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Follow-up to previous commits on gizmo grabbers picking (use of centralized static constant for ids and added comments)

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Enrico Turri
2019-03-15 12:07:25 +01:00
parent ef939905b1
commit bc3036d777
3 changed files with 11 additions and 5 deletions
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7
src/slic3r/GUI/GLGizmo.cpp
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@@ -246,18 +246,17 @@ void GLGizmoBase::update(const UpdateData& data, const GLCanvas3D::Selection& se
std::array<float, 3> GLGizmoBase::picking_color_component(unsigned int id) const
{
// Starting value for id to avoid clashing with id used by GLVolumes
static const unsigned int BASE = 254 * 255 * 255;
static const float INV_255 = 1.0f / 255.0f;
id = BASE - id;
id = BASE_ID - id;
if (m_group_id > -1)
id -= m_group_id;
// color components are encoded to match the calculation of volume_id made into GLCanvas3D::_picking_pass()
return std::array<float, 3> { (float)((id >> 0) & 0xff) * INV_255, // red
(float)((id >> 8) & 0xff) * INV_255, // green
(float)((id >> 16)& 0xff) * INV_255}; // blue
(float)((id >> 16) & 0xff) * INV_255 }; // blue
}
void GLGizmoBase::render_grabbers(const BoundingBoxf3& box) const