Method OnMouseClick

GTE/Samples/SceneGraphs/Castle/CastleWindow3.cpp:142–176

}

bool CastleWindow3::OnMouseClick(MouseButton button, MouseState state, int32_t x, int32_t y, uint32_t)
{
    if (button == MOUSE_LEFT && state == MOUSE_DOWN)
    {
        // Do a picking operation.  Reflect y to obtain right-handed window
        // coordinates.
        y = mYSize - 1 - y;
        int32_t viewX, viewY, viewW, viewH;
        mEngine->GetViewport(viewX, viewY, viewW, viewH);
        Vector4<float> origin, direction;
        if (mCamera->GetPickLine(viewX, viewY, viewW, viewH, x, y, origin, direction))
        {
            // Use a ray for picking.
            float tmin = 0.0f;
            float constexpr tmax = std::numeric_limits<float>::max();

            // We care only about intersecting a mesh, so request model-space
            // coordinates to avoid computing world-space information.
            mPicker(mScene, origin, direction, tmin, tmax);
            if (mPicker.records.size() > 0)
            {
                // Display the selected object's name.
                PickRecord const& record = mPicker.GetClosestNonnegative();
                mPickMessage = record.visual->name;
            }
            else
            {
                mPickMessage = "";
            }
        }
        return true;
    }

    return false;
}

bool CastleWindow3::SetEnvironment()
{