From 00073651d420c852b271127fe453d2170471321a Mon Sep 17 00:00:00 2001
From: Charlie Jolly <charlie>
Date: Fri, 4 Jun 2021 16:53:50 +0100
Subject: Nodes: Add Multiply Add to Vector Math nodes

Cycles, Eevee, OSL, Geo, Attribute

This operator provides consistency with the standard math node. Allows users to use a single node instead of two nodes for this common operation.

Reviewed By: HooglyBoogly, brecht

Differential Revision: https://developer.blender.org/D10808
---
 intern/cycles/kernel/svm/svm_math.h      | 3 ++-
 intern/cycles/kernel/svm/svm_math_util.h | 3 +++
 intern/cycles/kernel/svm/svm_types.h     | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

(limited to 'intern/cycles/kernel/svm')

diff --git a/intern/cycles/kernel/svm/svm_math.h b/intern/cycles/kernel/svm/svm_math.h
index dda2e50f916..733ea28f9e5 100644
--- a/intern/cycles/kernel/svm/svm_math.h
+++ b/intern/cycles/kernel/svm/svm_math.h
@@ -58,7 +58,8 @@ ccl_device void svm_node_vector_math(KernelGlobals *kg,
   float3 vector;
 
   /* 3 Vector Operators */
-  if (type == NODE_VECTOR_MATH_WRAP || type == NODE_VECTOR_MATH_FACEFORWARD) {
+  if (type == NODE_VECTOR_MATH_WRAP || type == NODE_VECTOR_MATH_FACEFORWARD ||
+      type == NODE_VECTOR_MATH_MULTIPLY_ADD) {
     uint4 extra_node = read_node(kg, offset);
     c = stack_load_float3(stack, extra_node.x);
   }
diff --git a/intern/cycles/kernel/svm/svm_math_util.h b/intern/cycles/kernel/svm/svm_math_util.h
index 19fb1da5a1f..9e654f2247f 100644
--- a/intern/cycles/kernel/svm/svm_math_util.h
+++ b/intern/cycles/kernel/svm/svm_math_util.h
@@ -52,6 +52,9 @@ ccl_device void svm_vector_math(float *value,
     case NODE_VECTOR_MATH_FACEFORWARD:
       *vector = faceforward(a, b, c);
       break;
+    case NODE_VECTOR_MATH_MULTIPLY_ADD:
+      *vector = a * b + c;
+      break;
     case NODE_VECTOR_MATH_DOT_PRODUCT:
       *value = dot(a, b);
       break;
diff --git a/intern/cycles/kernel/svm/svm_types.h b/intern/cycles/kernel/svm/svm_types.h
index 64a8f82a094..062afcfa5ac 100644
--- a/intern/cycles/kernel/svm/svm_types.h
+++ b/intern/cycles/kernel/svm/svm_types.h
@@ -341,6 +341,7 @@ typedef enum NodeVectorMathType {
   NODE_VECTOR_MATH_TANGENT,
   NODE_VECTOR_MATH_REFRACT,
   NODE_VECTOR_MATH_FACEFORWARD,
+  NODE_VECTOR_MATH_MULTIPLY_ADD,
 } NodeVectorMathType;
 
 typedef enum NodeClampType {
-- 
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