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#include "Camera3D.hpp"
Camera3D::Camera3D(glm::vec3 position, glm::vec3 up, GLfloat yaw, GLfloat pitch) : Front(glm::vec3(0.0f, 0.0f, -1.0f)),
MovementSpeed(SPEED),
MouseSensitivity(SENSITIVTY),
Zoom(ZOOM) {
this->Position = position;
this->WorldUp = up;
this->Yaw = yaw;
this->Pitch = pitch;
this->updateCameraVectors();
}
Camera3D::Camera3D(GLfloat posX, GLfloat posY, GLfloat posZ, GLfloat upX, GLfloat upY, GLfloat upZ, GLfloat yaw,
GLfloat pitch) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVTY),
Zoom(ZOOM) {
this->Position = glm::vec3(posX, posY, posZ);
this->WorldUp = glm::vec3(upX, upY, upZ);
this->Yaw = yaw;
this->Pitch = pitch;
this->updateCameraVectors();
}
glm::mat4 Camera3D::GetViewMatrix() {
return glm::lookAt(this->Position, this->Position + this->Front, this->Up);
}
void Camera3D::ProcessKeyboard(Camera_Movement direction, GLfloat deltaTime) {
GLfloat velocity = this->MovementSpeed * deltaTime;
if (direction == FORWARD)
this->Position += this->Front * velocity;
if (direction == BACKWARD)
this->Position -= this->Front * velocity;
if (direction == LEFT)
this->Position -= this->Right * velocity;
if (direction == RIGHT)
this->Position += this->Right * velocity;
}
void Camera3D::ProcessMouseMovement(GLfloat xoffset, GLfloat yoffset, GLboolean constrainPitch) {
xoffset *= this->MouseSensitivity;
yoffset *= this->MouseSensitivity;
this->Yaw += xoffset;
this->Pitch += yoffset;
// Make sure that when pitch is out of bounds, screen doesn't get flipped
if (constrainPitch) {
if (this->Pitch > 89.0f)
this->Pitch = 89.0f;
if (this->Pitch < -89.0f)
this->Pitch = -89.0f;
}
// Update Front, Right and Up Vectors using the updated Eular angles
this->updateCameraVectors();
}
void Camera3D::ProcessMouseScroll(GLfloat yoffset) {
if (this->Zoom >= 1.0f && this->Zoom <= 45.0f)
this->Zoom -= yoffset/5.0f;
if (this->Zoom <= 1.0f)
this->Zoom = 1.0f;
if (this->Zoom >= 45.0f)
this->Zoom = 45.0f;
}
void Camera3D::updateCameraVectors() {
// Calculate the new Front vector
glm::vec3 front;
front.x = cos(glm::radians(this->Yaw)) * cos(glm::radians(this->Pitch));
front.y = sin(glm::radians(this->Pitch));
front.z = sin(glm::radians(this->Yaw)) * cos(glm::radians(this->Pitch));
this->Front = glm::normalize(front);
// Also re-calculate the Right and Up vector
this->Right = glm::normalize(glm::cross(this->Front,
this->WorldUp)); // Normalize the vectors, because their length gets closer to 0 the more you look up or down which results in slower movement.
this->Up = glm::normalize(glm::cross(this->Right, this->Front));
}
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