Randomly generate a height map, create a Surface from the heightmap, and add it to the world

createHeightMap.js

'use strict';

// Paste this script into a script component to use


const start = Date.now();
const nLin = 100;
const nCol = 30;

function getMatrix() {
  const matrix = [];
  const m = Math.cos((Date.now() - start) / 1000 * 0.05);
  const a = m * 0.2;
  const b = m * 0.2;
    // var c = m * 0.4;
  for (let i = 0; i < nLin; i++) {
    const row = [];
    if (reverse) {
      matrix.unshift(row);
    } else {
      matrix.push(row);
    }
    for (let j = 0; j < nCol; j++) {
      const value = Math.sin(i * a) * Math.sin(j * b) + 1;

        row.push(value);
    }
  }
  return matrix;
}


function setup(args, ctx) {
	
  // This matrix could come from a web call.
  const matrix = getMatrix();
  const meshData = sumerian.Surface.createFromHeightMap(matrix, 1, 1, 1);
	
  const entity = ctx.world.createEntity(meshData, new sumerian.Material(sumerian.ShaderLib.textured)).addToWorld();
	
  // We need to keep track of our entity...
  ctx.entityData.newEntity = entity;

}

function cleanup(args, ctx) {
  
  //..so that we clean it up at the end
	ctx.entityData.newEntity.removeFromWorld();
}