DynamicTerrain keeping constantly increasing dynamically

Questions
1

As said, DynamicTerrain keeping constantly increasing dynamically. Btw, it seems work in PlayGround but not in my project.
Any expert could help with how to make it just a fixed size thing at a position? Thanks a lot.

Source are copyied from somewhere as below.
var mapSubX = 1000; // point number on X axis
var mapSubZ = 800; // point number on Z axis

var mapData = new Float32Array(mapSubX * mapSubZ * 3); // 3 float values per point : x, y and z
var mapColors = new Float32Array(mapSubX * mapSubZ * 3); // x3 because 3 values per point : r, g, b
for (var l = 0; l < mapSubZ; l++) {
  for (var w = 0; w < mapSubX; w++) {
    mapData[3 * (l * mapSubX + w)] = (w - mapSubX * 0.5) * 2.0;
    mapData[3 * (l * mapSubX + w) + 1] = w / (l +1) * Math.sin(l / 2) * Math.cos(w / 2) * 2.0;
    mapData[3 * (l * mapSubX + w) + 2] = (l - mapSubZ * 0.5) * 2.0;

    mapColors[3 * (l * mapSubX + w)] = (0.5 + Math.random() * 0.2);
    mapColors[3 * (l * mapSubX + w) + 1] = (0.5 + Math.random() * 0.4);
    mapColors[3 * (l * mapSubX + w) + 2] = (0.5);
  }
}

var terrainSub = 500;             // 20 terrain subdivisions
var params = {
  mapData: mapData,               // data map declaration : what data to use ?
  mapSubX: mapSubX,               // how are these data stored by rows and columns
  mapSubZ: mapSubZ,
  mapColors: mapColors,
  terrainSub: terrainSub          // how many terrain subdivisions wanted
}

var terrain = new DynamicTerrain("t", params, scene);
var terrainMaterial = new StandardMaterial("tm", scene);
terrain.useCustomVertexFunction = true;
terrain.updateVertex = function(vertex: { position: { y: number; }; color: { r: number; b: number; }; }, i: any, j: any) {
  if (vertex.position.y > 2.0) {
    vertex.color.r = 1.0;
    vertex.color.b = 0.2;
  }
};

terrain.update(true);
2

That’s hard to say without a repro. Even an external link would help, if the repro in the Playground does work.

Are you using a clipping plane for this mesh/material?

3

Thank you @Evgeni_Popov for the response. I used clipping plane but not for this mesh.

Btw, I didn’t use original DynamicTerrain extension, but a ES6 Compatible Dynamic Terrain Babylon Extension.
It’s really cool and I see no similar things happened by someone else.

4

You should make sure that the code from this version is in sync with the original dynamic terrain extension code. Maybe there has been some updates/fixes since then?

5

@Evgeni_Popov Thanks for the comments that I am trying to check any updates/fixes so far. I also work out a minimal repro in the attachment though my poor javascript skill.

3DDynamicTerrain.zip (1.6 MB)

Btw, Would you please do my a favor about how could I make a way out. Please just check out “3DDynamicTerrain\src\hooks\useBabylon\core.ts”.

6

The extent of the visible terrain is governed by the terrainSub parameter: you should increase it if you want the visible terrain to go farther.

7

Yes, I try to increase terrainSub and got a larger terrain so that the limit could extend to the edge of skybox.
I think maybe I’m not expressing my needs precisely. Actually I just need something called “StaticTerrain”. Finally I comments all lines like this.update(true); to make it statically. May it’s just a workaround.

Leave that for now.

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