refactor sdlrender example a bit(still w.i.p.)

examples/sdlviewer/README.md

@@ -3,6 +3,10 @@
 This viewer uses NanoRT(SW ray tracer) to render the model and display it using SDL2
 (So no OpenGL dependency)
 
+## Status 
+
+W.I.P.
+
 ## Requirements 
 
 * C++14 compiler

examples/sdlviewer/main.cc

@@ -15,6 +15,12 @@
 #include <emscripten/html5.h>
 #endif
 
+// To avoid some C define symbol conflict with SDL(e.g. 'Bool')
+// tinyusdz headers muet be included before SDL
+#include "tinyusdz.hh"
+#include "tydra/render-data.hh"
+
+
 // ../common/SDL2
 #include <SDL.h>
 
@@ -33,12 +39,11 @@
 #include "imnodes.h"
 #include "roboto_mono_embed.inc.h"
 #include "virtualGizmo3D/vGizmo.h"
+#include "trackball.h"
 
 //
 #include "gui.hh"
 #include "simple-render.hh"
-#include "tinyusdz.hh"
-#include "trackball.h"
 
 #if defined(USDVIEW_USE_NATIVEFILEDIALOG)
 #include "nfd.h"
@@ -89,7 +94,7 @@ struct GUIContext {
   // std::array<float, 3> lookat = {0.0f, 0.0f, 0.0f};
   // std::array<float, 3> up = {0.0f, 1.0f, 0.0f};
 
-  example::RenderScene render_scene;
+  example::RTRenderScene rt_render_scene;
 
   example::Camera camera;
 
@@ -296,47 +301,21 @@ bool LoadModel(const std::string& filename, tinyusdz::Stage* stage) {
   std::string warn;
   std::string err;
 
-  if (ext.compare("usdz") == 0) {
-    std::cout << "usdz\n";
-    bool ret = tinyusdz::LoadUSDZFromFile(filename, stage, &warn, &err);
-    if (!warn.empty()) {
-      std::cerr << "WARN : " << warn << "\n";
-    }
+  if (!tinyusdz::IsUSD(filename)) {
+    std::cerr << "ERR: file not found or file is not USD format : " << filename << "\n";
+    return false;
+  }
+
+  bool ret = tinyusdz::LoadUSDFromFile(filename, stage, &warn, &err);
+  if (warn.size()) {
+     std::cerr << "WARN : " << warn << "\n";
+  }
+
+  if (!ret) {
     if (!err.empty()) {
       std::cerr << "ERR : " << err << "\n";
     }
-
-    if (!ret) {
-      std::cerr << "Failed to load USDZ file: " << filename << "\n";
-      return false;
-    }
-  } else if (ext.compare("usda") == 0) {
-    std::cout << "usda\n";
-    bool ret = tinyusdz::LoadUSDAFromFile(filename, stage, &warn, &err);
-    if (!warn.empty()) {
-      std::cerr << "WARN : " << warn << "\n";
-    }
-    if (!err.empty()) {
-      std::cerr << "ERR : " << err << "\n";
-    }
-
-    if (!ret) {
-      std::cerr << "Failed to load USDA file: " << filename << "\n";
-      return false;
-    }
-  } else {  // assume usdc
-    bool ret = tinyusdz::LoadUSDCFromFile(filename, stage, &warn, &err);
-    if (!warn.empty()) {
-      std::cerr << "WARN : " << warn << "\n";
-    }
-    if (!err.empty()) {
-      std::cerr << "ERR : " << err << "\n";
-    }
-
-    if (!ret) {
-      std::cerr << "Failed to load USDC file: " << filename << "\n";
-      return false;
-    }
+    return false;
   }
 
   return true;
@@ -387,7 +366,7 @@ void RenderThread(GUIContext* ctx) {
       continue;
     }
 
-    example::Render(ctx->render_scene, ctx->camera, &ctx->aov);
+    example::Render(ctx->rt_render_scene, ctx->camera, &ctx->aov);
 
     ctx->update_texture = true;
 
@@ -842,7 +821,7 @@ int main(int argc, char** argv) {
     //}
 
     // Setup render mesh
-    if (!gui_ctx.render_scene.Setup()) {
+    if (!gui_ctx.rt_render_scene.Setup()) {
       std::cerr << "Failed to setup render mesh.\n";
       exit(-1);
     }

examples/sdlviewer/simple-render.cc

@@ -489,7 +489,7 @@ void BuildCameraFrame(float3* origin, float3* corner, float3* u, float3* v,
   }
 }
 
-bool Render(const RenderScene& scene, const Camera& cam, AOV* output) {
+bool Render(const RTRenderScene& scene, const Camera& cam, AOV* output) {
   int width = output->width;
   int height = output->height;
 
@@ -680,7 +680,7 @@ bool Render(const RenderScene& scene, const Camera& cam, AOV* output) {
   return true;
 }
 
-bool RenderLines(int start_y, int end_y, const RenderScene& scene,
+bool RenderLines(int start_y, int end_y, const RTRenderScene& scene,
                  const Camera& cam, AOV* output) {
   int width = output->width;
   int height = output->height;
@@ -835,7 +835,7 @@ bool RenderLines(int start_y, int end_y, const RenderScene& scene,
   return true;
 }
 
-bool RenderScene::Setup() {
+bool RTRenderScene::Setup() {
   //
   // Construct scene
   //

examples/sdlviewer/simple-render.hh

@@ -4,7 +4,9 @@
 
 #include "nanort.h"
 #include "nanosg.h"
+//
 #include "tinyusdz.hh"
+#include "tydra/render-data.hh"
 
 namespace example {
 
@@ -201,7 +203,7 @@ struct Image {
   int32_t channels{-1};  // e.g. 3 for RGB.
 };
 
-class RenderScene {
+class RTRenderScene {
  public:
   std::vector<DrawGeomMesh> draw_meshes;
   std::vector<Material> materials;
@@ -215,11 +217,11 @@ class RenderScene {
   bool Setup();
 };
 
-bool Render(const RenderScene &scene, const Camera &cam, AOV *output);
+bool Render(const RTRenderScene &scene, const Camera &cam, AOV *output);
 
 // Render images for lines [start_y, end_y]
 // single-threaded. for webassembly.
-bool RenderLines(int start_y, int end_y, const RenderScene &scene,
+bool RenderLines(int start_y, int end_y, const RTRenderScene &scene,
                  const Camera &cam, AOV *output);
 
 }  // namespace example