Frank Luo longluo

## animate.cpp
#include <cstdio>
#include <cmath>
#include <string>
#include "raylib.h"
#include "waterpool.hpp"

const int WIDTH = 160;
const int HEIGHT = 160;
using PoolType = Sapphire::WaterPool<WIDTH, HEIGHT>;

## 無用知識的有用性.md

      
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                longluo
                / 無用知識的有用性.md
            
            
              Created
              May 12, 2023 12:18
                — forked from JuanitoFatas/無用知識的有用性.md
            
              
                無用知識的有用性
              
          
    无用知识的有用性

弗莱克斯纳
[按] 30年代美国普林斯顿大学校长亚伯拉罕·弗莱克斯纳(Abraham Flexner)教授曾以
“无用知识的有用性”为题，发表过一篇在科学界有影响的文章。该文章强调了基础研
究以及自由探索的重要性。全文一万余字，现节译如下，以餐读者。
　　智力与精神生活在表面上是一种无用型活动。人们之所以大量从事这种活动，是因

  
## Damped_Double_Pendulum_Simulation.py
#=======================================================================================================================================
# This script computes the equation of motion of a damped double pendulum using a full Newtonian analysis with sympy,
# then solve them numerically, and finally visualize the solution using matplotlib.
#=======================================================================================================================================


import sympy as sp
import numpy as np
import matplotlib.pyplot as plt

## nyquist.ipynb

      
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                t-mart
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              Last active
              March 27, 2024 03:02
            
          
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## sin-cos-approximations-gist.adoc

      
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                publik-void
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                Fast MiniMax Polynomial Approximations of Sine and Cosine
              
          
    Fast MiniMax Polynomial Approximations of Sine and Cosine


## install_android_sdk_tools_in_linux_for_custom_ci.md

      
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                Ashok-Varma
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                Install Android SDK tools in linux. Can be used for custom CI (Continuous Integration)
              
          
    This post shows how to install android sdk tools without Android Studio. We might need to do in many cases like setting up an CI machine ..etc
We need java, android(tools, build tools), gradle.
Table of contents


Setup server

System Requirements
Install java Jdk


Install sdk tools


## paynehanek.jl
import Base: TwicePrecision, significand_bits, significand_mask, exponent_mask, exponent_bias

# Bits of 1/2π
#   1/2π == sum(x / 0x1p64^i for i,x = enumerate(INV2PI))
# Can be obtained by:
#
#    setprecision(BigFloat, 4096)
#    I = 0.5/big(pi)
#    for i = 1:19
#        I *= 0x1p64

## DrawSineWave.html
<!DOCTYPE html>
<html>

<head>
    <title>Sine Wave</title>
    <script type="text/javascript">
        function showAxes(ctx,axes) {
            var width = ctx.canvas.width;
            var height = ctx.canvas.height;
            var xMin = 0;

## DPGEGDX Ray Cast

public static float dist(float x1, float y1, float x2, float y2) {
    return (float) Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
}

public static float getRayCast(float p0_x, float p0_y, float p1_x, float p1_y, float p2_x, float p2_y, float p3_x, float p3_y) {
    float s1_x, s1_y, s2_x, s2_y;
    s1_x = p1_x - p0_x;
    s1_y = p1_y - p0_y;
    s2_x = p3_x - p2_x;

## CouponCollectors.py
# simulate coupon collector's problem

import numpy as np


def run(n):
    """
    n: number of different coupons (stamps)
    return: days it took to achieve such goal
    """
	#include <cstdio>
	#include <cmath>
	#include <string>
	#include "raylib.h"
	#include "waterpool.hpp"

	const int WIDTH = 160;
	const int HEIGHT = 160;
	using PoolType = Sapphire::WaterPool<WIDTH, HEIGHT>;
	#=======================================================================================================================================
	# This script computes the equation of motion of a damped double pendulum using a full Newtonian analysis with sympy,
	# then solve them numerically, and finally visualize the solution using matplotlib.
	#=======================================================================================================================================


	import sympy as sp
	import numpy as np
	import matplotlib.pyplot as plt
	import Base: TwicePrecision, significand_bits, significand_mask, exponent_mask, exponent_bias

	# Bits of 1/2π
	# 1/2π == sum(x / 0x1p64^i for i,x = enumerate(INV2PI))
	# Can be obtained by:
	#
	# setprecision(BigFloat, 4096)
	# I = 0.5/big(pi)
	# for i = 1:19
	# I *= 0x1p64
	<!DOCTYPE html>
	<html>

	<head>
	<title>Sine Wave</title>
	<script type="text/javascript">
	function showAxes(ctx,axes) {
	var width = ctx.canvas.width;
	var height = ctx.canvas.height;
	var xMin = 0;

	public static float dist(float x1, float y1, float x2, float y2) {
	return (float) Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
	}

	public static float getRayCast(float p0_x, float p0_y, float p1_x, float p1_y, float p2_x, float p2_y, float p3_x, float p3_y) {
	float s1_x, s1_y, s2_x, s2_y;
	s1_x = p1_x - p0_x;
	s1_y = p1_y - p0_y;
	s2_x = p3_x - p2_x;
	# simulate coupon collector's problem

	import numpy as np


	def run(n):
	"""
	n: number of different coupons (stamps)
	return: days it took to achieve such goal
	"""