reorganize to use .bat files instead of .sh. Move demo to an example project

examples/demo/build.bat

@@ -0,0 +1,12 @@
+SET flags=-Od -ZI -MD
+IF "%1" == "release" (
+    SET flags=-O2 -MT
+)
+SET srcs=src\*
+mkdir bin obj
+(
+PUSHD ..\..
+CALL build.bat %1 
+POPD
+COPY /Y ..\..\bin\* bin && cl %srcs% bin\LivePlotter.lib -I ..\..\inc -I ..\..\ext\glm %flags% -std:c++20 -MP -Fo:obj\\ -Fe:bin\\
+)

examples/demo/export.bat

@@ -0,0 +1,22 @@
+@ECHO off
+SETLOCAL ENABLEDELAYEDEXPANSION
+
+ECHO [ > compile_commands.json
+
+FOR /r "src\" %%F IN (*.cpp) DO (
+
+SET "file=%%F"
+SET "file=!file:\=/!"
+SET "directory=%~dp0"
+SET "directory=!directory:\=/!"
+
+ECHO { >> compile_commands.json
+ECHO "directory": "!directory!", >> compile_commands.json
+ECHO "command": "cl !file! -I inc -I ../../ext/glm -I ../../ext/glfw/include %flags% -std:c++20 -MD -MP -Fo:obj\\ ", >> compile_commands.json
+
+ECHO "file": "!file!" >> compile_commands.json
+ECHO }, >> compile_commands.json
+
+)
+
+ECHO ] >> compile_commands.json

examples/demo/src/demo.cpp

@@ -0,0 +1,93 @@
+#include <iostream>
+#include <string>
+#include <map>
+
+#include "glm/ext/vector_float3.hpp"
+#include "util.hpp"
+#include "live_plotter.hpp"
+
+#pragma comment(lib, "LivePlotter.lib")
+
+using namespace std;
+
+static map<string, pointid> name_to_id;
+
+#define LINE_BUF_SIZE 256
+#define NUM_SPHERES_PER_AXE 25
+#define SPACE_PER_SPHERE 10.0f
+
+bool parse_poses(std::vector<glm::mat2x3>& locs_out, const char* filepath) {
+    ifstream file(filepath);
+    if (!file.is_open()) {
+        return false;
+    }
+
+    string line;
+    getline(file, line);
+    while (getline(file, line)) {
+        std::vector<std::string> words = split_str(line, ',');
+        float x = stof(words[0]);
+        float y = stof(words[1]);
+        float z = stof(words[2]);
+        float w = stof(words[3]);
+        float i = stof(words[4]);
+        float j = stof(words[5]);
+        float k = stof(words[6]);
+
+        glm::mat4 pose = quat_to_mat4(glm::quat(w, i, j, k));
+        pose[3] = glm::vec4(x, y, z, 1);
+        // Generate axis spheres
+        for (int m = 0; m < 3; m++) {
+            for (int n = 0; n < NUM_SPHERES_PER_AXE; n++) {
+                glm::mat2x3 loc_color = glm::mat2x3(0.0);
+                loc_color[0][m] = n * SPACE_PER_SPHERE;
+                loc_color[0] = pose * glm::vec4(loc_color[0], 1);
+
+                loc_color[1] = glm::vec3(0);
+                loc_color[1][m] = 1.0f;
+                locs_out.push_back(loc_color);
+            }
+        }
+    }
+    return true;
+}
+
+int main() {
+    vector<glm::mat2x3> camera_pose_axes;
+    if (!parse_poses(camera_pose_axes, "poses.csv")) {
+        return -1;
+    }
+
+    start(800, 800);
+
+    for (int i = 0; i < camera_pose_axes.size(); i++) {
+        glm::vec3 p = camera_pose_axes[i][0];
+        glm::vec3 color = camera_pose_axes[i][1];
+        pointid id = create_point(p.x, p.y, p.z);
+        set_color(id, color.x, color.y, color.z);
+        set_scale(id, 10);
+    }
+
+    while (true) {
+        string line;
+        getline(cin, line);
+        vector<string> words = split_str(line, ' ');
+        if (words.size() != 4)
+            return NULL;
+        printf("Received: %s, %s, %s, %s\n", words[0].c_str(), words[1].c_str(), words[2].c_str(),
+
+            words[3].c_str()); // echo for debugging
+        string name = words[0];
+        float x = stof(words[1]);
+        float y = stof(words[2]);
+        float z = stof(words[3]);
+
+        if (auto it = name_to_id.find(name); it != name_to_id.end()) {
+            update_point(it->second, x, y, z);
+        } else {
+            name_to_id[name] = create_point(x, y, z);
+            set_lifetime(name_to_id[name], 0.2);
+            set_scale(name_to_id[name], 15);
+        }
+    }
+}

examples/demo/src/util.cpp

@@ -0,0 +1,40 @@
+#include "util.hpp"
+
+using namespace std;
+
+bool read_file(string* s, const char* filepath) {
+    ifstream file(filepath);
+    if (!file.is_open()) {
+        return false;
+    }
+    *s = { istreambuf_iterator<char>(file), istreambuf_iterator<char>() };
+    return true;
+}
+
+vector<string> split_str(string s, char delim) {
+    vector<string> res;
+    string cur_word;
+    istringstream ss(s);
+    while (getline(ss, cur_word, delim)) {
+        res.push_back(cur_word);
+    }
+    return res;
+}
+
+// https://songho.ca/opengl/gl_quaternion.html
+glm::mat4 quat_to_mat4(glm::quat q) {
+    glm::vec4 col0 = glm::vec4(
+        1 - 2 * q.y * q.y - 2 * q.z * q.z, 2 * q.x * q.y + 2 * q.w * q.z, 2 * q.x * q.z - 2 * q.w * q.y, 0);
+
+    glm::vec4 col1 = glm::vec4(
+        2 * q.x * q.y - 2 * q.w * q.z, 1 - 2 * q.x * q.x - 2 * q.z * q.z, 2 * q.y * q.z + 2 * q.w * q.x, 0);
+
+    glm::vec4 col2 = glm::vec4(
+        2 * q.x * q.z + 2 * q.w * q.y, 2 * q.y * q.z - 2 * q.w * q.x, 1 - 2 * q.x * q.x - 2 * q.y * q.y, 0);
+
+    glm::vec4 col3 = glm::vec4(0, 0, 0, 1);
+
+    return glm::mat4(col0, col1, col2, col3);
+}
+
+float randf() { return (float)abs(rand()) / (float)RAND_MAX; }