add static simulation interfaces

src/viewer/ColorbarPlugin.h

@@ -0,0 +1,135 @@
+//
+// Created by cflin on 4/8/23.
+//
+
+#ifndef RIGIDIPC_COLORBARPLUGIN_H
+#define RIGIDIPC_COLORBARPLUGIN_H
+
+#include <Eigen/Dense>
+#include <igl/opengl/glfw/Viewer.h>
+#include <igl/opengl/glfw/imgui/ImGuiMenu.h>
+
+class ColorbarPlugin {
+public:
+     ColorbarPlugin() {
+         // initialize
+        Eigen::MatrixXd rgb;
+        Eigen::MatrixXd f=Eigen::VectorXd::LinSpaced(100,0.0,1.0);
+        for (size_t i = 0; i < igl::NUM_COLOR_MAP_TYPES; ++i) {
+            GLuint id = 0;
+            igl::colormap(static_cast<igl::ColorMapType>(i),f,0.0,1.0,rgb);
+//            std::cout<<std::endl;
+//            std::cout<<rgb<<std::endl;
+            texture_from_colormap(rgb, id);
+            colormaps_[i] = id;
+        }
+    }
+
+// Draws a combo box for selecting the colormap
+    int draw_colormap_combo() const {
+        const char *items[]{
+                "Inferno",
+                "Jet",
+                "Magma",
+                "Parula",
+                "Plasma",
+                "Viridis",
+        };
+        static int selected_index = 5;
+        static const char *current_item = items[selected_index];
+        ImVec2 combo_pos = ImGui::GetCursorScreenPos();
+        if (ImGui::BeginCombo("Colormap##combo", "")) {
+            for (int n = 0; n < IM_ARRAYSIZE(items); ++n) {
+                // You can store your selection however you want, outside or inside your objects
+                bool is_selected = (current_item == items[n]);
+                ImGui::PushID(n);
+                if (ImGui::Selectable("", is_selected)) {
+                    current_item = items[n];
+                    selected_index = n;
+                }
+                ImGui::SameLine(0, 0);
+                ImGui::Image(
+                        reinterpret_cast<ImTextureID>(colormaps_[n]),
+                        ImVec2(ImGui::GetTextLineHeight(), ImGui::GetTextLineHeight()),
+                        ImVec2(0, 0), ImVec2(1, 1));
+                ImGui::SameLine();
+                ImGui::Text("%s", items[n]);
+                if (is_selected) {
+                    ImGui::SetItemDefaultFocus();
+                }
+                ImGui::PopID();
+            }
+            ImGui::EndCombo();
+        }
+
+        ImVec2 backup_pos = ImGui::GetCursorScreenPos();
+        ImGuiStyle &style = ImGui::GetStyle();
+        ImGui::SetCursorScreenPos(ImVec2(combo_pos.x + style.FramePadding.x, combo_pos.y + style.FramePadding.y));
+        float h = ImGui::GetTextLineHeight();
+        ImGui::Image(
+                reinterpret_cast<ImTextureID>(colormaps_[selected_index]),
+                ImVec2(h, h));
+        ImGui::SameLine();
+        ImGui::Text("%s", current_item);
+        ImGui::SetCursorScreenPos(backup_pos);
+
+        return selected_index;
+    }
+
+    void draw_colorbar(igl::ColorMapType cm, float xmin, float xmax,
+                       const Eigen::Vector4f &background_color) const {
+        ImVec4 color(0, 0, 0, 1);
+        auto rgb = background_color;
+        // http://stackoverflow.com/a/3943023/112731
+        if (rgb[0] * 0.299 + rgb[1] * 0.587 + rgb[2] * 0.114 > 186) {
+            color = ImVec4(1, 1, 1, 1);
+        }
+        float w = 20;
+        float h = 100;
+        ImGui::BeginGroup();
+        ImGui::BeginGroup();
+        ImGui::TextColored(color, "%.3g", xmin);
+        ImGui::Dummy(ImVec2(0, h - 2 * ImGui::GetTextLineHeightWithSpacing()));
+        ImGui::TextColored(color, "%.3g", xmax);
+        ImGui::EndGroup();
+        ImGui::SameLine();
+        ImGui::Image(reinterpret_cast<ImTextureID>(colormaps_[cm]), ImVec2(w, h));
+        ImGui::EndGroup();
+    }
+
+    static void texture_from_colormap(const Eigen::MatrixXd &rgb, GLuint &id) {
+        int width = 1;
+        int height = (int) rgb.rows();
+
+        Eigen::Matrix<unsigned char, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor> cmap;
+        if (rgb.maxCoeff() > 1.0) {
+            cmap = rgb.cast<unsigned char>();
+        } else {
+            cmap = (rgb.array() * 255.f).cast<unsigned char>();
+        }
+        assert(cmap.cols() == 3);
+        cmap.conservativeResize(cmap.rows(), 4);
+        cmap.col(3).setConstant(255);
+
+        if (id == 0) {
+            glGenTextures(1, &id);
+        }
+        glBindTexture(GL_TEXTURE_2D, id);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexImage2D(
+                GL_TEXTURE_2D, 0, GL_RGBA,
+                width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, cmap.data());
+        glGenerateMipmap(GL_TEXTURE_2D);
+        glBindTexture(GL_TEXTURE_2D, 0);
+    }
+
+protected:
+    std::array<GLuint, igl::NUM_COLOR_MAP_TYPES> colormaps_;
+    igl::ColorMapType colormap_type_ = igl::COLOR_MAP_TYPE_VIRIDIS;
+};
+
+
+#endif //RIGIDIPC_COLORBARPLUGIN_H

src/viewer/UIStaticSimState.h

@@ -15,26 +15,26 @@
 #include <igl/png/render_to_png.h>
 #include <igl/png/writePNG.h>
 #include <igl/jet.h>
+#include <igl/colormap.h>
 #include <viewer/igl_viewer_ext.hpp>
 
 #include "UISimState.hpp"
 #include "path_config.h"
 #include "../../static_sim/StaticSim.h"
-
+#include "ColorbarPlugin.h"
 namespace ipc {
     namespace rigid {
         struct GUICtrl {
             bool mesh_visible = true;
             bool single_color = false;
+            ssim::SimTargetOption::Target target_to_evaluate = ssim::SimTargetOption::U_NORM;
         };
 
         class UIStaticSimState : public UISimState {
             typedef igl::opengl::glfw::imgui::ImGuiMenu Super;
         public:
-            UIStaticSimState(std::shared_ptr<ssim::StaticSim> sp_StaticSim) : UISimState(),sp_StaticSim_(sp_StaticSim),display_target(ssim::SimTargetOption::U_NORM) {
+            UIStaticSimState(std::shared_ptr<ssim::StaticSim> sp_StaticSim) : UISimState(), sp_StaticSim_(sp_StaticSim),
-                // set gui_ctrl_;
+                                                                              gui_ctrl_() {
-                gui_ctrl_.single_color = true;
-                gui_ctrl_.mesh_visible = true;
             }
 
             virtual ~UIStaticSimState() override {}
@@ -56,7 +56,7 @@ namespace ipc {
                 ssim::Model model = sp_StaticSim_->get_mesh();
                 const Eigen::MatrixXd &V = model.V;
                 const Eigen::MatrixXi &F = model.F;
-                Eigen::MatrixXd Target = sp_StaticSim_->EvaluateTarget(display_target);
+                Eigen::MatrixXd Target = sp_StaticSim_->EvaluateTarget(gui_ctrl_.target_to_evaluate);
 
                 // plot
                 viewer->data().set_mesh(V, F);
@@ -123,7 +123,7 @@ namespace ipc {
                 const Eigen::MatrixXd &V = model.V;
                 const Eigen::MatrixXi &F = model.F;
 
-                Eigen::MatrixXd Target = sp_StaticSim_->EvaluateTarget(display_target);
+                Eigen::MatrixXd target = sp_StaticSim_->EvaluateTarget(gui_ctrl_.target_to_evaluate);
 
                 // plot
                 viewer->data().set_mesh(V, F);
@@ -136,11 +136,12 @@ namespace ipc {
                 if (!gui_ctrl_.single_color) {
                     //  colormap
                     Eigen::MatrixXd C;
-                    igl::jet(Target, true, C);
+                    igl::jet(target, true, C);
                     viewer->data().set_colors(C);
                 } else {
                     // single color
                     viewer->data().set_colors(Eigen::RowVector3d(1, 0, 0));
+//                    colorbar_plugin_.draw_colorbar(igl::ColorMapType::COLOR_MAP_TYPE_JET,0,1,/*background_color=*/Eigen::Vector4f(1,1,1,0));
                 }
 
 
@@ -158,9 +159,8 @@ namespace ipc {
 
         private:
             std::shared_ptr<ssim::StaticSim> sp_StaticSim_;
-            ssim::SimTargetOption::Target display_target;
             GUICtrl gui_ctrl_;
-
+//            ColorbarPlugin colorbar_plugin_;
         };
 
     } // ipc

static_sim/SimTargetOption.h

@@ -9,9 +9,8 @@ namespace ssim {
 
     class SimTargetOption {
     public:
-        static const int NUM_TARGETS = 10;
         enum Target {
-            U_NORM = 0,S_NORM, S_X, S_Y, S_Z
+            U_NORM = 0, UX, UY, UZ, S_NORM, S_VON_Mises,/*primary stress*/SX, SY, SZ, COMPLIANCE, ENUM_SIZE
         };
 
         SimTargetOption(int init_state = 0) : state(init_state) {}

static_sim/StaticSim.h

@@ -9,6 +9,7 @@
 #include <Eigen/Dense>
 #include <spdlog/spdlog.h>
 #include "SimTargetOption.h"
+
 namespace ssim {
     struct Model {
         Eigen::MatrixX3d V;
@@ -17,6 +18,7 @@ namespace ssim {
         Model() = default;
 
         Model(const Eigen::MatrixX3d &V, const Eigen::MatrixX3i &F) : V(V), F(F) {}
+
         int NumVertex() const {
             return V.rows();
         };
@@ -27,44 +29,39 @@ namespace ssim {
         using StlModel = Model;
     public:
 
-        StaticSim(const SimTargetOption &option,const std::string & obj_path){
+        StaticSim(const SimTargetOption &option, const std::string &obj_path) : option_(option) {
             igl::readOBJ(obj_path, mesh_.V, mesh_.F);
-            // set option
+            int ENUM_SIZE=SimTargetOption::Target::ENUM_SIZE;
-            option_=option;
+            map_target_to_evaluated_.resize(ENUM_SIZE);
-            map_target_to_evaluated_.resize(option_.NUM_TARGETS);
-            for (int i = 0; i < option_.NUM_TARGETS; ++i) {
-                if(option_.is_option_set(i))
-                    MapAppendTarget(i);
-            }
-        }
 
-        StaticSim(const StlModel &stl, const SimTargetOption &option) : stl_(stl), option_(option) {
+            // TODO: meshing(fill mesh_ and stl_) && boundary condition && solve
-            map_target_to_evaluated_.resize(option_.NUM_TARGETS);
-            // TODO: boundary condition && solve
 
-            for (int i = 0; i < option_.NUM_TARGETS; ++i) {
+            // Save results to map_target_to_evaluated_
+            for (int i = 0; i < ENUM_SIZE; ++i) {
+                if (option_.is_option_set(i))
                     MapAppendTarget(i);
             }
-            // ...
         }
 
+
         Eigen::MatrixXd EvaluateTarget(SimTargetOption::Target target) {
             if (!option_.is_option_set(target)) {
-                // new target, update option_ and map_
+                // If no cache, update option_ and map_
                 MapAppendTarget(target);
                 option_.set_option(target);
             }
+            // Return cache
             return map_target_to_evaluated_[target];
         }
 
-        void set_stl(const std::string &stl_path) {
+        /// Model after meshing
-            // TODO read stl file
+        /// \return Model
-        }
-
         Model get_mesh() const {
             return mesh_;
         }
 
+        /// Origin model(.stl or .obj)
+        /// \return Model
         Model get_stl() const {
             return stl_;
         }
@@ -75,27 +72,85 @@ namespace ssim {
         SimTargetOption option_;
         std::vector<Eigen::MatrixXd> map_target_to_evaluated_;
 
+#define RANDOM_COLOR_FOR_DEBUG  (Eigen::VectorXd::LinSpaced(mesh_.NumVertex(),0,100) )
 
+        // TODO: Evaluate
+        // Return: #mesh.V.rows() x 1
         Eigen::MatrixXd EvaluateUNorm() const {
-            // TODO
+            return RANDOM_COLOR_FOR_DEBUG;
-            return (Eigen::VectorXd::Random(mesh_.NumVertex()).array() + 1.0) * 50;
+        }
+
+        Eigen::MatrixXd EvaluateUX() const {
+            return RANDOM_COLOR_FOR_DEBUG;
+        }
+
+        Eigen::MatrixXd EvaluateUY() const {
+            return RANDOM_COLOR_FOR_DEBUG;
+        }
+
+        Eigen::MatrixXd EvaluateUZ() const {
+            return RANDOM_COLOR_FOR_DEBUG;
         }
 
         Eigen::MatrixXd EvaluateSNorm() const {
-            // TODO
+            return RANDOM_COLOR_FOR_DEBUG;
-            return (Eigen::VectorXd::Random(mesh_.NumVertex()).array() + 1.0) * 50;
+        }
+
+        Eigen::MatrixXd EvaluateSVonMises() const {
+            return RANDOM_COLOR_FOR_DEBUG;
         }
 
+        Eigen::MatrixXd EvaluateSX() const {
+            return RANDOM_COLOR_FOR_DEBUG;
+        }
+
+        Eigen::MatrixXd EvaluateSY() const {
+            return RANDOM_COLOR_FOR_DEBUG;
+        }
+
+        Eigen::MatrixXd EvaluateSZ() const {
+            return RANDOM_COLOR_FOR_DEBUG;
+        }
+
+        Eigen::MatrixXd EvaluateCompliance() {
+            return RANDOM_COLOR_FOR_DEBUG;
+        }
+
+
         void MapAppendTarget(int target) {
             switch (target) {
                 case SimTargetOption::U_NORM:
                     map_target_to_evaluated_[target] = EvaluateUNorm();
                     break;
+                case SimTargetOption::UX:
+                    map_target_to_evaluated_[target] = EvaluateUX();
+                    break;
+                case SimTargetOption::UY:
+                    map_target_to_evaluated_[target] = EvaluateUY();
+                    break;
+                case SimTargetOption::UZ:
+                    map_target_to_evaluated_[target] = EvaluateUZ();
+                    break;
                 case SimTargetOption::S_NORM:
                     map_target_to_evaluated_[target] = EvaluateSNorm();
                     break;
+                case SimTargetOption::S_VON_Mises:
+                    map_target_to_evaluated_[target] = EvaluateSVonMises();
+                    break;
+                case SimTargetOption::SX:
+                    map_target_to_evaluated_[target] = EvaluateSX();
+                    break;
+                case SimTargetOption::SY:
+                    map_target_to_evaluated_[target] = EvaluateSY();
+                    break;
+                case SimTargetOption::SZ:
+                    map_target_to_evaluated_[target] = EvaluateSZ();
+                    break;
+                case SimTargetOption::COMPLIANCE:
+                    map_target_to_evaluated_[target] = EvaluateCompliance();
+                    break;
                 default:
-                    spdlog::warn("Wrong target {:d} !(TODO)", target);
+                    spdlog::warn("Wrong target {:d} !", target);
             }
         }