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Forbid recursive connections in visual shader

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This commit is contained in:
Yuri Roubinsky 2020-01-20 17:46:49 +03:00
parent cfeba2c899
commit a8ab4e3357
2 changed files with 33 additions and 0 deletions
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30
scene/resources/visual_shader.cpp
View file

@ -378,6 +378,9 @@ void VisualShader::remove_node(Type p_type, int p_id) {
List<Connection>::Element *N = E->next();
if (E->get().from_node == p_id || E->get().to_node == p_id) {
g->connections.erase(E);
if (E->get().from_node == p_id) {
g->nodes[E->get().to_node].prev_connected_nodes.erase(p_id);
}
}
E = N;
}
@ -399,6 +402,25 @@ bool VisualShader::is_node_connection(Type p_type, int p_from_node, int p_from_p
return false;
}
bool VisualShader::is_nodes_connected_relatively(const Graph *p_graph, int p_node, int p_target) const {
bool result = false;
const VisualShader::Node &node = p_graph->nodes[p_node];
for (const List<int>::Element *E = node.prev_connected_nodes.front(); E; E = E->next()) {
if (E->get() == p_target) {
return true;
}
result = is_nodes_connected_relatively(p_graph, E->get(), p_target);
if (result) {
break;
}
}
return result;
}
bool VisualShader::can_connect_nodes(Type p_type, int p_from_node, int p_from_port, int p_to_node, int p_to_port) const {
ERR_FAIL_INDEX_V(p_type, TYPE_MAX, false);
@ -433,6 +455,9 @@ bool VisualShader::can_connect_nodes(Type p_type, int p_from_node, int p_from_po
}
}
if (is_nodes_connected_relatively(g, p_from_node, p_to_node))
return false;
return true;
}
@ -449,6 +474,8 @@ void VisualShader::connect_nodes_forced(Type p_type, int p_from_node, int p_from
c.to_node = p_to_node;
c.to_port = p_to_port;
g->connections.push_back(c);
g->nodes[p_to_node].prev_connected_nodes.push_back(p_from_node);
_queue_update();
}
@ -479,6 +506,7 @@ Error VisualShader::connect_nodes(Type p_type, int p_from_node, int p_from_port,
c.to_node = p_to_node;
c.to_port = p_to_port;
g->connections.push_back(c);
g->nodes[p_to_node].prev_connected_nodes.push_back(p_from_node);
_queue_update();
return OK;
@ -492,6 +520,7 @@ void VisualShader::disconnect_nodes(Type p_type, int p_from_node, int p_from_por
if (E->get().from_node == p_from_node && E->get().from_port == p_from_port && E->get().to_node == p_to_node && E->get().to_port == p_to_port) {
g->connections.erase(E);
g->nodes[p_to_node].prev_connected_nodes.erase(p_from_node);
_queue_update();
return;
}
@ -1326,6 +1355,7 @@ void VisualShader::_input_type_changed(Type p_type, int p_id) {
List<Connection>::Element *N = E->next();
if (E->get().from_node == p_id) {
g->connections.erase(E);
g->nodes[E->get().to_node].prev_connected_nodes.erase(p_id);
}
E = N;
}

3
scene/resources/visual_shader.h
View file

@ -65,6 +65,7 @@ private:
struct Node {
Ref<VisualShaderNode> node;
Vector2 position;
List<int> prev_connected_nodes;
};
struct Graph {
@ -135,6 +136,8 @@ public:
void remove_node(Type p_type, int p_id);
bool is_node_connection(Type p_type, int p_from_node, int p_from_port, int p_to_node, int p_to_port) const;
bool is_nodes_connected_relatively(const Graph *p_graph, int p_node, int p_target) const;
bool can_connect_nodes(Type p_type, int p_from_node, int p_from_port, int p_to_node, int p_to_port) const;
Error connect_nodes(Type p_type, int p_from_node, int p_from_port, int p_to_node, int p_to_port);
void disconnect_nodes(Type p_type, int p_from_node, int p_from_port, int p_to_node, int p_to_port);