forked from bartvdbraak/blender
48155c210a
This patch adds support for IES files, a file format that is commonly used to store the directional intensity distribution of light sources. The new IES node is supposed to be plugged into the Strength input of the Emission node of the lamp. Since people generating IES files do not really seem to care about the standard, the parser is flexible enough to accept all test files I have tried. Some common weirdnesses are distributing values over multiple lines that should go into one line, using commas instead of spaces as delimiters and adding various useless stuff at the end of the file. The user interface of the node is similar to the script node, the user can either select an internal Text or load a file. Internally, IES files are handled similar to Image textures: They are stored in slots by the LightManager and each unique IES is assigned to one slot. The local coordinate system of the lamp is used, so that the direction of the light can be changed. For UI reasons, it's usually best to add an area light, rotate it and then change its type, since especially the point light does not immediately show its local coordinate system in the viewport. Reviewers: #cycles, dingto, sergey, brecht Reviewed By: #cycles, dingto, brecht Subscribers: OgDEV, crazyrobinhood, secundar, cardboard, pisuke, intrah, swerner, micah_denn, harvester, gottfried, disnel, campbellbarton, duarteframos, Lapineige, brecht, juicyfruit, dingto, marek, rickyblender, bliblubli, lockal, sergey Differential Revision: https://developer.blender.org/D1543
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/*
|
|
* Copyright 2011-2018 Blender Foundation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef __UTIL_IES_H__
|
|
#define __UTIL_IES_H__
|
|
|
|
#include "util/util_param.h"
|
|
#include "util/util_vector.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
class IESFile {
|
|
public:
|
|
IESFile() {}
|
|
~IESFile();
|
|
|
|
int packed_size();
|
|
void pack(float *data);
|
|
|
|
bool load(ustring ies);
|
|
void clear();
|
|
|
|
protected:
|
|
bool parse(ustring ies);
|
|
bool process();
|
|
bool process_type_b();
|
|
bool process_type_c();
|
|
|
|
/* The brightness distribution is stored in spherical coordinates.
|
|
* The horizontal angles correspond to 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__ */
|