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#include "SimulationState.h"
#include "Rendering/Renderer.h"
#include "Core/Application.h"
#include "Core/Window.h"
#include "Core/Event.h"
#include <imgui.h>
#include <GLFW/glfw3.h>
namespace Donut
{
void SimulationState::OnEnter()
{
DONUT_INFO("Entering Simulation State");
m_Initialized = true;
}
void SimulationState::OnExit()
{
DONUT_INFO("Exiting Simulation State");
}
void SimulationState::OnUpdate(float deltaTime)
{
m_Engine.UpdateWindowDimensions();
m_Engine.UpdatePhysics(deltaTime);
if (m_Engine.GetCamera().IsDragging())
{
GLFWwindow* window = static_cast<GLFWwindow*>(Application::Get().GetWindow().GetNativeWindow());
double xpos, ypos;
glfwGetCursorPos(window, &xpos, &ypos);
m_Engine.GetCamera().ProcessOrbitalMouseMove(xpos, ypos);
}
}
void SimulationState::OnRender()
{
if (!m_Initialized) return;
RenderCommand::SetClearColor(glm::vec4(0.0f, 0.0f, 0.0f, 1.0f));
RenderCommand::Clear();
m_Engine.GenerateGrid(m_Engine.GetObjects());
glm::mat4 view = glm::lookAt(m_Engine.GetCamera().GetOrbitalPosition(), m_Engine.GetCamera().GetTarget(), glm::vec3(0,1,0));
glm::mat4 proj = glm::perspective(glm::radians(60.0f), float(m_Engine.GetWidth())/m_Engine.GetHeight(), 1e9f, 1e14f);
glm::mat4 viewProj = proj * view;
m_Engine.DrawGrid(viewProj);
RenderCommand::SetViewport(0, 0, m_Engine.GetWidth(), m_Engine.GetHeight());
m_Engine.DispatchCompute(m_Engine.GetCamera());
m_Engine.DrawFullScreenQuad();
}
void SimulationState::OnEvent(Event& event)
{
if (!m_Initialized) return;
if (event.GetEventType() == EventType::MouseButtonPressed)
{
MouseButtonPressedEvent& e = (MouseButtonPressedEvent&)event;
int button = e.GetMouseButton();
m_Engine.GetCamera().ProcessOrbitalMouseButton(button, GLFW_PRESS, 0);
}
else if (event.GetEventType() == EventType::MouseButtonReleased)
{
MouseButtonReleasedEvent& e = (MouseButtonReleasedEvent&)event;
int button = e.GetMouseButton();
m_Engine.GetCamera().ProcessOrbitalMouseButton(button, GLFW_RELEASE, 0);
}
if (event.GetEventType() == EventType::MouseScrolled)
{
MouseScrolledEvent& e = (MouseScrolledEvent&)event;
m_Engine.GetCamera().ProcessOrbitalScroll(e.GetXOffset(), e.GetYOffset());
}
if (event.GetEventType() == EventType::KeyPressed)
{
KeyPressedEvent& e = (KeyPressedEvent&)event;
if (e.GetKeyCode() == GLFW_KEY_G)
{
m_Engine.SetGravity(!m_Engine.GetGravity());
DONUT_INFO("Gravity turned {}", m_Engine.GetGravity() ? "ON" : "OFF");
}
}
}
void SimulationState::OnImUIRender()
{
ImGui::Begin("Simulation Controls");
ImGui::Text("Black Hole Simulation");
if (ImGui::Button("Back to Config"))
Application::Get().GetStateManager().SwitchToState("Config");
ImGui::Separator();
ImGui::Text("Simulation Info:");
ImGui::Text("FPS: %.1f", ImGui::GetIO().Framerate);
ImGui::Text("Frame Time: %.3f ms", 1000.0f / ImGui::GetIO().Framerate);
ImGui::Text("Resolution: %dx%d", m_Engine.GetWidth(), m_Engine.GetHeight());
ImGui::Text("Compute Resolution: %dx%d", m_Engine.GetComputeWidth(), m_Engine.GetComputeHeight());
ImGui::Text("Objects: %zu", m_Engine.GetObjects().size());
ImGui::Separator();
ImGui::Text("Controls:");
ImGui::Text("Left Mouse: Orbit camera");
ImGui::Text("Scroll: Zoom in/out");
ImGui::Text("G: Toggle gravity");
ImGui::Text("Right Mouse: Enable gravity (hold)");
ImGui::Separator();
ImGui::Text("Physics:");
bool gravity = m_Engine.GetGravity();
if (ImGui::Checkbox("Gravity Enabled", &gravity))
m_Engine.SetGravity(gravity);
ImGui::Text("Camera:");
ImGui::Text("Position: (%.2e, %.2e, %.2e)",
m_Engine.GetCamera().GetOrbitalPosition().x,
m_Engine.GetCamera().GetOrbitalPosition().y,
m_Engine.GetCamera().GetOrbitalPosition().z);
ImGui::Text("Radius: %.2e", m_Engine.GetCamera().GetRadius());
ImGui::Text("Azimuth: %.2f", m_Engine.GetCamera().GetAzimuth());
ImGui::Text("Elevation: %.2f", m_Engine.GetCamera().GetElevation());
ImGui::End();
}
};
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