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/*
* Copyright 2011-2013 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 __CAMERA_H__
#define __CAMERA_H__
#include "kernel/kernel_types.h"
#include "graph/node.h"
#include "util/util_boundbox.h"
#include "util/util_projection.h"
#include "util/util_transform.h"
#include "util/util_types.h"
CCL_NAMESPACE_BEGIN
class Device;
class DeviceScene;
class Scene;
/* Camera
*
* The camera parameters are quite standard, tested to be both compatible with
* Renderman, and Blender after remapping.
*/
class Camera : public Node {
public:
NODE_DECLARE
/* Specifies an offset for the shutter's time interval. */
enum MotionPosition {
/* Shutter opens at the current frame. */
MOTION_POSITION_START = 0,
/* Shutter is fully open at the current frame. */
MOTION_POSITION_CENTER = 1,
/* Shutter closes at the current frame. */
MOTION_POSITION_END = 2,
MOTION_NUM_POSITIONS,
};
/* Specifies rolling shutter effect. */
enum RollingShutterType {
/* No rolling shutter effect. */
ROLLING_SHUTTER_NONE = 0,
/* Sensor is being scanned vertically from top to bottom. */
ROLLING_SHUTTER_TOP = 1,
ROLLING_SHUTTER_NUM_TYPES,
};
/* Stereo Type */
enum StereoEye {
STEREO_NONE,
STEREO_LEFT,
STEREO_RIGHT,
};
/* motion blur */
float shuttertime;
MotionPosition motion_position;
array<float> shutter_curve;
size_t shutter_table_offset;
/* ** Rolling shutter effect. ** */
/* Defines rolling shutter effect type. */
RollingShutterType rolling_shutter_type;
/* Specifies exposure time of scanlines when using
* rolling shutter effect.
*/
float rolling_shutter_duration;
/* depth of field */
float focaldistance;
float aperturesize;
uint blades;
float bladesrotation;
/* type */
CameraType type;
float fov;
/* panorama */
PanoramaType panorama_type;
float fisheye_fov;
float fisheye_lens;
float latitude_min;
float latitude_max;
float longitude_min;
float longitude_max;
/* panorama stereo */
StereoEye stereo_eye;
bool use_spherical_stereo;
float interocular_distance;
float convergence_distance;
bool use_pole_merge;
float pole_merge_angle_from;
float pole_merge_angle_to;
/* anamorphic lens bokeh */
float aperture_ratio;
/* sensor */
float sensorwidth;
float sensorheight;
/* clipping */
float nearclip;
float farclip;
/* screen */
int width, height;
int resolution;
BoundBox2D viewplane;
/* width and height change during preview, so we need these for calculating dice rates. */
int full_width, full_height;
/* controls how fast the dicing rate falls off for geometry out side of view */
float offscreen_dicing_scale;
/* border */
BoundBox2D border;
BoundBox2D viewport_camera_border;
/* transformation */
Transform matrix;
/* motion */
array<Transform> motion;
bool use_perspective_motion;
float fov_pre, fov_post;
/* computed camera parameters */
ProjectionTransform screentoworld;
ProjectionTransform rastertoworld;
ProjectionTransform ndctoworld;
Transform cameratoworld;
ProjectionTransform worldtoraster;
ProjectionTransform worldtoscreen;
ProjectionTransform worldtondc;
Transform worldtocamera;
ProjectionTransform rastertocamera;
ProjectionTransform cameratoraster;
float3 dx;
float3 dy;
float3 full_dx;
float3 full_dy;
float3 frustum_right_normal;
float3 frustum_top_normal;
/* update */
bool need_update;
bool need_device_update;
bool need_flags_update;
int previous_need_motion;
/* Kernel camera data, copied here for dicing. */
KernelCamera kernel_camera;
array<DecomposedTransform> kernel_camera_motion;
/* functions */
Camera();
~Camera();
void compute_auto_viewplane();
void update(Scene *scene);
void device_update(Device *device, DeviceScene *dscene, Scene *scene);
void device_update_volume(Device *device, DeviceScene *dscene, Scene *scene);
void device_free(Device *device, DeviceScene *dscene, Scene *scene);
bool modified(const Camera& cam);
bool motion_modified(const Camera& cam);
void tag_update();
/* Public utility functions. */
BoundBox viewplane_bounds_get();
/* Calculates the width of a pixel at point in world space. */
float world_to_raster_size(float3 P);
/* Motion blur. */
float motion_time(int step) const;
int motion_step(float time) const;
bool use_motion() const;
private:
/* Private utility functions. */
float3 transform_raster_to_world(float raster_x, float raster_y);
};
CCL_NAMESPACE_END
#endif /* __CAMERA_H__ */
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