Collisions always detected on Trigger

SpiderPig · May 22

Run this code and use the arrows keys to move the player and move to intercept the box on the left. There's a few bugs here:

After the first collision - "Collison Detected" is still printed to the console even after you move away from the box
position, normal & speed are never above zero

I've only noticed these issues when using COLLISION_TRIGGER as the collision type. So far normal collisions seem fine.

#include "UltraEngine.h"

using namespace UltraEngine;

class MyComponent : public Component {
private:
public:
    virtual void Collide(shared_ptr<Entity> collidedentity, const Vec3& position, const Vec3& normal, const float speed) {
        Print(WString((float)Millisecs() / 1000.0f) + " : Collision Detected : " + WString(position) + " : " + WString(normal) + " : " + WString(speed));
    }
};

int main(int argc, const char* argv[])
{
    //Get the displays
    auto displays = GetDisplays();

    //Create a window
    auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR);

    //Create a framebuffer
    auto framebuffer = CreateFramebuffer(window);

    //Create a world
    auto world = CreateWorld();

    //Create a camera    
    auto camera = CreateCamera(world);
    camera->SetClearColor(0.125);
    camera->SetPosition(0, 2, -6);
    camera->SetDebugPhysicsMode(true);

    //Create light
    auto light = CreateDirectionalLight(world);
    light->SetRotation(35, 35, 0);
    light->SetColor(3);

    auto trigger = CreateBox(world, 4);
    trigger->SetPosition(-4, 3, 0);
    trigger->SetCollisionType(COLLISION_TRIGGER);
    trigger->AddComponent<MyComponent>();

    auto floor = CreateBox(world, 100.0f, 0.1f, 100.0f);

    auto box = CreateCylinder(world, 0.5f, 1.8f);
    box->SetCollisionType(COLLISION_PLAYER);
    box->SetMass(1.0f);
    box->SetPosition(0, 0.05, 0);
    box->SetCollider(CreateCapsuleCollider(0.5f, 1.8f));

    auto joint = CreateKinematicJoint(Vec3(), box);
    joint->SetMaxForce(1000);
    joint->SetMaxTorque(1000);
    
    //Main loop
    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        auto pos = box->GetPosition(true);
        auto speed = 0.25f;

        if (window->KeyDown(KEY_UP)) { pos.z += speed; }
        if (window->KeyDown(KEY_DOWN)) { pos.z -= speed; }
        if (window->KeyDown(KEY_LEFT)) { pos.x -= speed; }
        if (window->KeyDown(KEY_RIGHT)) { pos.x += speed; }

        joint->SetPose(pos, Vec3());

        world->Update();
        world->Render(framebuffer);
    }
    return 0;
}