private void Timer_Tick()
{
double angle = (0.05f * frame) * Math.PI / 180;
var xAxis = new Vector3(1, 0, 0);
var zAxis = new Vector3(0, 0, 1);
var yAxis = new Vector3(0, 1, 0);
var rotation = Matrix.RotationAxis(xAxis, 0);
double angleEach = 0;
int counter = 0;
for (int i = 0; i < NumSegments && i < numBonesInModel; ++i, counter += numSegmentPerBone)
{
if (i == 0)
{
boneInternal[0] = rotation;
}
else
{
var vp = Vector3.Transform(path[counter - numSegmentPerBone], Matrix.RotationAxis(xAxis, (float)angleEach)).ToVector3();
angleEach += angle;
var v = Vector3.Transform(path[counter], Matrix.RotationAxis(xAxis, (float)angleEach)).ToVector3();
var rad = Math.Acos(Vector3.Dot(yAxis, (v - vp).Normalized()));
if (angleEach < 0)
{
rad = -rad;
}
var rot = Matrix.RotationAxis(xAxis, (float)rad);
var trans = Matrix.Translation(v);
boneInternal[i] = rot * trans;
}
}
var newBone = new BoneMatricesStruct()
{
Bones = boneInternal.ToArray()
};
context.Post((o) =>
{
Bones = newBone;
}, null);
if (frame > 40 || frame < -40)
{
direction = !direction;
}
if (direction)
{
++frame;
}
else
{
--frame;
}
}
public MainViewModel()
{
this.Title = "BoneSkin Demo";
this.SubTitle = "WPF & SharpDX";
EffectsManager = new DefaultEffectsManager();
RenderTechnique = EffectsManager[DefaultRenderTechniqueNames.Blinn];
this.Camera = new HelixToolkit.Wpf.SharpDX.PerspectiveCamera
{
Position = new Media3D.Point3D(20, 20, 20),
LookDirection = new Media3D.Vector3D(-20, -20, -20),
UpDirection = new Media3D.Vector3D(0, 1, 0)
};
this.Light1Color = Colors.White;
this.Light1Direction = new Media3D.Vector3D(-10, -10, -10);
this.AmbientLightColor = Colors.DarkGray;
SetupCameraBindings(this.Camera);
var builder = new MeshBuilder(true, true, true);
path = new List <Vector3>();
for (int i = 0; i < NumSegments; ++i)
{
path.Add(new Vector3(0, (float)i / 10, 0));
}
builder.AddTube(path, 2, Theta, false, false, true);
Model = builder.ToMesh();
for (int i = 0; i < Model.Positions.Count; ++i)
{
Model.Positions[i] = new Vector3(Model.Positions[i].X, 0, Model.Positions[i].Z);
}
Material = new PhongMaterial()
{
DiffuseColor = Colors.SteelBlue.ToColor4()
};
for (int i = 0; i < numBonesInModel; ++i)
{
boneInternal[i] = Matrix.Identity;
}
Bones = new BoneMatricesStruct()
{
Bones = boneInternal.ToArray()
};
builder = new MeshBuilder(true, true, false);
builder.AddBox(new Vector3(), 40, 0.5, 40, BoxFaces.All);
FloorModel = builder.ToMesh();
int boneId = 0;
numSegmentPerBone = (int)Math.Max(1, (double)Model.Positions.Count / Theta / (numBonesInModel - 1));
int count = 0;
for (int i = 0; i < Model.Positions.Count / Theta; ++i)
{
boneParams.AddRange(Enumerable.Repeat(new BoneIds()
{
Bone1 = Math.Min(numBonesInModel - 1, boneId),
Bone2 = Math.Min(numBonesInModel - 1, boneId - 1),
Bone3 = Math.Min(numBonesInModel - 1, boneId + 1),
Weights = new Vector4(0.6f, 0.2f, 0.2f, 0)
}, Theta));
++count;
if (count == numSegmentPerBone)
{
count = 0;
++boneId;
}
}
VertexBoneParams = boneParams.ToArray();
Instances = new List <Matrix>();
for (int i = 0; i < 3; ++i)
{
Instances.Add(Matrix.Translation(new Vector3(-5 + i * 4, 0, -10)));
}
for (int i = 0; i < 3; ++i)
{
Instances.Add(Matrix.Translation(new Vector3(-5 + i * 4, 0, 0)));
}
for (int i = 0; i < 3; ++i)
{
Instances.Add(Matrix.Translation(new Vector3(-5 + i * 4, 0, 10)));
}
StartAnimation();
}