public void Animate(TreeSkeleton skeleton, TreeAnimationState state, float seconds)
{
Matrix[] transforms = new Matrix[skeleton.Bones.Count];
skeleton.CopyAbsoluteBoneTranformsTo(transforms, state.BoneRotations);
for (int i = 0; i < state.BoneRotations.Length; i++)
{
Vector3 dir = Vector3.Transform(Vector3.Up, skeleton.Bones[i].Rotation);
Vector3 windstr = wind.GetWindStrength(Vector3.Zero);
Vector3 axis = Vector3.Cross(dir, windstr);
float strength = axis.Length();
axis.Normalize();
// Move the axis from tree space into branch space
axis = Vector3.TransformNormal(axis, skeleton.Bones[i].InverseReferenceTransform);
// Normalize strength
strength = 1.0f - (float)Math.Exp(-0.01f * strength / skeleton.Bones[i].Stiffness);
Quaternion q = Quaternion.CreateFromAxisAngle(axis, strength * MathHelper.PiOver2);
state.BoneRotations[i] = skeleton.Bones[i].Rotation * q;
}
}
public void Animate(TreeSkeleton skeleton, TreeAnimationState state, float seconds)
{
Matrix[] transforms = new Matrix[skeleton.Bones.Count];
skeleton.CopyAbsoluteBoneTranformsTo(transforms, state.BoneRotations);
for (int i = 0; i < state.BoneRotations.Length; i++)
{
Vector3 dir = Vector3.Transform(Vector3.Up, skeleton.Bones[i].Rotation);
Vector3 windstr = wind.GetWindStrength(Vector3.Zero);
Vector3 axis = Vector3.Cross(dir, windstr);
float strength = axis.Length();
axis.Normalize();
// Move the axis from tree space into branch space
axis = Vector3.TransformNormal(axis, skeleton.Bones[i].InverseReferenceTransform);
// Normalize strength
strength = 1.0f - (float)Math.Exp(-0.01f * strength / skeleton.Bones[i].Stiffness);
Quaternion q = Quaternion.CreateFromAxisAngle(axis, strength * MathHelper.PiOver2);
state.BoneRotations[i] = skeleton.Bones[i].Rotation * q;
}
}
public void Animate(TreeSkeleton skeleton, TreeAnimationState state, GameTime time)
{
float seconds = time.ElapsedGameTime.Milliseconds / 1000.0f;
Animate(skeleton, state, seconds);
}
public void Animate(TreeSkeleton skeleton, TreeAnimationState state, GameTime time)
{
float seconds = time.ElapsedGameTime.Milliseconds / 1000.0f;
Animate(skeleton, state, seconds);
}
