SpiderPig

It works now, thanks.

Can a raw pointer be cast to a shared_ptr? There was just a few things I wanted to create inside component and had to pass the owner entity. I'm sure I'll find another way though so it's no problem.

Is there a reason the only accessible reference to a components entity is a raw pointer? std::weak_ptr<Entity> entityptr; //<-- not accessable? std::map<WString, std::vector<Connection> > connections; friend CComponent; protected: virtual void ReceiveSignal(shared_ptr<Component> sender, const WString& input, std::vector<std::any> arguments); Entity* entity;//<-- Use this one? virtual void Start(); virtual void Update();

I'd like to be able to get the current max force and max torque of a joint.

Using a kinematic joint, if max force is initially 0 I can set it to a higher value at any point in the program by pressing the space bar. How ever if I set maxtorque initially as well, it seems maxforce can't be set to anything other than it's initial value. #include "UltraEngine.h" using namespace UltraEngine; int main(int argc, const char* argv[]) { auto displays = GetDisplays(); auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR); auto framebuffer = CreateFramebuffer(window); auto world = CreateWorld(); auto camera = CreateCamera(world); camera->SetClearColor(0.125); camera->SetPosition(0, 0, -5); auto light = CreateBoxLight(world); light->SetRotation(35, 35, 0); light->SetRange(-20, 20); auto box = CreateBox(world); box->SetMass(1); box->SetColor(0, 1, 0); auto floor = CreateBox(world, 10, .1, 10); floor->SetPosition(0, -2, 0); auto joint = CreateKinematicJoint(box->position, box); joint->SetMaxForce(0.0f); joint->SetMaxTorque(100.0f);//Force won't set to 100 at press of spacebar if this line is used //Main loop float a = 0, y = 0; while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false) { if (window->KeyHit(KEY_SPACE)) { joint->SetMaxForce(100); }//won't set if SetMaxTorque has been used if (window->KeyDown(KEY_RIGHT)) a -= 2; if (window->KeyDown(KEY_LEFT)) a += 2; if (window->KeyDown(KEY_UP)) y += 0.1; if (window->KeyDown(KEY_DOWN)) y -= 0.1; joint->SetPose(Vec3(0, y, 0), Vec3(0, 0, a)); world->Update(); world->Render(framebuffer); } return 0; }

That argument seems commented out at the moment.

On second thought I think it'll introduce too many complications.

This is what I'm doing to transform the objects. void UpdatePhysics(shared_ptr<Entity> source, shared_ptr<Entity> target, shared_ptr<Entity> platform = nullptr) { auto pos = source->GetPosition(); auto rot = source->GetRotation(); if (platform != nullptr) { auto matrix = platform->GetMatrix(); matrix = matrix.Inverse(); matrix.t = Vec4(0, 0, 0, 1); pos = TransformPoint(pos, Mat4(), matrix); rot = TransformRotation(rot, Mat4(), matrix); } target->SetPosition(pos); target->SetRotation(rot); } This may yet not work for all cases, but I wonder if a simple callback system between the physics thread and the rendered world could do this? Basically it would mean we could offset the rendered object away from it's collider. Just thinking out loud.

Got it working with the player controller. I'm going to expand on this and make a complex level with a lot going on to see if it holds up. You can see in the animation that the physics objects don't rotate and none of the rendered objects have colliders. It's just a matter of getting the physics matrix's and transforming them based on what platform is moving.

I think it'll also be needed for moving and turning entities...

Yeah I just noticed things were colliding above my offset collider. Would be nice to see it.

Is it needed for animations?

Thanks. Is the cylinder collider used as the controller's shape or is it something else that's currently invisible when debugging physics?

Okay Thankyou.

If we didn't have any physics objects in the main world and only in a 2nd world, would it still be an issue?

Good to know, thanks. Just checking... latest update is not throwing any errors when I update a 2nd world?

Yeah it would need a mass. I could turn off gravity and it might work for the box on the platform but dosn't for the controller. Also it wouldn't work for a custom collider as they are static. I think I can make my idea work, even without a 2nd world.

Yeah I see what you mean. I think the 2nd example solves it. 🙂

I think I actually might have solved this. I'm reluctant to party until I've tested it further but I can use a 2nd world for physics that has non-moving platforms, then I can transform positions and rotations into the main world which is rendered. Should work for controllers and multiple gravity directions I would think... I wonder if there is a downside to doing it this way...? #include "UltraEngine.h" using namespace UltraEngine; Vec3 mousepos = Vec3(0.0f); float move_adjustment = 0.1f; float move_speed = 1.0f; float lookspeed = 0.1f; float looksmoothing = 0.5f; bool enable_camera = true; int main(int argc, const char* argv[]) { auto displays = GetDisplays(); auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR); auto world = CreateWorld(); auto framebuffer = CreateFramebuffer(window); auto camera = CreateCamera(world); camera->SetClearColor(0.125); camera->SetFov(70); camera->SetPosition(0, 10, -5); auto light = CreateDirectionalLight(world); light->SetRotation(35, 45, 0); auto floor = CreateBox(world, 10.0f, 0.1f, 10.0f); floor->SetPosition(0.0f, -3.0f, 0.0f); floor->SetMaterial(LoadMaterial("Materials\\Developer\\bluegrid.mat")); auto box = CreateBox(world); box->SetCollider(nullptr); // box->SetMass(1.0f); box->SetPosition(2.0f, 2.0f, 0.0f); // box->SetParent(floor); auto player = CreateCylinder(world); player->SetPhysicsMode(PHYSICS_PLAYER); player->SetPosition(0.0f, 5.0f, 0.0f); player->SetMass(1.0f); auto cam_pivot = CreatePivot(world); cam_pivot->SetParent(player); cam_pivot->SetPosition(0.0f, 1.8f, 0.0f); camera->SetParent(cam_pivot); camera->SetPosition(0.0f, 0.0f, -3.0f); camera->SetDebugPhysicsMode(true); auto world_2 = CreateWorld(); auto f2 = CreateBox(world_2, 10.0f, 0.1f, 10.0f); f2->SetPosition(0, -3, 0); auto b2 = CreateBox(world_2); b2->SetMass(1.0f); b2->SetPosition(2.0f, 2.0f, 0.0f); world_2->Update();//No random crash with this? bool stage = 0; while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false) { if (window->KeyHit(KEY_F2) == true) { camera->SetWireframe(!camera->GetWireframe()); } if (window->KeyHit(KEY_F3) == true) { camera->SetDebugPhysicsMode(!camera->GetDebugPhysicsMode()); } if (window->KeyHit(KEY_F4) == true) { enable_camera = !enable_camera; } if (enable_camera) { auto _displaySize = window->GetSize(); float cx = Round((float)_displaySize.x / 2.0f); float cy = Round((float)_displaySize.y / 2.0f); auto mpos = Vec3(window->GetMousePosition().x, window->GetMousePosition().y, window->GetMousePosition().z); window->SetMousePosition(cx, cy); mpos = mpos * looksmoothing + mousepos * (1 - looksmoothing); auto dx = (mpos.x - cx) * lookspeed; auto dy = (mpos.y - cy) * lookspeed; auto camrot = cam_pivot->GetRotation(); camrot.x += dy; camrot.y += dx; cam_pivot->SetRotation(camrot); mousepos = mpos; } floor->Turn(0.0f, 0.1f, 0.0f); auto y_angle = cam_pivot->GetRotation().y; auto move = 0.0f, strafe = 0.0f; if (window->KeyDown(KEY_W)) { move = 1.0f; } else if (window->KeyDown(KEY_S)) { move = -1.0f; } if (window->KeyDown(KEY_A)) { strafe = -1.0f; } else if (window->KeyDown(KEY_D)) { strafe = 1.0f; } player->SetInput(y_angle, move, strafe); if (window->KeyHit(KEY_P)) { b2->AddForce(0,200,0); } world_2->Update(); auto p = b2->GetPosition(); auto r = b2->GetRotation(); auto matrix = floor->GetMatrix(); matrix = matrix.Inverse(); matrix.t = Vec4(0, 0, 0, 1); p = TransformPoint(p, Mat4(), matrix); auto rr = TransformRotation(r, Mat4(), matrix); box->SetPosition(p); box->SetRotation(rr); world->Update(); world->Render(framebuffer); } return 0; }

It seems to be working nicely now if I update world_2 before the main loop. Physics seems to be working in a 2nd world now. I'm about to update my other post..

I'm getting random crashes with this code. Physics in two worlds not supported? #include "UltraEngine.h" using namespace UltraEngine; Vec3 mousepos = Vec3(0.0f); float move_adjustment = 0.1f; float move_speed = 1.0f; float lookspeed = 0.1f; float looksmoothing = 0.5f; bool enable_camera = true; int main(int argc, const char* argv[]) { auto displays = GetDisplays(); auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR); auto world = CreateWorld(); auto framebuffer = CreateFramebuffer(window); auto camera = CreateCamera(world); camera->SetClearColor(0.125); camera->SetFov(70); camera->SetPosition(0, 10, -5); auto light = CreateDirectionalLight(world); light->SetRotation(35, 45, 0); auto floor = CreateBox(world, 10.0f, 0.1f, 10.0f); floor->SetPosition(0.0f, -3.0f, 0.0f); floor->SetMaterial(LoadMaterial("Materials\\Developer\\bluegrid.mat")); auto box = CreateBox(world); box->SetCollider(nullptr); box->SetPosition(2.0f, 2.0f, 0.0f); auto player = CreateCylinder(world); player->SetPhysicsMode(PHYSICS_PLAYER); player->SetPosition(0.0f, 5.0f, 0.0f); player->SetMass(1.0f); auto cam_pivot = CreatePivot(world); cam_pivot->SetParent(player); cam_pivot->SetPosition(0.0f, 1.8f, 0.0f); camera->SetParent(cam_pivot); camera->SetPosition(0.0f, 0.0f, -3.0f); camera->SetDebugPhysicsMode(true); auto world_2 = CreateWorld(); auto f2 = CreateBox(world_2, 10.0f, 0.1f, 10.0f); auto b2 = CreateBox(world_2); b2->SetMass(1.0f); b2->SetPosition(2.0f, 10.0f, 0.0f); bool stage = 0; while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false) { if (window->KeyHit(KEY_F2) == true) { camera->SetWireframe(!camera->GetWireframe()); } if (window->KeyHit(KEY_F3) == true) { camera->SetDebugPhysicsMode(!camera->GetDebugPhysicsMode()); } if (window->KeyHit(KEY_F4) == true) { enable_camera = !enable_camera; } if (enable_camera) { auto _displaySize = window->GetSize(); float cx = Round((float)_displaySize.x / 2.0f); float cy = Round((float)_displaySize.y / 2.0f); auto mpos = Vec3(window->GetMousePosition().x, window->GetMousePosition().y, window->GetMousePosition().z); window->SetMousePosition(cx, cy); mpos = mpos * looksmoothing + mousepos * (1 - looksmoothing); auto dx = (mpos.x - cx) * lookspeed; auto dy = (mpos.y - cy) * lookspeed; auto camrot = cam_pivot->GetRotation(); camrot.x += dy; camrot.y += dx; cam_pivot->SetRotation(camrot); mousepos = mpos; } world_2->Update(); world->Update(); world->Render(framebuffer); } return 0; }

I want to be able have physics working on various different platforms that each have there own velocity and rotations happening. (In this example I'm just turning the floor object, so that might be the wrong way to do that.) On each platform I'd want to have physics working normally as though each platform is it's own little physics world, oblivious to the fact that it's platform is moving about. Just like we can walk on Earth and not feel like were hurtling around the sun and around the Earths axis. I guess this is similar to parenting a player controller to an elevator that moves left and right so the player doesn't slide off the platform as it moves. As the GIF shows, simply parenting the box to the floor breaks the physics sim I think. But the concept is what I'm trying to achieve. The same goes for parenting the player controller to the floor. It looks like it wants to work the way I intend, it just keeps bouncing back and forth. Any one know if this might be possible? #include "UltraEngine.h" using namespace UltraEngine; Vec3 mousepos = Vec3(0.0f); float move_adjustment = 0.1f; float move_speed = 1.0f; float lookspeed = 0.1f; float looksmoothing = 0.5f; bool enable_camera = true; int main(int argc, const char* argv[]) { auto displays = GetDisplays(); auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR); auto world = CreateWorld(); auto framebuffer = CreateFramebuffer(window); auto camera = CreateCamera(world); camera->SetClearColor(0.125); camera->SetFov(70); camera->SetPosition(0, 10, -5); auto light = CreateDirectionalLight(world); light->SetRotation(35, 45, 0); auto floor = CreateBox(world, 10.0f, 0.1f, 10.0f); floor->SetPosition(0.0f, -3.0f, 0.0f); floor->SetMaterial(LoadMaterial("Materials\\Developer\\bluegrid.mat")); auto box = CreateBox(world); box->SetMass(1.0f); box->SetPosition(2.0f, 2.0f, 0.0f); box->SetParent(floor); auto player = CreateCylinder(world); player->SetPhysicsMode(PHYSICS_PLAYER); player->SetPosition(0.0f, 5.0f, 0.0f); player->SetMass(1.0f); auto cam_pivot = CreatePivot(world); cam_pivot->SetParent(player); cam_pivot->SetPosition(0.0f, 1.8f, 0.0f); camera->SetParent(cam_pivot); camera->SetPosition(0.0f, 0.0f, -3.0f); camera->SetDebugPhysicsMode(true); bool stage = 0; while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false) { if (window->KeyHit(KEY_F2) == true) { camera->SetWireframe(!camera->GetWireframe()); } if (window->KeyHit(KEY_F3) == true) { camera->SetDebugPhysicsMode(!camera->GetDebugPhysicsMode()); } if (window->KeyHit(KEY_F4) == true) { enable_camera = !enable_camera; } if (enable_camera) { auto _displaySize = window->GetSize(); float cx = Round((float)_displaySize.x / 2.0f); float cy = Round((float)_displaySize.y / 2.0f); auto mpos = Vec3(window->GetMousePosition().x, window->GetMousePosition().y, window->GetMousePosition().z); window->SetMousePosition(cx, cy); mpos = mpos * looksmoothing + mousepos * (1 - looksmoothing); auto dx = (mpos.x - cx) * lookspeed; auto dy = (mpos.y - cy) * lookspeed; auto camrot = cam_pivot->GetRotation(); camrot.x += dy; camrot.y += dx; cam_pivot->SetRotation(camrot); mousepos = mpos; } floor->Turn(0.0f, 0.1f, 0.0f); auto y_angle = cam_pivot->GetRotation().y; auto move = 0.0f, strafe = 0.0f; if (window->KeyDown(KEY_W)) { move = 1.0f; } else if (window->KeyDown(KEY_S)) { move = -1.0f; } if (window->KeyDown(KEY_A)) { strafe = -1.0f; } else if (window->KeyDown(KEY_D)) { strafe = 1.0f; } player->SetInput(y_angle, move, strafe); world->Update(); world->Render(framebuffer); } return 0; }

Now I think this is a bug... the cylinder falls and lands half way up. It moves around fine. I get it there's an offset of 0.5 but in this case I do not know how to fix it. Modify the vertices? Will that update the collider model too? What shape is the player controller? Is it not using the collider of the model I set PHYSICS_PLAYER on? #include "UltraEngine.h" using namespace UltraEngine; Vec3 mousepos = Vec3(0.0f); float move_adjustment = 0.1f; float move_speed = 1.0f; float lookspeed = 0.1f; float looksmoothing = 0.5f; bool enable_camera = true; int main(int argc, const char* argv[]) { auto displays = GetDisplays(); auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR); auto world = CreateWorld(); auto framebuffer = CreateFramebuffer(window); auto camera = CreateCamera(world); camera->SetClearColor(0.125); camera->SetFov(70); camera->SetPosition(0, 10, -5); auto light = CreateDirectionalLight(world); light->SetRotation(35, 45, 0); auto floor = CreateBox(world, 10.0f, 0.1f, 10.0f); floor->SetPosition(0.0f, -3.0f, 0.0f); floor->SetMaterial(LoadMaterial("Materials\\Developer\\bluegrid.mat")); auto box = CreateBox(world); box->SetMass(1.0f); box->SetPosition(2.0f, 2.0f, 0.0f); auto player = CreateCylinder(world); player->SetPhysicsMode(PHYSICS_PLAYER); player->SetPosition(0.0f, 5.0f, 0.0f); player->SetMass(10.0f); auto cam_pivot = CreatePivot(world); cam_pivot->SetParent(player); cam_pivot->SetPosition(0.0f, 1.8f, 0.0f); camera->SetParent(cam_pivot); camera->SetPosition(0.0f, 0.0f, -3.0f); camera->SetDebugPhysicsMode(true); bool stage = 0; while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false) { if (window->KeyHit(KEY_F2) == true) { camera->SetWireframe(!camera->GetWireframe()); } if (window->KeyHit(KEY_F3) == true) { camera->SetDebugPhysicsMode(!camera->GetDebugPhysicsMode()); } if (window->KeyHit(KEY_F4) == true) { enable_camera = !enable_camera; } if (enable_camera) { auto _displaySize = window->GetSize(); float cx = Round((float)_displaySize.x / 2.0f); float cy = Round((float)_displaySize.y / 2.0f); auto mpos = Vec3(window->GetMousePosition().x, window->GetMousePosition().y, window->GetMousePosition().z); window->SetMousePosition(cx, cy); mpos = mpos * looksmoothing + mousepos * (1 - looksmoothing); auto dx = (mpos.x - cx) * lookspeed; auto dy = (mpos.y - cy) * lookspeed; auto camrot = cam_pivot->GetRotation(); camrot.x += dy; camrot.y += dx; cam_pivot->SetRotation(camrot); mousepos = mpos; } auto y_angle = cam_pivot->GetRotation().y; auto move = 0.0f, strafe = 0.0f; if (window->KeyDown(KEY_W)) { move = 1.0f; } else if (window->KeyDown(KEY_S)) { move = -1.0f; } if (window->KeyDown(KEY_A)) { strafe = -1.0f; } else if (window->KeyDown(KEY_D)) { strafe = 1.0f; } player->SetInput(y_angle, move, strafe); world->Update(); world->Render(framebuffer); } return 0; }

Yes me too. For me it seems that right clicking in any of the viewports turns it grey and left clicking will reset them to be normal.

Working now except the displacement.