public void UpdateSoftBody(SoftBody softBody, ShapeData shapeData)
{
// Could just allocate a Vector3 array here at each frame, but reusing shapeData.SoftBodyData is faster.
// Probably uses more memory though.
softBody.GetVertexNormalData(ref shapeData.SoftBodyData);
shapeData.SetDynamicVertexBuffer(device, shapeData.SoftBodyData);
if (softBody.Faces.Count == 0 && softBody.Tetras.Count == 0)
{
shapeData.PrimitiveTopology = PrimitiveTopology.LineList;
}
}
ShapeData CreateShape(CollisionShape shape)
{
ShapeData shapeData = new ShapeData();
uint[] indices;
Vector3[] vertices = CreateShape(shape, out indices);
shapeData.VertexCount = vertices.Length / 2;
shapeData.SetVertexBuffer(device, vertices);
if (indices != null)
{
shapeData.IndexCount = indices.Length;
ushort[] indices_s = CompactIndexBuffer(indices);
if (indices_s != null)
{
shapeData.SetIndexBuffer(device, indices_s);
}
else
{
shapeData.SetIndexBuffer(device, indices);
}
}
return shapeData;
}
ShapeData InitShapeData(CollisionShape shape)
{
ShapeData shapeData;
if (shapes.TryGetValue(shape, out shapeData) == false)
{
if (shape.ShapeType == BroadphaseNativeType.SoftBodyShape)
{
shapeData = new ShapeData();
}
else
{
shapeData = CreateShape(shape);
}
// Create an initial instance data buffer for a single instance
instanceDataDesc.SizeInBytes = InstanceData.SizeInBytes;
shapeData.InstanceDataBuffer = new Buffer(device, instanceDataDesc);
shapeData.BufferBindings[1] = new VertexBufferBinding(shapeData.InstanceDataBuffer, instanceDataDesc.SizeInBytes, 0);
shapes.Add(shape, shapeData);
}
return shapeData;
}
public void InitInstancedRender(AlignedCollisionObjectArray objects)
{
// Clear instance data
foreach (ShapeData s in shapes.Values)
{
s.Instances.Clear();
}
// Gather instance data
int i = objects.Count - 1;
for (; i >= 0; i--)
{
var colObj = objects[i];
var shape = colObj.CollisionShape;
if (shape.ShapeType == BroadphaseNativeType.SoftBodyShape)
{
if (demo.IsDebugDrawEnabled)
{
continue;
}
InitSoftBodyInstance(colObj as SoftBody, shape);
}
else
{
Matrix transform;
colObj.GetWorldTransform(out transform);
InitRigidBodyInstance(colObj, shape, ref transform);
}
}
foreach (KeyValuePair <CollisionShape, ShapeData> sh in shapes)
{
ShapeData s = sh.Value;
int instanceCount = s.Instances.Count;
// Is the instance buffer the right size?
if (s.InstanceDataBuffer.Description.SizeInBytes != instanceCount * InstanceData.SizeInBytes)
{
// No, recreate it
s.InstanceDataBuffer.Dispose();
// Remember shapes that have no instances,
// shape is removed after iteration over shapes
if (instanceCount == 0)
{
if (s.IndexBuffer != null)
{
s.IndexBuffer.Dispose();
}
s.VertexBuffer.Dispose();
removeList.Add(sh.Key);
continue;
}
instanceDataDesc.SizeInBytes = instanceCount * InstanceData.SizeInBytes;
s.InstanceDataBuffer = new Buffer(device, instanceDataDesc);
s.BufferBindings[1] = new VertexBufferBinding(s.InstanceDataBuffer, InstanceData.SizeInBytes, 0);
}
// Copy the instance list over to the instance array
InstanceData[] instanceArray = s.InstanceArray;
if (instanceArray.Length != instanceCount)
{
instanceArray = new InstanceData[instanceCount];
s.InstanceArray = instanceArray;
}
s.Instances.CopyTo(instanceArray);
DataBox db = device.ImmediateContext.MapSubresource(s.InstanceDataBuffer, 0, MapMode.WriteDiscard, SharpDX.Direct3D11.MapFlags.None);
SharpDX.Utilities.Write(db.DataPointer, instanceArray, 0, instanceArray.Length);
device.ImmediateContext.UnmapSubresource(s.InstanceDataBuffer, 0);
}
// Remove shapes that had no instances
if (removeList.Count != 0)
{
foreach (var shape in removeList)
{
shapes.Remove(shape);
}
removeList.Clear();
}
}