Cycles: add Point Info node

With (center) position, radius and random value outputs.

Eevee does not yet support rendering point clouds, but an untested
implementation of this node was added for when it does.

Ref T92573

3 files changed, 66 insertions, 3 deletions

diff --git a/intern/cycles/scene/scene.cpp b/intern/cycles/scene/scene.cpp
index 1963ebbbb19..b5b8eee24a7 100644
--- a/intern/cycles/scene/scene.cpp
+++ b/intern/cycles/scene/scene.cpp
@@ -570,7 +570,6 @@ static void log_kernel_features(const uint features)
           << "\n";
   VLOG(2) << "Use Emission " << string_from_bool(features & KERNEL_FEATURE_NODE_EMISSION) << "\n";
   VLOG(2) << "Use Volume " << string_from_bool(features & KERNEL_FEATURE_NODE_VOLUME) << "\n";
-  VLOG(2) << "Use Hair " << string_from_bool(features & KERNEL_FEATURE_NODE_HAIR) << "\n";
   VLOG(2) << "Use Bump " << string_from_bool(features & KERNEL_FEATURE_NODE_BUMP) << "\n";
   VLOG(2) << "Use Voronoi " << string_from_bool(features & KERNEL_FEATURE_NODE_VORONOI_EXTRA)
           << "\n";
diff --git a/intern/cycles/scene/shader_nodes.cpp b/intern/cycles/scene/shader_nodes.cpp
index e8316ad41b4..40d2e0ba814 100644
--- a/intern/cycles/scene/shader_nodes.cpp
+++ b/intern/cycles/scene/shader_nodes.cpp
@@ -4466,6 +4466,59 @@ void HairInfoNode::compile(OSLCompiler &compiler)
   compiler.add(this, "node_hair_info");
 }
 
+/* Point Info */
+
+NODE_DEFINE(PointInfoNode)
+{
+  NodeType *type = NodeType::add("point_info", create, NodeType::SHADER);
+
+  SOCKET_OUT_POINT(position, "Position");
+  SOCKET_OUT_FLOAT(radius, "Radius");
+  SOCKET_OUT_FLOAT(random, "Random");
+
+  return type;
+}
+
+PointInfoNode::PointInfoNode() : ShaderNode(get_node_type())
+{
+}
+
+void PointInfoNode::attributes(Shader *shader, AttributeRequestSet *attributes)
+{
+  if (shader->has_surface_link()) {
+    if (!output("Random")->links.empty())
+      attributes->add(ATTR_STD_POINT_RANDOM);
+  }
+
+  ShaderNode::attributes(shader, attributes);
+}
+
+void PointInfoNode::compile(SVMCompiler &compiler)
+{
+  ShaderOutput *out;
+
+  out = output("Position");
+  if (!out->links.empty()) {
+    compiler.add_node(NODE_POINT_INFO, NODE_INFO_POINT_POSITION, compiler.stack_assign(out));
+  }
+
+  out = output("Radius");
+  if (!out->links.empty()) {
+    compiler.add_node(NODE_POINT_INFO, NODE_INFO_POINT_RADIUS, compiler.stack_assign(out));
+  }
+
+  out = output("Random");
+  if (!out->links.empty()) {
+    int attr = compiler.attribute(ATTR_STD_POINT_RANDOM);
+    compiler.add_node(NODE_ATTR, attr, compiler.stack_assign(out), NODE_ATTR_OUTPUT_FLOAT);
+  }
+}
+
+void PointInfoNode::compile(OSLCompiler &compiler)
+{
+  compiler.add(this, "node_point_info");
+}
+
 /* Volume Info */
 
 NODE_DEFINE(VolumeInfoNode)
diff --git a/intern/cycles/scene/shader_nodes.h b/intern/cycles/scene/shader_nodes.h
index 0faefd3041f..a8d5bdcf157 100644
--- a/intern/cycles/scene/shader_nodes.h
+++ b/intern/cycles/scene/shader_nodes.h
@@ -1005,9 +1005,20 @@ class HairInfoNode : public ShaderNode {
   {
     return true;
   }
-  virtual int get_feature()
+};
+
+class PointInfoNode : public ShaderNode {
+ public:
+  SHADER_NODE_CLASS(PointInfoNode)
+
+  void attributes(Shader *shader, AttributeRequestSet *attributes);
+  bool has_attribute_dependency()
+  {
+    return true;
+  }
+  bool has_spatial_varying()
   {
-    return ShaderNode::get_feature() | KERNEL_FEATURE_NODE_HAIR;
+    return true;
   }
 };