/// <summary>
/// This overrides the result for a single pair of materials. It's
/// recommended that you add all materials first. Order of ids
/// doesn't matter
/// </summary>
/// <param name="id1"></param>
/// <param name="id2"></param>
/// <param name="pairProperties"></param>
public void SetMaterialPairProperties(int id1, int id2, MaterialPairProperties pairProperties)
{
int key01 = id1 << 16 | id2;
int key10 = id2 << 16 | id1;
materialPairs[key01] = materialPairs[key10] = pairProperties;
}
/// <summary>
/// This adds/overrides a material, and sets all the pairs for
/// existing materials using some sensible heuristic
/// </summary>
/// <param name="id"></param>
/// <param name="properties"></param>
public void SetMaterialProperties(int id, MaterialProperties properties)
{
materials[id] = properties;
foreach (KeyValuePair<int, MaterialProperties> it in materials)
{
int otherID = it.Key;
MaterialProperties mat = it.Value;
int key01 = otherID << 16 | id;
int key10 = id << 16 | otherID;
materialPairs[key01] = materialPairs[key10] =
new MaterialPairProperties(properties.Elasticity * mat.Elasticity,
properties.StaticRoughness * mat.StaticRoughness,
properties.DynamicRoughness * mat.DynamicRoughness);
}
}
private unsafe void Init(CollDetectInfo info, Vector3 dirToBody0, SmallCollPointInfo* pointInfos, int numPointInfos)
{
this.SkinInfo = info;
this.dirToBody0 = dirToBody0;
int ID0 = info.Skin0.GetMaterialID(info.IndexPrim0);
int ID1 = info.Skin1.GetMaterialID(info.IndexPrim1);
MaterialTable matTable = info.Skin0.CollisionSystem.MaterialTable;
if (ID0 == (int)MaterialTable.MaterialID.UserDefined || (int)ID1 == (int)MaterialTable.MaterialID.UserDefined)
{
MaterialProperties prop0, prop1;
if (ID0 == (int)MaterialTable.MaterialID.UserDefined)
prop0 = info.Skin0.GetMaterialProperties(info.IndexPrim0);
else
prop0 = matTable.GetMaterialProperties(ID0);
if (ID1 == (int)MaterialTable.MaterialID.UserDefined)
prop1 = info.Skin1.GetMaterialProperties(info.IndexPrim1);
else
prop1 = matTable.GetMaterialProperties(ID1);
MatPairProperties.Restitution = prop0.Elasticity * prop1.Elasticity;
MatPairProperties.StaticFriction = prop0.StaticRoughness * prop1.StaticRoughness;
MatPairProperties.DynamicFriction = prop0.DynamicRoughness * prop1.DynamicRoughness;
}
else
{
MatPairProperties = matTable.GetPairProperties(ID0, ID1);
}
numPointInfos = (numPointInfos > MaxCollisionPoints) ? MaxCollisionPoints : numPointInfos;
NumCollPts = 0;
for (int i = 0; i < numPointInfos; ++i)
{
if (freePtInfos.Count == 0)
{
freePtInfos.Push(new CollPointInfo());
}
this.PointInfo[NumCollPts] = freePtInfos.Pop();
this.PointInfo[NumCollPts++].Init( ref pointInfos[i] );
}
}
