99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
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//
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// Created by slinky on 5/3/26.
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//
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#include "FreeCamera.h"
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#include "glm/ext/matrix_transform.hpp"
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#include "glm/ext/matrix_clip_space.hpp"
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FreeCamera::FreeCamera(const glm::vec3 &pos, float pitch, float yaw, float aspectRatio) : _position(pos), _yaw(yaw), _pitch(pitch), _aspectRatio(aspectRatio) {
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update_camera_vectors();
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update_view();
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update_projection();
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}
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const glm::mat4& FreeCamera::view() const {
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return _view;
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}
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const glm::mat4& FreeCamera::projection() const {
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return _projection;
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}
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const glm::vec3& FreeCamera::position() const {
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return _position;
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}
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void FreeCamera::rotate_pitch(float offset) {
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_pitch += offset;
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if (_pitch < MIN_PITCH) {
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_pitch = MIN_PITCH;
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}
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if (_pitch > MAX_PITCH) {
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_pitch = MAX_PITCH;
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}
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update_camera_vectors();
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update_view();
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}
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void FreeCamera::rotate_yaw(float offset) {
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_yaw += offset;
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update_camera_vectors();
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update_view();
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}
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void FreeCamera::move(CAMERA_MOVEMENT direction, float offset) {
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glm::vec3 finalDirection = {};
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switch (direction) {
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case FORWARD:
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finalDirection = front;
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break;
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case BACKWARD:
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finalDirection = -front;
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break;
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case LEFT:
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finalDirection = -right;
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break;
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case RIGHT:
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finalDirection = right;
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break;
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case UP:
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finalDirection = up;
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break;
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case DOWN:
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finalDirection = -up;
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break;
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}
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finalDirection = glm::normalize(finalDirection);
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_position += finalDirection * offset;
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_view = glm::lookAt(_position, _position + front, up);
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}
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void FreeCamera::update_aspect_ratio(float aspectRatio) {
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_aspectRatio = aspectRatio;
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_projection = glm::perspective(glm::radians(75.f), _aspectRatio, 0.1f, 100.0f);
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}
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void FreeCamera::update_camera_vectors() {
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front = {};
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front.x = cos(glm::radians(_yaw)) * cos(glm::radians(_pitch));
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front.y = sin(glm::radians(_pitch));
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front.z = sin(glm::radians(_yaw)) * cos(glm::radians(_pitch));
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right = glm::normalize(glm::cross(front, WORLD_UP));
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up = glm::normalize(glm::cross(right, front));
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}
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void FreeCamera::update_projection() {
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_projection = glm::perspective(glm::radians(75.f), _aspectRatio, 0.1f, 100.0f);
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}
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void FreeCamera::update_view() {
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_view = glm::lookAt(_position, _position + front, up);
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}
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