore;
if (InstructionManager.IsRotationMember(InstructionManager.GetStateForVelocity(velocityMemberName)))
{
difference = FlatRedBall.Math.MathFunctions.AngleToAngle((float)valueBefore, (float)valueAfter);
}
arguments = new object[]
{
target,
velocityMemberName,
difference / (float)timeBetween,
instructionTime
};
}
else if (typeOfValue == typeof(double))
{
double difference = (double)valueAfter - (double)valueBefore;
arguments = new object[]
{
target,
velocityMemberName,
difference / (double)timeBetween,
instructionTime
};
}
else if (typeOfValue == typeof(int))
{
int difference = (int)valueAfter - (int)valueBefore;
arguments = new object[]
{
target,
velocityMemberName,
(int)(difference / (double)timeBetween),
instructionTime
};
}
else if (typeOfValue == typeof(long))
{
long difference = ((long)valueAfter - (long)valueBefore);
arguments = new object[]
{
target,
velocityMemberName,
(long)(difference / (double)timeBetween),
instructionTime
};
}
else if (typeOfValue == typeof(byte))
{
byte difference = (byte)((byte)valueAfter - (byte)valueBefore);
arguments = new object[]
{
target,
velocityMemberName,
(byte)(difference / (double)timeBetween),
instructionTime
};
}
else if (typeOfValue == typeof(Vector2))
{
Vector2 range = (Vector2)valueAfter - (Vector2)valueBefore;
range.X /= (float)timeBetween;
range.Y /= (float)timeBetween;
arguments = new object[]
{
target,
velocityMemberName,
range,
instructionTime
};
}
else if (typeOfValue == typeof(Vector3))
{
Vector3 range = (Vector3)valueAfter - (Vector3)valueBefore;
range.X /= (float)timeBetween;
range.Y /= (float)timeBetween;
range.Z /= (float)timeBetween;
arguments = new object[]
{
target,
velocityMemberName,
range,
instructionTime
};
}
else if (typeOfValue == typeof(Vector4))
{
Vector4 range = (Vector4)valueAfter - (Vector4)valueBefore;
range.X /= (float)timeBetween;
range.Y /= (float)timeBetween;
range.Z /= (float)timeBetween;
range.W /= (float)timeBetween;
arguments = new object[]
{
target,
velocityMemberName,
range,
instructionTime
};
}
#if XBOX360
ConstructorInfo ctor = type.GetConstructor(
BindingFlags.Instance | BindingFlags.Public,
null,
new Type[] { typeOfTarget, typeof(string), typeOfValue, typeof(double) },
null);
return((Instruction)ctor.Invoke(arguments));
#else
return((Instruction)Activator.CreateInstance(type, arguments));
#endif
}
public InstructionList CreateVelocityListAtIndex(int keyframeIndex)
{
if (keyframeIndex > Count - 1)
{
// The user passed either the last instruction index or an out-of-bounds index,
// so return an empty list.
return(new InstructionList(0));
}
else
{
#region Get keyframeAtIndex and keyframeAfter
InstructionList keyframeAtIndex = this[keyframeIndex];
InstructionList keyframeAfter = null;
double timeBetween;
if (keyframeIndex == Count - 1)
{
// If it's the last keyframe, use the same keyframe to stop all velocity
keyframeAfter = keyframeAtIndex;
timeBetween = 1; // To prevent NaN values
}
else
{
keyframeAfter = this[keyframeIndex + 1];
timeBetween = keyframeAfter[0].TimeToExecute - keyframeAtIndex[0].TimeToExecute;
}
#endregion
InstructionList instructionList = new InstructionList();
#region Loop through all instructions and create interpolation instructions
for (int i = 0; i < keyframeAtIndex.Count; i++)
{
Instruction instructionAtIndex = keyframeAtIndex[i];
GenericInstruction instructionAtIndexAsGeneric = instructionAtIndex as GenericInstruction;
Type typeOfTarget = instructionAtIndexAsGeneric.Target.GetType();
bool shouldInterpolate =
instructionAtIndexAsGeneric.MemberValueAsObject != null &&
instructionAtIndexAsGeneric != null &&
InstructionManager.HasInterpolatorForType(
instructionAtIndexAsGeneric.MemberValueAsObject.GetType());
string velocityMemberName = InstructionManager.GetVelocityForState(
instructionAtIndexAsGeneric.Member);
if (shouldInterpolate && !string.IsNullOrEmpty(velocityMemberName))
{
Type typeOfValue = instructionAtIndexAsGeneric.MemberValueAsObject.GetType();
//bool hasInterpolated = false;
GenericInstruction instructionAfterAsGeneric = keyframeAfter[i] as GenericInstruction;
if (instructionAfterAsGeneric != null &&
instructionAtIndexAsGeneric.Target == instructionAfterAsGeneric.Target &&
instructionAtIndexAsGeneric.Member == instructionAfterAsGeneric.Member)
{
// We've found the instruction! Create a velocity instruction
Instruction instruction = CreateInstructionFor(
instructionAtIndexAsGeneric.Target,
velocityMemberName,
instructionAtIndexAsGeneric.MemberValueAsObject,
instructionAfterAsGeneric.MemberValueAsObject,
timeBetween,
instructionAtIndexAsGeneric.TimeToExecute,
typeOfTarget,
typeOfValue);
instruction.TimeToExecute = instructionAtIndex.TimeToExecute;
instructionList.Add(instruction);
}
}
// switch on the Type, but can't use a Switch statement
}
#endregion
return(instructionList);
}
}
public void SetState(double time, bool setVelocity)
{
InstructionList keyframeBefore = KeyframeAtOrBefore(time);
InstructionList keyframeAfter = KeyframeAtOrAfter(time);
if (keyframeBefore == null && keyframeAfter == null)
{
return;
}
else if (keyframeBefore == keyframeAfter)
{
keyframeBefore.Execute();
}
else if (keyframeBefore != null && keyframeAfter == null)
{
keyframeBefore.Execute();
}
else if (keyframeAfter != null && keyframeBefore == null)
{
keyframeAfter.Execute();
}
else // the two keyframes are not the same, and neither are null
{
double timeAfter = keyframeAfter[0].TimeToExecute;
double timeBefore = keyframeBefore[0].TimeToExecute;
double range = timeAfter - timeBefore;
double ratioAfter = (time - timeBefore) / range;
double ratioBefore = 1 - ratioAfter;
for (int i = 0; i < keyframeBefore.Count; i++)
{
Instruction instructionBefore = keyframeBefore[i];
GenericInstruction instructionBeforeAsGeneric = instructionBefore as GenericInstruction;
object memberValueAsObject = instructionBeforeAsGeneric.MemberValueAsObject;
// DO MORE HERE
bool shouldInterpolate =
instructionBeforeAsGeneric.MemberValueAsObject != null &&
instructionBeforeAsGeneric != null &&
InstructionManager.HasInterpolatorForType(
instructionBeforeAsGeneric.MemberValueAsObject.GetType());
if (shouldInterpolate)
{
bool hasInterpolated = false;
GenericInstruction instructionAfterAsGeneric =
keyframeAfter[i] as GenericInstruction;
if (instructionAfterAsGeneric != null &&
instructionBeforeAsGeneric.Target == instructionAfterAsGeneric.Target &&
instructionBeforeAsGeneric.Member == instructionAfterAsGeneric.Member)
{
// We've found the instruction! Interpolate!
instructionBeforeAsGeneric.InterpolateBetweenAndExecute(instructionAfterAsGeneric, (float)ratioBefore);
hasInterpolated = true;
}
if (hasInterpolated == false)
{
// for now, fail. Eventually will want to search the entire KeyframeAfter to see if it
// contains a matching instruction for interpolation
throw new NotImplementedException("The keyframes instructions do not match up. Cannot interpolate.");
}
}
else
{
keyframeBefore[i].Execute();
}
}
}
}