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.
122 lines
2.4 KiB
C++
122 lines
2.4 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 __CAMERA_H__
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#define __CAMERA_H__
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#include "kernel_types.h"
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#include "util_boundbox.h"
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#include "util_transform.h"
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#include "util_types.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 Scene;
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/* Camera
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*
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* The camera parameters are quite standard, tested to be both compatible with
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* Renderman, and Blender after remapping. */
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class Camera {
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public:
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/* motion blur */
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float shuttertime;
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/* depth of field */
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float focaldistance;
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float aperturesize;
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uint blades;
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float bladesrotation;
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/* type */
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CameraType type;
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float fov;
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/* panorama */
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PanoramaType panorama_type;
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float fisheye_fov;
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float fisheye_lens;
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/* sensor */
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float sensorwidth;
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float sensorheight;
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/* clipping */
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float nearclip;
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float farclip;
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/* screen */
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int width, height;
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int resolution;
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BoundBox2D viewplane;
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/* border */
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BoundBox2D border;
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/* transformation */
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Transform matrix;
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/* motion */
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MotionTransform motion;
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bool use_motion;
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/* computed camera parameters */
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Transform screentoworld;
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Transform rastertoworld;
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Transform ndctoworld;
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Transform cameratoworld;
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Transform worldtoraster;
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Transform worldtoscreen;
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Transform worldtondc;
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Transform worldtocamera;
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Transform rastertocamera;
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Transform cameratoraster;
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float3 dx;
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float3 dy;
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/* update */
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bool need_update;
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bool need_device_update;
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int previous_need_motion;
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/* functions */
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Camera();
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~Camera();
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void update();
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void device_update(Device *device, DeviceScene *dscene, Scene *scene);
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void device_free(Device *device, DeviceScene *dscene);
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bool modified(const Camera& cam);
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bool motion_modified(const Camera& cam);
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void tag_update();
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};
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CCL_NAMESPACE_END
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#endif /* __CAMERA_H__ */
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