#include "camera.hpp"

void Camera::init(float vfov, const v3f& f, const v3f& p) {
	fov = vfov;
	forward = f;
	position = p;
	near = 0.1f;
	far = 1000.0f;
	asp = 1.0f;
}

void Camera::init_shadow(
	const v3f& dir,
	const v3f& mic,
	const v3f& mac
) {
	v3f up(0.0f, 1.0f, 0.0f);
	AABB aabb = { mic, mac };
	init(0.0f, dir, v3f(0.0f));
	view = m4f::lookat(
		dir,
		v3f(0.0f),
		up
	);
	aabb = m4f::transform(view, aabb);
	proj = m4f::orth(
		aabb.min.x,
		aabb.max.x,
		aabb.max.y,
		aabb.min.y,
		aabb.min.z,
		aabb.max.z
	);
}

void Camera::update() {
	v3f up(0.0f, 1.0f, 0.0f);
	view = m4f::lookat(position, position + forward, up);
	proj = m4f::pers(fov, asp, near, far);
}

const m4f& Camera::get_view() const {
	return view;
}

const m4f& Camera::get_proj() const {
	return proj;
}