From 938969c811732a3e2faf0229301de286bd12c1a5 Mon Sep 17 00:00:00 2001
From: Andrey Kleshchev <andreykproductengine@lindenlab.com>
Date: Mon, 12 Jul 2021 19:18:25 +0300
Subject: DRTVWR-542 WIP #6

Trying out 'sloppy' variant
---
 indra/llmeshoptimizer/llmeshoptimizer.cpp | 24 ++++++++++++++++++++++++
 indra/llmeshoptimizer/llmeshoptimizer.h   | 12 ++++++++++++
 2 files changed, 36 insertions(+)

(limited to 'indra/llmeshoptimizer')

diff --git a/indra/llmeshoptimizer/llmeshoptimizer.cpp b/indra/llmeshoptimizer/llmeshoptimizer.cpp
index dbf8e5b631..2f3d2491c2 100644
--- a/indra/llmeshoptimizer/llmeshoptimizer.cpp
+++ b/indra/llmeshoptimizer/llmeshoptimizer.cpp
@@ -66,3 +66,27 @@ U64 LLMeshOptimizer::simplify(U16 *destination,
                                  result_error
                                  );
 }
+
+//static
+U64 LLMeshOptimizer::simplifySloppy(U16 *destination,
+                              const U16 *indices,
+                              U64 index_count,
+                              const LLVector4a *vertex_positions,
+                              U64 vertex_count,
+                              U64 target_index_count,
+                              F32 target_error,
+                              F32* result_error
+    )
+{
+    const size_t vertex_stride = 4; // should be either 0 or 4
+    return meshopt_simplifySloppy<unsigned short>(destination,
+                                 indices,
+                                 index_count,
+                                 (const float*)vertex_positions, // verify that it is correct to convert to float
+                                 vertex_count,
+                                 vertex_stride, 
+                                 target_index_count,
+                                 target_error,
+                                 result_error
+                                 );
+}
diff --git a/indra/llmeshoptimizer/llmeshoptimizer.h b/indra/llmeshoptimizer/llmeshoptimizer.h
index 157de0251d..c4250c537d 100644
--- a/indra/llmeshoptimizer/llmeshoptimizer.h
+++ b/indra/llmeshoptimizer/llmeshoptimizer.h
@@ -47,6 +47,18 @@ public:
         U64 target_index_count,
         F32 target_error,
         F32* result_error);
+
+    // returns amount of indices in destiantion
+    // result_error returns how far from original the model is in % if not NULL
+    static U64 simplifySloppy(
+        U16 *destination,
+        const U16 *indices,
+        U64 index_count,
+        const LLVector4a *vertex_positions,
+        U64 vertex_count,
+        U64 target_index_count,
+        F32 target_error,
+        F32* result_error);
 private:
 };
 
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