Camera.cpp

#include "Camera.h"


void Camera::updateCameraVectors()
{
	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);
	this->Right = glm::normalize(glm::cross(this->Front, this->WorldUp));
	this->Up = glm::normalize(glm::cross(this->Right, this->Front));
}

Camera::Camera(glm::vec3 position, glm::vec3 up, GLfloat yaw, GLfloat pitch) :Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(MOUSESPEED), MouseSensitivity(SENSITIVTY), Zoom(ZOOM)
{
	this->Position = position;
	this->WorldUp = up;
	this->Yaw = yaw;
	this->Pitch = pitch;
	this->updateCameraVectors();
}

Camera::Camera(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(MOUSESPEED), 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 Camera::GetViewMatrix()
{
	return glm::lookAt(this->Position, this->Position + this->Front, this->Up);
}

void Camera::ProcessKeyboard(Camera_movement direction, GLfloat deltaTime)
{
	GLfloat velocity = this->MovementSpeed*deltaTime;
	if (direction == FORWARD)
		//this->Position += this->Front*velocity;
		this->Position += glm::vec3(this->Front.x, 0, this->Front.z)*velocity;
	if (direction == BACKWARD)
		//this->Position -= this->Front*velocity;
		this->Position -= glm::vec3(this->Front.x, 0, this->Front.z)*velocity;
	if (direction == LEFT)
		this->Position -= glm::vec3(this->Right.x, 0, this->Right.z)*velocity;
	//this->Position -= this->Right*velocity;
	if (direction == RIGHT)
		this->Position += glm::vec3(this->Right.x, 0, this->Right.z)*velocity;
	//this->Position += this->Right*velocity;
	if (direction == UP)
		this->Position.y += velocity;
	if (direction == DOWN)
		this->Position.y -= velocity;
}

void Camera::ProcessMouseMovement(GLfloat xoffset, GLfloat yoffset, GLboolean constrainPitch)
{
	xoffset *= this->MouseSensitivity;
	yoffset *= this->MouseSensitivity;
	this->Yaw += xoffset;
	this->Pitch += yoffset;

	if (constrainPitch)
	{
		if (this->Pitch > 89.0f)
			this->Pitch = 89.0f;
		if (this->Pitch < -89.0f)
			this->Pitch = -89.0f;
	}
	this->updateCameraVectors();
}

void Camera::ProcessMouseScroll(GLfloat yoffset)
{
	if (this->Zoom >= 1.0f && this->Zoom <= 45.0f)
		this->Zoom -= yoffset;
	if (this->Zoom <= 1.0f)
		this->Zoom = 1.0f;
	if (this->Zoom >= 45.0f)
		this->Zoom = 45.0f;
}