omar ocornut

Why I think Immediate Mode GUI is way to go for GameDev tools

This article is also available here.

Prerequisites

Before you continue, if you don't know what IMGUI is don't bother reading this post, just ignore it, don't write anything in comments section, etc. If you're curious about IMGUI see bottom of this post, otherwise continue whatever you were doing, this post it's not for you. Thanks!

If you know what IMGUI is, for context read following presentations and blog posts:

Common game localizations https://docs.google.com/spreadsheets/d/135HgMYcRDt6vnJN0d-xFMEZUeWjVbc61ETf8uVwHERE/edit#gid=339250473

Polyglot Gamedev Project : Master Sheet 0.9.0 https://docs.google.com/spreadsheets/d/17f0dQawb-s_Fd7DHgmVvJoEGDMH_yoSd8EYigrb0zmM/edit#gid=310116733

Game UI common translation https://docs.google.com/spreadsheets/d/197GYEhPpk0DQTEO0r80v_k_bkGVtUgBB08PP--hqCIA/edit#gid=0

Raw text files containing characters used in different languages such as English, French, German, Chinese, Japanese, Korean.

A week ago I was CC'd in on a thread about Linux packaging, and how to avoid doing it the wrong way (i.e. RPM, Deb, etc.). I've always used MojoSetup and I've never forced distributions to do any additional work, but this is still a new concept to a lot of people. Additionally, Amos suggested that I expand on Itch's FNA appendix, so here's a guide on how I package my games.

This is a bit of an expansion on my MAGFest 2016 presentation, which you can find here:

http://www.flibitijibibo.com/magfest2016/

https://www.youtube.com/watch?v=B83CWUh0Log

I would recommend looking at that first! After that, read on...

	//Get the native window
	NSWindow* cocoaWindow = glfwGetCocoaWindow(glfwWindowPtr);

	NSUInteger lWindowStyle = NSWindowStyleMaskTitled \|
	NSWindowStyleMaskClosable \|
	NSWindowStyleMaskMiniaturizable \|
	NSWindowStyleMaskResizable \|
	NSWindowStyleMaskUnifiedTitleAndToolbar \|
	NSWindowStyleMaskFullSizeContentView;
	//Set the style mask

	/**
	* Cross-platform sleep function for C
	* @param int milliseconds
	*/
	void sleep_ms(int milliseconds)
	{
	#ifdef WIN32
	Sleep(milliseconds);
	#elif _POSIX_C_SOURCE >= 199309L
	struct timespec ts;

	ImGuiStyle& style = ImGui::GetStyle();

	style.ChildWindowRounding = 3.f;
	style.GrabRounding = 0.f;
	style.WindowRounding = 0.f;
	style.ScrollbarRounding = 3.f;
	style.FrameRounding = 3.f;
	style.WindowTitleAlign = ImVec2(0.5f,0.5f);

	style.Colors[ImGuiCol_Text] = ImVec4(0.73f, 0.73f, 0.73f, 1.00f);

	#include <imgui.h>
	#include "imgui_impl_glfw.h"
	#include <stdio.h>
	#include <GLFW/glfw3.h>

	static void error_callback(int error, const char* description)
	{
	fprintf(stderr, "Error %d: %s\n", error, description);
	}

	Shader file (e.g. vertex shader):

	----
	float4 TransformVertex(in float4 pos : POSITION,
	in float2 uvIn : TEXCOORD0,
	in float4x4 worldMatrix : WORLDMATRIX,
	in float4x4 projMatrix : PROJECTIONMATRIX,
	in float4x4 viewMatrix : VIEWMATRIX,
	out float2 uvOut : TEXCOORD0)
	{

	//
	// imgui_color_gradient.cpp
	// imgui extension
	//
	// Created by David Gallardo on 11/06/16.


	#include "imgui_color_gradient.h"
	#include "imgui_internal.h"


	const int ENTRY_COUNT = 10;
	const char* ENTRIES[ENTRY_COUNT] =
	{
	"Entry 0",
	"Entry 1",
	"Entry 2",
	"Entry 3",
	"Entry 4",
	"Entry 5",