92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
#pragma once
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#include <GLFW/glfw3.h>
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#include <glm/ext/matrix_transform.hpp>
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <glm/gtx/dual_quaternion.hpp>
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#include "Gedeng/Logger.h"
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#include "Gedeng/Ray.h"
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#include "Input.h"
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#include "Spatial.h"
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namespace Gedeng {
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class Camera : public Spatial {
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public:
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/// Create a camera with a field of view (in degrees), width and height (in any unit) and near
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/// and far distances
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Camera(float fov, float width, float height, float near, float far)
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: projection(glm::perspective(glm::radians(fov), width / height, near, far)) {
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}
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glm::mat4 get_projection() const {
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return projection;
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}
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glm::mat4 get_view() const {
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return glm::inverse(get_matrix());
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}
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Ray get_view_ray() const {
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return Ray(get_translation(), forward());
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}
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private:
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glm::mat4 projection;
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};
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class FPSCamera : public Camera {
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public:
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FPSCamera(float fov, float width, float height, float near, float far)
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: Camera(fov, width, height, near, far), move_speed(glm::vec3(5.0, 5.0, 5.0)), mouse_sensitivity(0.1),
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last_mouse_position(Input::get_mouse_position()), pitch(0.0), yaw(0.0) {
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}
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void update(float delta) {
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if (Input::is_key_down(GLFW_KEY_W)) {
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translate(glm::vec3(0.0, 0.0, -1.0) * move_speed * delta);
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}
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if (Input::is_key_down(GLFW_KEY_S)) {
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translate(-glm::vec3(0.0, 0.0, -1.0) * move_speed * delta);
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}
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if (Input::is_key_down(GLFW_KEY_D)) {
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translate(glm::vec3(1.0, 0.0, 0.0) * move_speed * delta);
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}
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if (Input::is_key_down(GLFW_KEY_A)) {
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translate(-glm::vec3(1.0, 0.0, 0.0) * move_speed * delta);
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}
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if (Input::is_key_down(GLFW_KEY_Q)) {
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translate(glm::vec3(0.0, 1.0, 0.0) * move_speed * delta);
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}
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if (Input::is_key_down(GLFW_KEY_E)) {
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translate(-glm::vec3(0.0, 1.0, 0.0) * move_speed * delta);
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}
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glm::vec2 mouse_difference = Input::get_mouse_position() - last_mouse_position;
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yaw -= mouse_difference.x * mouse_sensitivity;
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pitch -= mouse_difference.y * mouse_sensitivity;
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if (pitch > 80.0f) pitch = 80.0f;
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if (pitch < -80.0f) pitch = -80.0f;
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glm::qua rotation = glm::angleAxis(glm::radians((float)yaw), glm::vec3(0.f, 1.f, 0.f));
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rotation *= glm::angleAxis(glm::radians((float)pitch), glm::vec3(1.f, 0.f, 0.f));
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set_rotation_from_quat(rotation);
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last_mouse_position = Input::get_mouse_position();
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}
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private:
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glm::vec3 move_speed;
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float mouse_sensitivity;
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glm::vec2 last_mouse_position;
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float pitch;
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float yaw;
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};
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} // namespace Gedeng
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