reduce engine.json.in && add save OBJ button

engine/engine.json.in

@@ -1,9 +1,7 @@
 {
-    "scene_type": "distance_barrier_rb_problem",
     "timestep": 0.01,
     "max_time": 10.0,
     "rigid_body_problem": {
-        "coefficient_restitution": -1,
         "gravity": [0, 9.8, 0],
         "rigid_bodies": [{
             "mesh": "@LOCAL_DIR_PATH@/stl/crank.stl",

sim-test/rigid-test/cube/config.json

@@ -0,0 +1,19 @@
+{
+    "material": [1e5, 0.3, 1e3],
+    "mshFilePath": "/home/cflin/Documents/CppField/source/RigidElasticSim/sim-test/rigid-test/cube/cube_9743.msh",
+
+    "DBC": [
+        {
+            "min": [-0.001, -0.001, -0.001],
+            "max": [1.001, 0.001, 1.001]
+        }
+    ],
+
+    "NBC": [
+        {
+            "min": [-0.001, 0.999, -0.001],
+            "max": [1.001, 1.001, 1.001],
+            "force": [-10, 0, 0]
+        }
+    ]
+}

sim-test/rigid-test/rearAxle-mod/config.json

@@ -0,0 +1,24 @@
+{
+    "material": [1e5, 0.3, 1e3],
+    "mshFilePath": "/home/cflin/Documents/CppField/source/RigidElasticSim/sim-test/rigid-test/rearAxle-mod/rearAxle-mod_.msh",
+
+    "DBC": [
+        {
+            "min": [-0.1, 0.4, -0.1],
+            "max": [0.6, 0.6, 1.1]
+        }
+    ],
+
+    "NBC": [
+        {
+            "min": [-0.1, 0.8, -0.1],
+            "max": [1.1, 1.1, 1.1],
+            "force": [1, 0, 0]
+        },
+        {
+            "min": [-0.1, -0.1, -0.1],
+            "max": [1.1, 0.2, 1.1],
+            "force": [1, 0, 0]
+        }
+    ]
+}

sim-test/rigid-test/rocker-arm/config.json

@@ -0,0 +1,19 @@
+{
+    "material": [1e5, 0.3, 1e3],
+    "mshFilePath": "/home/cflin/Documents/CppField/source/RigidElasticSim/sim-test/rigid-test/rocker-arm/rocker-arm_.msh",
+
+    "DBC": [
+        {
+            "min": [-0.001, 0.8, 0.8],
+            "max": [1.001, 1.1, 1.1]
+        }
+    ],
+
+    "NBC": [
+        {
+            "min": [-0.001, 0.25, -0.001],
+            "max": [1.001, 0.4, 0.1],
+            "force": [0, -10, 0]
+        }
+    ]
+}

src/SimState.cpp

@@ -455,7 +455,6 @@ bool SimState::save_obj_sequence(const std::string& dir_name)
 {
     // Create the output directory if it does not exist
     fs::path dir_path(dir_name);
-    fs::create_directories(dir_path);
 
     bool success = true;
     for (int i = 0; i < state_sequence.size(); i++) {

src/viewer/UIMenu.cpp

@@ -7,7 +7,7 @@
 #include <viewer/imgui_ext.hpp>
 
 #include <logger.hpp>
-
+#include "Util.h"
 namespace ipc::rigid {
 
     void UISimState::draw_menu() {
@@ -99,12 +99,7 @@ namespace ipc::rigid {
 
 
 
-            // if (ImGui::Button("Save OBJ sequence", ImVec2(-1, 0))) {
-            //     std::string dir_name = igl::file_dialog_save();
-            //     if (dir_name != "") {
-            //         save_obj_sequence(dir_name);
-            //     }
-            // }
+
 
             // if (ImGui::Button("Save gltf", ImVec2(-1, 0))) {
             //     std::string filename = igl::file_dialog_save();
@@ -200,6 +195,12 @@ namespace ipc::rigid {
             std::string fname = igl::file_dialog_save();
             save(fname);
         }
+        if (ImGui::Button("导出 OBJ 文件", ImVec2(-1, 0))) {
+            std::string dir_name = ssim::directory_dialog_save();
+            if (dir_name != "") {
+                save_obj_sequence(dir_name);
+            }
+        }
         ImGui::EndChild();
 
     }

src/viewer/Util.h

@@ -0,0 +1,116 @@
+//
+// Created by cflin on 4/14/23.
+//
+
+#ifndef EXAMPLE_UTIL_H
+#define EXAMPLE_UTIL_H
+#include <string>
+#include <cstdio>
+#include <cstring>
+
+#ifdef _WIN32
+#include <windows.h>
+ #include <Commdlg.h>
+#endif
+namespace ssim {
+
+    inline std::string directory_dialog_save(){
+        const int FILE_DIALOG_MAX_BUFFER = 1024;
+        char buffer[FILE_DIALOG_MAX_BUFFER];
+        buffer[0] = '\0';
+        buffer[FILE_DIALOG_MAX_BUFFER - 1] = 'x'; // Initialize last character with a char != '\0'
+
+#ifdef __APPLE__
+        // For apple use applescript hack
+  // There is currently a bug in Applescript that strips extensions off
+  // of chosen existing files in the "choose file name" dialog
+  // I'm assuming that will be fixed soon
+  FILE * output = popen(
+    "osascript -e \""
+    "   tell application \\\"System Events\\\"\n"
+    "           activate\n"
+    "           set existing_file to choose file name\n"
+    "   end tell\n"
+    "   set existing_file_path to (POSIX path of (existing_file))\n"
+    "\" 2>/dev/null | tr -d '\n' ","r");
+  if (output)
+  {
+    auto ret = fgets(buffer, FILE_DIALOG_MAX_BUFFER, output);
+    if (ret == NULL || ferror(output))
+    {
+      // I/O error
+      buffer[0] = '\0';
+    }
+    if (buffer[FILE_DIALOG_MAX_BUFFER - 1] == '\0')
+    {
+      // File name too long, buffer has been filled, so we return empty string instead
+      buffer[0] = '\0';
+    }
+  }
+#elif defined _WIN32
+
+        // Use native windows file dialog box
+  // (code contributed by Tino Weinkauf)
+
+  OPENFILENAME ofn;       // common dialog box structure
+  char szFile[260];       // buffer for file name
+
+  // Initialize OPENFILENAME
+  ZeroMemory(&ofn, sizeof(ofn));
+  ofn.lStructSize = sizeof(ofn);
+  ofn.hwndOwner = NULL;//hwnd;
+  ofn.lpstrFile = szDir;
+  // Set lpstrFile[0] to '\0' so that GetOpenFileName does not
+  // use the contents of szFile to initialize itself.
+  ofn.lpstrFile[0] = '\0';
+  ofn.nMaxFile = sizeof(szDir);
+  ofn.lpstrFilter = "";
+  ofn.nFilterIndex = 1;
+  ofn.lpstrFileTitle = NULL;
+  ofn.nMaxFileTitle = 0;
+  ofn.lpstrInitialDir = NULL;
+  ofn.Flags = OFN_PATHMUSTEXIST;
+
+  // Display the Open dialog box.
+  int pos = 0;
+  if (GetSaveFileName(&ofn)==TRUE)
+  {
+    while(ofn.lpstrFile[pos] != '\0')
+    {
+      buffer[pos] = (char)ofn.lpstrFile[pos];
+      pos++;
+    }
+    buffer[pos] = 0;
+  }
+
+#else
+        // For every other machine type use zenity
+        FILE * output = popen("/usr/bin/zenity --directory --file-selection --save","r");
+        if (output)
+        {
+            auto ret = fgets(buffer, FILE_DIALOG_MAX_BUFFER, output);
+            if (ret == NULL || ferror(output))
+            {
+                // I/O error
+                buffer[0] = '\0';
+            }
+            if (buffer[FILE_DIALOG_MAX_BUFFER - 1] == '\0')
+            {
+                // File name too long, buffer has been filled, so we return empty string instead
+                buffer[0] = '\0';
+            }
+        }
+
+        // Replace last '\n' by '\0'
+        if(strlen(buffer) > 0)
+        {
+            buffer[strlen(buffer)-1] = '\0';
+        }
+
+#endif
+        return std::string(buffer);
+    }
+
+} // ssim
+
+#endif //EXAMPLE_UTIL_H