VoxaNovusCamera.cpp

#include "VoxaNovusCamera.h"
#include "imgui/imgui.h"

namespace dx = DirectX;

DirectX::XMMATRIX Camera::GetMatrix() const noexcept
{
	const auto pos = dx::XMVector3Transform(
		dx::XMVectorSet(0.0f, 0.0f, -r, 0.0f),
		dx::XMMatrixRotationRollPitchYaw(phi, -theta, 0.0f)
	);

	return DirectX::XMMatrixLookAtLH(
		pos,
		dx::XMVectorZero(),
		dx::XMVectorSet(0.0f, 1.0f, 0.0f, 0.0f)) *
		dx::XMMatrixRotationRollPitchYaw(pitch, -yaw, roll);
}

void Camera::SpawnControlWindow() noexcept {
	if (ImGui::Begin("Camera")) {
		ImGui::Text("Position");
		ImGui::SliderFloat("R", &r, 0.1f, 80.0f, "%.1f");
		ImGui::SliderAngle("Theta", &theta, -180.0f, 180.0f);
		ImGui::SliderAngle("Phi", &phi, -89.0f, 89.0f);
		ImGui::Text("Orientation");
		ImGui::SliderAngle("Roll", &roll, -180.0f, 180.0f);
		ImGui::SliderAngle("Pitch", &pitch, -180.0f, 180.0f);
		ImGui::SliderAngle("Yaw", &yaw, -180.0f, 180.0f);
		if (ImGui::Button("Reset")) {
			Reset();
		}
	}
	ImGui::End();
}

void Camera::Reset() noexcept {
	r = 20.0f;
	theta = 0.0f;
	phi = 0.0f;
	pitch = 0.0f;
	yaw = 0.0f;
	roll = 0.0f;
}