diff options
Diffstat (limited to 'intern/cycles/render/graph.cpp')
| -rw-r--r-- | intern/cycles/render/graph.cpp | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/intern/cycles/render/graph.cpp b/intern/cycles/render/graph.cpp index fb2e34c2fc7..096de878e51 100644 --- a/intern/cycles/render/graph.cpp +++ b/intern/cycles/render/graph.cpp @@ -23,8 +23,9 @@ #include "util/util_algorithm.h" #include "util/util_foreach.h" -#include "util/util_queue.h" #include "util/util_logging.h" +#include "util/util_md5.h" +#include "util/util_queue.h" CCL_NAMESPACE_BEGIN @@ -683,6 +684,32 @@ void ShaderGraph::break_cycles(ShaderNode *node, vector<bool>& visited, vector<b on_stack[node->id] = false; } +void ShaderGraph::compute_displacement_hash() +{ + /* Compute hash of all nodes linked to displacement, to detect if we need + * to recompute displacement when shader nodes change. */ + ShaderInput *displacement_in = output()->input("Displacement"); + + if(!displacement_in->link) { + displacement_hash = ""; + return; + } + + ShaderNodeSet nodes_displace; + find_dependencies(nodes_displace, displacement_in); + + MD5Hash md5; + foreach(ShaderNode *node, nodes_displace) { + node->hash(md5); + foreach(ShaderInput *input, node->inputs) { + int link_id = (input->link) ? input->link->parent->id : 0; + md5.append((uint8_t*)&link_id, sizeof(link_id)); + } + } + + displacement_hash = md5.get_hex(); +} + void ShaderGraph::clean(Scene *scene) { /* Graph simplification */ |