86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
#pragma once
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#include "ZLMath.h"
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#include "Renderer.h"
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#include "TextureManager.h"
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#include <vector>
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#include <chrono>
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#include <string>
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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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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<Vector3f> drawPositions;
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std::vector<Vector2f> drawTexCoords;
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bool drawDataDirty;
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VertexRenderStruct sparkQuad;
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std::shared_ptr<Texture> texture;
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int maxParticles;
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float particleSize;
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float biasX;
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// Ranges (used when config supplies intervals)
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struct FloatRange { float min; float max; };
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FloatRange speedRange; // XY speed
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FloatRange zSpeedRange; // Z speed
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FloatRange scaleRange;
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FloatRange lifeTimeRange;
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std::string shaderProgramName;
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void prepareDrawData();
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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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SparkEmitter(const std::vector<Vector3f>& positions,
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std::shared_ptr<Texture> tex,
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float rate = 100.0f);
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void setEmissionPoints(const std::vector<Vector3f>& positions);
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void setTexture(std::shared_ptr<Texture> tex);
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void setEmissionRate(float rate) { emissionRate = rate; }
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void setShaderProgramName(const std::string& name) { shaderProgramName = name; }
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void setMaxParticles(int max) { maxParticles = max; particles.resize(maxParticles); }
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void setParticleSize(float size) { particleSize = size; }
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void setBiasX(float bias) { biasX = bias; }
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bool loadFromJsonFile(const std::string& path, Renderer& renderer, const std::string& zipFile = "");
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void update(float deltaTimeMs);
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void emit();
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void draw(Renderer& renderer, float zoom, int screenWidth, int screenHeight);
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const std::vector<SparkParticle>& getParticles() const;
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size_t getActiveParticleCount() const;
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std::shared_ptr<Texture> getTexture() const { return texture; }
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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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