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framework/camera.h

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+/* Copyright (c) 2019-2024, Sascha Willems
+ *
+ * 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 "common/error.h"
+
+#include "common/glm_common.h"
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/quaternion.hpp>
+
+namespace vkb
+{
+enum CameraType
+{
+	LookAt,
+	FirstPerson
+};
+
+class Camera
+{
+  public:
+	void update(float deltaTime);
+
+	// Update camera passing separate axis data (gamepad)
+	// Returns true if view or position has been changed
+	bool update_gamepad(glm::vec2 axis_left, glm::vec2 axis_right, float delta_time);
+
+	CameraType type = CameraType::LookAt;
+
+	glm::vec3 rotation = glm::vec3();
+	glm::vec3 position = glm::vec3();
+
+	float rotation_speed    = 1.0f;
+	float translation_speed = 1.0f;
+
+	bool updated = false;
+
+	struct
+	{
+		glm::mat4 perspective;
+		glm::mat4 view;
+	} matrices;
+
+	struct
+	{
+		bool left  = false;
+		bool right = false;
+		bool up    = false;
+		bool down  = false;
+	} keys;
+
+	bool moving();
+
+	float get_near_clip();
+
+	float get_far_clip();
+
+	void set_perspective(float fov, float aspect, float znear, float zfar);
+
+	void update_aspect_ratio(float aspect);
+
+	void set_position(const glm::vec3 &position);
+
+	void set_rotation(const glm::vec3 &rotation);
+
+	void rotate(const glm::vec3 &delta);
+
+	void set_translation(const glm::vec3 &translation);
+
+	void translate(const glm::vec3 &delta);
+
+  private:
+	float fov;
+	float znear, zfar;
+
+	void update_view_matrix();
+};
+}        // namespace vkb