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framework/scene_graph/scripts/animation.h

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+/* Copyright (c) 2020-2021, Arm Limited and Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <functional>
+#include <memory>
+#include <string>
+#include <typeinfo>
+#include <vector>
+
+#include "scene_graph/components/transform.h"
+#include "scene_graph/script.h"
+
+namespace vkb
+{
+namespace sg
+{
+enum AnimationType
+{
+	Linear,
+	Step,
+	CubicSpline
+};
+
+enum AnimationTarget
+{
+	Translation,
+	Rotation,
+	Scale
+};
+
+struct AnimationSampler
+{
+	AnimationType type{Linear};
+
+	std::vector<float> inputs{};
+
+	std::vector<glm::vec4> outputs{};
+};
+
+struct AnimationChannel
+{
+	Node &node;
+
+	AnimationTarget target;
+
+	AnimationSampler sampler;
+};
+
+class Animation : public Script
+{
+  public:
+	Animation(const std::string &name = "");
+
+	Animation(const Animation &);
+
+	virtual void update(float delta_time) override;
+
+	void update_times(float start_time, float end_time);
+
+	void add_channel(Node &node, const AnimationTarget &target, const AnimationSampler &sampler);
+
+  private:
+	std::vector<AnimationChannel> channels;
+
+	float current_time{0.0f};
+
+	float start_time{std::numeric_limits<float>::max()};
+
+	float end_time{std::numeric_limits<float>::min()};
+};
+}        // namespace sg
+}        // namespace vkb