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#include "types.h"
#include "mathlib.h"
#include "list.h"
struct Renderer2d;
struct Vertex2D;
struct SnowflakeLoadParameters {
i32 maxSnowflakes = 1000;
i32 initialSnowflakeCount = 100;
f32 rateOfSnowfall = 0.1f;
Vector2 flakeV0 = { 0, 1 };
f32 flakeSize = 5.f;
f32 flakeSizeDeviation = 1.f;
Vector4 snowColor = { 0.8, 0.8, 0.8, 1.0 };
f32 spawnIntervalSeconds = 0.3;
f32 windIntervalSeconds = 1.5;
};
struct SnowflakeUpdateData {
Vector2 v0;
Vector2 velocity;
Vector2 position;
f32 rotation;
bool isAlive = false;
bool onGround = false;
i32 vtxIdx = 0;
i32 numVertices = 0;
};
struct SnowflakeParticleRenderer {
f32 xMax = 0;
f32 yMax = 0;
f32 spawnIntervalSeconds = 0.3;
f32 windIntervalSeconds = 1.5;
i32 startIndex = 0;
i32 endIndex = 0;
i32 numSnowflakes = 0;
Vector2 windSpeed;
SnowflakeUpdateData* updateData;
f32 timeUntilNextSpawnSeconds = 0;
f32 timeUntilNextWindSeconds = 0;
u32 vao;
u32 vbo;
Mat4x4 model;
matte::List<Vertex2D> vertices;
void load(SnowflakeLoadParameters params, Renderer2d* renderer);
void update(f32 dtSeconds);
void render(Renderer2d* renderer);
void unload();
};
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