/// <summary>
/// Creates a BoundingSphere from a given model and world matrix.
/// </summary>
/// <param name="model">Model to create BoundingSphere from.</param>
/// <param name="world">Matrix to place BoundingSphere with.</param>
/// <returns></returns>
public static BoundingSphere CreateBoundingSphere(Model model, Matrix world)
{
Matrix[] boneTransforms = new Matrix[model.Bones.Count];
model.CopyAbsoluteBoneTransformsTo(boneTransforms);
BoundingSphere meshSphere, boundingSphere = new BoundingSphere();
for (int i = 0; i < model.Meshes.Count; i++)
{
meshSphere = TransformBoundingSphere(boneTransforms[i], model.Meshes[i].BoundingSphere);
boundingSphere = BoundingSphere.Merge(boundingSphere, meshSphere);
}
return TransformBoundingSphere(world, boundingSphere);
}
public Windmill(VisionContent vContent, Vector3 location)
: base(vContent.LoadEffect("effects/SimpleTextureEffect"))
{
World = Matrix.RotationY(-MathUtil.PiOverTwo)*Matrix.Scaling(0.005f)*Matrix.Translation(location);
_model = vContent.Load<Model>("models/windmill");
_texture = vContent.Load<Texture2D>("textures/windmill_diffuse");
_bones = new Matrix[_model.Bones.Count];
_model.CopyAbsoluteBoneTransformsTo(_bones);
//foreach (var mesh in _model.Meshes)
// foreach (var part in mesh.MeshParts)
// part.Effect = Effect.Effect;
_animation = new ObjectAnimation(new Vector3(0, 875, 0), new Vector3(0, 875, 0),
Vector3.Zero, new Vector3(0, 0, MathUtil.TwoPi),
TimeSpan.FromSeconds(10), true);
}
public static Octree BuildOctree(Model model) {
List<JVector> vertices = new List<JVector>();
List<TriangleVertexIndices> indices = new List<TriangleVertexIndices>();
Matrix[] bones = new Matrix[model.Bones.Count];
model.CopyAbsoluteBoneTransformsTo(bones);
foreach (ModelMesh modelMesh in model.Meshes)
{
JMatrix boneTransform = PhysicsSystem.toJMatrix(bones[modelMesh.ParentBone.Index]);
foreach (ModelMeshPart meshPart in modelMesh.MeshParts)
{
int offset = vertices.Count;
var meshVertices = meshPart.VertexBuffer.Resource.Buffer.GetData<JVector>();
for (int i = 0; i < meshVertices.Length; ++i)
{
JVector.Transform(ref meshVertices[i], ref boneTransform, out meshVertices[i]);
}
vertices.AddRange(meshVertices); // append transformed vertices
// there should DEFINITELY be a check here to ensure that the indices used in the model
// don't exceed 65535 (max short int). If the model doesn't use shorts, then they get cast all weird.
var indexElements = meshPart.IndexBuffer.Resource.GetData<short>();
// Each TriangleVertexIndices holds the indices that constitute a triangle primitive
TriangleVertexIndices[] tvi = new TriangleVertexIndices[indexElements.Length];
for (int i = 0; i <= tvi.Length - 2; i += 3) {
tvi[i].I0 = indexElements[i + 0] + offset;
tvi[i].I1 = indexElements[i + 1] + offset;
tvi[i].I2 = indexElements[i + 2] + offset;
}
indices.AddRange(tvi); // append triangles
}
}
Octree ot = new Octree(vertices, indices);
//ot.BuildOctree(); // (already happens in Octree constructor)
return ot;
}
private static List<JVector> ExtractVertices(Model model) {
List<JVector> vertices = new List<JVector>();
Matrix[] bones = new Matrix[model.Bones.Count];
model.CopyAbsoluteBoneTransformsTo(bones);
foreach (ModelMesh modelMesh in model.Meshes)
{
JMatrix boneTransform = PhysicsSystem.toJMatrix(bones[modelMesh.ParentBone.Index]);
foreach (ModelMeshPart meshPart in modelMesh.MeshParts)
{
int offset = vertices.Count;
var meshVertices = meshPart.VertexBuffer.Resource.Buffer.GetData<JVector>();
for (int i = 0; i < meshVertices.Length; ++i)
{
JVector.Transform(ref meshVertices[i], ref boneTransform, out meshVertices[i]);
}
vertices.AddRange(meshVertices); // append transformed vertices
}
}
return vertices;
}
