protected void TagNodesWithObject(BspNode node, MovableObject obj, Vector3 pos)
{
if (node.IsLeaf)
{
// Add to movable->node map
// Insert all the time, will get current if already there
objectToNodeMap.Insert(obj, node);
node.AddObject(obj);
}
else
{
// Find distance to dividing plane
float dist = node.GetDistance(pos);
//CHECK: treat obj as bounding box?
if (MathUtil.Abs(dist) < obj.BoundingRadius)
{
// Bounding sphere crosses the plane, do both.
TagNodesWithObject(node.BackNode, obj, pos);
TagNodesWithObject(node.FrontNode, obj, pos);
}
else if (dist < 0)
{
// Do back.
TagNodesWithObject(node.BackNode, obj, pos);
}
else
{
// Do front.
TagNodesWithObject(node.FrontNode, obj, pos);
}
}
}
/// <summary>
/// Walks the entire BSP tree and returns the leaf which contains the given point.
/// </summary>r
public BspNode FindLeaf(Vector3 point)
{
BspNode node = nodes[0];
while (!node.IsLeaf)
{
node = node.GetNextNode(point);
}
return(node);
}
private void CreateLeaves(Quake3Level q3lvl)
{
for (int i = 0; i < q3lvl.NumLeaves; ++i)
{
BspNode node = nodes[i + this.LeafStart];
InternalBspLeaf q3leaf = q3lvl.Leaves[i];
node.IsLeaf = true;
node.Owner = this;
// Set bounding box
node.BoundingBox.Minimum = new Vector3(
q3leaf.bbox[0],
q3leaf.bbox[1],
q3leaf.bbox[2]
);
node.BoundingBox.Maximum = new Vector3(
q3leaf.bbox[3],
q3leaf.bbox[4],
q3leaf.bbox[5]
);
// Set faces
node.FaceGroupStart = q3leaf.faceStart;
node.NumFaceGroups = q3leaf.faceCount;
node.VisCluster = q3leaf.cluster;
// Load Brushes for this leaf
int realBrushIdx = 0, solidIdx = 0;
int brushCount = q3leaf.brushCount;
int brushIdx = q3leaf.brushStart;
node.SolidBrushes = new BspBrush[brushCount];
while (brushCount-- > 0)
{
realBrushIdx = q3lvl.LeafBrushes[brushIdx];
InternalBspBrush q3brush = q3lvl.Brushes[realBrushIdx];
// Only load solid ones, we don't care about any other types
// Shader determines this.
InternalBspShader brushShader = q3lvl.Shaders[q3brush.shaderIndex];
if ((brushShader.contentFlags & ContentFlags.Solid) == ContentFlags.Solid)
{
node.SolidBrushes[solidIdx] = brushes[realBrushIdx];
}
brushIdx++;
solidIdx++;
}
}
}
/// <summary>
/// Determines if one leaf node is visible from another.
/// </summary>
/// <param name="?"></param>
/// <returns></returns>
public bool IsLeafVisible(BspNode from, BspNode to)
{
if (to.VisCluster == -1)
{
return(false);
}
if (from.VisCluster == -1)
{
// Camera outside world?
return(true);
}
if (!from.IsLeaf || !to.IsLeaf)
{
throw new AxiomException("Both nodes must be leaf nodes for visibility testing.");
}
// Use PVS to determine visibility
/*
* // In wordier terms, the fairly cryptic (but fast) version is doing this:
* // Could make it a macro for even more speed?
*
* // Row offset = from cluster number * row size
* int offset = from->mVisCluster*mVisData.rowLength;
*
* // Column offset (in bytes) = to cluster number divided by 8 (since 8 bits per bytes)
* offset += to->mVisCluster >> 3;
*
* // Get the right bit within the byte, i.e. bitwise 'and' with bit at remainder position
* int result = *(mVisData.tableData + offset) & (1 << (to->mVisCluster & 7));
*
* return (result != 0);
*/
byte visSet = visData.tableData[(from.VisCluster * visData.rowLength) + (to.VisCluster >> 3)];
int result = visSet & (1 << ((to.VisCluster) & 7));
return(result != 0);
}
protected virtual void ProcessNode( BspNode node, Ray tracingRay, float maxDistance, float traceDistance )
{
// check if ray already encountered a solid brush
if ( this.StopRayTracing )
{
return;
}
if ( node.IsLeaf )
{
ProcessLeaf( node, tracingRay, maxDistance, traceDistance );
return;
}
IntersectResult result = tracingRay.Intersects( node.SplittingPlane );
if ( result.Hit )
{
if ( result.Distance < maxDistance )
{
if ( node.GetSide( tracingRay.Origin ) == PlaneSide.Negative )
{
ProcessNode( node.BackNode, tracingRay, result.Distance, traceDistance );
Vector3 splitPoint = tracingRay.Origin + tracingRay.Direction*result.Distance;
ProcessNode( node.FrontNode, new Ray( splitPoint, tracingRay.Direction ), maxDistance - result.Distance,
traceDistance + result.Distance );
}
else
{
ProcessNode( node.FrontNode, tracingRay, result.Distance, traceDistance );
Vector3 splitPoint = tracingRay.Origin + tracingRay.Direction*result.Distance;
ProcessNode( node.BackNode, new Ray( splitPoint, tracingRay.Direction ), maxDistance - result.Distance,
traceDistance + result.Distance );
}
}
else
{
ProcessNode( node.GetNextNode( tracingRay.Origin ), tracingRay, maxDistance, traceDistance );
}
}
else
{
ProcessNode( node.GetNextNode( tracingRay.Origin ), tracingRay, maxDistance, traceDistance );
}
}
/// <summary>
/// Determines if the passed in node (must also be a leaf) is visible from this leaf.
/// </summary>
/// <remarks>
/// Must only be called on a leaf node, and the parameter must also be a leaf node. If
/// this method returns true, then the leaf passed in is visible from this leaf.
/// Note that internally this uses the Potentially Visible Set (PVS) which is precalculated
/// and stored with the BSP level.
/// </remarks>
public bool IsLeafVisible(BspNode leaf)
{
return owner.IsLeafVisible(this, leaf);
}
private void CreateNodes(Quake3Level q3lvl)
{
// Allocate memory for all nodes (leaves and splitters)
nodes = new BspNode[q3lvl.NumNodes + q3lvl.NumLeaves];
numLeaves = q3lvl.NumLeaves;
leafStart = q3lvl.NumNodes;
// Run through and initialize the array so front/back node pointers
// aren't null.
for(int i = 0; i < nodes.Length; i++)
nodes[i] = new BspNode();
// Convert nodes
// In our array, first q3lvl.NumNodes are non-leaf, others are leaves
for(int i = 0; i < q3lvl.NumNodes; i++)
{
BspNode node = nodes[i];
InternalBspNode q3node = q3lvl.Nodes[i];
node.IsLeaf = false;
node.Owner = this;
Plane splitPlane = new Plane();
// Set plane
splitPlane.Normal = new Vector3(
q3lvl.Planes[q3node.plane].normal[0],
q3lvl.Planes[q3node.plane].normal[1],
q3lvl.Planes[q3node.plane].normal[2]
);
splitPlane.D = -q3lvl.Planes[q3node.plane].distance;
node.SplittingPlane = splitPlane;
// Set bounding box
node.BoundingBox = new AxisAlignedBox(
new Vector3(
q3node.bbox[0],
q3node.bbox[1],
q3node.bbox[2]
),
new Vector3(
q3node.bbox[3],
q3node.bbox[4],
q3node.bbox[5]
)
);
// Set back pointer
// Negative indexes in Quake3 mean leaves.
if(q3node.back < 0)
node.BackNode = nodes[leafStart + (~(q3node.back))];
else
node.BackNode = nodes[q3node.back];
// Set front pointer
// Negative indexes in Quake3 mean leaves
if(q3node.front < 0)
node.FrontNode = nodes[leafStart + (~(q3node.front))];
else
node.FrontNode = nodes[q3node.front];
}
}
protected void TagNodesWithObject(BspNode node, MovableObject obj, Vector3 pos)
{
if(node.IsLeaf)
{
// Add to movable->node map
// Insert all the time, will get current if already there
objectToNodeMap.Insert(obj, node);
node.AddObject(obj);
}
else
{
// Find distance to dividing plane
float dist = node.GetDistance(pos);
//CHECK: treat obj as bounding box?
if(MathUtil.Abs(dist) < obj.BoundingRadius)
{
// Bounding sphere crosses the plane, do both.
TagNodesWithObject(node.BackNode, obj, pos);
TagNodesWithObject(node.FrontNode, obj, pos);
}
else if(dist < 0)
{
// Do back.
TagNodesWithObject(node.BackNode, obj, pos);
}
else
{
// Do front.
TagNodesWithObject(node.FrontNode, obj, pos);
}
}
}
/// <summary>
/// Determines if one leaf node is visible from another.
/// </summary>
/// <param name="?"></param>
/// <returns></returns>
public bool IsLeafVisible(BspNode from, BspNode to)
{
if(to.VisCluster == -1)
return false;
if(from.VisCluster == -1)
// Camera outside world?
return true;
if(!from.IsLeaf || !to.IsLeaf)
throw new AxiomException("Both nodes must be leaf nodes for visibility testing.");
// Use PVS to determine visibility
/*
// In wordier terms, the fairly cryptic (but fast) version is doing this:
// Could make it a macro for even more speed?
// Row offset = from cluster number * row size
int offset = from->mVisCluster*mVisData.rowLength;
// Column offset (in bytes) = to cluster number divided by 8 (since 8 bits per bytes)
offset += to->mVisCluster >> 3;
// Get the right bit within the byte, i.e. bitwise 'and' with bit at remainder position
int result = *(mVisData.tableData + offset) & (1 << (to->mVisCluster & 7));
return (result != 0);
*/
byte visSet = visData.tableData[(from.VisCluster * visData.rowLength) + (to.VisCluster >> 3)];
int result = visSet & (1 << ((to.VisCluster) & 7));
return (result != 0);
}
protected virtual void ProcessLeaf(BspNode leaf)
{
MovableObjectCollection objects = leaf.Objects;
int numObjects = objects.Count;
//Check sphere against objects
for(int a = 0; a < numObjects; a++)
{
MovableObject obj = objects[a];
// Skip this object if collision not enabled
if((obj.QueryFlags & queryMask) == 0)
continue;
//Test object as bounding box
if(sphere.Intersects(obj.GetWorldBoundingBox()))
{
if (!foundIntersections.Contains(obj))
{
listener.OnQueryResult(obj);
foundIntersections.Add(obj);
}
}
}
PlaneBoundedVolume boundedVolume = new PlaneBoundedVolume(PlaneSide.Positive);
// Check ray against brushes
for (int brushPoint=0; brushPoint < leaf.SolidBrushes.Length; brushPoint++)
{
BspBrush brush = leaf.SolidBrushes[brushPoint];
if (brush == null) continue;
boundedVolume.planes = brush.Planes;
if(boundedVolume.Intersects(sphere))
{
listener.OnQueryResult(brush.Fragment);
}
}
}
protected virtual void ProcessLeaf( BspNode leaf )
{
//Check sphere against objects
foreach ( MovableObject obj in leaf.Objects.Values )
{
// Skip this object if collision not enabled
if ( ( obj.QueryFlags & queryMask ) == 0 )
{
continue;
}
//Test object as bounding box
if ( sphere.Intersects( obj.GetWorldBoundingBox() ) )
{
if ( !this.foundIntersections.Contains( obj ) )
{
this.listener.OnQueryResult( obj );
this.foundIntersections.Add( obj );
}
}
}
var boundedVolume = new PlaneBoundedVolume( PlaneSide.Positive );
// Check ray against brushes
for ( int brushPoint = 0; brushPoint < leaf.SolidBrushes.Length; brushPoint++ )
{
BspBrush brush = leaf.SolidBrushes[ brushPoint ];
if ( brush == null )
{
continue;
}
boundedVolume.planes = brush.Planes;
if ( boundedVolume.Intersects( sphere ) )
{
this.listener.OnQueryResult( brush.Fragment );
}
}
}
private void CreateNodes(Quake3Level q3lvl)
{
// Allocate memory for all nodes (leaves and splitters)
nodes = new BspNode[q3lvl.NumNodes + q3lvl.NumLeaves];
numLeaves = q3lvl.NumLeaves;
leafStart = q3lvl.NumNodes;
// Run through and initialize the array so front/back node pointers
// aren't null.
for (int i = 0; i < nodes.Length; i++)
{
nodes[i] = new BspNode();
}
// Convert nodes
// In our array, first q3lvl.NumNodes are non-leaf, others are leaves
for (int i = 0; i < q3lvl.NumNodes; i++)
{
BspNode node = nodes[i];
InternalBspNode q3node = q3lvl.Nodes[i];
node.IsLeaf = false;
node.Owner = this;
Plane splitPlane = new Plane();
// Set plane
splitPlane.Normal = new Vector3(
q3lvl.Planes[q3node.plane].normal[0],
q3lvl.Planes[q3node.plane].normal[1],
q3lvl.Planes[q3node.plane].normal[2]
);
splitPlane.D = -q3lvl.Planes[q3node.plane].distance;
node.SplittingPlane = splitPlane;
// Set bounding box
node.BoundingBox = new AxisAlignedBox(
new Vector3(
q3node.bbox[0],
q3node.bbox[1],
q3node.bbox[2]
),
new Vector3(
q3node.bbox[3],
q3node.bbox[4],
q3node.bbox[5]
)
);
// Set back pointer
// Negative indexes in Quake3 mean leaves.
if (q3node.back < 0)
{
node.BackNode = nodes[leafStart + (~(q3node.back))];
}
else
{
node.BackNode = nodes[q3node.back];
}
// Set front pointer
// Negative indexes in Quake3 mean leaves
if (q3node.front < 0)
{
node.FrontNode = nodes[leafStart + (~(q3node.front))];
}
else
{
node.FrontNode = nodes[q3node.front];
}
}
}
/// <summary>
/// Overriden from SceneManager.
/// </summary>
/// <param name="position">The position at which to evaluate the list of lights</param>
/// <param name="radius">The bounding radius to test</param>
/// <param name="destList">List to be populated with ordered set of lights; will be cleared by this method before population.</param>
protected override void PopulateLightList(Vector3 position, float radius, LightList destList)
{
BspNode positionNode = level.FindLeaf(position);
BspNode[] lightNodes = new BspNode[lightList.Count];
for (int i = 0; i < lightList.Count; i++)
{
Light light = lightList[i];
lightNodes[i] = (BspNode) level.objectToNodeMap.FindFirst(light);
}
// Trawl of the lights that are visible from position, then sort
destList.Clear();
float squaredRadius = radius * radius;
// loop through the scene lights an add ones in range and visible from positionNode
for(int i = 0; i < lightList.Count; i++)
{
TextureLight light = (TextureLight) lightList[i];
if(light.IsVisible && level.IsLeafVisible(positionNode, lightNodes[i]))
{
if(light.Type == LightType.Directional)
{
// no distance
light.TempSquaredDist = 0.0f;
destList.Add(light);
}
else
{
light.TempSquaredDist = (light.DerivedPosition - position).LengthSquared;
light.TempSquaredDist -= squaredRadius;
// only add in-range lights
float range = light.AttenuationRange;
if(light.TempSquaredDist <= (range * range))
{
destList.Add(light);
}
}
} // if
} // for
// Sort Destination light list.
// TODO: Not needed yet since the current LightList is a sorted list under the hood already
//destList.Sort();
}
protected virtual void ProcessLeaf(BspNode leaf, Ray tracingRay, float maxDistance, float traceDistance)
{
MovableObjectCollection objects = leaf.Objects;
int numObjects = objects.Count;
//Check ray against objects
for(int a = 0; a < numObjects; a++)
{
MovableObject obj = objects[a];
// Skip this object if collision not enabled
if((obj.QueryFlags & queryMask) == 0)
continue;
//Test object as bounding box
IntersectResult result = tracingRay.Intersects(obj.GetWorldBoundingBox());
// if the result came back positive and intersection point is inside
// the node, fire the event handler
if(result.Hit && result.Distance <= maxDistance)
{
listener.OnQueryResult(obj, result.Distance + traceDistance);
}
}
PlaneBoundedVolume boundedVolume = new PlaneBoundedVolume(PlaneSide.Positive);
BspBrush intersectBrush = null;
float intersectBrushDist = float.PositiveInfinity;
// Check ray against brushes
for (int brushPoint=0; brushPoint < leaf.SolidBrushes.Length; brushPoint++)
{
BspBrush brush = leaf.SolidBrushes[brushPoint];
if (brush == null) continue;
boundedVolume.planes = brush.Planes;
IntersectResult result = tracingRay.Intersects(boundedVolume);
// if the result came back positive and intersection point is inside
// the node, check if this brush is closer
if(result.Hit && result.Distance <= maxDistance)
{
if (result.Distance < intersectBrushDist)
{
intersectBrushDist = result.Distance;
intersectBrush = brush;
}
}
}
if (intersectBrush != null)
{
listener.OnQueryResult(intersectBrush.Fragment, intersectBrushDist + traceDistance);
StopRayTracing = true;
}
}
protected virtual void ProcessLeaf( BspNode leaf, Ray tracingRay, float maxDistance, float traceDistance )
{
//Check ray against objects
foreach ( MovableObject obj in leaf.Objects.Values )
{
// Skip this object if collision not enabled
if ( ( obj.QueryFlags & queryMask ) == 0 )
{
continue;
}
//Test object as bounding box
IntersectResult result = tracingRay.Intersects( obj.GetWorldBoundingBox() );
// if the result came back positive and intersection point is inside
// the node, fire the event handler
if ( result.Hit && result.Distance <= maxDistance )
{
this.listener.OnQueryResult( obj, result.Distance + traceDistance );
}
}
var boundedVolume = new PlaneBoundedVolume( PlaneSide.Positive );
BspBrush intersectBrush = null;
float intersectBrushDist = float.PositiveInfinity;
if ( ( QueryTypeMask & (ulong)SceneQueryTypeMask.WorldGeometry ) != 0 )
{
// Check ray against brushes
if ( ( QueryTypeMask & (ulong)SceneQueryTypeMask.WorldGeometry ) != 0 )
{
for ( int brushPoint = 0; brushPoint < leaf.SolidBrushes.Length; brushPoint++ )
{
BspBrush brush = leaf.SolidBrushes[ brushPoint ];
if ( brush == null )
{
continue;
}
boundedVolume.planes = brush.Planes;
IntersectResult result = tracingRay.Intersects( boundedVolume );
// if the result came back positive and intersection point is inside
// the node, check if this brush is closer
if ( result.Hit && result.Distance <= maxDistance )
{
if ( result.Distance < intersectBrushDist )
{
intersectBrushDist = result.Distance;
intersectBrush = brush;
}
}
}
if ( intersectBrush != null )
{
this.listener.OnQueryResult( intersectBrush.Fragment, intersectBrushDist + traceDistance );
this.StopRayTracing = true;
}
}
}
if ( intersectBrush != null )
{
this.listener.OnQueryResult( intersectBrush.Fragment, intersectBrushDist + traceDistance );
this.StopRayTracing = true;
}
}
/// <summary>
/// /** Internal utility function for loading data from Quake3.
/// </summary>
protected void LoadQuake3Level( Quake3Level q3lvl )
{
ResourceGroupManager rgm = ResourceGroupManager.Instance;
rgm.notifyWorldGeometryStageStarted( "Parsing entities" );
LoadEntities( q3lvl );
rgm.notifyWorldGeometryStageEnded();
rgm.notifyWorldGeometryStageStarted( "Extracting lightmaps" );
q3lvl.ExtractLightmaps();
rgm.notifyWorldGeometryStageEnded();
//-----------------------------------------------------------------------
// Vertices
//-----------------------------------------------------------------------
// Allocate memory for vertices & copy
vertexData = new VertexData();
// Create vertex declaration
VertexDeclaration decl = vertexData.vertexDeclaration;
int offset = 0;
int lightTexOffset = 0;
decl.AddElement( 0, offset, VertexElementType.Float3, VertexElementSemantic.Position );
offset += VertexElement.GetTypeSize( VertexElementType.Float3 );
decl.AddElement( 0, offset, VertexElementType.Float3, VertexElementSemantic.Normal );
offset += VertexElement.GetTypeSize( VertexElementType.Float3 );
decl.AddElement( 0, offset, VertexElementType.Float2, VertexElementSemantic.TexCoords, 0 );
offset += VertexElement.GetTypeSize( VertexElementType.Float2 );
decl.AddElement( 0, offset, VertexElementType.Float2, VertexElementSemantic.TexCoords, 1 );
// Build initial patches - we need to know how big the vertex buffer needs to be
// to accommodate the subdivision
// we don't want to include the elements for texture lighting, so we clone it
rgm.notifyWorldGeometryStageStarted( "Initializing patches" );
InitQuake3Patches( q3lvl, (VertexDeclaration)decl.Clone() );
rgm.notifyWorldGeometryStageEnded();
// this is for texture lighting color and alpha
decl.AddElement( 1, lightTexOffset, VertexElementType.Color, VertexElementSemantic.Diffuse );
lightTexOffset += VertexElement.GetTypeSize( VertexElementType.Color );
// this is for texture lighting coords
decl.AddElement( 1, lightTexOffset, VertexElementType.Float2, VertexElementSemantic.TexCoords, 2 );
rgm.notifyWorldGeometryStageStarted( "Setting up vertex data" );
// Create the vertex buffer, allow space for patches
HardwareVertexBuffer vbuf = HardwareBufferManager.Instance.CreateVertexBuffer( decl.Clone(0), q3lvl.NumVertices + patchVertexCount, BufferUsage.StaticWriteOnly /* the vertices will be read often for texture lighting, use shadow buffer */, true );
// Create the vertex buffer for texture lighting, allow space for patches
HardwareVertexBuffer texLightBuf = HardwareBufferManager.Instance.CreateVertexBuffer( decl.Clone(1), q3lvl.NumVertices + patchVertexCount, BufferUsage.DynamicWriteOnly, false );
// COPY static vertex data - Note that we can't just block-copy the vertex data because we have to reorder
// our vertex elements; this is to ensure compatibility with older cards when using
// hardware vertex buffers - Direct3D requires that the buffer format maps onto a
// FVF in those older drivers.
// Lock just the non-patch area for now.
unsafe
{
BspVertex vert = new BspVertex();
TextureLightMap texLightMap = new TextureLightMap();
// Keep another base pointer for use later in patch building
for ( int v = 0; v < q3lvl.NumVertices; v++ )
{
QuakeVertexToBspVertex( q3lvl.Vertices[ v ], out vert, out texLightMap );
BspVertex* bvptr = |
TextureLightMap* tlptr = &texLightMap;
vbuf.WriteData(
v * sizeof( BspVertex ),
sizeof( BspVertex ),
(IntPtr)bvptr
);
texLightBuf.WriteData(
v * sizeof( TextureLightMap ),
sizeof( TextureLightMap ),
(IntPtr)tlptr
);
}
}
// Setup binding
vertexData.vertexBufferBinding.SetBinding( 0, vbuf );
// Setup texture lighting binding
vertexData.vertexBufferBinding.SetBinding( 1, texLightBuf );
// Set other data
vertexData.vertexStart = 0;
vertexData.vertexCount = q3lvl.NumVertices + patchVertexCount;
rgm.notifyWorldGeometryStageEnded();
//-----------------------------------------------------------------------
// Faces
//-----------------------------------------------------------------------
rgm.notifyWorldGeometryStageStarted( "Setting up face data" );
leafFaceGroups = new int[ q3lvl.LeafFaces.Length ];
Array.Copy( q3lvl.LeafFaces, 0, leafFaceGroups, 0, leafFaceGroups.Length );
faceGroups = new BspStaticFaceGroup[ q3lvl.Faces.Length ];
// Set up index buffer
// NB Quake3 indexes are 32-bit
// Copy the indexes into a software area for staging
numIndexes = q3lvl.NumElements + patchIndexCount;
// Create an index buffer manually in system memory, allow space for patches
indexes = HardwareBufferManager.Instance.CreateIndexBuffer(
IndexType.Size32,
numIndexes,
BufferUsage.Dynamic
);
// Write main indexes
indexes.WriteData( 0, Marshal.SizeOf( typeof( uint ) ) * q3lvl.NumElements, q3lvl.Elements, true );
rgm.notifyWorldGeometryStageEnded();
// now build patch information
rgm.notifyWorldGeometryStageStarted( "Building patches" );
BuildQuake3Patches( q3lvl.NumVertices, q3lvl.NumElements );
rgm.notifyWorldGeometryStageEnded();
//-----------------------------------------------------------------------
// Create materials for shaders
//-----------------------------------------------------------------------
// NB this only works for the 'default' shaders for now
// i.e. those that don't have a .shader script and thus default
// to just texture + lightmap
// TODO: pre-parse all .shader files and create lookup for next stage (use ROGL shader_file_t)
// Material names are shadername#lightmapnumber
// This is because I like to define materials up front completely
// rather than combine lightmap and shader dynamically (it's
// more generic). It results in more materials, but they're small
// beer anyway. Texture duplication is prevented by infrastructure.
// To do this I actually need to parse the faces since they have the
// shader/lightmap combo (lightmap number is not in the shader since
// it can be used with multiple lightmaps)
string shaderName;
int face = q3lvl.Faces.Length;
int progressCountdown = 100;
int progressCount = 0;
while ( face-- > 0 )
{
// Progress reporting
if ( progressCountdown == 100 )
{
++progressCount;
String str = String.Format( "Loading materials (phase {0})", progressCount );
rgm.notifyWorldGeometryStageStarted( str );
}
else if ( progressCountdown == 0 )
{
// stage report
rgm.notifyWorldGeometryStageEnded();
progressCountdown = 100 + 1;
}
// Check to see if existing material
// Format shader#lightmap
int shadIdx = q3lvl.Faces[ face ].shader;
shaderName = String.Format( "{0}#{1}", q3lvl.Shaders[ shadIdx ].name, q3lvl.Faces[ face ].lmTexture );
Material shadMat = (Material)MaterialManager.Instance.GetByName( shaderName );
if ( shadMat == null && !bspOptions.useLightmaps )
{
// try the no-lightmap material
shaderName = String.Format( "{0}#n", q3lvl.Shaders[ shadIdx ].name );
shadMat = (Material)MaterialManager.Instance.GetByName( shaderName );
}
if ( shadMat == null )
{
// Color layer
// NB no extension in Q3A(doh), have to try shader, .jpg, .tga
string tryName = q3lvl.Shaders[ shadIdx ].name;
// Try shader first
Quake3Shader shader = (Quake3Shader)Quake3ShaderManager.Instance.GetByName( tryName );
if ( shader != null )
{
shadMat = shader.CreateAsMaterial( q3lvl.Faces[ face ].lmTexture );
}
else
{
// No shader script, try default type texture
shadMat = (Material)MaterialManager.Instance.Create( shaderName, rgm.WorldResourceGroupName );
Pass shadPass = shadMat.GetTechnique( 0 ).GetPass( 0 );
// Try jpg
TextureUnitState tex = null;
if ( ResourceGroupManager.Instance.ResourceExists( rgm.WorldResourceGroupName, tryName + ".jpg" ) )
{
tex = shadPass.CreateTextureUnitState( tryName + ".jpg" );
}
if ( ResourceGroupManager.Instance.ResourceExists( rgm.WorldResourceGroupName, tryName + ".tga" ) )
{
tex = shadPass.CreateTextureUnitState( tryName + ".tga" );
}
if ( tex != null )
{
// Set replace on all first layer textures for now
tex.SetColorOperation( LayerBlendOperation.Replace );
tex.SetTextureAddressingMode( TextureAddressing.Wrap );
// for ambient lighting
tex.ColorBlendMode.source2 = LayerBlendSource.Manual;
}
if ( bspOptions.useLightmaps && q3lvl.Faces[ face ].lmTexture != -1 )
{
// Add lightmap, additive blending
tex = shadPass.CreateTextureUnitState( String.Format( "@lightmap{0}", q3lvl.Faces[ face ].lmTexture ) );
// Blend
tex.SetColorOperation( LayerBlendOperation.Modulate );
// Use 2nd texture co-ordinate set
tex.TextureCoordSet = 1;
// Clamp
tex.SetTextureAddressingMode( TextureAddressing.Clamp );
}
shadMat.CullingMode = CullingMode.None;
shadMat.Lighting = false;
}
}
shadMat.Load();
// Copy face data
BspStaticFaceGroup dest = new BspStaticFaceGroup();
InternalBspFace src = q3lvl.Faces[ face ];
if ( ( q3lvl.Shaders[ src.shader ].surfaceFlags & SurfaceFlags.Sky ) == SurfaceFlags.Sky )
dest.isSky = true;
else
dest.isSky = false;
dest.materialHandle = shadMat.Handle;
dest.elementStart = src.elemStart;
dest.numElements = src.elemCount;
dest.numVertices = src.vertCount;
dest.vertexStart = src.vertStart;
dest.plane = new Plane();
if ( Quake3ShaderManager.Instance.GetByName( q3lvl.Shaders[ shadIdx ].name ) != null )
{
// it's a quake shader
dest.isQuakeShader = true;
}
if ( src.type == BspFaceType.Normal )
{
dest.type = FaceGroup.FaceList;
// Assign plane
dest.plane.Normal = new Vector3(
src.normal[ 0 ],
src.normal[ 1 ],
src.normal[ 2 ]
);
dest.plane.D = -dest.plane.Normal.Dot(
new Vector3(
src.org[ 0 ],
src.org[ 1 ],
src.org[ 2 ]
)
);
// Don't rebase indexes here - Quake3 re-uses some indexes for multiple vertex
// groups eg repeating small details have the same relative vertex data but
// use the same index data.
}
else if ( src.type == BspFaceType.Patch )
{
// Seems to be some crap in the Q3 level where vertex count = 0 or num control points = 0?
if ( ( dest.numVertices == 0 ) || ( src.meshCtrl[ 0 ] == 0 ) )
{
dest.type = FaceGroup.Unknown;
}
else
{
// Set up patch surface
dest.type = FaceGroup.Patch;
// Locate the patch we already built
if ( !patches.ContainsKey( face ) )
throw new AxiomException( "Patch not found from previous built state." );
dest.patchSurf = (PatchSurface)patches[ face ];
}
}
else if ( src.type == BspFaceType.Mesh )
{
dest.type = FaceGroup.FaceList;
// Assign plane
dest.plane.Normal = new Vector3( src.normal[ 0 ], src.normal[ 1 ], src.normal[ 2 ] );
dest.plane.D = -dest.plane.Normal.Dot( new Vector3( src.org[ 0 ], src.org[ 1 ], src.org[ 2 ] ) );
}
else
{
LogManager.Instance.Write( "!!! Unknown face type !!!" );
}
faceGroups[ face ] = dest;
}
//-----------------------------------------------------------------------
// Nodes
//-----------------------------------------------------------------------
// Allocate memory for all nodes (leaves and splitters)
nodes = new BspNode[ q3lvl.NumNodes + q3lvl.NumLeaves ];
numLeaves = q3lvl.NumLeaves;
leafStart = q3lvl.NumNodes;
// Run through and initialize the array so front/back node pointers
// aren't null.
for ( int i = 0; i < nodes.Length; i++ )
nodes[ i ] = new BspNode();
// Convert nodes
// In our array, first q3lvl.NumNodes are non-leaf, others are leaves
for ( int i = 0; i < q3lvl.NumNodes; i++ )
{
BspNode node = nodes[ i ];
InternalBspNode q3node = q3lvl.Nodes[ i ];
node.IsLeaf = false;
node.Owner = this;
Plane splitPlane = new Plane();
// Set plane
splitPlane.Normal = new Vector3(
q3lvl.Planes[ q3node.plane ].normal[ 0 ],
q3lvl.Planes[ q3node.plane ].normal[ 1 ],
q3lvl.Planes[ q3node.plane ].normal[ 2 ]
);
splitPlane.D = -q3lvl.Planes[ q3node.plane ].distance;
node.SplittingPlane = splitPlane;
// Set bounding box
node.BoundingBox = new AxisAlignedBox(
new Vector3(
q3node.bbox[ 0 ],
q3node.bbox[ 1 ],
q3node.bbox[ 2 ]
),
new Vector3(
q3node.bbox[ 3 ],
q3node.bbox[ 4 ],
q3node.bbox[ 5 ]
)
);
// Set back pointer
// Negative indexes in Quake3 mean leaves.
if ( q3node.back < 0 )
node.BackNode = nodes[ leafStart + ( ~( q3node.back ) ) ];
else
node.BackNode = nodes[ q3node.back ];
// Set front pointer
// Negative indexes in Quake3 mean leaves
if ( q3node.front < 0 )
node.FrontNode = nodes[ leafStart + ( ~( q3node.front ) ) ];
else
node.FrontNode = nodes[ q3node.front ];
}
//-----------------------------------------------------------------------
// Brushes
//-----------------------------------------------------------------------
// Reserve enough memory for all brushes, solid or not (need to maintain indexes)
brushes = new BspBrush[ q3lvl.NumBrushes ];
for ( int i = 0; i < q3lvl.NumBrushes; i++ )
{
InternalBspBrush q3brush = q3lvl.Brushes[ i ];
// Create a new OGRE brush
BspBrush brush = new BspBrush();
int numBrushSides = q3brush.numSides;
int brushSideIdx = q3brush.firstSide;
// Iterate over the sides and create plane for each
while ( numBrushSides-- > 0 )
{
InternalBspPlane side = q3lvl.Planes[ q3lvl.BrushSides[ brushSideIdx ].planeNum ];
// Notice how we normally invert Q3A plane distances, but here we do not
// Because we want plane normals pointing out of solid brushes, not in.
Plane brushSide = new Plane(
new Vector3(
q3lvl.Planes[ q3lvl.BrushSides[ brushSideIdx ].planeNum ].normal[ 0 ],
q3lvl.Planes[ q3lvl.BrushSides[ brushSideIdx ].planeNum ].normal[ 1 ],
q3lvl.Planes[ q3lvl.BrushSides[ brushSideIdx ].planeNum ].normal[ 2 ]
), q3lvl.Planes[ q3lvl.BrushSides[ brushSideIdx ].planeNum ].distance );
brush.Planes.Add( brushSide );
brushSideIdx++;
}
// Build world fragment
brush.Fragment.FragmentType = WorldFragmentType.PlaneBoundedRegion;
brush.Fragment.Planes = brush.Planes;
brushes[ i ] = brush;
}
//-----------------------------------------------------------------------
// Leaves
//-----------------------------------------------------------------------
for ( int i = 0; i < q3lvl.NumLeaves; ++i )
{
BspNode node = nodes[ i + this.LeafStart ];
InternalBspLeaf q3leaf = q3lvl.Leaves[ i ];
node.IsLeaf = true;
node.Owner = this;
// Set bounding box
node.BoundingBox.Minimum = new Vector3(
q3leaf.bbox[ 0 ],
q3leaf.bbox[ 1 ],
q3leaf.bbox[ 2 ]
);
node.BoundingBox.Maximum = new Vector3(
q3leaf.bbox[ 3 ],
q3leaf.bbox[ 4 ],
q3leaf.bbox[ 5 ]
);
// Set faces
node.FaceGroupStart = q3leaf.faceStart;
node.NumFaceGroups = q3leaf.faceCount;
node.VisCluster = q3leaf.cluster;
// Load Brushes for this leaf
int realBrushIdx = 0, solidIdx = 0;
int brushCount = q3leaf.brushCount;
int brushIdx = q3leaf.brushStart;
node.SolidBrushes = new BspBrush[ brushCount ];
while ( brushCount-- > 0 )
{
realBrushIdx = q3lvl.LeafBrushes[ brushIdx ];
InternalBspBrush q3brush = q3lvl.Brushes[ realBrushIdx ];
// Only load solid ones, we don't care about any other types
// Shader determines this.
InternalBspShader brushShader = q3lvl.Shaders[ q3brush.shaderIndex ];
if ( ( brushShader.contentFlags & ContentFlags.Solid ) == ContentFlags.Solid )
node.SolidBrushes[ solidIdx ] = brushes[ realBrushIdx ];
brushIdx++;
solidIdx++;
}
}
// Vis - just copy
visData.numClusters = q3lvl.VisData.clusterCount;
visData.rowLength = q3lvl.VisData.rowSize;
visData.tableData = new byte[ q3lvl.VisData.rowSize * q3lvl.VisData.clusterCount ];
Array.Copy( q3lvl.VisData.data, 0, visData.tableData, 0, visData.tableData.Length );
}
protected virtual void ProcessNode( BspNode node )
{
if ( node.IsLeaf )
{
ProcessLeaf( node );
return;
}
float distance = node.GetDistance( sphere.Center );
if ( Utility.Abs( distance ) < sphere.Radius )
{
// Sphere crosses the plane, do both.
ProcessNode( node.BackNode );
ProcessNode( node.FrontNode );
}
else if ( distance < 0 )
{
// Do back.
ProcessNode( node.BackNode );
}
else
{
// Do front.
ProcessNode( node.FrontNode );
}
}
/// <summary>
/// Determines if the passed in node (must also be a leaf) is visible from this leaf.
/// </summary>
/// <remarks>
/// Must only be called on a leaf node, and the parameter must also be a leaf node. If
/// this method returns true, then the leaf passed in is visible from this leaf.
/// Note that internally this uses the Potentially Visible Set (PVS) which is precalculated
/// and stored with the BSP level.
/// </remarks>
public bool IsLeafVisible(BspNode leaf)
{
return(owner.IsLeafVisible(this, leaf));
}
/// <summary>
/// Tags geometry in the leaf specified for later rendering.
/// </summary>
protected void ProcessVisibleLeaf( BspNode leaf, Camera camera, bool onlyShadowCasters )
{
// Skip world geometry if we're only supposed to process shadow casters
// World is pre-lit
if ( !onlyShadowCasters )
{
// Parse the leaf node's faces, add face groups to material map
int numGroups = leaf.NumFaceGroups;
int idx = leaf.FaceGroupStart;
while ( numGroups-- > 0 )
{
int realIndex = this.level.LeafFaceGroups[ idx++ ];
// Is it already checked ?
if ( this.faceGroupChecked.ContainsKey( realIndex ) && this.faceGroupChecked[ realIndex ] == true )
{
continue;
}
this.faceGroupChecked[ realIndex ] = true;
BspStaticFaceGroup faceGroup = this.level.FaceGroups[ realIndex ];
// Get Material reference by handle
Material mat = GetMaterial( faceGroup.materialHandle );
// Check normal (manual culling)
ManualCullingMode cullMode = mat.GetTechnique( 0 ).GetPass( 0 ).ManualCullingMode;
if ( cullMode != ManualCullingMode.None )
{
float dist = faceGroup.plane.GetDistance( camera.DerivedPosition );
if ( ( ( dist < 0 ) && ( cullMode == ManualCullingMode.Back ) ) ||
( ( dist > 0 ) && ( cullMode == ManualCullingMode.Front ) ) )
{
continue;
}
}
// Try to insert, will find existing if already there
this.matFaceGroupMap.Add( mat, faceGroup );
}
}
// Add movables to render queue, provided it hasn't been seen already.
foreach ( MovableObject obj in leaf.Objects.Values )
{
if ( !this.objectsForRendering.ContainsKey( obj.Name ) )
{
if ( obj.IsVisible && ( !onlyShadowCasters || obj.CastShadows ) &&
camera.IsObjectVisible( obj.GetWorldBoundingBox() ) )
{
obj.NotifyCurrentCamera( camera );
obj.UpdateRenderQueue( renderQueue );
// Check if the bounding box should be shown.
var node = (SceneNode)obj.ParentNode;
if ( node.ShowBoundingBox || showBoundingBoxes )
{
node.AddBoundingBoxToQueue( renderQueue );
}
this.objectsForRendering.Add( obj );
}
}
}
}
/// <summary>
/// Walks the BSP tree looking for the node which the camera is in, and tags any geometry
/// which is in a visible leaf for later processing.
/// </summary>
protected BspNode WalkTree(Camera camera, bool onlyShadowCasters)
{
// Locate the leaf node where the camera is located
BspNode cameraNode = level.FindLeaf(camera.DerivedPosition);
matFaceGroupMap.Clear();
faceGroupChecked = new bool[level.FaceGroups.Length];
TextureLight[] lights = new TextureLight[lightList.Count];
BspNode[] lightNodes = new BspNode[lightList.Count];
Sphere[] lightSpheres = new Sphere[lightList.Count];
// The base SceneManager uses this for shadows.
// The BspSceneManager uses this for texture lighting as well.
if (shadowTechnique == ShadowTechnique.None)
{
lightsAffectingFrustum.Clear();
lightAddedToFrustum = new bool[lightList.Count];
}
for (int lp=0; lp < lightList.Count; lp++)
{
TextureLight light = (TextureLight) lightList[lp];
lights[lp] = light;
lightNodes[lp] = (BspNode) level.objectToNodeMap.FindFirst(light);
if (light.Type != LightType.Directional)
{
// treating spotlight as point for simplicity
lightSpheres[lp] = new Sphere(light.DerivedPosition, light.AttenuationRange);
}
}
// Scan through all the other leaf nodes looking for visibles
int i = level.NumNodes - level.LeafStart;
int p = level.LeafStart;
BspNode node;
while(i-- > 0)
{
node = level.Nodes[p];
if(level.IsLeafVisible(cameraNode, node))
{
// Visible according to PVS, check bounding box against frustum
FrustumPlane plane;
if(camera.IsObjectVisible(node.BoundingBox, out plane))
{
if (!onlyShadowCasters)
{
for (int lp=0; lp < lights.Length; lp++)
{
if (lightAddedToFrustum[lp] || !lights[lp].IsVisible)
continue;
if (level.IsLeafVisible(lightNodes[lp], node) &&
(lights[lp].Type == LightType.Directional ||
lightSpheres[lp].Intersects(node.BoundingBox)))
{
// This is set so that the lights are rendered with ascending
// Priority order.
lights[lp].TempSquaredDist = lights[lp].Priority;
lightsAffectingFrustum.Add(lights[lp]);
lightAddedToFrustum[lp] = true;
}
}
}
ProcessVisibleLeaf(node, camera, onlyShadowCasters);
if(showNodeAABs)
AddBoundingBox(node.BoundingBox, true);
}
}
p++;
}
return cameraNode;
}
