61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#pragma once
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#include "ZLMath.h"
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#include <vector>
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#include <chrono>
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namespace ZL {
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struct SparkParticle {
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Vector3f position;
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Vector3f velocity;
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float scale;
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float lifeTime;
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float maxLifeTime;
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bool active;
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int emitterIndex;
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Vector2f texCoord;
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SparkParticle() : position({ 0,0,0 }), velocity({ 0,0,0 }), scale(1.0f),
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lifeTime(0), maxLifeTime(1000.0f), active(false), emitterIndex(0) {
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}
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};
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class SparkEmitter {
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private:
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std::vector<SparkParticle> particles;
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std::vector<Vector3f> emissionPoints;
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std::chrono::steady_clock::time_point lastEmissionTime;
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float emissionRate;
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bool isActive;
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std::vector<float> positionBuffer;
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std::vector<float> texCoordBuffer;
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bool buffersDirty;
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int maxParticles;
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public:
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SparkEmitter();
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SparkEmitter(const std::vector<Vector3f>& positions, float rate = 100.0f);
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void setEmissionPoints(const std::vector<Vector3f>& positions);
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void update(float deltaTimeMs);
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void emit();
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const std::vector<SparkParticle>& getParticles() const;
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size_t getActiveParticleCount() const;
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const float* getPositionBuffer() const { return positionBuffer.data(); }
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const float* getTexCoordBuffer() const { return texCoordBuffer.data(); }
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size_t getBufferSize() const { return positionBuffer.size() / 4; }
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void updateBuffers();
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size_t getActiveParticleBufferIndex(size_t particleIndex) const;
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private:
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void initParticle(SparkParticle& particle, int emitterIndex);
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Vector3f getRandomVelocity(int emitterIndex);
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};
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} // namespace ZL
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