#1126 gltf scene import prototype (#1172)

* #1126 GLTF Scene import initial prototype (working geometry import for some assets)

* #1126 WIP -- Expand support for more vertex formats, PoC material import, shadow support, scale support

* #1126 move GLTF implementation to newview/gltf

* #1126 Refactor attribute loading to be less copy/pasta for each combination of types

* #1126 Partially working object selection.  Ability to have multiple scenes at once.  Helpful message on how to use the preview button.

* #1126 Add bounding box debug display and untangle GLTF raycast from LLVOVolume raycast

* #1126 Working raycast on GLTF scenes.

* #1126 Remove some #pragma optimize offs

1 files changed, 17 insertions, 10 deletions

diff --git a/indra/newview/lltinygltfhelper.cpp b/indra/newview/lltinygltfhelper.cpp
index 5b75db37d0..40e6f285a8 100644
--- a/indra/newview/lltinygltfhelper.cpp
+++ b/indra/newview/lltinygltfhelper.cpp
@@ -147,7 +147,7 @@ const tinygltf::Image * LLTinyGLTFHelper::getImageFromTextureIndex(const tinyglt
     return nullptr;
 }
 
-LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tinygltf::Model & model, S32 texture_index, std::string & name)
+LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tinygltf::Model & model, S32 texture_index, std::string & name, bool flip)
 {
     const tinygltf::Image* image = getImageFromTextureIndex(model, texture_index);
     LLImageRaw* rawImage = nullptr;
@@ -159,14 +159,17 @@ LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tiny
     {
         name = image->name;
         rawImage = new LLImageRaw(&image->image[0], image->width, image->height, image->component);
-        rawImage->verticalFlip();
+        if (flip)
+        {
+            rawImage->verticalFlip();
+        }
         rawImage->optimizeAwayAlpha();
     }
 
     return rawImage;
 }
 
-LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tinygltf::Model & model, S32 texture_index)
+LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tinygltf::Model & model, S32 texture_index, bool flip)
 {
     const tinygltf::Image* image = getImageFromTextureIndex(model, texture_index);
     LLImageRaw* rawImage = nullptr;
@@ -177,7 +180,10 @@ LLImageRaw * LLTinyGLTFHelper::getTexture(const std::string & folder, const tiny
         image->component <= 4)
     {
         rawImage = new LLImageRaw(&image->image[0], image->width, image->height, image->component);
-        rawImage->verticalFlip();
+        if (flip)
+        {
+            rawImage->verticalFlip();
+        }
         rawImage->optimizeAwayAlpha();
     }
 
@@ -237,7 +243,8 @@ bool LLTinyGLTFHelper::getMaterialFromModel(
     const tinygltf::Model& model_in,
     S32 mat_index,
     LLFetchedGLTFMaterial* material,
-    std::string& material_name)
+    std::string& material_name,
+    bool flip)
 {
     llassert(material);
 
@@ -256,18 +263,18 @@ bool LLTinyGLTFHelper::getMaterialFromModel(
     material_name = material_in.name;
 
     // get base color texture
-    LLPointer<LLImageRaw> base_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.pbrMetallicRoughness.baseColorTexture.index);
+    LLPointer<LLImageRaw> base_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.pbrMetallicRoughness.baseColorTexture.index, flip);
     // get normal map
-    LLPointer<LLImageRaw> normal_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.normalTexture.index);
+    LLPointer<LLImageRaw> normal_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.normalTexture.index, flip);
     // get metallic-roughness texture
-    LLPointer<LLImageRaw> mr_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.pbrMetallicRoughness.metallicRoughnessTexture.index);
+    LLPointer<LLImageRaw> mr_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.pbrMetallicRoughness.metallicRoughnessTexture.index, flip);
     // get emissive texture
-    LLPointer<LLImageRaw> emissive_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.emissiveTexture.index);
+    LLPointer<LLImageRaw> emissive_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.emissiveTexture.index, flip);
     // get occlusion map if needed
     LLPointer<LLImageRaw> occlusion_img;
     if (material_in.occlusionTexture.index != material_in.pbrMetallicRoughness.metallicRoughnessTexture.index)
     {
-        occlusion_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.occlusionTexture.index);
+        occlusion_img = LLTinyGLTFHelper::getTexture(folder, model_in, material_in.occlusionTexture.index, flip);
     }
 
     LLPointer<LLViewerFetchedTexture> base_color_tex;