Adding lua scene description

Externals/CMakeLists.txt

@@ -26,3 +26,23 @@ set(${PROJECT_NAME}_SOURCES
 
 add_library(${PROJECT_NAME} STATIC ${${PROJECT_NAME}_SOURCES})
 target_include_directories(${PROJECT_NAME} PUBLIC ./nanovg/src/ ./nanovg/obsolete/)
+
+project(Lua)
+
+# Add the Lua source files
+#file(GLOB ${PROJECT_NAME}_SOURCES "./lua/luaone.c")
+# list(FILTER ${PROJECT_NAME}_SOURCES EXCLUDE REGEX "./lua/lua.c$")
+
+# Create the Lua library
+add_library(${PROJECT_NAME} STATIC "lua/onelua.c")
+
+target_compile_definitions(${PROJECT_NAME} PUBLIC MAKE_LIB)
+
+# Include directories for Lua headers
+target_include_directories(${PROJECT_NAME} PUBLIC "./lua")
+
+# Set compilation options, e.g., for compilation with C99
+set_target_properties(${PROJECT_NAME} PROPERTIES
+        C_STANDARD 99
+        C_STANDARD_REQUIRED ON
+)

Externals/lua

@@ -0,0 +1 @@
+Subproject commit 6baee9ef9d5657ab582c8a4b9f885ec58ed502d0

RayTracer/CMakeLists.txt

@@ -15,9 +15,10 @@ target_include_directories(${PROJECT_NAME} PUBLIC ./public/)
 target_link_libraries(${PROJECT_NAME} PUBLIC Math CommandLine Connection)
 
 ### -------------------------- Applications  --------------------------  ###
-add_executable(rayt ./applications/Rayt.cpp )
+add_executable(rayt ./applications/Rayt.cpp applications/SceneLoad.cpp
+        applications/Rayt.hpp)
 
-target_link_libraries(rayt ${PROJECT_NAME})
+target_link_libraries(rayt ${PROJECT_NAME} Lua)
 
 ### -------------------------- Tests  --------------------------  ###
 enable_testing()

RayTracer/applications/Rayt.cpp

@@ -1,47 +1,16 @@
 
 // #include "NewPlacement.hpp"
 
-#include "Buffer.hpp"
-#include "CommandLine.hpp"
-#include "RayTracer.hpp"
-#include "Strings.hpp"
-#include "Timing.hpp"
-#include "Vec.hpp"
+#include "Rayt.hpp"
 
-#include "OBJ_Loader.h"
+#include "CommandLine.hpp"
+#include "Timing.hpp"
 
 #define STB_IMAGE_WRITE_IMPLEMENTATION
 #include "stb_image_write.h"
 
 using namespace tp;
 
-void loadScene(Scene& scene, const String& scenePath) {
-  objl::Loader Loader;
-
-  if (!Loader.LoadFile(scenePath.read())) {
-    std::cout << "Failed to Load File. May have failed to find it or it was not an .obj file.\n";
-    return;
-  }
-
-  for (auto& curMesh : Loader.LoadedMeshes) {
-    scene.mObjects.append(Topology());
-    auto object = &scene.mObjects.last();
-
-    for (int j = 0; j < curMesh.Indices.size(); j += 3) {
-      unsigned int idx1 = curMesh.Indices[j];
-      unsigned int idx2 = curMesh.Indices[j + 1];
-      unsigned int idx3 = curMesh.Indices[j + 2];
-
-      Vec3F v1 = {curMesh.Vertices[idx1].Position.X, curMesh.Vertices[idx1].Position.Y, curMesh.Vertices[idx1].Position.Z};
-      Vec3F v2 = {curMesh.Vertices[idx2].Position.X, curMesh.Vertices[idx2].Position.Y, curMesh.Vertices[idx2].Position.Z};
-      Vec3F v3 = {curMesh.Vertices[idx3].Position.X, curMesh.Vertices[idx3].Position.Y, curMesh.Vertices[idx3].Position.Z};
-
-      object->addTrig(v1, v2, v3);
-    }
-    object->updateTransformed();
-  }
-}
-
 void writeImage(const RayTracer::RenderBuffer& output) {
   // Save the data to a PNG file
   struct urgb {
@@ -62,24 +31,21 @@ void writeImage(const RayTracer::RenderBuffer& output) {
 
   if (stbi_write_png("output.png", converted.size().x, converted.size().y, 4, converted.getBuff(), converted.size().x * 4) != 0) {
     // Image saved successfully
-    std::cout << "Image saved successfully." << std::endl;
+    printf("Image saved successfully.\n");
   } else {
-    std::cerr << "Error saving the image." << std::endl;
+    printf("Error saving the image.\n");
   }
 }
 
-void renderCommand(const String& scenePath, RayTracer::RenderBuffer::Index2D size) {
+void renderCommand(const String& scenePath) {
   Scene scene;
 
-  loadScene(scene, scenePath);
+  RayTracer::RenderSettings settings;
 
-  scene.mCamera.lookAtPoint({0, 0, 0}, {-3, -3, 3}, {1, 1, 1});
-  scene.mCamera.setFOV(3.14 / 4);
-  scene.mCamera.setFar(100);
-  scene.mCamera.setRatio((halnf) size.y / (halnf) size.x);
+  loadScene(scene, scenePath, settings);
 
   RayTracer::RenderBuffer output;
-  output.reserve(size);
+  output.reserve(RayTracer::RenderBuffer::Index2D(settings.size.x, settings.size.y));
 
   RayTracer rayt;
 
@@ -99,7 +65,7 @@ int main(int argc, const char** argv) {
   tp::ModuleManifest module("Rayt", nullptr, nullptr, deps);
 
   if (module.initialize()) {
-    renderCommand("scene.obj", {600, 600});
+    renderCommand("scene.lua");
 
     module.deinitialize();
   }

RayTracer/applications/Rayt.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+#include "RayTracer.hpp"
+#include "Strings.hpp"
+
+void loadScene(tp::Scene& scene, const tp::String& scenePath, tp::RayTracer::RenderSettings& settings);

RayTracer/applications/SceneLoad.cpp

@@ -0,0 +1,151 @@
+
+#include "Rayt.hpp"
+
+extern "C" {
+#include "lauxlib.h"
+#include "lualib.h"
+}
+
+#include "OBJ_Loader.h"
+
+bool loadMeshes(tp::Scene& scene, const tp::String& objetsPath) {
+  using namespace tp;
+
+  objl::Loader Loader;
+
+  if (!Loader.LoadFile(objetsPath.read())) {
+    std::cout << "Failed to Load File. May have failed to find it or it was not an .obj file.\n";
+    return false;
+  }
+
+  for (auto& curMesh : Loader.LoadedMeshes) {
+    scene.mObjects.append(Topology());
+    auto object = &scene.mObjects.last();
+
+    for (int j = 0; j < curMesh.Indices.size(); j += 3) {
+      unsigned int idx1 = curMesh.Indices[j];
+      unsigned int idx2 = curMesh.Indices[j + 1];
+      unsigned int idx3 = curMesh.Indices[j + 2];
+
+      Vec3F v1 = {curMesh.Vertices[idx1].Position.X, curMesh.Vertices[idx1].Position.Y, curMesh.Vertices[idx1].Position.Z};
+      Vec3F v2 = {curMesh.Vertices[idx2].Position.X, curMesh.Vertices[idx2].Position.Y, curMesh.Vertices[idx2].Position.Z};
+      Vec3F v3 = {curMesh.Vertices[idx3].Position.X, curMesh.Vertices[idx3].Position.Y, curMesh.Vertices[idx3].Position.Z};
+
+      object->addTrig(v1, v2, v3);
+    }
+    object->updateTransformed();
+  }
+
+  return scene.mObjects.size();
+}
+
+bool getVector(lua_State* L, const char* name, tp::Vec3F& out, const char* parent) {
+  lua_getglobal(L, name);
+
+  if (lua_istable(L, -1)) {
+    lua_pushstring(L, "x");
+    lua_gettable(L, -2);
+
+    if (lua_isnumber(L, -1)) {
+      out.x = lua_tonumber(L, -1);
+    } else {
+      printf("Component of vector '%s' is not found in %s\n\n", name, parent);
+      return false;
+    }
+
+    lua_pop(L, 1);
+
+  } else {
+    printf("Vector '%s' is not found in %s\n\n", name, parent);
+    return false;
+  }
+}
+
+void loadScene(tp::Scene& scene, const tp::String& scenePath, tp::RayTracer::RenderSettings& settings) {
+  lua_State* L = luaL_newstate();
+  luaL_openlibs(L);
+
+  if (luaL_dofile(L, "script.lua") != 0) {
+    lua_close(L);
+    printf("Cant open scene script.\n");
+    return;
+  }
+
+  lua_getglobal(L, "Meshes");
+
+  if (lua_isstring(L, -1)) {
+    tp::String meshesPath = lua_tostring(L, -1);
+
+    if (!loadMeshes(scene, meshesPath)) {
+      printf("No 'meshes' loaded - check ur .obj path and validate content of .obj .\n");
+      return;
+    }
+
+  } else {
+    printf("No 'meshes' path given.\n");
+    return;
+  }
+
+  // --- camera
+
+  // Access Camera table
+  lua_getglobal(L, "Camera");
+  if (!lua_istable(L, -1)) {
+    printf("Camera is not a table.\n");
+    lua_close(L);
+    return;
+  }
+
+  // Verify you are inside the "Camera" table
+  int cameraTableIndex = lua_gettop(L); // Get the index of the "Camera" table
+
+  // Access the "pos" field and validate it
+  lua_getfield(L, cameraTableIndex, "pos");
+  if (!lua_istable(L, -1) || lua_rawlen(L, -1) != 3) {
+    printf("Invalid 'pos' field in Camera table.\n");
+    lua_close(L);
+    return;
+  }
+
+  // Read the values from the table
+  float pos[3];
+  for (int i = 0; i < 3; i++) {
+    lua_rawgeti(L, -1, i + 1);
+    if (lua_isnumber(L, -1)) {
+      pos[i] = lua_tonumber(L, -1);
+    } else {
+      printf("Invalid 'pos' field value at index %d.\n", i + 1);
+      lua_close(L);
+      return;
+    }
+    lua_pop(L, 1);
+  }
+
+  // Access the "size_x" field and validate it
+  lua_getfield(L, cameraTableIndex, "size_x");
+  if (!lua_isnumber(L, -1)) {
+    printf("Invalid or missing 'size_x' field in Camera table.\n");
+    lua_close(L);
+    return;
+  }
+  int size_x = lua_tointeger(L, -1);
+  lua_pop(L, 1); // Pop the 'size_x' value from the stack
+
+  // Access the "size_y" field and validate it
+  lua_getfield(L, cameraTableIndex, "size_y");
+  if (!lua_isnumber(L, -1)) {
+    printf("Invalid or missing 'size_y' field in Camera table.\n");
+    lua_close(L);
+    return;
+  }
+  int size_y = lua_tointeger(L, -1);
+
+  settings.size = {(tp::halnf) size_x, (tp::halnf) size_y};
+
+  scene.mCamera.lookAtPoint({0, 0, 0}, {pos[0], pos[1], pos[2]}, {0, 0, 1});
+  scene.mCamera.setFOV(3.14 / 4);
+  scene.mCamera.setFar(100);
+  scene.mCamera.setRatio((tp::halnf) size_x / (tp::halnf) size_y);
+
+  lua_close(L);
+}

RayTracer/public/RayTracer.hpp

@@ -31,6 +31,7 @@ namespace tp {
     struct RenderSettings {
       alni samplesiPerPixel = 1;
       alni rayBounces = 1;
+      Vec2I size;
     };
 
   public: