107 lines
1.8 KiB
C++
107 lines
1.8 KiB
C++
/*
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* Copyright 2011-2021 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#ifndef PARTICLE_SYSTEM_H_HEADER_GUARD
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#define PARTICLE_SYSTEM_H_HEADER_GUARD
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#include <bx/allocator.h>
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#include <bx/easing.h>
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#include <bx/rng.h>
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#include "../bounds.h"
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struct EmitterHandle { uint16_t idx; };
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struct EmitterSpriteHandle { uint16_t idx; };
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template<typename Ty>
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inline bool isValid(Ty _handle)
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{
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return _handle.idx != UINT16_MAX;
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}
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struct EmitterShape
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{
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enum Enum
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{
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Sphere,
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Hemisphere,
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Circle,
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Disc,
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Rect,
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Count
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};
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};
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struct EmitterDirection
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{
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enum Enum
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{
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Up,
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Outward,
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Count
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};
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};
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struct EmitterUniforms
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{
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void reset();
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float m_position[3];
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float m_angle[3];
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float m_blendStart[2];
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float m_blendEnd[2];
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float m_offsetStart[2];
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float m_offsetEnd[2];
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float m_scaleStart[2];
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float m_scaleEnd[2];
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float m_lifeSpan[2];
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float m_gravityScale;
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uint32_t m_rgba[5];
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uint32_t m_particlesPerSecond;
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bx::Easing::Enum m_easePos;
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bx::Easing::Enum m_easeRgba;
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bx::Easing::Enum m_easeBlend;
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bx::Easing::Enum m_easeScale;
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EmitterSpriteHandle m_handle;
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};
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///
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void psInit(uint16_t _maxEmitters = 64, bx::AllocatorI* _allocator = NULL);
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///
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void psShutdown();
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///
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EmitterSpriteHandle psCreateSprite(uint16_t _width, uint16_t _height, const void* _data);
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///
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void psDestroy(EmitterSpriteHandle _handle);
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///
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EmitterHandle psCreateEmitter(EmitterShape::Enum _shape, EmitterDirection::Enum _direction, uint32_t _maxParticles);
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///
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void psUpdateEmitter(EmitterHandle _handle, const EmitterUniforms* _uniforms = NULL);
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///
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void psGetAabb(EmitterHandle _handle, Aabb& _outAabb);
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///
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void psDestroyEmitter(EmitterHandle _handle);
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///
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void psUpdate(float _dt);
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///
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void psRender(uint8_t _view, const float* _mtxView, const bx::Vec3& _eye);
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#endif // PARTICLE_SYSTEM_H_HEADER_GUARD
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