#include <td/render/Camera.h>

#include <cmath>

namespace td {
namespace render {

void Camera::UpdatePerspective(float a_AspectRatio) {
	m_ProjectionMatrix = maths::Perspective(80.0f / 180.0f * PI, a_AspectRatio, 0.1f, 160.0f);
	m_InvProjectionMatrix = maths::Inverse(m_ProjectionMatrix);
	OnPerspectiveChange();
}

void Camera::SetCamPos(const Vec3f& a_NewPos) {
	Vec3f front = {
		std::cos(m_Yaw) * std::cos(m_Pitch),
		std::sin(m_Pitch),
		std::sin(m_Yaw) * std::cos(m_Pitch)
	};

	m_CamPos = a_NewPos;
	m_ViewMatrix = maths::Look(m_CamPos, front, { 0, 1, 0 });
	m_InvViewMatrix = maths::Transpose(maths::Inverse(m_ViewMatrix));  // why transpose ? I don't know
	OnViewChange();
}

}  // namespace render
}  // namespace td