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- /*
- * Copyright (C) 2020 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 "renderer/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();
- }
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