246 lines
7 KiB
C++
246 lines
7 KiB
C++
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#include "Rayt.hpp"
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extern "C" {
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#include "lauxlib.h"
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#include "lualib.h"
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}
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#include "OBJ_Loader.h"
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bool loadMeshes(tp::Scene& scene, const tp::String& objetsPath) {
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using namespace tp;
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objl::Loader Loader;
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if (!Loader.LoadFile(objetsPath.read())) {
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std::cout << "Failed to Load File. May have failed to find it or it was not an .obj file.\n";
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return false;
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}
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for (auto& curMesh : Loader.LoadedMeshes) {
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scene.mObjects.append(Object());
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auto object = &scene.mObjects.last();
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for (auto& vertex : curMesh.Vertices) {
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// printf("{ %f, %f, %f }, \n", vertex.Position.X, vertex.Position.Y, vertex.Position.Z);
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object->mTopology.Points.append(Vec3F {vertex.Position.X, vertex.Position.Y, vertex.Position.Z});
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object->mTopology.Normals.append(Vec3F {vertex.Normal.X, vertex.Normal.Y, vertex.Normal.Z});
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}
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for (int j = 0; j < curMesh.Indices.size(); j += 3) {
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int idx1 = (int) curMesh.Indices[j];
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int idx2 = (int) curMesh.Indices[j + 1];
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int idx3 = (int) curMesh.Indices[j + 2];
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// printf("{ %i, %i, %i },\n", idx1, idx2, idx3);
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object->mTopology.Indexes.append(Vec3I {idx1, idx2, idx3});
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}
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if (object->mTopology.Normals.size() != object->mTopology.Points.size()) {
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printf("Logic error loading normals\n");
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}
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object->mCache.Source = &object->mTopology;
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object->mCache.updateCache();
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}
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return scene.mObjects.size();
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}
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// Function to read a Lua table representing RenderSettings
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int readRenderSettings(lua_State* L, tp::RayTracer::RenderSettings& settings) {
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lua_getglobal(L, "RenderSettings");
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if (!lua_istable(L, -1)) {
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printf("RenderSettings is not a table.\n");
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return 0; // Error
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}
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// Read depth field
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lua_getfield(L, -1, "depth");
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if (lua_isnumber(L, -1)) {
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settings.depth = (int) lua_tonumber(L, -1);
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} else {
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printf("RenderSettings 'depth' field is missing or not a number.\n");
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lua_pop(L, 1); // Pop the 'depth' field
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return 0; // Error
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}
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lua_pop(L, 1); // Pop the 'depth' field
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// Read spray field
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lua_getfield(L, -1, "spray");
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if (lua_isnumber(L, -1)) {
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settings.spray = (int) lua_tonumber(L, -1);
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} else {
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printf("RenderSettings 'spray' field is missing or not a number.\n");
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lua_pop(L, 1); // Pop the 'spray' field
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return 0; // Error
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}
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lua_pop(L, 1); // Pop the 'spray' field
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// Read depth field
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lua_getfield(L, -1, "multisampling");
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if (lua_isnumber(L, -1)) {
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settings.multisampling = (int) lua_tonumber(L, -1);
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} else {
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printf("RenderSettings 'depth' field is missing or not a number.\n");
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lua_pop(L, 1); // Pop the 'depth' field
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return 0; // Error
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}
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lua_pop(L, 1); // Pop the 'depth' field
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return 1; // Success
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}
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// Function to read a Lua table representing a light
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int readLight(lua_State* L, tp::PointLight* light) {
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lua_getfield(L, -1, "pos"); // Get the "pos" field from the light table
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if (!lua_istable(L, -1)) {
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printf("Light is missing the 'pos' table.\n");
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return 0; // Error
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}
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for (int i = 0; i < 3; i++) {
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lua_rawgeti(L, -1, i + 1); // Index is 1-based in Lua
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if (!lua_isnumber(L, -1)) {
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printf("Light 'pos' field is not a number at index %d.\n", i);
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lua_pop(L, 2); // Pop both the number and the 'pos' table
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return 0; // Error
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}
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light->pos[i] = lua_tonumber(L, -1);
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lua_pop(L, 1); // Pop the number
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}
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lua_pop(L, 1); // Pop the 'pos' table
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lua_getfield(L, -1, "intensity"); // Get the "intensity" field from the light table
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if (!lua_isnumber(L, -1)) {
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printf("Light is missing the 'intensity' field or it's not a number.\n");
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lua_pop(L, 1); // Pop the 'intensity' field
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return 0; // Error
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}
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light->intensity = lua_tonumber(L, -1);
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lua_pop(L, 1); // Pop the 'intensity' field
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return 1; // Success
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}
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void loadScene(tp::Scene& scene, const tp::String& scenePath, tp::RayTracer::RenderSettings& settings) {
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lua_State* L = luaL_newstate();
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luaL_openlibs(L);
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if (luaL_dofile(L, "script.lua") != 0) {
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lua_close(L);
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printf("Cant open scene script.\n");
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return;
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}
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lua_getglobal(L, "Meshes");
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if (lua_isstring(L, -1)) {
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tp::String meshesPath = lua_tostring(L, -1);
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if (!loadMeshes(scene, meshesPath)) {
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printf("No 'meshes' loaded - check ur .obj path and validate content of .obj .\n");
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return;
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}
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} else {
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printf("No 'meshes' path given.\n");
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return;
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}
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// --- camera
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// Access Camera table
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lua_getglobal(L, "Camera");
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if (!lua_istable(L, -1)) {
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printf("Camera is not a table.\n");
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lua_close(L);
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return;
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}
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// Verify you are inside the "Camera" table
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int cameraTableIndex = lua_gettop(L); // Get the index of the "Camera" table
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// Access the "pos" field and validate it
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lua_getfield(L, cameraTableIndex, "pos");
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if (!lua_istable(L, -1) || lua_rawlen(L, -1) != 3) {
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printf("Invalid 'pos' field in Camera table.\n");
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lua_close(L);
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return;
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}
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// Read the values from the table
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float pos[3];
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for (int i = 0; i < 3; i++) {
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lua_rawgeti(L, -1, i + 1);
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if (lua_isnumber(L, -1)) {
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pos[i] = lua_tonumber(L, -1);
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} else {
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printf("Invalid 'pos' field value at index %d.\n", i + 1);
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lua_close(L);
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return;
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}
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lua_pop(L, 1);
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}
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// Access the "size_x" field and validate it
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lua_getfield(L, cameraTableIndex, "size_x");
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if (!lua_isnumber(L, -1)) {
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printf("Invalid or missing 'size_x' field in Camera table.\n");
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lua_close(L);
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return;
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}
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int size_x = lua_tointeger(L, -1);
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lua_pop(L, 1); // Pop the 'size_x' value from the stack
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// Access the "size_y" field and validate it
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lua_getfield(L, cameraTableIndex, "size_y");
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if (!lua_isnumber(L, -1)) {
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printf("Invalid or missing 'size_y' field in Camera table.\n");
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lua_close(L);
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return;
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}
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int size_y = lua_tointeger(L, -1);
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settings.size = {(tp::halnf) size_x, (tp::halnf) size_y};
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scene.mCamera.lookAtPoint({0, 0, 0}, {pos[0], pos[1], pos[2]}, {0, 0, 1});
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scene.mCamera.setFOV(3.14 / 4);
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scene.mCamera.setFar(100);
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scene.mCamera.setRatio((tp::halnf) size_y / (tp::halnf) size_x);
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// ---------- LIGHTS
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{
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lua_getglobal(L, "Lights");
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if (!lua_istable(L, -1)) {
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printf("Lights is not a table.\n");
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lua_close(L);
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return; // Error
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}
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// Read and process each light in the "Lights" table
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int numLights = lua_rawlen(L, -1); // Get the number of lights in the table
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for (int i = 1; i <= numLights; i++) {
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lua_rawgeti(L, -1, i); // Get the i-th element (light) from the table
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if (lua_istable(L, -1)) {
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tp::PointLight light;
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if (!readLight(L, &light)) {
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printf("Cant read lights data\n");
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lua_close(L);
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return; // Error
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}
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scene.mLights.append(light);
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}
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lua_pop(L, 1); // Pop the i-th light table
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}
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}
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// ----------- settings --------------
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if (!readRenderSettings(L, settings)) {
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printf("Cant Read Render Settings");
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lua_close(L);
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return; // Error
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}
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lua_close(L);
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}
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