Brush collider is ignored by Pick() when it's a child

[Dreikblack]

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;
}

 

[Dreikblack]

Managed to fix it in the game in Pivot's component Start() method by:

auto entity = GetEntity();
if (entity) {
	entity->SetRotation(entity->GetRotation(true), true);
}

But resetting rotation does not work for this example O_o

[Josh]

Set the parent pivot to have a pick mode:

pivotParent->SetPickMode(PICK_COLLIDER);

Don't use the pick filter, since this will abort when the pivot is encountered:

//auto pick_info = world->Pick(pivot->GetPosition(true), target_pos, 0.25f, true, PickFilter);
auto pick_info = world->Pick(pivot->GetPosition(true), target_pos, 0.25f, true);

This is how the system is meant to work.