ai_shader_lights.h

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// Copyright 2021 Autodesk, Inc.  All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk license
// agreement provided at the time of installation or download, or which
// otherwise accompanies this software in either electronic or hard copy form.
 
#pragma once
#include "ai_nodes.h"
#include "ai_shaderglobals.h"
#include "ai_color.h"
#include "ai_vector.h"
#include "ai_ray.h"
 
struct AtLightSample {
   AI_DEVICE AtLightSample() :
      Lp             (NULL),
      Ldist          (0.f),
      Ld             (AI_V3_ZERO),
      Li             (AI_RGB_BLACK),
      Liu            (AI_RGB_BLACK),
      Lo             (AI_RGB_BLACK),
      pdf            (0.f),
      trace_ray_types(0) {}
 
   const AtNode*             Lp;              
   float                     Ldist;           
   AtVector                  Ld;              
   AtRGB                     Li;              
   AtRGB                     Liu;             
   AtRGB                     Lo;              
   float                     pdf;             
   uint8_t                   trace_ray_types; 
};
 
AI_API void      AiLightsPrepare(AtShaderGlobals* sg);
AI_API bool      AiLightsGetSample(AtShaderGlobals* sg, AtLightSample& sample);
AI_API uint32_t  AiLightsTrace(AtShaderGlobals* sg, const AtVector& dir, uint8_t ray_type, AtLightSample*& hits);
AI_API uint8_t   AiLightsTraceRayTypes(AtShaderGlobals* sg);
AI_API void      AiLightsResetCache(AtShaderGlobals* sg);
AI_API AtRGB     AiLightsIntegrateShadowMatte(AtShaderGlobals* sg, AtBSDF *bsdf = NULL);
/*\}*/
 
AI_API AI_PURE AtRGB AiLightGetColor(const AtNode* node);
AI_API AI_PURE float AiLightGetIntensity(const AtNode* node);
AI_API AI_PURE float AiLightGetDiffuse(const AtNode* node);
AI_API AI_PURE float AiLightGetSpecular(const AtNode* node);
AI_API AI_PURE float AiLightGetTransmission(const AtNode* node);
AI_API AI_PURE float AiLightGetSSS(const AtNode* node);
AI_API AI_PURE float AiLightGetVolume(const AtNode* node);
AI_API AI_PURE float AiLightGetInfluence(const AtShaderGlobals* sg, const AtNode* node, uint8_t ray_type);
/*\}*/
 
AI_API bool AiLightIESLoad(const AtString filename, const unsigned int width, const unsigned int height, float* max_intensity, float* data);
 
/*\}*/
 
/*\}*/