From 1a1793244002effe46cedf63180de60f4bc69a9a Mon Sep 17 00:00:00 2001
From: Andrey Kleshchev <andreykproductengine@lindenlab.com>
Date: Wed, 4 Aug 2021 21:14:00 +0300
Subject: DRTVWR-542 Automated method selection

Normally simplification methods apply for whole upload, but this one selects methods per model or per face.
---
 indra/llmeshoptimizer/llmeshoptimizer.cpp | 97 +++++++++++++++++--------------
 indra/llmeshoptimizer/llmeshoptimizer.h   | 21 +++----
 2 files changed, 61 insertions(+), 57 deletions(-)

(limited to 'indra/llmeshoptimizer')

diff --git a/indra/llmeshoptimizer/llmeshoptimizer.cpp b/indra/llmeshoptimizer/llmeshoptimizer.cpp
index 8097a05511..a879389c5a 100644
--- a/indra/llmeshoptimizer/llmeshoptimizer.cpp
+++ b/indra/llmeshoptimizer/llmeshoptimizer.cpp
@@ -67,19 +67,36 @@ U64 LLMeshOptimizer::simplifyU32(U32 *destination,
     U64 vertex_positions_stride,
     U64 target_index_count,
     F32 target_error,
+    bool sloppy,
     F32* result_error
 )
 {
-    return meshopt_simplify<unsigned int>(destination,
-        indices,
-        index_count,
-        (const float*)vertex_positions,
-        vertex_count,
-        vertex_positions_stride,
-        target_index_count,
-        target_error,
-        result_error
-        );
+    if (sloppy)
+    {
+        return meshopt_simplifySloppy<unsigned int>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
+    else
+    {
+        return meshopt_simplify<unsigned int>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
 }
 
 //static
@@ -91,41 +108,35 @@ U64 LLMeshOptimizer::simplify(U16 *destination,
                               U64 vertex_positions_stride,
                               U64 target_index_count,
                               F32 target_error,
+                              bool sloppy,
                               F32* result_error
     )
 {
-    return meshopt_simplify<unsigned short>(destination,
-                                 indices,
-                                 index_count,
-                                 (const float*)vertex_positions,
-                                 vertex_count,
-                                 vertex_positions_stride, 
-                                 target_index_count,
-                                 target_error,
-                                 result_error
-                                 );
+    if (sloppy)
+    {
+        return meshopt_simplifySloppy<unsigned short>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
+    else
+    {
+        return meshopt_simplify<unsigned short>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
 }
 
-//static
-U64 LLMeshOptimizer::simplifySloppy(U16 *destination,
-                              const U16 *indices,
-                              U64 index_count,
-                              const LLVector4a *vertex_positions,
-                              U64 vertex_count,
-    U64 vertex_positions_stride,
-                              U64 target_index_count,
-                              F32 target_error,
-                              F32* result_error
-    )
-{
-    return meshopt_simplifySloppy<unsigned short>(destination,
-                                 indices,
-                                 index_count,
-                                 (const float*)vertex_positions,
-                                 vertex_count,
-                                 vertex_positions_stride, 
-                                 target_index_count,
-                                 target_error,
-                                 result_error
-                                 );
-}
diff --git a/indra/llmeshoptimizer/llmeshoptimizer.h b/indra/llmeshoptimizer/llmeshoptimizer.h
index e881ec26c5..e8dd16dae9 100644
--- a/indra/llmeshoptimizer/llmeshoptimizer.h
+++ b/indra/llmeshoptimizer/llmeshoptimizer.h
@@ -45,6 +45,8 @@ public:
         U64 vertex_positions_stride);
 
     // returns amount of indices in destiantion
+    // sloppy engages a variant of a mechanizm that does not respect topology as much
+    // but is much more efective for simpler models
     // result_error returns how far from original the model is in % if not NULL
     // Works with U32 indices (LLFace uses U16 indices)
     static U64 simplifyU32(
@@ -56,10 +58,13 @@ public:
         U64 vertex_positions_stride,
         U64 target_index_count,
         F32 target_error,
+        bool sloppy,
         F32* result_error);
 
     // Returns amount of indices in destiantion
-    // Result_error returns how far from original the model is in % if not NULL
+    // sloppy engages a variant of a mechanizm that does not respect topology as much
+    // but is much better for simpler models
+    // result_error returns how far from original the model is in % if not NULL
     // Meant for U16 indices (LLFace uses U16 indices)
     static U64 simplify(
         U16 *destination,
@@ -70,19 +75,7 @@ public:
         U64 vertex_positions_stride,
         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 vertex_positions_stride,
-        U64 target_index_count,
-        F32 target_error,
+        bool sloppy,
         F32* result_error);
 private:
 };
-- 
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