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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#ifndef __UTIL_IES_H__
#define __UTIL_IES_H__
#include "util/string.h"
#include "util/vector.h"
CCL_NAMESPACE_BEGIN
class IESFile {
public:
IESFile()
{
}
~IESFile();
int packed_size();
void pack(float *data);
bool load(const string &ies);
void clear();
protected:
bool parse(const string &ies);
bool process();
bool process_type_b();
bool process_type_c();
/* The brightness distribution is stored in spherical coordinates.
* The horizontal angles correspond to theta in the regular notation
* and always span the full range from 0° to 360°.
* The vertical angles correspond to phi and always start at 0°. */
vector<float> v_angles, h_angles;
/* The actual values are stored here, with every entry storing the values
* of one horizontal segment. */
vector<vector<float>> intensity;
/* Types of angle representation in IES files. Currently, only B and C are supported. */
enum IESType { TYPE_A = 3, TYPE_B = 2, TYPE_C = 1 } type;
};
CCL_NAMESPACE_END
#endif /* __UTIL_IES_H__ */
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