From 84fc75cc71f8eb0f9953c69aa27d0e4c995baa73 Mon Sep 17 00:00:00 2001
From: Seb James <sebj_coder3@pm.me>
Date: Tue, 16 Sep 2025 10:36:12 +0100
Subject: [PATCH 1/2] Adds vpos and vnorm accessor scheme

---
 mplot/VisualModelBase.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/mplot/VisualModelBase.h b/mplot/VisualModelBase.h
index 5b4e0ea4..dcb8279f 100644
--- a/mplot/VisualModelBase.h
+++ b/mplot/VisualModelBase.h
@@ -449,6 +449,25 @@ namespace mplot {
             }
             return base64::encode (_bytes);
         }
+        std::size_t next_vpos_idx = 0;
+        void init_vpos_accessor() { this->next_vpos_idx = 0; }
+        sm::vec<float, 3> get_next_vpos()
+        {
+            sm::vec<float, 3> pos;
+            pos.set_from (std::numeric_limits<float>::max());
+            if (this->next_vpos_idx < this->vertexPositions.size()) {
+                sm::vec<float, 4> tmp = {
+                    this->vertexPositions[this->next_vpos_idx],
+                    this->vertexPositions[this->next_vpos_idx + 1],
+                    this->vertexPositions[this->next_vpos_idx + 2]
+                };
+
+                pos = (this->viewmatrix * tmp).less_one_dim();
+                this->next_vpos_idx += 3;
+            }
+            return pos;
+        }
+
         std::size_t vcol_size() { return this->vertexColors.size(); }
         std::string vcol_max() { return this->vcol_maxes.str_mat(); }
         std::string vcol_min() { return this->vcol_mins.str_mat(); }
@@ -485,6 +504,20 @@ namespace mplot {
             }
             return base64::encode (_bytes);
         }
+        std::size_t next_vnorm_idx = 0;
+        void init_vnorm_accessor() { this->next_vnorm_idx = 0; }
+        sm::vec<float, 3> get_next_vnorm()
+        {
+            sm::vec<float, 3> pos;
+            pos.set_from (std::numeric_limits<float>::max());
+            if (this->next_vnorm_idx < this->vertexPositions.size()) {
+                pos = { this->vertexPositions[this->next_vnorm_idx],
+                    this->vertexPositions[this->next_vnorm_idx + 1],
+                    this->vertexPositions[this->next_vnorm_idx + 2] };
+                this->next_vnorm_idx += 3;
+            }
+            return pos;
+        }
         // end Visual::savegltf() methods
 
         // A VisualModel may be given a name

From bf2c7a4243ef4595cedba6717c0283c6eee5f91f Mon Sep 17 00:00:00 2001
From: Seb James <sebj_coder3@pm.me>
Date: Tue, 16 Sep 2025 10:36:48 +0100
Subject: [PATCH 2/2] Latest maths for accessor scheme

---
 maths | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/maths b/maths
index a29798cc..9e5fb13a 160000
--- a/maths
+++ b/maths
@@ -1 +1 @@
-Subproject commit a29798cc764ea1bdbef4682a3c231ab9a6da03ab
+Subproject commit 9e5fb13a633c6039e2088cbe36ddfd27395fe527