d7samurai

Minimal D3D11 sprite renderer NEO

Ultra-compact sprite rendering code with example frame animation logic. This release contains tech bits from the upcoming SuperNeo™ 2D game engine and includes anchor/pivot point, rotation, color filtering, alpha blending and built-in antialiased point sampling. As usual: complete, runnable single-function app. ~150 LOC. No modern C++, OOP or (other) obscuring cruft.

Sprites are rendered back-to-front (AKA "painter's algorithm") in the order they are submitted, as one draw call. The provided setup employs a single texture atlas containing all the sprite graphics.

The renderer is "im

mmozeiko

MiniPerf

Example of how to capture CPU counters with ETW on Windows, perf on Linux or kperf on Apple.

Using ETW needs somewhat recently updated Windows 10 or 11. Not sure about exact version.

Currently tested on:

• etw on Qualcomm Snapdragon X Elite, Windows 11, arm64
• etw on AMD Zen 3, Windows 11 (with virtualization enabled in BIOS)

futureengine2

static void gi_on_gpu(u8* in_bitmap, int w, int h) {
    #define num_cascades 7
    static bool initialized;
    static gpu_bindgroup_t texture_bindgroup[2];
    static gpu_bindgroup_t cascade_uniform_bindgroup[num_cascades];
    static gpu_bindgroup_t render_uniform_bindgroup;
    static gpu_buffer_t vertex_buffer;
    static gpu_buffer_t uniform_buffer;
    static gpu_pipeline_t pipeline;

JiayinCao

/*
    MIT License

    Copyright (c) 2023 Jiayin Cao

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is

mmozeiko

// example how to set up WebGPU rendering on Windows in C
// uses Dawn implementation of WebGPU: https://dawn.googlesource.com/dawn/
// download pre-built Dawn webgpu.h/dll/lib files from https://github.com/mmozeiko/build-dawn/releases/latest

#include "webgpu.h"

#define _CRT_SECURE_NO_DEPRECATE
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

mmozeiko

#pragma once

// uncompressed png writer & reader
// supports only 8-bit and 16-bit formats

// Performance comparison for 8192x8192 BGRA8 image (256MB)
// Compiled with "clang -O2", AVX2 requires extra "-mavx2" or "/arch:AVX2" argument
//
// For libpng (compressed) uses default libpng/zlib compression settings
// For libpng (uncompressed) case following two functions are used:

d7samurai

Minimal D3D11 bonus material: pixel art antialiasing

A minimal Direct3D 11 implementation of "antialiased point sampling", useful for smooth fractional movement and non-integer scaling of pixel art AKA "fat pixel" aesthetics.

Also view below side-by-side point sampling comparison on YouTube (video is zoomed in to counter implicit downsampling & compression artifacts and make aa effect more apparent) or check out the original Shadertoy.

The actual sampler is set to bilinear filtering (the default D3D11 sampler state) in order to utilize single texture-read hardware interpolation, then emulating point sampling in the shader and applying AA at the fat pixel boundaries. Use with premultiplied alpha textures* and keep a one pixel transparent border around each sprite/tile.

squidarth

-- Zoom Version

on run
	tell application "zoom.us"
		activate
		tell application "System Events" to tell process "zoom.us" to keystroke "a" using {shift down, command down} -- Mute/Unmute command in Zoom
	end tell
end run

-- Google Meet Version

vassvik

Realtime Fluid Simulation: Projection

The core of most real-time fluid simulators, like the one in EmberGen, are based on the "Stable Fluids" algorithm by Jos Stam, which to my knowledge was first presented at SIGGRAPH '99. This is a post about one part of this algorithm that's often underestimated: Projection

MG4_F32.mp4

Stable Fluids

The Stable Fluids algorithm solves a subset of the famous "Navier Stokes equations", which describe how fluids interact and move. In particular, it typically solves what's called the "incompressible Euler equations", where viscous forces are often ignored.

d7samurai

Minimal D3D11 part 2

Follow-up to Minimal D3D11, adding instanced rendering. As before: An uncluttered Direct3D 11 setup & basic rendering primer / API familiarizer. Complete, runnable Windows application contained in a single function and laid out in a linear, step-by-step fashion. No modern C++ / OOP / obscuring cruft.

The main difference here is that the hollow cube is rendered using DrawIndexedInstanced (which saves a lot of vertices compared to the original, so model data is now small enough to be included in the source without being too much in the way), but also all trigonometry and matrix math is moved to the vertex shader, further simplifying the main code.

Each instance is merely this piece of geometry, consisting of 4 triangles:

..which is