Kelsidavis-WoWee/include/rendering/swim_effects.hpp

#pragma once

#include <vulkan/vulkan.h>
#include <vk_mem_alloc.h>
#include <glm/glm.hpp>
#include <vector>

namespace wowee {
namespace rendering {

class Camera;
class CameraController;
class WaterRenderer;
class VkContext;

class SwimEffects {
public:
    SwimEffects();
    ~SwimEffects();

    bool initialize(VkContext* ctx, VkDescriptorSetLayout perFrameLayout);
    void shutdown();
    void recreatePipelines();
    void update(const Camera& camera, const CameraController& cc,
                const WaterRenderer& water, float deltaTime);
    void render(VkCommandBuffer cmd, VkDescriptorSet perFrameSet);
    void spawnFootSplash(const glm::vec3& footPos, float waterH);

private:
    struct Particle {
        glm::vec3 position;
        glm::vec3 velocity;
        float lifetime;
        float maxLifetime;
        float size;
        float alpha;
    };

    static constexpr int MAX_RIPPLE_PARTICLES = 200;
    static constexpr int MAX_BUBBLE_PARTICLES = 150;

    std::vector<Particle> ripples;
    std::vector<Particle> bubbles;

    // Vulkan objects
    VkContext* vkCtx = nullptr;

    // Ripple pipeline + dynamic buffer
    VkPipeline ripplePipeline = VK_NULL_HANDLE;
    VkPipelineLayout ripplePipelineLayout = VK_NULL_HANDLE;
    ::VkBuffer rippleDynamicVB = VK_NULL_HANDLE;
    VmaAllocation rippleDynamicVBAlloc = VK_NULL_HANDLE;
    VmaAllocationInfo rippleDynamicVBAllocInfo{};
    VkDeviceSize rippleDynamicVBSize = 0;

    // Bubble pipeline + dynamic buffer
    VkPipeline bubblePipeline = VK_NULL_HANDLE;
    VkPipelineLayout bubblePipelineLayout = VK_NULL_HANDLE;
    ::VkBuffer bubbleDynamicVB = VK_NULL_HANDLE;
    VmaAllocation bubbleDynamicVBAlloc = VK_NULL_HANDLE;
    VmaAllocationInfo bubbleDynamicVBAllocInfo{};
    VkDeviceSize bubbleDynamicVBSize = 0;

    std::vector<float> rippleVertexData;
    std::vector<float> bubbleVertexData;

    float rippleSpawnAccum = 0.0f;
    float bubbleSpawnAccum = 0.0f;

    void spawnRipple(const glm::vec3& pos, const glm::vec3& moveDir, float waterH);
    void spawnBubble(const glm::vec3& pos, float waterH);
};

} // namespace rendering
} // namespace wowee