Josh

Another video demonstrates how to reliably create the error:

Here is a demonstration that proves the cause:

Interesting vote results. I would have expected people would agree with you. Usually if you phrase something in terms that sound like functionality is being restricted, people react against it.

The Newton developer has confirmed there may be an issue here...

I may have found the cause, although it's not a complete explanation. The most problematic shapes are wedges with the pivot point outside of the convex hull: A wedge by default will have the pivot point right along one of the faces, which might occassionally cause collision to fail, if there is a problem like this. This explains why your wedge was failing frequently, but a new wedge did not have the same problem. This is still a bug. I don't have a complete answer yet. But I believe I am on the right track now.

I am replacing the convex hull primitive that brushes use with a polygon mesh collision shape, which should solve both the problems here. Stay tuned...

Package:Close was declared incorrectly in my Lua binding code. Will be fixed in next update.

The slope standing issue seems to get fixed just by recreating the wedge. That doesn't explain why it is happening of course. The disappearing collision issue is much more serious. I recompiled Newton Dynamics as a DLL, which is its default configuration, instead of compiling the source code straight into the engine. Then I ran my test app 100 times and couldn't produce the error. Originally one of my goals was to eliminate DLLs, but I don't think that's a very good goal. Stay tuned for an update. Pasting my test code here for later use: #include "Leadwerks.h" using namespace Leadwerks; int main(int argc, const char* argv[]) { //Get the displays auto displays = GetDisplays(); //Create a window auto window = CreateWindow("Leadwerks", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR | WINDOW_HIDDEN); auto ui = CreateInterface(window); ui->background->SetColor(0,0,0); window->SetHidden(false); window->Activate(); ui = nullptr; //Create a framebuffer auto framebuffer = CreateFramebuffer(window); //Create a world auto world = CreateWorld(); world->SetGravity(0, -30, 0); world->SetAmbientLight(0); //Create the player auto player = CreatePivot(world); player->SetPhysicsMode(PHYSICS_PLAYER); player->SetMass(10); player->SetCollisionType(COLLISION_PLAYER); //Create a camera auto camera = CreateCamera(world); camera->SetClearColor(0.125); camera->SetPosition(0, 1, -8); camera->SetFov(70); camera->SetPosition(0, 1.6, 0); camera->SetPosition(player->position + Vec3(0, 1.7, 0)); camera->Turn(0, 180, 0); camera->SetMouseLook(true); auto scene = LoadScene(world, "Maps/Testing.map"); Vec3 camrotation = camera->GetRotation(); Vec2 mouseaxis = window->GetMouseAxis().xy(); const float lookspeed = 200; const float movespeed = 3.5; const float maxaccel = 40; const float maxdecel = 15; const float mousesmoothing = 3; const float runspeed = 2; const float jumpstrength = 12; const float lunge = 1.5; window->SetCursor(CURSOR_NONE); //Main loop while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false) { if (window->KeyHit(KEY_SPACE)) { //Create the player player = CreatePivot(world); player->SetPhysicsMode(PHYSICS_PLAYER); player->SetMass(10); player->SetCollisionType(COLLISION_PLAYER); } if (ActiveWindow() == window) { //Camera look camrotation = camera->rotation; //Movement float accel = maxaccel; Vec2 movement; movement.y = (window->KeyDown(KEY_W) - window->KeyDown(KEY_S)); movement.x = (window->KeyDown(KEY_D) - window->KeyDown(KEY_A)); if (movement.x != 0.0f and movement.y != 0.0f) { //Adjust speed on each axis if both are in use movement *= 0.7071f; } movement *= movespeed; float jump = window->KeyHit(KEY_SPACE) * jumpstrength; bool crouch = window->KeyDown(KEY_C); if (player->GetAirborne()) jump = 0; if (crouch == false and window->KeyDown(KEY_SHIFT) and !player->GetAirborne()) { movement *= runspeed; } if (jump > 0 and crouch == false) { movement *= lunge; accel *= 100; } //Set input player->SetInput(camrotation.y, movement.y, movement.x, jump, crouch, accel, maxdecel); } world->Update(); //Adjust camera position float eyeheight = 1.7f; if (player->GetCrouched()) { eyeheight = 1.8f * 0.5f - 0.1f; } camera->SetPosition(Mix(camera->position.x, player->position.x, 0.5f), MoveTowards(camera->position.y, player->position.y + eyeheight, 0.1f), Mix(camera->position.z, player->position.z, 0.5f)); camera->SetPosition(player->position.x, MoveTowards(camera->position.y, player->position.y + eyeheight, 0.1f), camera->position.z); world->Render(framebuffer); } return 0; }

I will find the cause. Updating Newton now, and if I have to file a report with Julio I will.

You window probably isn't hidden to start with.

I was able to produce the error once when compiled from source, in a simple program, so that eliminates a lot of possible causes. The problem is with the wedge itself, not the player, because I added code to recreate the player when I press a key, and the new player has the same problem...

If you want to make the window background black before graphics start rendering, here is one possible way: auto window = CreateWindow("Leadwerks", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR | WINDOW_HIDDEN); auto ui = CreateInterface(window); ui->background->SetColor(0,0,0); window->SetHidden(false); window->Activate(); ui = nullptr; If you do this in Lua make sure you call collectgarbage() to delete the UI object.

You don't need to do any more testing for now. I found where the problem is, but I don't see why it is happening yet. Will continue work on this tomorrow.

This will take some more time to figure out...

Is there anything special about the large wedge? Was it made using the carve tool? I tried creating a new wedge the exact same size, and that one works perfectly. If I step on your wedge, the player bounces up and down and I hear the footstep landing sound, but my own new wedge works fine.