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Geometry Nodes: handle same socket being linked to input more than once better 

Note, this does not allow users to connect the same socket more than once to
a multi-input-socket in the UI. However, the situation could still happen when
using node muting.
This commit is contained in:
Jacques Lucke 2021-03-10 11:12:38 +01:00
parent 70e73974b5
commit f247a14468
1 changed files with 25 additions and 7 deletions
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32
source/blender/modifiers/intern/MOD_nodes.cc
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@ -306,12 +306,7 @@ class GeometryNodesEvaluator {
/* Multi-input sockets contain a vector of inputs. */
if (socket_to_compute->is_multi_input_socket()) {
Vector<GMutablePointer> values;
for (const DSocket &from_socket : from_sockets) {
GMutablePointer value = get_input_from_incoming_link(socket_to_compute, from_socket);
values.append(value);
}
return values;
return this->get_inputs_from_incoming_links(socket_to_compute, from_sockets);
}
if (from_sockets.is_empty()) {
@ -325,6 +320,29 @@ class GeometryNodesEvaluator {
return {value};
}
Vector<GMutablePointer> get_inputs_from_incoming_links(const DInputSocket socket_to_compute,
const Span<DSocket> from_sockets)
{
Vector<GMutablePointer> values;
for (const int i : from_sockets.index_range()) {
const DSocket from_socket = from_sockets[i];
const int first_occurence = from_sockets.take_front(i).first_index_try(from_socket);
if (first_occurence == -1) {
values.append(this->get_input_from_incoming_link(socket_to_compute, from_socket));
}
else {
/* If the same from-socket occures more than once, we make a copy of the first value. This
* can happen when a node linked to a multi-input-socket is muted. */
GMutablePointer value = values[first_occurence];
const CPPType *type = value.type();
void *copy_buffer = allocator_.allocate(type->size(), type->alignment());
type->copy_to_uninitialized(value.get(), copy_buffer);
values.append({type, copy_buffer});
}
}
return values;
}
GMutablePointer get_input_from_incoming_link(const DInputSocket socket_to_compute,
const DSocket from_socket)
{
@ -500,7 +518,7 @@ class GeometryNodesEvaluator {
/* For all sockets that are linked with the from_socket push the value to their node. */
Vector<DInputSocket> to_sockets_all;
from_socket.foreach_target_socket(
[&](DInputSocket to_socket) { to_sockets_all.append(to_socket); });
[&](DInputSocket to_socket) { to_sockets_all.append_non_duplicates(to_socket); });
const CPPType &from_type = *value_to_forward.type();
Vector<DInputSocket> to_sockets_same_type;