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BulletSim: add code to experimentally use asset hull data. 

Default to 'off' as it needs debugging.
user_profiles
Robert Adams 2013-05-21 21:32:30 -07:00
parent 9de3979f5b
commit 2fd8819a04
3 changed files with 55 additions and 4 deletions
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3
OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
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@ -90,6 +90,7 @@ public static class BSParam
public static bool ShouldUseBulletHACD { get; set; }
public static bool ShouldUseSingleConvexHullForPrims { get; set; }
public static bool ShouldUseGImpactShapeForPrims { get; set; }
public static bool ShouldUseAssetHulls { get; set; }
public static float TerrainImplementation { get; set; }
public static int TerrainMeshMagnification { get; private set; }
@ -372,6 +373,8 @@ public static class BSParam
true ),
new ParameterDefn<bool>("ShouldUseGImpactShapeForPrims", "If true, use a GImpact shape for prims with cuts and twists",
false ),
new ParameterDefn<bool>("UseAssetHulls", "If true, use hull if specified in the mesh asset info",
false ),
new ParameterDefn<int>("CrossingFailuresBeforeOutOfBounds", "How forgiving we are about getting into adjactent regions",
5 ),

55
OpenSim/Region/Physics/BulletSPlugin/BSShapes.cs
View File

@ -31,6 +31,7 @@ using System.Text;
using OpenSim.Framework;
using OpenSim.Region.Physics.Manager;
using OpenSim.Region.Physics.Meshing;
using OpenSim.Region.Physics.ConvexDecompositionDotNet;
using OMV = OpenMetaverse;
@ -573,9 +574,56 @@ public class BSShapeHull : BSShape
PrimitiveBaseShape pbs, OMV.Vector3 size, float lod)
{
BulletShape newShape = new BulletShape();
IntPtr hullPtr = IntPtr.Zero;
newShape.shapeKey = newHullKey;
if (BSParam.ShouldUseBulletHACD)
// Pass true for physicalness as this prevents the creation of bounding box which is not needed
IMesh meshData = physicsScene.mesher.CreateMesh(prim.PhysObjectName, pbs, size, lod, true /* isPhysical */, false /* shouldCache */);
// If there is hull data in the mesh asset, build the hull from that
if (meshData != null && BSParam.ShouldUseAssetHulls)
{
Meshmerizer realMesher = physicsScene.mesher as Meshmerizer;
if (realMesher != null)
{
List<List<OMV.Vector3>> allHulls = realMesher.GetConvexHulls(size);
if (allHulls != null)
{
int hullCount = allHulls.Count;
int totalVertices = 1; // include one for the count of the hulls
// Using the structure described for HACD hulls, create the memory sturcture
// to pass the hull data to the creater.
foreach (List<OMV.Vector3> hullVerts in allHulls)
{
totalVertices += 4; // add four for the vertex count and centroid
totalVertices += hullVerts.Count * 3; // one vertex is three dimensions
}
float[] convHulls = new float[totalVertices];
convHulls[0] = (float)hullCount;
int jj = 1;
foreach (List<OMV.Vector3> hullVerts in allHulls)
{
convHulls[jj + 0] = hullVerts.Count;
convHulls[jj + 1] = 0f; // centroid x,y,z
convHulls[jj + 2] = 0f;
convHulls[jj + 3] = 0f;
jj += 4;
foreach (OMV.Vector3 oneVert in hullVerts)
{
convHulls[jj + 0] = oneVert.X;
convHulls[jj + 1] = oneVert.Y;
convHulls[jj + 2] = oneVert.Z;
jj += 3;
}
}
// create the hull data structure in Bullet
newShape = physicsScene.PE.CreateHullShape(physicsScene.World, hullCount, convHulls);
}
}
}
// If no hull specified in the asset and we should use Bullet's HACD approximation...
if (!newShape.HasPhysicalShape && BSParam.ShouldUseBulletHACD)
{
// Build the hull shape from an existing mesh shape.
// The mesh should have already been created in Bullet.
@ -604,11 +652,10 @@ public class BSShapeHull : BSShape
}
physicsScene.DetailLog("{0},BSShapeHull.CreatePhysicalHull,shouldUseBulletHACD,exit,hasBody={1}", prim.LocalID, newShape.HasPhysicalShape);
}
// If no hull specified, use our HACD hull approximation.
if (!newShape.HasPhysicalShape)
{
// Build a new hull in the physical world using the C# HACD algorigthm.
// Pass true for physicalness as this prevents the creation of bounding box which is not needed
IMesh meshData = physicsScene.mesher.CreateMesh(prim.PhysObjectName, pbs, size, lod, true /* isPhysical */, false /* shouldCache */);
if (meshData != null)
{
if (prim.PrimAssetState == BSPhysObject.PrimAssetCondition.Fetched)

1
prebuild.xml
View File

@ -1753,6 +1753,7 @@
<Reference name="OpenSim.Region.CoreModules"/>
<Reference name="OpenSim.Framework.Console"/>
<Reference name="OpenSim.Region.Physics.Manager"/>
<Reference name="OpenSim.Region.Physics.Meshing"/>
<Reference name="OpenSim.Region.Physics.ConvexDecompositionDotNet"/>
<Reference name="BulletXNA.dll" path="../../../../bin/"/>
<Reference name="log4net.dll" path="../../../../bin/"/>