cs381/as6/Components.hpp

#pragma once

#include "Entity.hpp"

#include "raylib.h"

#include <algorithm>
#include <cmath>

struct TransformComponent : public Component {
    float x = 0.0f;
    float y = 0.0f;
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct PhysicsComponent : public Component {
    float vx = 0.0f;
    float vy = 0.0f;
    float speedCap = 400.0f;
    void Setup() override {}
    void Update(float dt) override {
        auto transform = entity->GetComponent<TransformComponent>();
        if (!transform) {
            return;
        }

        const float speed = std::sqrt(vx * vx + vy * vy);
        if (speed > speedCap && speed > 0.0f) {
            const float scale = speedCap / speed;
            vx *= scale;
            vy *= scale;
        }

        transform->get().x += vx * dt;
        transform->get().y += vy * dt;
    }
    void Cleanup() override {}
};

struct GravityWellComponent : public Component {
    float mass = 150000.0f;
    float minDist = 30.0f;
    bool active = false;
    float followLerp = 12.0f;
    void Setup() override {}
    void Update(float dt) override {
        auto transform = entity->GetComponent<TransformComponent>();
        if (!transform) {
            return;
        }

        // TODO: use buffered input
        active = IsMouseButtonDown(MOUSE_BUTTON_LEFT);

        const Vector2 mouse = GetMousePosition();
        auto &t = transform->get();
        const float blend = std::clamp(followLerp * dt, 0.0f, 1.0f);
        t.x += (mouse.x - t.x) * blend;
        t.y += (mouse.y - t.y) * blend;
    }
    void Cleanup() override {}
};

struct GravityReceiverComponent : public Component {
    Entity *well = nullptr;
    bool inVoid = false;
    void Setup() override {}
    void Update(float dt) override {
        (void)inVoid;

        if (!well) {
            return;
        }

        auto myTransform = entity->GetComponent<TransformComponent>();
        auto physics = entity->GetComponent<PhysicsComponent>();
        auto wellTransform = well->GetComponent<TransformComponent>();
        auto wellGravity = well->GetComponent<GravityWellComponent>();
        if (!myTransform || !physics || !wellTransform || !wellGravity) {
            return;
        }

        if (!wellGravity->get().active) {
            return;
        }

        const float dx = wellTransform->get().x - myTransform->get().x;
        const float dy = wellTransform->get().y - myTransform->get().y;
        const float dist = std::sqrt(dx * dx + dy * dy);
        if (dist <= 0.0001f) {
            return;
        }

        const float clampedDist = std::max(dist, wellGravity->get().minDist);
        const float force = wellGravity->get().mass / (clampedDist * clampedDist);
        const float nx = dx / dist;
        const float ny = dy / dist;

        physics->get().vx += nx * force * dt;
        physics->get().vy += ny * force * dt;
    }
    void Cleanup() override {}
};

struct ColliderComponent : public Component {
    float radius = 8.0f;
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct ScrollComponent : public Component {
    float scrollX = 0.0f;
    float speed = 2.0f;
    float accel = 0.018f;
    void Setup() override {}
    void Update(float dt) override {
        speed += accel * dt;
        scrollX += speed * dt * 60.0f;
    }
    void Cleanup() override {}
};

struct ScrollableComponent : public Component {
    float worldX = 0.0f;
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct SpawnComponent : public Component {
    float cursorWX = 0.0f;
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct TrailComponent : public Component {
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct ProjectionComponent : public Component {
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct MeterComponent : public Component {
    float value = 60.0f;
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct HudComponent : public Component {
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct RenderComponent : public Component {
    virtual void Draw() {}
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct NullZoneComponent : public Component {
    float width = 70.0f;
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};

struct CollectibleComponent : public Component {
    bool collected = false;
    void Setup() override {}
    void Update(float) override {}
    void Cleanup() override {}
};