| $fn=10; | |
| union() { | |
| difference() { | |
| cylinder(h=4, r=12.5, center=false); | |
| cylinder(h=1, r=10.5, center=false); | |
| translate([0,0,3]) | |
| cylinder(h=1, r=10.5, center=false); | |
| } |
| layer_height = 0.2; | |
| model_height = 1; | |
| union() { | |
| for (i=[0:layer_height:model_height]) { | |
| translate([0,0,i]) | |
| linear_extrude(layer_height) | |
| offset(-i*0.6) | |
| resize([10,10,layer_height]) | |
| import("Symbol.svg", center = true); |
Using data and code from: https://graphics.geometrian.com/research/spectral-primaries.html
See their reference implementation for details (MIT license): https://github.com/geometrian/simple-spectral
This converts sRGB triplet into spectral reflectance, then combines two curves with weighted geometric mean to produce a "mixed" colour.
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
| // "star torus" by davey | |
| int[][] result; | |
| float t, c; | |
| float ease(float p) { | |
| return 3*p*p - 2*p*p*p; | |
| } | |
| float ease(float p, float g) { |
| Right now I can do this in Markdeep source: | |
| ------------------ | |
| Just a test paragraph, move along... | |
| <div class="note"> | |
| Just a note. Don't mind me. | |
| </div> | |
| <div class="warn"> |
| #pragma once | |
| // This provides a library for stubbing and mocking C++ code as is. It works by requiring | |
| // explicit hooks to be inserted into the code that is to be mocked. In a regular build, | |
| // these hooks will do nothing. In a testing build, they will expand to calls into the | |
| // framework here to allow the code being executed to be hijacked from outside. | |
| // | |
| // NOTE: Thread-safety! Arranging fakes must be done on a single thread. Using fakes can | |
| // be done from multiple threads concurrently. | |
| // |
| /* | |
| * Random-Number Utilities (randutil) | |
| * Addresses common issues with C++11 random number generation. | |
| * Makes good seeding easier, and makes using RNGs easy while retaining | |
| * all the power. | |
| * | |
| * The MIT License (MIT) | |
| * | |
| * Copyright (c) 2015-2022 Melissa E. O'Neill | |
| * |
| extern "C" | |
| { | |
| int _fltused; | |
| #ifdef _M_IX86 // following functions are needed only for 32-bit architecture | |
| __declspec(naked) void _ftol2() | |
| { | |
| __asm | |
| { |
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| <!-- | |
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| Markdown -> `ace/mode/markdown` | |
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| Scala- -> `ace/mode/scala` |
