thu0x31

{
    "version": 5,
    "configurePresets": [
        {
            "name": "default",
            "hidden": true,
            "generator": "Visual Studio 17 2022",
            "binaryDir": "${sourceDir}/build",
            "architecture": {
                "value": "x64",

thu0x31

// 接線 : https://examist.jp/mathematics/plane-figure/tyouten-setten/
function void drawContactTriangle(vector pA, pB, pC) {
    float lenA = distance(pB, pC);
    float lenB = distance(pA, pC);
    float lenC = distance(pA, pB);

    float x = (lenA + (-lenB - lenC)) / -2;
    vector contactPos0 = pA + normalize(pC - pA) * x;
    int contactPtN0 = addpoint(0, contactPos0);
    setpointgroup(0, "contactPoints", contactPtN0, 1);

thu0x31

function float sidesToIncircleRadius(float A, B, C) {
    float s = (A + B + C) / 2;
    float area = sqrt(s * (s-A) * (s-B) * (s-C));
    float radius = area / s;

    return radius;
}
// https://www.mathopenref.com/coordincenter.html
function void drawInnCircle(vector pA, pB, pC; int totalPoints) {
    // 頂点A,B,Cに対向する辺の長さ

thu0x31

// http://paulbourke.net/geometry/circlesphere/ Intersection of two circles
function vector intersectionTwoCiclesLeft(vector p0, p1; float radius0, radius1) {
    float d = distance(p0, p1);
    float a = (radius0 * radius0 - radius1 * radius1 + d * d) / (2*d);
    float h = sqrt(radius0 * radius0 - a * a);

    vector p2 = p0 + a * (p1 - p0) / d;

    // xz
    return set(

thu0x31

function int[] arcFrom2Points(vector centerPos; float radius; int totalPoints;
                                 vector startPos, endPos;
                                 string direction) {

    float threshold = 0.01;
    if(radius < threshold) {
        return{};
    }

thu0x31

function vector[] innerTangents(vector circle1Pos, circle2Pos;
                                    float circle1Radius, circle2Radius) {
    
    float hypotenuse = distance(circle1Pos, circle2Pos);
    float shortEdgeLen = circle1Radius + circle2Radius;
    float rad = atan2(circle2Pos.z - circle1Pos.z, circle2Pos.x - circle1Pos.x)
                + asin(shortEdgeLen/hypotenuse) - PI/2;
    vector circle1InnerTangent1 = set(
        circle1Pos.x + circle1Radius * cos(rad),
        circle1Pos.y,

thu0x31

function vector[] outerTangents(vector circle1Pos, circle2Pos;
                                    float circle1Radius, circle2Radius) {
    float hypotenuse = distance(circle1Pos, circle2Pos);
    float shortEdgeLen = circle1Radius - circle2Radius;
    
    // xz
    float rad = atan2(circle2Pos.z - circle1Pos.z, circle2Pos.x - circle1Pos.x)
                    + acos(shortEdgeLen/hypotenuse);
    vector circle1OuterTangent1 = set(

thu0x31

• Parameter: Folder
  • Folder Type: Multiparm Block
    • ...

function int[] folderListParam(string sizeChannel; string targetChannel) {
    int size = chi(sizeChannel);
    int params[];

    for (int i = 0; i < size; i++) {
 params[i] = chi(targetChannel + itoa(i + 1));

thu0x31

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);
	return mix(rand(fl), rand(fl + 1.0), fc);
}