shaderjp

// Creating a node graph editor for ImGui
// Quick demo, not production code! This is more of a demo of how to use ImGui to create custom stuff.
// Better version by @daniel_collin here https://gist.github.com/emoon/b8ff4b4ce4f1b43e79f2
// See https://github.com/ocornut/imgui/issues/306
// v0.02
// Animated gif: https://cloud.githubusercontent.com/assets/8225057/9472357/c0263c04-4b4c-11e5-9fdf-2cd4f33f6582.gif

// NB: You can use math functions/operators on ImVec2 if you #define IMGUI_DEFINE_MATH_OPERATORS and #include "imgui_internal.h"
// Here we only declare simple +/- operators so others don't leak into the demo code.
static inline ImVec2 operator+(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x+rhs.x, lhs.y+rhs.y); }