💿🐜 Antkeeper source code https://antkeeper.com
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/*
* Copyright (C) 2021 Christopher J. Howard
*
* This file is part of Antkeeper source code.
*
* Antkeeper source code is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Antkeeper source code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
*/
#include "screen-transition.hpp"
#include "render/material-flags.hpp"
#include <functional>
screen_transition::screen_transition()
{
// Setup material
material.set_flags(MATERIAL_FLAG_TRANSLUCENT | MATERIAL_FLAG_X_RAY);
progress = material.add_property<float>("progress");
// Setup billboard
billboard.set_material(&material);
billboard.set_active(false);
// Add single channel to transition animation
channel = animation.add_channel(0);
// Setup animation start callback to show transition billboard
animation.set_start_callback
(
std::bind(&scene::object_base::set_active, &billboard, true)
);
// Setup animation end callback to hide transition billboard
animation.set_end_callback
(
std::bind(&scene::object_base::set_active, &billboard, false)
);
// Setup animation frame callback to update transition progress material property
animation.set_frame_callback
(
[this](int channel, float progress)
{
this->progress->set_value(progress);
}
);
// Setup animation frame callback to update transition progress material property
animation.set_frame_callback
(
[this](int channel, float progress)
{
this->progress->set_value(progress);
}
);
}
void screen_transition::transition(float duration, bool reverse, ::animation<float>::interpolator_type interpolator)
{
float initial_state = (reverse) ? 1.0f : 0.0f;
float final_state = (reverse) ? 0.0f : 1.0f;
// Build transition animation
channel->remove_keyframes();
channel->insert_keyframe({0.0f, initial_state});
channel->insert_keyframe({duration, final_state});
// Set transition animation interpolator
animation.set_interpolator(interpolator);
// Update tweens
progress->set_value(initial_state);
material.update_tweens();
// Reset and play transition animation
animation.stop();
animation.play();
}