private void Init(TreeSkeleton skeleton)
{
if (skeleton.Leaves.Count == 0)
{
return;
}
Matrix[] transforms = new Matrix[skeleton.Branches.Count];
skeleton.CopyAbsoluteBranchTransformsTo(transforms);
Vector3 center = Vector3.Zero;
for (int i = 0; i < skeleton.Leaves.Count; i++)
{
center += transforms[skeleton.Leaves[i].ParentIndex].Translation;
}
center = center / (float)skeleton.Leaves.Count;
LeafVertex[] vertices = new LeafVertex[skeleton.Leaves.Count * 4];
short[] indices = new short[skeleton.Leaves.Count * 6];
int vindex = 0;
int iindex = 0;
boundingSphere.Center = center;
boundingSphere.Radius = 0.0f;
foreach (TreeLeaf leaf in skeleton.Leaves)
{
// Get the position of the leaf
Vector3 position = transforms[leaf.ParentIndex].Translation + transforms[leaf.ParentIndex].Up * skeleton.Branches[leaf.ParentIndex].Length;
if (skeleton.LeafAxis != null)
{
position += skeleton.LeafAxis.Value * leaf.AxisOffset;
}
// Orientation
Vector2 right = new Vector2((float)Math.Cos(leaf.Rotation), (float)Math.Sin(leaf.Rotation));
Vector2 up = new Vector2(-right.Y, right.X);
// Scale vectors by size
right = leaf.Size.X * right;
up = leaf.Size.Y * up;
// Choose a normal vector for lighting calculations
float distanceFromCenter = Vector3.Distance(position, center);
Vector3 normal = (position - center) / distanceFromCenter; // normalize the normal
// 0---1
// Vertex positions: | \ |
// 3---2
int vidx = vindex;
vertices[vindex++] = new LeafVertex(position, new Vector2(0, 0), -right + up, leaf.Color, leaf.BoneIndex, normal);
vertices[vindex++] = new LeafVertex(position, new Vector2(1, 0), right + up, leaf.Color, leaf.BoneIndex, normal);
vertices[vindex++] = new LeafVertex(position, new Vector2(1, 1), right - up, leaf.Color, leaf.BoneIndex, normal);
vertices[vindex++] = new LeafVertex(position, new Vector2(0, 1), -right - up, leaf.Color, leaf.BoneIndex, normal);
// Add indices
indices[iindex++] = (short)(vidx);
indices[iindex++] = (short)(vidx + 1);
indices[iindex++] = (short)(vidx + 2);
indices[iindex++] = (short)(vidx);
indices[iindex++] = (short)(vidx + 2);
indices[iindex++] = (short)(vidx + 3);
// Update the bounding sphere
float size = leaf.Size.Length() / 2.0f;
boundingSphere.Radius = Math.Max(boundingSphere.Radius, distanceFromCenter + size);
}
// Create the vertex declaration
vdeclaration = new VertexDeclaration(LeafVertex.VertexElements);
// Create the buffers
vbuffer = new VertexBuffer(device, vdeclaration, vertices.Length, BufferUsage.WriteOnly);
vbuffer.SetData <LeafVertex>(vertices);
ibuffer = new IndexBuffer(device, IndexElementSize.SixteenBits, indices.Length, BufferUsage.WriteOnly);
ibuffer.SetData <short>(indices);
// Remember the number of leaves
numleaves = skeleton.Leaves.Count;
}
private void Init(TreeSkeleton skeleton)
{
if (skeleton.Leaves.Count == 0)
return;
var transforms = new Matrix[skeleton.Branches.Count];
skeleton.CopyAbsoluteBranchTransformsTo(transforms);
Vector3 center = Vector3.Zero;
for (int i = 0; i < skeleton.Leaves.Count; i++)
{
center += transforms[skeleton.Leaves[i].ParentIndex].Translation;
}
center = center/(float) skeleton.Leaves.Count;
var vertices = new LeafVertex[skeleton.Leaves.Count*4];
var indices = new short[skeleton.Leaves.Count*6];
int vindex = 0;
int iindex = 0;
boundingSphere.Center = center;
boundingSphere.Radius = 0.0f;
foreach (TreeLeaf leaf in skeleton.Leaves)
{
// Get the position of the leaf
Vector3 position = transforms[leaf.ParentIndex].Translation +
transforms[leaf.ParentIndex].Up*skeleton.Branches[leaf.ParentIndex].Length;
if (skeleton.LeafAxis != null)
{
position += skeleton.LeafAxis.Value*leaf.AxisOffset;
}
// Orientation
var right = new Vector2((float) Math.Cos(leaf.Rotation), (float) Math.Sin(leaf.Rotation));
var up = new Vector2(-right.Y, right.X);
// Scale vectors by size
right = leaf.Size.X*right;
up = leaf.Size.Y*up;
// Choose a normal vector for lighting calculations
float distanceFromCenter = Vector3.Distance(position, center);
Vector3 normal = (position - center)/distanceFromCenter; // normalize the normal
// 0---1
// Vertex positions: | \ |
// 3---2
int vidx = vindex;
vertices[vindex++] = new LeafVertex(position, new Vector2(0, 0), -right + up, leaf.Color, leaf.BoneIndex,
normal);
vertices[vindex++] = new LeafVertex(position, new Vector2(1, 0), right + up, leaf.Color, leaf.BoneIndex,
normal);
vertices[vindex++] = new LeafVertex(position, new Vector2(1, 1), right - up, leaf.Color, leaf.BoneIndex,
normal);
vertices[vindex++] = new LeafVertex(position, new Vector2(0, 1), -right - up, leaf.Color, leaf.BoneIndex,
normal);
// Add indices
indices[iindex++] = (short) (vidx);
indices[iindex++] = (short) (vidx + 1);
indices[iindex++] = (short) (vidx + 2);
indices[iindex++] = (short) (vidx);
indices[iindex++] = (short) (vidx + 2);
indices[iindex++] = (short) (vidx + 3);
// Update the bounding sphere
float size = leaf.Size.Length()/2.0f;
boundingSphere.Radius = Math.Max(boundingSphere.Radius, distanceFromCenter + size);
}
// Create the buffers
vbuffer = new VertexBuffer(device, vertices.Length*LeafVertex.SizeInBytes, BufferUsage.None);
vbuffer.SetData<LeafVertex>(vertices);
ibuffer = new IndexBuffer(device, indices.Length*sizeof (short), BufferUsage.None,
IndexElementSize.SixteenBits);
ibuffer.SetData<short>(indices);
// Create the vertex declaration
vdeclaration = new VertexDeclaration(device, LeafVertex.VertexElements);
// Remember the number of leaves
numleaves = skeleton.Leaves.Count;
}
