Meshes | Simple Python Module to load construct parse | Service Mesh library

One way to determine what section of your terrain should be culled is to use a quadtree (for a heightmap) or an octree (for a voxel map). Basically, you divide your terrain into little chunks that then get divided further accordingly. You can then test if these chunks are in your viewing frustum and cull them if necessary. This technique was already discussed in great detail:

• Efficient (and well explained) implementation of a Quadtree for 2D collision detection
• https://www.rastertek.com/tertut05.html
• https://gamedev.stackexchange.com/questions/15697/quadtree-terrain-splitting-i-dont-get-it

I saw some websites saying to use GL_DYNAMIC_DRAW instead of GL_STATIC_DRAW, but I did not understand it.

These are usage hints to OpenGL on how the data will be accessed so the implementation has the ability to apply certain optimizations on how to store/use it.

usage is a hint to the GL implementation as to how a buffer object's data store will be accessed. This enables the GL implementation to make more intelligent decisions that may significantly impact buffer object performance. (https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBufferData.xhtml)

Please note that these are only indications, no restrictions:

It does not, however, constrain the actual usage of the data store.

Because you will likely update your VBO's and IBO's constantly (see culling) and only want to draw them GL_DYNAMIC_DRAW would be a good choice:

The data store contents will be modified repeatedly (because of culling) and used many times. The data store contents are modified by the application and used as the source for GL drawing and image specification commands.

as I have googled that it can affect the performance of the game

Well, it will cost some performance to cull your terrain but in the end, it will likely gain performance because many vertices (triangles) can be discarded. This performance gain may grow with larger terrains.

this:

Im running the same issue. I have some scripts that worked so fine in blender 2.83 as module using bpy.ops.transformm.rotate, now this is not working on the new bpy (blender as module) version 2.93.

I realized that bpy.ops.transform.rotate.poll() return false using the module, from python script, while the function bpy.ops.transform.translate.poll() returns true.

However when I run the same function in the scripting console of the blender 2.93 GUI, the function bpy.ops.transform.rotate.poll() returns true.

So I think is a bug in the new version.

However I was able to fix this passing a VIEW_3D context as first argument in the operator:

JavaFX has no built-in concept to animate a triangle mesh. But nothing keeps you from manipulating the geometry of the mesh at runtime yourself. If you can compute the necessary changes of the geometry you can use an AnimationTimer to drive that process.

Because of the way 3d rendering works, it is difficult to completely get rid of the lines. If you are never supposed to see the side texture anyways, I would suggest deleting the sides of the mesh. If that is not an option, try increasing both the near and far culling planes of your camera, as increasing them reduces depth artifacts.

i think a simple google search might have done the trick. The answer that i just gave u, i found on the internet on the unity forums.

It should be the following code pattern (assuming c has no rotated parent):

You actually can't add new values to HashMap while iterating. But you may try to create a temporary map tempMap, add new items to this tempMap and then, after iterating, change your original HashMap (u can use meshMap.putAll(tempMap)).

Also check out HashMap documentation Where you can find

The iterators returned by all of this class's "collection view methods" are fail-fast: if the map is structurally modified at any time after the iterator is created, in any way except through the iterator's own remove method, the iterator will throw a ConcurrentModificationException.

The problem is that you are performing ray casting against a skinned mesh. And three.js is currently (r128) not able to compute proper bounding volumes for this type of 3D object. Bounding volumes however are important for ray casting since they are used to detect early outs.

The workaround for this issue is to manually define bounding volumes so they properly enclose the skinned mesh. I suggest you traverse through gltf.scene and set the boundingSphere and boundingBox property of the skinned mesh's geometry.

More information at GitHub here: https://github.com/mrdoob/three.js/pull/19178

You're encountering this issue because you're using vertexColors at the same time as the material.color property. Each vertex has its own individual color assigned, and when applying a general material color, they multiply together, giving you undesired results. For example, blue * red = black because 255 * 0 = 0