638b084f82
Code is added to restrict the pixel size of strands in cycles. It works best with ribbon primitives and a preset for these is included. It uses distance dependent expansion of the strands and then stochastic strand removal to give a fading. To prevent a slowdown for triangle mesh objects in the BVH an extra visibility flag has been added. It is also only applied for camera rays. The strand width settings are also changed, so that the particle size is not included in the width calculation. Instead there is a separate particle system parameter for width scaling.
143 lines
3.1 KiB
C++
143 lines
3.1 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __CURVES_H__
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#define __CURVES_H__
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#include "util_types.h"
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#include "util_vector.h"
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CCL_NAMESPACE_BEGIN
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class Device;
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class DeviceScene;
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class Progress;
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class Scene;
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void curvebounds(float *lower, float *upper, float3 *p, int dim);
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typedef enum curve_presets {
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CURVE_CUSTOM,
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CURVE_FAST_PLANES,
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CURVE_TANGENT_SHADING,
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CURVE_TRUE_NORMAL,
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CURVE_ACCURATE_PRESET,
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CURVE_SMOOTH_CURVES,
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CURVE_SMOOTH_RIBBONS
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} curve_presets;
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typedef enum curve_primitives {
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CURVE_TRIANGLES,
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CURVE_LINE_SEGMENTS,
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CURVE_SEGMENTS,
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CURVE_RIBBONS
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} curve_primitives;
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typedef enum curve_triangles {
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CURVE_CAMERA_TRIANGLES,
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CURVE_RIBBON_TRIANGLES,
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CURVE_TESSELATED_TRIANGLES
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} curve_triangles;
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typedef enum curve_lines {
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CURVE_ACCURATE,
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CURVE_CORRECTED,
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CURVE_POSTCORRECTED,
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CURVE_UNCORRECTED
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} curve_lines;
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typedef enum curve_interpolation {
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CURVE_LINEAR,
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CURVE_CARDINAL,
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CURVE_BSPLINE
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} curve_interpolation;
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class ParticleCurveData {
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public:
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ParticleCurveData();
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~ParticleCurveData();
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vector<int> psys_firstcurve;
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vector<int> psys_curvenum;
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vector<int> psys_shader;
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vector<float> psys_rootradius;
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vector<float> psys_tipradius;
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vector<float> psys_shape;
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vector<bool> psys_closetip;
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vector<int> curve_firstkey;
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vector<int> curve_keynum;
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vector<float> curve_length;
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vector<float3> curve_uv;
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vector<float3> curve_vcol;
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vector<float3> curvekey_co;
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vector<float> curvekey_time;
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};
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/* HairSystem Manager */
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class CurveSystemManager {
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public:
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int primitive;
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int line_method;
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int interpolation;
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int triangle_method;
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int resolution;
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int segments;
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int subdivisions;
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float normalmix;
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float encasing_ratio;
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float minimum_width;
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float maximum_width;
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bool use_curves;
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bool use_smooth;
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bool use_parents;
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bool use_encasing;
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bool use_backfacing;
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bool use_tangent_normal;
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bool use_tangent_normal_correction;
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bool use_tangent_normal_geometry;
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bool use_joined;
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bool need_update;
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bool need_mesh_update;
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CurveSystemManager();
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~CurveSystemManager();
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void device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
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void device_free(Device *device, DeviceScene *dscene);
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bool modified(const CurveSystemManager& CurveSystemManager);
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bool modified_mesh(const CurveSystemManager& CurveSystemManager);
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void tag_update(Scene *scene);
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void tag_update_mesh();
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};
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CCL_NAMESPACE_END
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#endif /* __CURVES_H__ */
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