rt_particles_cb.h

/*
* Copyright (c) 2014-2022, NVIDIA CORPORATION. All rights reserved.
*
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*
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#ifndef PARTICLES_CB_H
#define PARTICLES_CB_H

#include <donut/shaders/view_cb.h>

struct GlobalConstants
{
    PlanarViewConstants view;

    float primaryRayConeAngle;
    uint reorientParticlesInPrimaryRays;
    uint reorientParticlesInSecondaryRays;
    uint orientationMode;

    int environmentMapTextureIndex;
};

struct ParticleInfo
{
    float3 center;
    float rotation;

    float3 xAxis;
    float inverseRadius;

    float3 yAxis;
    int textureIndex;

    float3 colorFactor;
    float opacityFactor;
};

#define INSTANCE_MASK_OPAQUE                1
#define INSTANCE_MASK_PARTICLE_GEOMETRY     2
#define INSTANCE_MASK_INTERSECTION_PARTICLE 4

#define ORIENTATION_MODE_AVT_MATRIX         0
#define ORIENTATION_MODE_QUATERNION         1
#define ORIENTATION_MODE_BEAM               2
#define ORIENTATION_MODE_BASIS              3

#endif // PARTICLES_CB_H