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110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/*
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The MIT License (MIT)
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Copyright (c) 2016 Light Transport Entertainment, Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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// Simple Cyhair loader.
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#ifndef EXAMPLE_CYHAIR_LOADER_H_
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#define EXAMPLE_CYHAIR_LOADER_H_
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#include <cassert>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <vector>
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#include <iostream>
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namespace example {
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struct CyHairHeader {
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char magic[4];
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unsigned int num_strands;
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unsigned int total_points;
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unsigned int flags;
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unsigned int default_segments;
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float default_thickness;
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float default_transparency;
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float default_color[3];
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char infomation[88];
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};
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class CyHair {
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public:
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CyHair()
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: flags_(0),
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num_strands_(0),
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total_points_(0),
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default_segments_(-1),
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default_thickness_(0.01f),
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default_transparency_(1.0f) {
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default_color_[0] = 0.5f;
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default_color_[1] = 0.5f;
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default_color_[2] = 0.5f;
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}
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~CyHair() {}
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/// Load CyHair data from a file.
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bool Load(const char *filename);
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/// Convert to cubic bezier curves.
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/// 4(cubic) * 3(xyz) * num_curves = vertices.size()
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/// 4(cubic) * num_curves = radiuss.size()
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/// `max_strands` limits the number of strands to convert. -1 = convert all
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/// strands.
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/// `thickness` overwrites strand thickness if it have positive value.
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/// Apply `vertex_translate` after `vertex_scale`.
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/// TODO(syoyo) return strand/segment information
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bool ToCubicBezierCurves(std::vector<float> *vertices,
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std::vector<float> *radiuss,
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const float vertex_scale[3],
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const float vertex_translate[3],
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const int max_strands = -1,
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const float thickness = -1.0f);
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CyHairHeader header_;
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// Raw CyHair values
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std::vector<unsigned short> segments_;
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std::vector<float> points_; // xyz
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std::vector<float> thicknesses_;
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std::vector<float> transparencies_;
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std::vector<float> colors_; // rgb
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unsigned int flags_;
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unsigned int num_strands_;
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unsigned int total_points_;
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int default_segments_;
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float default_thickness_;
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float default_transparency_;
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float default_color_[3];
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int pad0;
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// Processed CyHair values
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std::vector<unsigned int> strand_offsets_;
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};
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} // namespace example
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#endif // EXAMPLE_CYHAIR_LOADER_H_
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