# fun with Math / pi

written in Vex / Houdini. inspired by Serjan Burlaks work

simple animation of Cos and Sin…. simple Vex program in Houdini and rendered with realtime engine Eevee (blender)

playing with the Sierpinski Gasket in houdini, coding exereise. Houdini Vex is very fast and its easy convert it from my c++ code. the fun Part, i get openGL feedback in realtime with need to code in OpenGL.

float resX = 600;
float resY = 600;
int numVert = 3;
float pi = 3.1415922653;
float rotOffset = pi / 6.0;
vector pos= {0,0,0};

float cx = (resX/2.0)*cos((2*pi/numVert) + rotOffset) + (resX /2);
float cy = (resY/2.0)*sin((2*pi/numVert) + rotOffset) + (resY /2);

int iter = chf(“iteration”);

for(int i=0; i<(iter+15); i++) { int num = int(((rand(i)*32767) % numVert) +1); float xVert = (resX/2) * cos((2*pi*num / numVert) + rotOffset) + (resX/2); float yVert = (resY/2) * sin((2*pi*num / numVert) + rotOffset) + (resY/2); cx += deltaD * (xVert – cx); cy += deltaD * (yVert – cy); if(i>15) {
pos.x = cx;
pos.y = cy;