// Get a reference to a physical shape. Create if it doesn't exist
public static BSShape GetShapeReference(BSScene physicsScene, bool forceRebuild, BSPhysObject prim)
{
BSShape ret = null;
if (prim.PreferredPhysicalShape == BSPhysicsShapeType.SHAPE_CAPSULE)
{
// an avatar capsule is close to a native shape (it is not shared)
ret = BSShapeNative.GetReference(physicsScene, prim, BSPhysicsShapeType.SHAPE_CAPSULE,
FixedShapeKey.KEY_CAPSULE);
physicsScene.DetailLog("{0},BSShape.GetShapeReference,avatarCapsule,shape={1}", prim.LocalID, ret);
}
// Compound shapes are handled special as they are rebuilt from scratch.
// This isn't too great a hardship since most of the child shapes will already been created.
if (ret == null && prim.PreferredPhysicalShape == BSPhysicsShapeType.SHAPE_COMPOUND)
{
// Getting a reference to a compound shape gets you the compound shape with the root prim shape added
ret = BSShapeCompound.GetReference(prim);
physicsScene.DetailLog("{0},BSShapeCollection.CreateGeom,compoundShape,shape={1}", prim.LocalID, ret);
}
if (ret == null)
ret = GetShapeReferenceNonSpecial(physicsScene, forceRebuild, prim);
return ret;
}
// Get a reference to a physical shape. Create if it doesn't exist
public static BSShape GetShapeReference(BSScene physicsScene, bool forceRebuild, BSPhysObject prim)
{
BSShape ret = null;
if (prim.PreferredPhysicalShape == BSPhysicsShapeType.SHAPE_CAPSULE)
{
// an avatar capsule is close to a native shape (it is not shared)
ret = BSShapeNative.GetReference(physicsScene, prim, BSPhysicsShapeType.SHAPE_CAPSULE,
FixedShapeKey.KEY_CAPSULE);
physicsScene.DetailLog("{0},BSShape.GetShapeReference,avatarCapsule,shape={1}", prim.LocalID, ret);
}
// Compound shapes are handled special as they are rebuilt from scratch.
// This isn't too great a hardship since most of the child shapes will already been created.
if (ret == null && prim.PreferredPhysicalShape == BSPhysicsShapeType.SHAPE_COMPOUND)
{
// Getting a reference to a compound shape gets you the compound shape with the root prim shape added
ret = BSShapeCompound.GetReference(prim);
physicsScene.DetailLog("{0},BSShapeCollection.CreateGeom,compoundShape,shape={1}", prim.LocalID, ret);
}
if (ret == null)
{
ret = GetShapeReferenceNonSpecial(physicsScene, forceRebuild, prim);
}
return(ret);
}
// Make this reference to the physical shape go away since native shapes are not shared.
public override void Dereference(BSScene physicsScene)
{
// Native shapes are not tracked and are released immediately
physicsScene.DetailLog("{0},BSShapeCollection.DereferenceShape,deleteNativeShape,shape={1}", BSScene.DetailLogZero, this);
BulletSimAPI.DeleteCollisionShape2(physicsScene.World.ptr, ptr);
ptr = null;
// Garbage collection will free up this instance.
}
private BSShapeNative(BSScene physicsScene, BSPhysObject prim,
BSPhysicsShapeType shapeType, FixedShapeKey shapeKey)
{
ShapeData nativeShapeData = new ShapeData();
nativeShapeData.Type = shapeType;
nativeShapeData.ID = prim.LocalID;
nativeShapeData.Scale = prim.Scale;
nativeShapeData.Size = prim.Scale;
nativeShapeData.MeshKey = (ulong)shapeKey;
nativeShapeData.HullKey = (ulong)shapeKey;
if (shapeType == BSPhysicsShapeType.SHAPE_CAPSULE)
{
ptr = BulletSimAPI.BuildCapsuleShape2(physicsScene.World.ptr, 1f, 1f, prim.Scale);
physicsScene.DetailLog("{0},BSShapeCollection.BuiletPhysicalNativeShape,capsule,scale={1}", prim.LocalID, prim.Scale);
}
else
{
ptr = BulletSimAPI.BuildNativeShape2(physicsScene.World.ptr, nativeShapeData);
}
if (ptr == null)
{
physicsScene.Logger.ErrorFormat("{0} BuildPhysicalNativeShape failed. ID={1}, shape={2}",
LogHeader, prim.LocalID, shapeType);
}
type = shapeType;
key = (UInt64)shapeKey;
}
// Convert the passed heightmap to mesh information suitable for CreateMeshShape2().
// Return 'true' if successfully created.
public static bool ConvertHeightmapToMesh(
BSScene physicsScene,
float[] heightMap, int sizeX, int sizeY, // parameters of incoming heightmap
float extentX, float extentY, // zero based range for output vertices
Vector3 extentBase, // base to be added to all vertices
float magnification, // number of vertices to create between heightMap coords
out int indicesCountO, out int[] indicesO,
out int verticesCountO, out float[] verticesO)
{
bool ret = false;
int indicesCount = 0;
int verticesCount = 0;
int[] indices = new int[0];
float[] vertices = new float[0];
// Simple mesh creation which assumes magnification == 1.
// TODO: do a more general solution that scales, adds new vertices and smoothes the result.
// Create an array of vertices that is sizeX+1 by sizeY+1 (note the loop
// from zero to <= sizeX). The triangle indices are then generated as two triangles
// per heightmap point. There are sizeX by sizeY of these squares. The extra row and
// column of vertices are used to complete the triangles of the last row and column
// of the heightmap.
try
{
// One vertice per heightmap value plus the vertices off the top and bottom edge.
int totalVertices = (sizeX + 1) * (sizeY + 1);
vertices = new float[totalVertices * 3];
int totalIndices = sizeX * sizeY * 6;
indices = new int[totalIndices];
float magX = (float)sizeX / extentX;
float magY = (float)sizeY / extentY;
physicsScene.DetailLog("{0},BSTerrainMesh.ConvertHeightMapToMesh,totVert={1},totInd={2},extentBase={3},magX={4},magY={5}",
BSScene.DetailLogZero, totalVertices, totalIndices, extentBase, magX, magY);
float minHeight = float.MaxValue;
// Note that sizeX+1 vertices are created since there is land between this and the next region.
for (int yy = 0; yy <= sizeY; yy++)
{
for (int xx = 0; xx <= sizeX; xx++) // Hint: the "<=" means we go around sizeX + 1 times
{
int offset = yy * sizeX + xx;
// Extend the height with the height from the last row or column
if (yy == sizeY) offset -= sizeX;
if (xx == sizeX) offset -= 1;
float height = heightMap[offset];
minHeight = Math.Min(minHeight, height);
vertices[verticesCount + 0] = (float)xx * magX + extentBase.X;
vertices[verticesCount + 1] = (float)yy * magY + extentBase.Y;
vertices[verticesCount + 2] = height + extentBase.Z;
verticesCount += 3;
}
}
verticesCount = verticesCount / 3;
for (int yy = 0; yy < sizeY; yy++)
{
for (int xx = 0; xx < sizeX; xx++)
{
int offset = yy * (sizeX + 1) + xx;
// Each vertices is presumed to be the upper left corner of a box of two triangles
indices[indicesCount + 0] = offset;
indices[indicesCount + 1] = offset + 1;
indices[indicesCount + 2] = offset + sizeX + 1; // accounting for the extra column
indices[indicesCount + 3] = offset + 1;
indices[indicesCount + 4] = offset + sizeX + 2;
indices[indicesCount + 5] = offset + sizeX + 1;
indicesCount += 6;
}
}
ret = true;
}
catch (Exception e)
{
physicsScene.Logger.ErrorFormat("{0} Failed conversion of heightmap to mesh. For={1}/{2}, e={3}",
LogHeader, physicsScene.RegionName, extentBase, e);
}
indicesCountO = indicesCount;
indicesO = indices;
verticesCountO = verticesCount;
verticesO = vertices;
return ret;
}
// Convert the passed heightmap to mesh information suitable for CreateMeshShape2().
// Return 'true' if successfully created.
public static bool ConvertHeightmapToMesh(
BSScene physicsScene,
float[] heightMap, int sizeX, int sizeY, // parameters of incoming heightmap
float extentX, float extentY, // zero based range for output vertices
Vector3 extentBase, // base to be added to all vertices
float magnification, // number of vertices to create between heightMap coords
out int indicesCountO, out int[] indicesO,
out int verticesCountO, out float[] verticesO)
{
bool ret = false;
int indicesCount = 0;
int verticesCount = 0;
int[] indices = new int[0];
float[] vertices = new float[0];
// Simple mesh creation which assumes magnification == 1.
// TODO: do a more general solution that scales, adds new vertices and smoothes the result.
// Create an array of vertices that is sizeX+1 by sizeY+1 (note the loop
// from zero to <= sizeX). The triangle indices are then generated as two triangles
// per heightmap point. There are sizeX by sizeY of these squares. The extra row and
// column of vertices are used to complete the triangles of the last row and column
// of the heightmap.
try
{
// One vertice per heightmap value plus the vertices off the top and bottom edge.
int totalVertices = (sizeX + 1) * (sizeY + 1);
vertices = new float[totalVertices * 3];
int totalIndices = sizeX * sizeY * 6;
indices = new int[totalIndices];
float magX = (float)sizeX / extentX;
float magY = (float)sizeY / extentY;
physicsScene.DetailLog("{0},BSTerrainMesh.ConvertHeightMapToMesh,totVert={1},totInd={2},extentBase={3},magX={4},magY={5}",
BSScene.DetailLogZero, totalVertices, totalIndices, extentBase, magX, magY);
float minHeight = float.MaxValue;
// Note that sizeX+1 vertices are created since there is land between this and the next region.
for (int yy = 0; yy <= sizeY; yy++)
{
for (int xx = 0; xx <= sizeX; xx++) // Hint: the "<=" means we go around sizeX + 1 times
{
int offset = yy * sizeX + xx;
// Extend the height with the height from the last row or column
if (yy == sizeY)
{
offset -= sizeX;
}
if (xx == sizeX)
{
offset -= 1;
}
float height = heightMap[offset];
minHeight = Math.Min(minHeight, height);
vertices[verticesCount + 0] = (float)xx * magX + extentBase.X;
vertices[verticesCount + 1] = (float)yy * magY + extentBase.Y;
vertices[verticesCount + 2] = height + extentBase.Z;
verticesCount += 3;
}
}
verticesCount = verticesCount / 3;
for (int yy = 0; yy < sizeY; yy++)
{
for (int xx = 0; xx < sizeX; xx++)
{
int offset = yy * (sizeX + 1) + xx;
// Each vertices is presumed to be the upper left corner of a box of two triangles
indices[indicesCount + 0] = offset;
indices[indicesCount + 1] = offset + 1;
indices[indicesCount + 2] = offset + sizeX + 1; // accounting for the extra column
indices[indicesCount + 3] = offset + 1;
indices[indicesCount + 4] = offset + sizeX + 2;
indices[indicesCount + 5] = offset + sizeX + 1;
indicesCount += 6;
}
}
ret = true;
}
catch (Exception e)
{
physicsScene.Logger.ErrorFormat("{0} Failed conversion of heightmap to mesh. For={1}/{2}, e={3}",
LogHeader, physicsScene.RegionName, extentBase, e);
}
indicesCountO = indicesCount;
indicesO = indices;
verticesCountO = verticesCount;
verticesO = vertices;
return(ret);
}
