Commit: d165b1b266b9d19775ee73733b63824b8551aea6
Author: Sergey Sharybin
Date: Fri Sep 19 15:21:32 2014 +0600
Branches: master
https://developer.blender.org/rBd165b1b266b9d19775ee73733b63824b8551aea6
Cycles: Add method to dump current shader graph to the graphiz file
This is rather useful to see how good optimization went and so.
Currently uses quite simple notation: shader nodes are nodes on the
graph, connects between graph nodes are named by the sockets names,
so i.e. connection between BSDF and Mix would be named bsdf:closure1.
Could be improved in the feature to draw fancier graph, but it's good
enough already.
Use in the following way:
- To create graphix file call graph->dump_graph("graph.dot")
- To visualize the grapf call: dot -Tpng graph.dot -o graph.png
===================================================================
M intern/cycles/render/graph.cpp
M intern/cycles/render/graph.h
===================================================================
diff --git a/intern/cycles/render/graph.cpp b/intern/cycles/render/graph.cpp
index d90e5c4..45b0883 100644
--- a/intern/cycles/render/graph.cpp
+++ b/intern/cycles/render/graph.cpp
@@ -835,5 +835,47 @@ void ShaderGraph::transform_multi_closure(ShaderNode
*node, ShaderOutput *weight
}
}
+void ShaderGraph::dump_graph(const char *filename)
+{
+ FILE *fd = fopen(filename, "w");
+
+ if(fd == NULL) {
+ printf("Error opening file for dumping the graph: %s\n",
filename);
+ return;
+ }
+
+ fprintf(fd, "digraph dependencygraph {\n");
+ fprintf(fd, "ranksep=1.5\n");
+ fprintf(fd, "splines=false\n");
+
+ foreach(ShaderNode *node, nodes) {
+ fprintf(fd, "// NODE: %p\n", node);
+ fprintf(fd,
+ "\"%p\" [shape=record,label=\"%s\"]\n",
+ node,
+ node->name.c_str());
+ }
+
+ foreach(ShaderNode *node, nodes) {
+ foreach(ShaderOutput *output, node->outputs) {
+ foreach(ShaderInput *input, output->links) {
+ fprintf(fd,
+ "// CONNECTION: %p->%p (%s:%s)\n",
+ output,
+ input,
+ output->name, input->name);
+ fprintf(fd,
+ "\"%p\":s -> \"%p\":n
[label=\"%s:%s\"]\n",
+ output->parent,
+ input->parent,
+ output->name, input->name);
+ }
+ }
+ }
+
+ fprintf(fd, "}\n");
+ fclose(fd);
+}
+
CCL_NAMESPACE_END
diff --git a/intern/cycles/render/graph.h b/intern/cycles/render/graph.h
index 7bfd51c..7b95703 100644
--- a/intern/cycles/render/graph.h
+++ b/intern/cycles/render/graph.h
@@ -250,6 +250,8 @@ public:
void remove_unneeded_nodes();
void finalize(bool do_bump = false, bool do_osl = false);
+ void dump_graph(const char *filename);
+
protected:
typedef pair<ShaderNode* const, ShaderNode*> NodePair;
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