bool rotate_manipulator::handle_mouse_down(visionaray::mouse_event const& event)
{
auto bdisc = flip( bounding_disc(), camera_.get_viewport() );
if (bdisc.contains(event.get_pos()) && event.get_buttons() & buttons_)
{
dragging_ = true;
auto brect = flip( bounding_rect(), camera_.get_viewport() );
ball_.down_pos = ball_.project(
event.get_pos().x,
event.get_pos().y,
brect
);
ball_.down_rotation = ball_.rotation;
down_pos_ = event.get_pos();
// selected_ = select_from_mouse_pointer(event);
return true;
}
else
{
return false;
}
}
void pan_manipulator::handle_mouse_move(visionaray::mouse_event const& event)
{
if (!dragging_)
{
return;
}
if (event.get_buttons() & buttons_)
{
auto w = camera_.get_viewport().w;
auto h = camera_.get_viewport().h;
auto dx = static_cast<float>(last_pos_.x - event.get_pos().x) / w;
auto dy = -static_cast<float>(last_pos_.y - event.get_pos().y) / h;
auto s = 2.0f * camera_.distance();
auto zaxis = normalize( camera_.eye() - camera_.center() );
auto yaxis = camera_.up();
auto xaxis = cross( yaxis, zaxis );
vec3 d = (dx * s) * xaxis + (dy * s) * yaxis;
camera_.look_at( camera_.eye() + d, camera_.center() + d, camera_.up() );
last_pos_ = event.get_pos();
}
camera_manipulator::handle_mouse_move(event);
}
int rotate_manipulator::select_from_mouse_pointer(visionaray::mouse_event const& event)
{
auto scaling = get_scaling(model_matrix_);
auto radius = length((scaling * vec4(size_, 1.0f)).xyz()) / 2.0f;
vec2i pos(
event.get_pos().x,
camera_.get_viewport().h - 1 - event.get_pos().y
);
int result = -1;
for (int i = 0; i < 3; ++i)
{
auto modelview = camera_.get_view_matrix() * model_matrix_ * inverse(scaling);
circle::for_each_line(
[&](float x1, float y1, float x2, float y2)
{
auto v1 = rotate( vec3(0.0f, x1, y1), i );
auto v2 = rotate( vec3(0.0f, x2, y2), i );
vec3 win1;
project(win1, v1, modelview, camera_.get_proj_matrix(), camera_.get_viewport());
vec3 win2;
project(win2, v2, modelview, camera_.get_proj_matrix(), camera_.get_viewport());
auto minx = min(win1.x, win2.x);
auto maxx = max(win1.x, win2.x);
auto miny = min(win1.y, win2.y);
auto maxy = max(win1.y, win2.y);
minx -= 2;
miny -= 2;
maxx += 2;
maxy += 2;
recti bounds(
static_cast<int>(floor(minx)),
static_cast<int>(floor(miny)),
static_cast<int>(ceil(abs(maxx - minx))),
static_cast<int>(ceil(abs(maxy - miny)))
);
if (bounds.contains(pos))
{
result = i;
return;
}
},
radius * ball_.radius
);
}
return result;
}
void arcball_manipulator::handle_mouse_move(visionaray::mouse_event const& event)
{
bool buttons = event.get_buttons() & buttons_;
bool modifiers = (modifiers_ == keyboard::NoKey && down_modifiers_ == keyboard::NoKey)
|| down_modifiers_ & modifiers_;
if (dragging_ && buttons && modifiers)
{
// rotation
vec3 curr_pos = ball_.project(
event.get_pos().x,
event.get_pos().y,
camera_.get_viewport()
);
ball_.rotation = quat::rotation(ball_.down_pos, curr_pos) * ball_.down_rotation;
if (true)
{
// view transform
mat4 rotation_matrix = rotation(conjugate(ball_.rotation));
vec4 eye4(0, 0, camera_.distance(), 1.0);
eye4 = rotation_matrix * eye4;
vec3 eye = vec3(eye4[0], eye4[1], eye4[2]);
eye += camera_.center();
vec4 up4 = rotation_matrix(1);
vec3 up(up4[0], up4[1], up4[2]);
camera_.look_at(eye, camera_.center(), up);
}
else
{
// model transform
mat4 model = rotation(ball_.rotation);
VSNRAY_UNUSED(model);
//camera_.set_model_matrix(model);
}
}
camera_manipulator::handle_mouse_move(event);
}
bool rotate_manipulator::handle_mouse_move(visionaray::mouse_event const& event)
{
auto bdisc = flip( bounding_disc(), camera_.get_viewport() );
mouse_over_ = bdisc.contains(event.get_pos());
if (dragging_ && event.get_buttons() & buttons_)
{
auto brect = flip( bounding_rect(), camera_.get_viewport() );
vec3 curr_pos = ball_.project(
event.get_pos().x,
event.get_pos().y,
brect
);
auto last_vsr = rotation(ball_.rotation);
ball_.rotation = quat::rotation(ball_.down_pos, curr_pos) * ball_.down_rotation;
auto vsr = rotation(ball_.rotation);
auto trans = model_matrix_(3);
model_matrix_.col3 = vec4(0.0f, 0.0f, 0.0f, 1.0f);
auto vm = camera_.get_view_matrix();
vm.col3 = vec4(0.0f, 0.0f, 0.0f, 1.0f);
model_matrix_ = inverse(vm) * vsr * inverse(last_vsr) * vm * model_matrix_;
model_matrix_.col3 = trans;
return true;
}
else
{
hovered_ = select_from_mouse_pointer(event);
return false;
}
}
void pan_manipulator::handle_mouse_down(visionaray::mouse_event const& event)
{
if (dragging_)
{
return;
}
dragging_ = true;
// TODO: do this in base?
last_pos_ = event.get_pos();
camera_manipulator::handle_mouse_down(event);
}
void arcball_manipulator::handle_mouse_down(visionaray::mouse_event const& event)
{
bool buttons = event.get_buttons() & buttons_;
bool modifiers = (modifiers_ == keyboard::NoKey && event.get_modifiers() == keyboard::NoKey)
|| event.get_modifiers() & modifiers_;
if (!dragging_ && buttons && modifiers)
{
dragging_ = true;
ball_.down_pos = ball_.project(
event.get_pos().x,
event.get_pos().y,
camera_.get_viewport()
);
ball_.down_rotation = ball_.rotation;
down_modifiers_ = event.get_modifiers();
}
camera_manipulator::handle_mouse_down(event);
}