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 WIN32_LEAN_AND_MEAN
#include <windows.h>

#define _USE_MATH_DEFINES

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:

mmozeiko

This downloads standalone MSVC compiler, linker & other tools, also headers/libraries from Windows SDK into portable folder, without installing Visual Studio. Has bare minimum components - no UWP/Store/WindowsRT stuff, just files & tools for native desktop app development.

Run py.exe portable-msvc.py and it will download output into msvc folder. By default it will download latest available MSVC & Windows SDK - currently v14.40.33807 and v10.0.26100.0.

You can list available versions with py.exe portable-msvc.py --show-versions and then pass versions you want with --msvc-version and --sdk-version arguments.

To use cl.exe/link.exe first run setup_TARGET.bat - after that PATH/INCLUDE/LIB env variables will be updated to use all the tools as usual. You can also use clang-cl.exe with these includes & libraries.

To use clang-cl.exe without running setup.bat, pass extra /winsysroot msvc argument (msvc is folder name where output is stored).

dwilliamson

//
// Lookup Tables for Transvoxel's Modified Marching Cubes
//
// Unlike the original paper (Marching Cubes: A High Resolution 3D Surface Construction Algorithm), these tables guarantee
// a closed mesh "whose connected components are continuous and free of holes."
//
// Rotations are prioritised over inversions so that 3 of the 6 cases containing ambiguous faces are never added. 3 extra
// cases are added as a post-process, overriding inverses through custom-build rotations to eliminate the rest.
//
// Uses the exact same co-ordinate system as https://gist.github.com/dwilliamson/c041e3454a713e58baf6e4f8e5fffecd

d7samurai

Minimal D3D11 pt2

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 th

mmozeiko

#pragma once

#include <stdint.h>

#define PCG_DEFAULT_MULTIPLIER_64 6364136223846793005ULL
#define PCG_DEFAULT_INCREMENT_64  1442695040888963407ULL

typedef struct {
    uint64_t state;
} pcg32;

mmozeiko

// example how to set up D3D11 rendering on Windows in C

#define COBJMACROS
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <d3d11.h>
#include <dxgi1_3.h>
#include <d3dcompiler.h>
#include <dxgidebug.h>

mmozeiko

// example how to set up OpenGL core context on Windows
// and use basic functionality of OpenGL 4.5 version

// important extension functionality used here:
// (4.3) KHR_debug:                     https://www.khronos.org/registry/OpenGL/extensions/KHR/KHR_debug.txt
// (4.5) ARB_direct_state_access:       https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_direct_state_access.txt
// (4.1) ARB_separate_shader_objects:   https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_separate_shader_objects.txt
// (4.2) ARB_shading_language_420pack:  https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_shading_language_420pack.txt
// (4.3) ARB_explicit_uniform_location: https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_explicit_uniform_location.txt

mmozeiko

#define COBJMACROS
#define NOMINMAX
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <d3d11.h>

#include <stdint.h>
#include <string.h>
#include <intrin.h>

Joshua-Ashton

template <class _Ty>
_NODISCARD /* constexpr */ _Ty _Common_lerp(const _Ty _ArgA, const _Ty _ArgB, const _Ty _ArgT) noexcept {
    // on a line intersecting {(0.0, _ArgA), (1.0, _ArgB)}, return the Y value for X == _ArgT

    const int _Finite_mask = (int{isfinite(_ArgA)} << 2) | (int{isfinite(_ArgB)} << 1) | int{isfinite(_ArgT)};
    if (_Finite_mask == 0b111) {
        // 99% case, put it first; this block comes from P0811R3
        if ((_ArgA <= 0 && _ArgB >= 0) || (_ArgA >= 0 && _ArgB <= 0)) {
            // exact, monotonic, bounded, determinate, and (for _ArgA == _ArgB == 0) consistent:
            return _ArgT * _ArgB + (1 - _ArgT) * _ArgA;