/// <summary>
/// Use a value in the range 0 to 1.0 to interpolate between min and max rotation, translation and/or scale,
/// then apply this transformation to the given frame's transformation matrix to animate the frame.
/// Record the amount of the change for calculating reaction forces
/// NOTE: Rotation range must be less than 180 degrees, or the slerp will interpolate through the shortest distance,
/// which is the opposite way to the one intended.
/// </summary>
/// <param name="frame">The frame to animate</param>
/// <param name="amount">A value from 0 (min) to 1.0 (max)</param>
public void Transform(JointFrame frame, float amount)
{
Quaternion Rotation = Quaternion.Identity;
Vector3 Translation = Vector3.Empty;
Vector3 Scale = Vector3.Empty;
// Cap the value into range
if (amount>1.0f)
amount = 1.0f;
else if (amount < 0)
amount = 0;
// Record the translation and rotation values before the change, for calculating relative mvt later
Vector3 oldTrans = Translation;
Quaternion oldRot = Rotation;
// Interpolate Translation & store
Translation = (TranslationMax - TranslationMin) * amount + TranslationMin;
// Interpolate scale & store
//Scale = (ScaleMax - ScaleMin) * amount + new Vector3(1,1,1);
Scale = (ScaleMax - ScaleMin) * amount + ScaleMin;
// Interpolate rotation & store
Rotation = Quaternion.Slerp(RotationMin,RotationMax,amount);
Rotation.Invert();
// Do the transform
frame.TransformationMatrix = Matrix.Scaling(Scale)
* Matrix.RotationQuaternion(Rotation)
* Matrix.Translation(Translation);
}
/// <summary>
/// Find the frame in this hierarchy with this BASE name
/// E.g. if name = "JointHead", the first frame called "JointHead*" will be returned.
/// This copes with the fact that TrueSpace and presumably other packages add a number to
/// the end of frame names. So if I call a mesh "Eric", Eric's frame will be called "Eric-0"
/// or some other number, depending on when it was created.
/// In a skinned mesh the bones are called Bone-# by default. MUST rename them to prevent them all having
/// a base name of "Bone"!
/// This method is to allow a frame to be found (e.g. a joint) using a standardised name, e.g. from
/// a Cell's X file.
/// </summary>
/// <param name="root">the root to start searching from</param>
/// <param name="basename">the ROOT name of the frame</param>
/// <returns>the frame of that name, or null if not found</returns>
public static JointFrame FindBaseName(JointFrame root, string basename)
{
// convert string to a valid base name if necessary, then recurse through the hierarchy
return RecursiveFindBaseName(root, BaseName(basename));
}
/// <summary>
/// Read a transformation matrix and attach to the current frame
/// </summary>
/// <param name="node"></param>
/// <param name="depth"></param>
/// <param name="thisFrame"></param>
private static void LoadTransformationMatrix(XFileData node, int depth, JointFrame thisFrame)
{
try
{
// Debug.WriteLine(Depth(depth) + "Creating Matrix for "+thisFrame.Name);
GraphicsStream stream = node.Lock(); // access the data stream
thisFrame.TransformationMatrix = MatrixFromXFile(stream); // read in the matrix
node.Unlock();
}
catch (Exception e)
{
Debug.WriteLine("Error reading transformation matrix: "+e.ToString());
throw;
}
}
/// <summary>
/// Read an AnimationKey node and load its transformation into the given frame
/// </summary>
/// <param name="node"></param>
/// <param name="frame"></param>
private static void LoadKeyframes(XFileData node, JointFrame frame)
{
int keyType = 0, keyFrames = 0;
int keyTime = 0, keyValues = 0;
Quaternion q = new Quaternion();
Vector3 v = new Vector3();
GraphicsStream stream = node.Lock(); // Lock the node and obtain a stream
keyType = (int)stream.Read(keyType.GetType()); // get the keyframe type (rotation, etc.)
keyFrames = (int)stream.Read(keyFrames.GetType()); // get the number of keyframes (should be 2)
if (keyFrames>2) throw new Exception("XFile "+filespec+" should have only two keyframes per animation");
for (int i=0; i<keyFrames; i++)
{
keyTime = (int)stream.Read(keyTime.GetType()); // time of key (ignored)
keyValues = (int)stream.Read(keyValues.GetType()); // number of values in key (ignored)
switch (keyType)
{
// Rotation
case 0:
q = ReadQuaternion(stream); // get the transformation
if (rmin == false) // store it in min or max
{
motion.RotationMin = q; // (min first, then max if min is full)
motion.RotationMax = q; // (fill max too in case no 2nd key)
rmin = true;
}
else
motion.RotationMax = q;
break;
// Translation
case 1:
v = ReadVector(stream);
if (smin == false)
{
motion.ScaleMin = v;
motion.ScaleMax = v;
smin = true;
}
else
motion.ScaleMax = v;
break;
// Scale
case 2:
v = ReadVector(stream);
if (tmin == false)
{
motion.TranslationMin = v;
motion.TranslationMax = v;
tmin = true;
}
else
motion.TranslationMax = v;
break;
}
}
node.Unlock(); // release the node
}
/// <summary>
/// Overload of Attach() to attach a cell to its parent given the actual attachment socket, rather than its name
/// </summary>
/// <param name="parent">the Cell to which I'm connected</param>
/// <param name="skt">the actual socket to which I'm attached</param>
public void Attach(Cell parent, JointFrame skt)
{
parentSocket = skt;
this.parent = parent;
}
/// <summary>
/// Set the visibility level of all meshes of a given type ("SKT", "EFF", etc.)
/// for ALL cells in the system
/// </summary>
/// <param name="meshname">root part of the FRAME name used to designate a part as being an effector/socket/etc</param>
/// <param name="vis">true to make parts of this type visible</param>
public static void SetVisibility(JointFrame.FrameType type, bool vis)
{
for (int i=0; i<Cell.library.Count; i++) // apply to every cell in the library
{
Cell c = (Cell)library.Values[i];
c.RecursiveSetVisibility(c.rootFrame, type, vis);
}
}
/// <summary>
/// Recursively draw the local chemical concentration (in channels with the right affinity)
/// For the Core cell, show the global chemical concs in the func0 to func5 organelles
/// </summary>
/// <param name="frame">frame to draw</param>
/// <param name="lod">level of detail</param>
private void RecursiveDrawScannerMode(JointFrame frame, float lod)
{
int chem = 0;
float brightness = 0;
Color col = Color.White;
try
{
// Render this frame's mesh
Cytoplasm cytoplasm = (Cytoplasm)frame.MeshContainer; // get first Cytoplasm mesh in this frame
while (cytoplasm != null) // for each mesh...
{
switch (frame.Type)
{
// If this is a channel, render it in a colour determined by its chemical preference
// and concentration
case JointFrame.FrameType.Channel:
chem = channel[frame.Index].chemical; // the chemical number for this channel
col = Chemistry.Colour[chem]; // the base colour of that chemical
brightness = GetChannel(frame.Index); // modulate by signal in that channel
if (brightness == 0) brightness = 0.01f; // can't use black, or we'll render using texture
Debug.Assert(brightness >= 0f, "Chemical conc in cell " + fullname + " channel " + frame.Index + " is < 0");
Debug.Assert(brightness <= 1.0f, "Chemical conc in cell " + fullname + " channel " + frame.Index + " is > 1");
col = Color.FromArgb((int)(col.R * brightness),
(int)(col.G * brightness),
(int)(col.B * brightness)); // adjust intensity
cytoplasm.Render(frame, lod, col, col);
break;
// If this is a functional block, render it in yellow
// UNLESS this is the Core cell, in which case we should colour its six func# meshes
// to show the levels of the global chemicals
case JointFrame.FrameType.Function:
if (name == "Core")
{
chem = frame.Index + Chemistry.NUMSIGNALS; // the global chemical number for this func block
col = Chemistry.Colour[chem]; // the base colour of that chemical
brightness = owner.chemistry.Read(chem); // modulate by signal in that channel
if (brightness == 0) brightness = 0.01f; // can't use black, or we'll render using texture
col = Color.FromArgb((int)(col.R * brightness),
(int)(col.G * brightness),
(int)(col.B * brightness)); // adjust intensity
cytoplasm.Render(frame, lod, col, col);
}
// For non-Core cells, render the functional blocks in yellow
else
{
cytoplasm.Render(frame, lod, Color.Yellow, Color.Yellow);
}
break;
// Cell membrane is rendered in wireframe, so that we can see organelles
case JointFrame.FrameType.General:
case JointFrame.FrameType.Animating:
Engine.Device.RenderState.FillMode = FillMode.WireFrame;
cytoplasm.Render(frame, lod, Color.Gray, Color.Gray);
Engine.Device.RenderState.FillMode = FillMode.Solid;
break;
}
// and repeat for any other meshes in frame
cytoplasm = (Cytoplasm)cytoplasm.NextContainer;
}
}
catch (Exception e)
{
throw new SDKException("Error: Unable to render chemical concentrations for celltype " + fullname + " chemical# " + chem + " concentration " + brightness,e);
}
// Render any siblings
if (frame.Sibling != null)
{
RecursiveDrawScannerMode(frame.Sibling, lod);
}
// Render children and their siblings
if (frame.FirstChild != null)
{
RecursiveDrawScannerMode(frame.FirstChild, lod);
}
}
/// <summary>
/// Recursively draw in channel-edit mode
/// </summary>
/// <param name="frame"></param>
/// <param name="lod"></param>
/// <param name="style"></param>
private void RecursiveDrawChannelMode(JointFrame frame, float lod, Cytoplasm.DesignStyle style)
{
try
{
// Render this frame's mesh
Cytoplasm cytoplasm = (Cytoplasm)frame.MeshContainer; // get first Cytoplasm mesh in this frame
while (cytoplasm != null) // for each mesh...
{
switch (frame.Type)
{
// If this is a socket, render it in a colour determined by whether it is selected or not
case JointFrame.FrameType.Socket:
if (frame == Lab.SelectedSocket)
cytoplasm.Render(frame, lod, Color.Red, Color.Red); // selected socket
else if (style != Cytoplasm.DesignStyle.Other)
cytoplasm.Render(frame, lod, Color.White, Color.White); // unselected sockets on selected organism
break;
// If this is a channel, render it in a colour determined by its chemical preference
// And flash it if it is being edited
case JointFrame.FrameType.Channel:
int chem = channel[frame.Index].chemical; // the chemical number for this channel
Color c = Chemistry.Colour[chem]; // the colour of that chemical
if ((this == Lab.SelectedCell) && (Lab.SelectedChannel == frame.Index)) // if we are the channel selected for editing
{
float time = Scene.TotalElapsedTime % 0.3f; // get current fraction of a second
if (time > 0.15f) // flash 1:1
{
//c = Color.DarkGray;
c = Color.FromArgb(c.R / 3, c.G / 3, c.B / 3); // flash between bright and dark versions
}
}
cytoplasm.Render(frame, lod, Color.FromArgb(1,1,1), c); // Use only emissive for clarity. Diffuse is dark (mustn't be black - means ignore)
break;
// If this is a functional block, render it in yellow
case JointFrame.FrameType.Function:
cytoplasm.Render(frame, lod, Color.Yellow, Color.Yellow);
break;
// Cell membrane is rendered in wireframe on a selected creature, so that we can see organelles
case JointFrame.FrameType.General:
case JointFrame.FrameType.Animating:
Engine.Device.RenderState.FillMode = FillMode.WireFrame;
if (style == Cytoplasm.DesignStyle.Selected)
cytoplasm.Render(frame, lod, Color.DarkRed, Color.DarkRed);
else
cytoplasm.Render(frame, lod, Color.DarkGreen, Color.DarkGreen);
Engine.Device.RenderState.FillMode = FillMode.Solid;
break;
}
// and repeat for any other meshes in frame
cytoplasm = (Cytoplasm)cytoplasm.NextContainer;
}
}
catch (Exception e)
{
throw new SDKException("ERROR: Unable to draw organelle " + frame.Name + " in cell " + name, e);
}
// Render any siblings
if (frame.Sibling != null)
{
RecursiveDrawChannelMode(frame.Sibling, lod, style);
}
// Render children and their siblings
if (frame.FirstChild != null)
{
RecursiveDrawChannelMode(frame.FirstChild, lod, style);
}
}
/// <summary>
/// Render the contents of this object's mesh in DESIGN mode
/// in which the material depends on the status of the cell (selected, part of selected org, etc.).
/// Hotspots are also rendered differently depending on whether they are selected, part of the selected cell, etc.
/// </summary>
/// <param name="frame">the frame of reference</param>
/// <param name="lod">level of detail (as dist from camera), for progressive meshes</param>
/// <param name="diffuse">Overridden colour for mesh, or Color.Black to use the mesh's own colour</param>
/// <param name="emissive">Overridden emissive colour for mesh</param>
public void Render(JointFrame frame, float lod, Color diffuse, Color emissive)
{
// If the natural mesh colour is being overridden, set up a material of the given colour
if (diffuse != Color.Black)
{
Material mat = new Material();
mat.Ambient = Color.Black;
mat.Diffuse = diffuse;
mat.Emissive = emissive;
mat.Specular = Color.Black;
Fx.SetMaterial(mat);
}
// set the LOD for the progressive mesh using the dist from camera to obj
// (calculated in Map.RenderQuad())
const float MAXDIST = 180.0f; // use min LOD beyond this dist
const float MINDIST = 40.0f; // use max LOD nearer than this
if (lod > MAXDIST) // TODO: USE LARGE ENOUGH DIST TO ENSURE LAB IS FULLY RENDERED!!!!
MeshData.ProgressiveMesh.NumberFaces = MeshData.ProgressiveMesh.MinFaces;
else
{
int faces = (int)((float)MeshData.ProgressiveMesh.MaxFaces *
(1 - ((lod - MINDIST) / (MAXDIST - MINDIST))));
MeshData.ProgressiveMesh.NumberFaces = faces;
/////Engine.DebugHUD.WriteLine(faces.ToString());
}
// Set up the world matrix
Fx.SetWorldMatrix(frame.CombinedMatrix);
// Render the subsets
for (int i = 0; i < materials.Length; i++)
{
// If this is a selected cell or an unselected cell on the selected org, we already
// have a special material set up. Otherwise, we should use the mesh subset's own material
// so the object is rendered normally
if (diffuse == Color.Black)
{
Fx.SetMaterial(materials[i]);
}
// Use mesh's texture
Fx.SetTexture(textures[i]);
Fx.DrawMeshSubset(MeshData.ProgressiveMesh, i);
}
}
/// <summary>
/// Render the contents of this object's mesh in NORMAL textured mode
/// </summary>
/// <param name="frame">the frame of reference</param>
/// <param name="lod">level of detail (as dist from camera), for progressive meshes</param>
public void Render(JointFrame frame, float lod)
{
// This class of mesh may not currently be visible
if (Visible == false)
return;
// set the LOD for the progressive mesh using the dist from camera to obj
// (calculated in Map.RenderQuad())
const float MAXDIST = 180.0f; // use min LOD beyond this dist
const float MINDIST = 15.0f; // use max LOD nearer than this
if (lod > MAXDIST)
MeshData.ProgressiveMesh.NumberFaces = MeshData.ProgressiveMesh.MinFaces;
else
{
int faces = (int)((float)MeshData.ProgressiveMesh.MaxFaces *
(1 - ((lod - MINDIST) / (MAXDIST - MINDIST))));
MeshData.ProgressiveMesh.NumberFaces = faces;
/////Engine.DebugHUD.WriteLine(faces.ToString());
}
// Set up the world matrix
Fx.SetWorldMatrix(frame.CombinedMatrix);
// Render the subsets
for (int i = 0; i < materials.Length; i++)
{
Fx.SetMaterial(materials[i]);
Fx.SetTexture(textures[i], bumps[i]);
Fx.DrawMeshSubset(MeshData.ProgressiveMesh, i);
}
}
/// <summary>
/// Helper for Cell.HitTest(). Test to see whether these two meshes currently intersect.
/// Method: If all points on one OBB lie in front of any of the planes marking the faces of the other,
/// then the two boxes don't overlap.
/// </summary>
/// <param name="ourFrame">The frame containing one mesh</param>
/// <param name="hisFrame">Same data for other mesh</param>
/// <returns>True if there will be a collision</returns>
public static bool CollisionTest(JointFrame ourFrame, JointFrame hisFrame)
{
// Get the transformed corners for each mesh
Vector3[] ourCorners = ((Cytoplasm)ourFrame.MeshContainer).GetTransformedOBB(ourFrame.CombinedMatrix);
Vector3[] hisCorners = ((Cytoplasm)hisFrame.MeshContainer).GetTransformedOBB(hisFrame.CombinedMatrix);
// Test our points against his planes. If we definitely don't intersect, return false
if (CollisionTest2(ourCorners, hisCorners) == false)
return false;
// If we're still here, the boxes still might intersect, so test his points against our planes
return CollisionTest2(hisCorners, ourCorners);
}
/// <summary>
/// Helper for mouse selection of 3D objects. Given a "finger" pointing into the screen,
/// return the Cell that the finger points to (or null if no such cell).
/// Called by Camera.MousePick()
/// </summary>
/// <param name="rayPosition">position of ray on screen</param>
/// <param name="rayDirection">vector pointing into screen</param>
/// <param name="socket">If a SOCKET on the cell was selected, its frame is returned here</param>
/// <returns>the Cell that the finger points to (or null)</returns>
public static Cell MousePick(Vector3 rayPosition, Vector3 rayDirection, out JointFrame socket)
{
float bestDist = float.MaxValue;
Cell bestCell = null;
socket = null;
// For every organism on the map
foreach (Organism org in root.organismList)
{
// Skip if this is the camera ship - we're inside that so we'd be certain to click on it!
if (org == (Organism)CameraShip.CurrentShip)
continue;
// if finger points somewhere within bounds of this organism
if (Geometry.SphereBoundProbe(org.AbsSphere.Centre, org.AbsSphere.Radius, rayPosition, rayDirection))
{
// Ask the organism to check its cells
Cell cell = org.MousePick(rayPosition, rayDirection, out socket);
// if the ray intersects this cell and it is closer than any previous cell, store it
if (cell != null)
{
float dist = Vector3.Length(cell.AbsSphere.Centre - Camera.Position);
if (dist < bestDist)
bestCell = cell;
}
}
}
// return best candidate cell or null if none found
return bestCell;
}
/// <summary>
/// Recursive part of FindBaseName()
/// </summary>
/// <param name="root"></param>
/// <param name="basename"></param>
/// <returns></returns>
private static JointFrame RecursiveFindBaseName(JointFrame root, string basename)
{
// get the current frame's base name. If we match then return
if (root.Name!=null)
{
string rootbase = BaseName(root.Name);
if (rootbase == basename)
return root;
}
// else continue with rest of hierarchy
if (root.Sibling!=null)
{
JointFrame result = RecursiveFindBaseName(root.Sibling,basename);
if (result!=null)
return result;
}
if (root.FirstChild!=null)
{
JointFrame result = RecursiveFindBaseName(root.FirstChild,basename);
if (result!=null)
return result;
}
return null;
}
private static void RecurseFrameType(FrameType type, JointFrame[] array, JointFrame frame)
{
if (frame.type==type) // if frame is correct type
{
array[frame.index] = frame; // store a ref to it in correct index
}
if (frame.FirstChild!=null) // then recurse through children/siblings
RecurseFrameType(type, array, frame.FirstChild);
if (frame.Sibling!=null)
RecurseFrameType(type, array, frame.Sibling);
}
/// <summary>
/// Search the given frame hierarchy for all frames of a given type (sockets, effectors, etc.).
/// Return an array containing references to these frames, sorted in order, so that
/// "skt0" is in array[0], etc. Used to give cells rapid access to their joints and effectors
/// for physics & animation.
/// Note: array will be no larger than is needed to contain all the named frames. Array may be of zero size but will never be null.
/// If any indices are missing (e.g. anim0 and anim2 exist but not anim1) then the unused array entries will be null
/// and a trace warning will be emitted.
/// </summary>
/// <param name="root">The root frame for the hierarchy</param>
/// <param name="type">The type of frame to return</param>
/// <returns>The array of JointFrames</returns>
public static JointFrame[] IndexFrameType(JointFrame root, FrameType type)
{
int num = 0;
JointFrame[] array = new JointFrame[50]; // A big enough array
RecurseFrameType(type, array, root); // fill the elements
for (num=array.Length; (num>0)&&(array[num-1]==null); num--); // find out how many entries were filled
JointFrame[] array2 = new JointFrame[num]; // copy elements into a correctly-sized array
Array.Copy(array,0,array2,0,num); // (Possibly zero-length)
for (int i=0; i<num; i++) // scan the array for any missing elements and
{ // emit a trace warning - cell designer might have
if (array2[i]==null) // made a mistake!
{
Trace.WriteLine("WARNING: Unable to find a frame of type "+type.ToString()+" with index "+i);
}
}
return array2; // any unused entries will be null
}
/// <summary>
/// Draw a frame and all its child and sibling frames in NORMAL display mode
/// </summary>
/// <param name="frame">Frame to draw</param>
/// <param name="lod"> dist from camera </param>
private void RecursiveDraw(JointFrame frame, float lod)
{
// Render this frame's mesh
Cytoplasm cytoplasm = (Cytoplasm)frame.MeshContainer; // get first Cytoplasm mesh in this frame
while(cytoplasm != null)
{
// if this frame has colour animation, copy the instanced material from the frame to the cytoplasm
if (frame.animColour != null)
cytoplasm.materials = frame.animColour;
cytoplasm.Render(frame, lod); // draw it (textured)
cytoplasm = (Cytoplasm)cytoplasm.NextContainer; // and repeat for any other meshes in frame
}
// Render any siblings
if (frame.Sibling != null)
{
RecursiveDraw(frame.Sibling,lod);
}
// Render children and their siblings
if (frame.FirstChild != null)
{
RecursiveDraw(frame.FirstChild,lod);
}
}
/// <summary>
/// Recursively draw in cell edit mode
/// </summary>
/// <param name="frame"></param>
/// <param name="lod"></param>
/// <param name="style"></param>
private void RecursiveDrawCellMode(JointFrame frame, float lod, Cytoplasm.DesignStyle style)
{
// Render this frame's mesh
Cytoplasm cytoplasm = (Cytoplasm)frame.MeshContainer; // get first Cytoplasm mesh in this frame
while (cytoplasm != null) // for each mesh...
{
switch (frame.Type)
{
// If this is the cell membrane, render it in a colour determined by whether it is selected or not
case JointFrame.FrameType.General:
case JointFrame.FrameType.Animating:
if (style == Cytoplasm.DesignStyle.Selected)
cytoplasm.Render(frame, lod, Color.Blue, Color.Black);
else
cytoplasm.Render(frame, lod, Color.White, Color.Black);
break;
// If this is a socket, render it in a colour determined by whether it is selected or not
case JointFrame.FrameType.Socket:
if (frame == Lab.SelectedSocket)
cytoplasm.Render(frame, lod, Color.Red, Color.Red);
else
cytoplasm.Render(frame, lod, Color.White, Color.White);
break;
// All other parts are unrendered
}
// and repeat for any other meshes in frame
cytoplasm = (Cytoplasm)cytoplasm.NextContainer;
}
// Render any siblings
if (frame.Sibling != null)
{
RecursiveDrawCellMode(frame.Sibling, lod, style);
}
// Render children and their siblings
if (frame.FirstChild != null)
{
RecursiveDrawCellMode(frame.FirstChild, lod, style);
}
}
/// <summary>
/// Given a mouse click, find the cell that has been clicked on
/// </summary>
/// <param name="screenX">the mouse cursor position when the click occurred</param>
/// <param name="screenY"></param>
/// <param name="socket">If a SOCKET on the cell was selected, its frame is returned here</param>
/// <returns>The picked cell, or null if no cell at that point</returns>
public static Cell MousePick(float screenX, float screenY, out JointFrame socket)
{
// Step 1: Convert the mouse position into an eyepoint in 3D
Vector3 v = new Vector3();
screenX -= Camera.SceneViewport.X; // remove offset of viewport
screenY -= Camera.SceneViewport.Y;
v.X = (((2.0f * screenX) / Camera.SceneViewport.Width) - 1) / projMatrix.M11;
v.Y = -(((2.0f * screenY) / Camera.SceneViewport.Height) - 1) / projMatrix.M22;
v.Z = 1.0f;
// Step 2: Create a ray emanating from the mouse cursor in the direction of the camera
Matrix m = viewMatrix;
m.Invert();
Vector3 rayDirection = new Vector3(
v.X * m.M11 + v.Y * m.M21 + v.Z * m.M31,
v.X * m.M12 + v.Y * m.M22 + v.Z * m.M32,
v.X * m.M13 + v.Y * m.M23 + v.Z * m.M33);
Vector3 rayPosition = new Vector3(m.M41, m.M42, m.M43);
// Step 3: Iterate through the orgs and cells to find the nearest one to the camera that our ray intersects
return Map.MousePick(rayPosition, rayDirection, out socket);
}
/// <summary>
/// Construct a new Cell FOR USE IN THE LIBRARY as an archetype
/// - Use Get() to get instances for actual animation and rendering
/// </summary>
/// <param name="name">name of Cell type, in the form "DLLname:celltype.variant" (where .variant is optional)</param>
private Cell(string fullname)
{
// Store the full name so that we can identify our archetype in the library (to remove it when all instances have been disposed)
this.fullname = fullname;
// Parse the group:name.variant into group, name & variant
int colon = fullname.IndexOf(":"); // if the celltype has no : it is in the default DLL
if (colon >= 0)
{
group = fullname.Substring(0, colon); // the first part is the DLL assembly name
name = fullname.Substring(colon + 1); // the second is the class name, plus possible variant
}
else
{
group = "CellTypes";
name = fullname;
}
int dot = name.IndexOf("."); // find start of any variant
if (dot >= 0) // If the name ends in a variant
{
variantName = name;
name = name.Substring(0, dot); // remove it from name
variantName = variantName.Substring(dot+1); // and store it in variant
}
else
{
variantName = "default"; // if no variant specified, use "default.x"
}
// Load the frame hierarchy from disk
rootFrame = CellLoader.Load(group, name, variantName);
// Compute the overall bounding sphere for the cell, now that the frame hierarchy and meshes exist
ComputeBoundingSphere();
// Compute an approximate colour for this cell, for use in optical sensors
ComputeColour();
// Add this Cell to the library (key is complete dll.type name)
library.Add(fullname, this);
}
/// <summary>
/// Helper for mouse selection of 3D objects. Given a "finger" pointing into the screen,
/// return the Cell that the finger points to (or null if no such cell).
/// Also, if the finger is pointing specifically to a SOCKET on that cell, return the socket's frame in the
/// socket variable
/// Called by Map.MousePick()
/// </summary>
/// <param name="rayPosition">position of ray on screen</param>
/// <param name="rayDirection">vector pointing into screen</param>
/// <param name="socket">If a SOCKET on the cell was selected, its frame is returned here</param>
/// <returns>the nearest selected cell or null</returns>
public Cell MousePick(Vector3 rayPosition, Vector3 rayDirection, out JointFrame socket)
{
float bestDist = float.MaxValue;
Cell bestCell = null;
JointFrame bestFrame = null;
foreach (Cell cell in partList)
{
// Unproject the ray and test against every triangle of every mesh
// in the cell. The cost of this is that I have to retain the original Mesh for each Cytoplasm object, since
// its ProgressiveMesh doesn't have an .Intersect() method.
// Return the one (if any) closest to the camera
JointFrame result = cell.MousePick(rayPosition, rayDirection);
if (result != null)
{
float dist = Vector3.Length(cell.AbsSphere.Centre - Camera.Position);
if (dist < bestDist)
{
bestCell = cell;
bestFrame = result;
}
}
}
// If the mesh that was clicked on is a socket, pass the socket frame back to the caller
// If it was a cell but not a socket, pass back a null, because when the cell changes
// we must find a new socket to select
socket = null;
if (bestCell != null)
{
if (bestFrame.Type == JointFrame.FrameType.Socket)
socket = bestFrame;
}
// Return the nearest selected cell or null
return bestCell;
}
private void RecursiveSetVisibility(JointFrame frame, JointFrame.FrameType type, bool vis)
{
if (frame.Type==type) // if we're the right type of frame
if (frame.MeshContainer!=null) // and there's a mesh
((Cytoplasm)frame.MeshContainer).Visible = vis; // set its visibility
if (frame.Sibling != null) // recurse through siblings
RecursiveSetVisibility(frame.Sibling, type, vis);
if (frame.FirstChild != null) // recurse through children
RecursiveSetVisibility(frame.FirstChild, type, vis);
}
private void ComputeBoundingSphere(JointFrame frame, Matrix parentMatrix)
{
// Give the meshes their proper relative positions within the cell
Matrix combinedMatrix = frame.TransformationMatrix * parentMatrix;
// If this frame contains a mesh, transform its bounding sphere and
// combine it with the overall bounds for the cell
if (frame.MeshContainer!=null)
{
Cytoplasm cyt = (Cytoplasm)frame.MeshContainer;
float radius = cyt.BoundRadius;
Vector3 centre = cyt.BoundCentre;
// transform the sphere's centre
centre.TransformCoordinate(combinedMatrix);
// Transform the sphere's radius (to scale it - the original vertices are probably not at their final scale
Vector3 radiusVector = new Vector3(radius, 0, 0); // create a vector of size radius
radiusVector.TransformCoordinate(combinedMatrix); // transform it to rescale it
radius = radiusVector.Length(); // scaled radius is the length of the transformed vector
// Combine this sphere with the others in the cell
RelSphere.CombineBounds(centre, radius);
}
// Now propagate the new combined matrix through to my siblings and children
if (frame.Sibling != null) // recurse through siblings
{
ComputeBoundingSphere(frame.Sibling, parentMatrix);
}
if (frame.FirstChild != null) // recurse through children
{
ComputeBoundingSphere(frame.FirstChild, combinedMatrix);
}
}
/// <summary>
/// The absolute location/orientation of this Cell is determined by its SOCKET on the parent Cell.
/// This method locates the frame in the parent with the given (genetically defined) name
/// and stores a reference to it in .socket
/// Also stores a reference to the parent cell, to make it easier to walk up the tree
/// </summary>
/// <param name="parent">the Cell to which I'm connected</param>
/// <param name="skt">the name of the socket to which I'm attached</param>
public void Attach(Cell parent, string sktname)
{
try
{
parentSocket = JointFrame.FindBaseName(parent.RootFrame, sktname);
this.parent = parent;
}
catch { }
if (parentSocket == null)
{
throw new SDKException("Cell.FindSocket() was unable to connect cell [" + this.name + "] to parent socket [" + parent.name + "-" + sktname + "]");
}
// Debug.WriteLine(" Connected cell ["+this.name+"] to parent socket ["+parent.name+"-"+sktname+"]");
}
/// <summary>
/// Recursively convert the frame hierarchy into a flat list of frames for
/// easier or more powerful searching, e.g. during 3D picking.
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
private List<JointFrame> FlattenFrames(JointFrame frame, List<JointFrame> list)
{
list.Add(frame);
if (frame.Sibling!=null)
FlattenFrames(frame.Sibling, list);
if (frame.FirstChild!=null)
FlattenFrames(frame.FirstChild, list);
return list;
}
/// <summary>
/// Recursively process frame node(s) and their subnodes from an XFileData object
/// </summary>
/// <param name="node"></param>
/// <param name="depth"></param>
/// <param name="parentFrame"></param>
private static void LoadFrame(XFileData node, int depth, JointFrame parentFrame)
{
JointFrame newFrame = new JointFrame(node.Name); // Create a new frame
// Debug.Write(Depth(depth) + "Creating frame "+newFrame.Name+" ("+newFrame.Type.ToString()+":"+newFrame.Index+") ");
if (parentFrame==null) // if there's no parent frame
{ // the new frame is the root
// Debug.WriteLine("as root");
rootFrame = newFrame;
}
else if (parentFrame.FirstChild==null) // or, if we're the first child
{
// Debug.WriteLine("as child of "+parentFrame.Name);
parentFrame.FirstChild = newFrame; // attach as first child of parent
}
else // else we're a sibling
{
JointFrame bigSister = parentFrame.FirstChild;
while (bigSister.Sibling!=null) // so scan to the end of this row
bigSister = bigSister.Sibling;
// Debug.WriteLine("as sibling of "+bigSister.Name);
bigSister.Sibling = newFrame; // attach as a sibling
}
// --------- Recurse through this node's children to construct frame's contents ----------
depth++;
for (int i=0; i<node.NumberChildren; i++)
{
using (XFileData child = node.GetChild(i))
{
// **** Frame nested inside this frame
if (child.Type==XFileGuid.Frame)
{
LoadFrame(child, depth, newFrame);
}
// **** FrameTransformationMatrix
else if (child.Type==XFileGuid.FrameTransformMatrix)
{
LoadTransformationMatrix(child, depth, newFrame);
}
// **** Mesh
else if (child.Type==XFileGuid.Mesh)
{
string name = child.Name; // use mesh named in xfile if available
if (name == "") name = node.Name; // or name it after the frame
LoadMesh(child, name, depth, newFrame);
}
}
}
}
/// <summary>
/// Recursively create a list of frames that contain meshes.
/// Useful for e.g. collision detection.
/// </summary>
/// <param name="frame">Current frame in the recursion</param>
/// <param name="list">Where to store the results</param>
/// <param name="includeSpots">False if we only want major meshes, not hotspots, sockets or channels</param>
/// <returns></returns>
private List<JointFrame> GetMeshFrames(JointFrame frame, List<JointFrame> list, bool includeSpots)
{
if (frame.MeshContainer != null) // if we have a mesh
{
if ((includeSpots==true)
||(frame.Type==JointFrame.FrameType.General)
||(frame.Type==JointFrame.FrameType.Animating)) // optionally exclude hotspots & sockets
{
list.Add(frame);
}
}
if (frame.Sibling != null)
GetMeshFrames(frame.Sibling, list, includeSpots);
if (frame.FirstChild != null)
GetMeshFrames(frame.FirstChild, list, includeSpots);
return list;
}
/// <summary>
/// Read a mesh and create a Cytoplasm object from it, then attach this to the current frame
/// </summary>
/// <param name="node"></param>
/// <param name="depth"></param>
/// <param name="thisFrame"></param>
private static void LoadMesh(XFileData node, string name, int depth, JointFrame thisFrame)
{
// Debug.WriteLine(Depth(depth) + "Creating Mesh "+name+" for "+thisFrame.Name);
Mesh mesh = null;
ExtendedMaterial[] materials = null;
GraphicsStream adjacency = null;
EffectInstance[] effects = null;
try
{
mesh = Mesh.FromX(node,MeshFlags.Managed,Engine.Device,out adjacency, out materials, out effects);
//Debug.WriteLine(Depth(depth) + "Mesh "+node.Name+" has "+mesh.NumberVertices+" verts and "+materials.Length+" materials");
}
catch (Direct3DXException e)
{
Debug.WriteLine("Error reading mesh: "+e.ToString());
throw;
}
// Create a Cytoplasm (meshcontainer) object from mesh, materials, etc.
// Give it the right name (node.Name)
// Link it into the tree of Cytoplasm objects
// Link it to this mesh
Cytoplasm cyt = new Cytoplasm(folder,name,mesh,materials,effects,adjacency,null);
thisFrame.MeshContainer = cyt;
}
// Helper for above
private bool MousePick(JointFrame frame, Vector3 rayPosition, Vector3 rayDirection)
{
// Skip frames that don't have meshes
if (frame.MeshContainer == null)
return false;
// Unproject the ray and its normal into model space
Matrix unproject = Matrix.Invert(frame.CombinedMatrix);
Vector3 localPosn = Vector3.TransformCoordinate(rayPosition, unproject);
Vector3 localDirn = Vector3.TransformNormal(rayDirection, unproject);
localDirn.Normalize();
// Do the intersection test
return ((Cytoplasm)frame.MeshContainer).OriginalMesh.Intersect(localPosn, localDirn);
}
/// <summary>
/// Called by UpdateFrames() to recursively calculate all combined matrices.
/// </summary>
/// <param name="frame"></param>
/// <param name="parentMatrix"></param>
private void RecurseFrameMatrices(JointFrame frame, Matrix parentMatrix)
{
// My combined transformation matrix is computed by combining my frame orientation
// with my parent's combined matrix
frame.CombinedMatrix = frame.TransformationMatrix * parentMatrix; // combine my matrix with total so far
// Now propagate the new combined matrix through to my siblings and children
if (frame.Sibling != null) // recurse through siblings
{
RecurseFrameMatrices(frame.Sibling, parentMatrix);
}
if (frame.FirstChild != null) // recurse through children
{
RecurseFrameMatrices(frame.FirstChild, frame.CombinedMatrix);
}
}
/// <summary>
/// Find the frame in this hierarchy with this EXACT name
/// </summary>
/// <param name="root">the root to start searching from</param>
/// <param name="name">the EXACT name of the frame</param>
/// <returns>the frame of that name, or null if not found</returns>
public static JointFrame Find(JointFrame root, string name)
{
// get the current frame's name. If we match then return
if (root.Name == name)
{
return root;
}
// else continue with rest of hierarchy
if (root.Sibling!=null)
{
JointFrame result = Find(root.Sibling,name);
if (result!=null)
return result;
}
if (root.FirstChild!=null)
{
JointFrame result = Find(root.FirstChild,name);
if (result!=null)
return result;
}
return null;
}
