This function performs a pick from camera screen coordinates. The current buffer or context will be used for picking operations.

Syntax

• bool Pick(int x, int y, PickInfo& pick, float radius=0.0, bool closest=false, int collisiontype=0)

Parameters

• x: the x component of the screen coordinate to pick.
• y: the y component of the screen coordinate to pick.
• pickinfo: a PickInfo structure to hold information.
• radius: a radius can be specified to perform a swept sphere collision test.
• closest: if set to true the closest intersection will be found, otherwise the routine will return as soon as one object is picked.
• collisiontype: if specified, the entity collision type will be tested against this, and only colliding entities will be tested.

Returns

Returns true if anything was picked, otherwise false is returned.

Example

#include "Leadwerks.h"

using namespace Leadwerks;

int main(int argc, const char *argv[])
{
    Leadwerks::Window* window = Leadwerks::Window::Create();
    Context* context = Context::Create(window);
    World* world = World::Create();
    Camera* camera = Camera::Create();
    camera->Move(0, 0, -8);
    Light* light = DirectionalLight::Create();
    light->SetRotation(35, 35, 0);
    camera->SetProjectionMode(2);
    camera->SetZoom(50);

    float pickradius = 0.5;

    //Create a model
    float spherescale = 3.6;
    Model* model = Model::Sphere();
    model->SetPickMode(Entity::SpherePick);
    model->SetPickRadius(spherescale / 2.0);
    model->SetScale(model->GetPickRadius()*2.0);

    //Create a sphere to indicate where the pick hits
    Entity* picksphere = Model::Sphere();
    picksphere->SetColor(1.0, 0.0, 0.0);
    picksphere->SetPickMode(0);
    picksphere->SetScale(pickradius*2.0);
    picksphere->Hide();
    
    while (true)
    {
        if (window->Closed() || window->KeyDown(Key::Escape)) break;

        if (window->MouseDown(1))
        {
            picksphere->Hide();
            PickInfo pickinfo;
            Vec3 p = window->GetMousePosition();
            if (camera->Pick(p.x, p.y, pickinfo, pickradius, true))
            {
                picksphere->Show();
                picksphere->SetPosition(pickinfo.position);
            }
        }

        Leadwerks::Leadwerks::Time::Update();
        world->Update();
        world->Render();
        context->Sync();
    }
}