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In this tutorial will be used Tile, Camera:Pick() and Entity:GetDistance FPSPlayer component of FPS Template will be used as a base to modify Algorithm: 1. Create a Tile with text prompt 2. In Update function of component check if player look at usable object at close distance 3. if the check is passed then show prompt at center of screen Result will looks like that: Let's implement this Algorithm: 1. Add new component variable, for example after: FPSPlayer.movement = Vec3(0) New code line: FPSPlayer.usePromtTile = nil Now in FPSPlayer:Load() function after: if not self.camera then self.camera = CreateCamera(world) self.camera:Listen() Add: local font = LoadFont("Fonts/arial.ttf") self.usePromtTile = CreateTile(self.camera, font, "Press E", 20, TEXT_CENTER, 1.5) This overload used (more short one for text currently not available when tutorial is written): CreateTile(Camera camera, Font font, string text, number fontsize, number alignment, number linespacing) Tile is something like mini GUI widget which can be used to show text or rectangles without creating Interface. 2 and 3. Inside of FPSPlayer:Update() in "if window then" scope before its end (after 392th line) add: --to decide later if we want to show or hide prompt tile local doHideTile = true --cx and cy are screen center coordinates which were created above local pickInfo = self.camera:Pick(framebuffer, cx, cy, 0, true) if pickInfo.success and pickInfo.entity and pickInfo.entity:GetDistance(self.entity) < 2.0 then --iterate all components of picked entity for _, component in ipairs(pickInfo.entity.components) do --find out if component of picked entity have Use function and it's enabled if component.Use and type(component.Use) == "function" and component:GetEnabled() then --move tile to center of screen self.usePromtTile:SetPosition(cx, cy) doHideTile = false --stop iterating once we found usable object break end end end self.usePromtTile:SetHidden(doHideTile) Result file: FPSPlayer.lua

If brush was SetParented to a pivot World::Pick() starts ignoring it. How it should be: How it is: #include "UltraEngine.h" using namespace UltraEngine; bool PickFilter(std::shared_ptr<Entity> entity, std::shared_ptr<Object> extra) { if (entity->GetCollider() == nullptr) { return false; } return 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, 2, -3); camera->SetRotation(25, 0, 0); camera->SetDebugPhysicsMode(true); auto light = CreateDirectionalLight(world); light->SetRotation(35, 45, 0); light->SetColor(1); auto floor = CreatePlane(world, 100, 100); floor->Move(0, -1, 0); auto b1 = CreateBox(world, 2.0f); b1->SetPosition(-3.0f, 0.0f, 0.0f); b1->SetColor(1, 0, 0); auto pivotParent = CreatePivot(world);//added a parent here b1->SetParent(pivotParent); auto b2 = CreateBox(world, 2.0f); b2->SetColor(0.0f, 0.0f, 1.0f); b2->SetPosition(3.0f, 0.0f, 2.0f); b2->SetRotation(0.0f, 45.0f, 0.0f); auto pivot = CreatePivot(world); auto rod_scale = 5.0f; auto rod = CreateCylinder(world, 0.05f); rod->SetCollider(nullptr); rod->SetParent(pivot); rod->SetRotation(90.0f, 0.0f, 0.0f); rod->SetPosition(0.0f, 0.0f, rod_scale / 2.0f); rod->SetScale(1.0f, rod_scale, 1.0f); auto sphere = CreateSphere(world, 0.25f); sphere->SetCollider(nullptr); sphere->SetParent(pivot); sphere->SetColor(0, 1, 0); sphere->SetPosition(0.0f, 0.0f, rod_scale); auto spin_speed = 0.5f; while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false) { pivot->Turn(0.0f, spin_speed, 0.0f); auto target_pos = Vec3(0.0f, 0.0f, rod_scale); target_pos = TransformPoint(target_pos, Mat4(), pivot->GetMatrix(true).Inverse()); // Perform a ray cast auto pick_info = world->Pick(pivot->GetPosition(true), target_pos, 0.25f, true, PickFilter); if (pick_info.success) { sphere->SetPosition(pick_info.position, true); } else { sphere->SetPosition(target_pos, true); } world->Update(); world->Render(framebuffer); } return 0; }

if window:MouseHit(1) then local pickinfo= PickInfo() local p1 = Window:GetCurrent():GetMousePosition() --local box = Model:Box() if (self.camera:Pick(p1.x,p1.y,pickinfo,0.5,true)) then if pickinfo.entity then if pickinfo.entity:GetKeyValue("Button")~="" then --box:SetScale(0.2,0.2,0.2) --box:SetPosition(pickinfo.entity:GetPosition(true),true) System:Print(tostring(pickinfo.entity:GetKeyValue("Button"))) end end end end the above is the camera pick , I cant find anything . The camera pick should Print the Key value of the box in the script below. However, it prints nothing and I dont know why. Script.localKeyValue = -1--string " Key Value Integer" function Script:Start() self.entity:SetKeyValue("Button",self.localKeyValue) end

I have a third person character controller, the character has pickmode(0). I can walk around and have obstacles between the player and the cam , but nothing happens? the self.pivot is a pivot which is at the center of the character (the camera focus). updateworld: if self.entity.world:Pick(self.pivot:GetPosition(),self.camera:GetPosition(),pickinfo,0,true) then local model2 = Model:Box() model2:SetPickMode(0) model2:SetPosition(pickinfo.position) model2:SetColor(0,1,0) System:Print(">> PICKED") --self.camera:SetPosition(pickinfo.position) end

Forgive me if this is a silly question, but my previous experience with collision normals is as follows: collision on X should return Vec3(1,0,0) collision on -X should return Vec3(-1,0,0) collision on Y should return Vec3(0,1,0) collision on -Y should return Vec3(0,-1,0) collision on Z should return Vec3(0,0,1) collision on -Z should return Vec3(0,0,-1) Leadwerks pickinfo.normal returns a fraction depending on where on a face the collision occurs. Is pickinfo.face the "normal" function I'm used to, and maybe pickinfo.normal is describing the hit point? If this is the case, how do you use pickinfo.face, I couldn't find much documentation on it? Thanks!

Hi I went through the Object script tutorials and I've gotten that crate model to rotate. I've also tested out the Pick example for the Camera class. Now my question how do I make a Camera object that I placed in the editor to do a "Pick" on the crate model then have that model rotate (and maybe even play a sound)?

I'm trying to translate my raycasting experience in Unity and Blender GE to Leadwerks, but I'm having a hard time connecting the dots. My test scene includes one cube on the ground, and another cube next to the first (on X axis) and raised above the ground and above the height of the ground cube so that when the game starts, the raised cube falls next to the ground cube. I have a lua script attached to the ground cube and I'm trying to cast a ray from the ground cubes position to a position farther down the x axis so that the raised cube will intersect when it falls. This is my code in the UpdateWorld function. I get an blank error window. I'm very inexperienced with Leadwerks, so I may be going about it all wrong, but this is what I've gathered from the docs. Thanks for any help you can provide. function Script:UpdateWorld() self.position = self.entity:GetPosition() self.right = Vec3(self.position.x + self.right.x, self.position.y, self.position.z); local pickInfo = PickInfo() local clear = true local world = World:GetCurrent() local context = Context:GetCurrent() local pos = self.camera:Project(Vec3(self.position)) local pRight = self.camera:Project(Vec3(self.right)) context:DrawLine(pos.x, pos.y, pRight.x, pRight.y) if (world:Pick(self.position, self.right, pickinfo, 0.0, true)) then clear= false end end