Merge glTF scene rendering sample (#744)

* Started reworking the scene rendering to sample
Use glTF instead of ASSIMP, per-material pipelines, material loading, etc.

* Visibility toggle for scene nodes

* Fixed lighting, updated GLSL and HLSL shaders

* Renamed sample

* Code-Cleanup, comments, validation fixes

* Android build

* Started on tutorial for glTF scene rendering sample

* Minor code cleanup

* Adding new chapters to the tutorial for glTF scene rendering sample

* Added info on normal map shader bindings, spelling

* Added drawing chapter

* Getter for texture descriptors

Makes code a easier to read

* Renamed glTF scene sample

* Add markdown files to projects

* Updated readme, separate chapter for glTF samples

* Comments

* Removed unused screenshot

android/examples/gltfloading/CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.4.1 FATAL_ERROR)
 
-set(NAME gltfscene)
+set(NAME gltfloading)
 
 set(SRC_DIR ../../../examples/${NAME})
 set(BASE_DIR ../../../base)

android/examples/gltfloading/build.gradle

@@ -49,8 +49,8 @@ task copyTask {
     }
 
     copy {
-       from '../../../data/shaders/glsl/gltfscene'
-       into 'assets/shaders/glsl/gltfscene'
+       from '../../../data/shaders/glsl/gltfloading'
+       into 'assets/shaders/glsl/gltfloading'
        include '*.*'
     }
 

android/examples/gltfscenerendering/CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.4.1 FATAL_ERROR)
 
-set(NAME scenerendering)
+set(NAME gltfscenerendering)
 
 set(SRC_DIR ../../../examples/${NAME})
 set(BASE_DIR ../../../base)
@@ -23,7 +23,7 @@ include_directories(${EXTERNAL_DIR})
 include_directories(${EXTERNAL_DIR}/glm)
 include_directories(${EXTERNAL_DIR}/gli)
 include_directories(${EXTERNAL_DIR}/imgui)
-include_directories(${EXTERNAL_DIR}/assimp)
+include_directories(${EXTERNAL_DIR}/tinygltf)
 include_directories(${ANDROID_NDK}/sources/android/native_app_glue)
 
 target_link_libraries(

android/examples/gltfscenerendering/build.gradle

@@ -49,14 +49,14 @@ task copyTask {
     }
 
     copy {
-       from '../../../data/shaders/glsl/scenerendering'
-       into 'assets/shaders/glsl/scenerendering'
+       from '../../../data/shaders/glsl/gltfscenerendering'
+       into 'assets/shaders/glsl/gltfscenerendering'
        include '*.*'
     }
 
     copy {
-       from '../../../data/models/sibenik'
-       into 'assets/models/sibenik'
+       from '../../../data/models/sponza'
+       into 'assets/models/sponza'
        include '*.*'
     }