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Cycles Volume Render: optimization to avoid exporting surface attributes when

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only a volume shader is used.
This commit is contained in:
Brecht Van Lommel
2013-12-31 17:30:34 +01:00
parent 9939ec06dd
commit 6b03f92aa7
7 changed files with 88 additions and 63 deletions
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11
intern/cycles/render/shader.cpp
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@@ -93,15 +93,24 @@ void Shader::tag_update(Scene *scene)
if(use_mis && has_surface_emission)
scene->light_manager->need_update = true;
/* quick detection of which kind of shaders we have to avoid loading
* e.g. surface attributes when there is only a volume shader. this could
* be more fine grained but it's better than nothing */
OutputNode *output = graph->output();
has_surface = has_surface || output->input("Surface")->link;
has_volume = has_volume || output->input("Volume")->link;
has_displacement = has_displacement || output->input("Displacement")->link;
/* get requested attributes. this could be optimized by pruning unused
* nodes here already, but that's the job of the shader manager currently,
* and may not be so great for interactive rendering where you temporarily
* disconnect a node */
AttributeRequestSet prev_attributes = attributes;
attributes.clear();
foreach(ShaderNode *node, graph->nodes)
node->attributes(&attributes);
node->attributes(this, &attributes);
/* compare if the attributes changed, mesh manager will check
* need_update_attributes, update the relevant meshes and clear it. */