tmaq
/
tornavis
1
0
Fork 0
Code Issues 2 Pull Requests 29 Packages Projects 24 Releases Wiki Activity
tornavis/source/blender/blenkernel/intern/camera.c

1058 lines
31 KiB
C
Raw Blame History

/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
#include <stddef.h>
#include <stdlib.h>
#include "DNA_ID.h"
#include "DNA_camera_types.h"
#include "DNA_defaults.h"
#include "DNA_light_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_view3d_types.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_rect.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "BKE_camera.h"
#include "BKE_idtype.h"
#include "BKE_layer.h"
#include "BKE_lib_id.h"
#include "BKE_main.h"
#include "BKE_object.h"
#include "BKE_scene.h"
#include "BKE_screen.h"
#include "BLT_translation.h"
#include "DEG_depsgraph_query.h"
#include "MEM_guardedalloc.h"
/****************************** Camera Datablock *****************************/
static void camera_init_data(ID *id)
{
Camera *cam = (Camera *)id;
BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(cam, id));
MEMCPY_STRUCT_AFTER(cam, DNA_struct_default_get(Camera), id);
}
void *BKE_camera_add(Main *bmain, const char *name)
{
Camera *cam;
cam = BKE_libblock_alloc(bmain, ID_CA, name, 0);
camera_init_data(&cam->id);
return cam;
}
/**
* Only copy internal data of Camera ID from source
* to already allocated/initialized destination.
* You probably never want to use that directly,
* use #BKE_id_copy or #BKE_id_copy_ex for typical needs.
*
* WARNING! This function will not handle ID user count!
*
* \param flag: Copying options (see BKE_lib_id.h's LIB_ID_COPY_... flags for more).
*/
static void camera_copy_data(Main *UNUSED(bmain),
ID *id_dst,
const ID *id_src,
const int UNUSED(flag))
{
Camera *cam_dst = (Camera *)id_dst;
const Camera *cam_src = (const Camera *)id_src;
BLI_duplicatelist(&cam_dst->bg_images, &cam_src->bg_images);
}
Camera *BKE_camera_copy(Main *bmain, const Camera *cam)
{
Camera *cam_copy;
BKE_id_copy(bmain, &cam->id, (ID **)&cam_copy);
return cam_copy;
}
static void camera_make_local(Main *bmain, ID *id, const int flags)
{
BKE_lib_id_make_local_generic(bmain, id, flags);
}
/** Free (or release) any data used by this camera (does not free the camera itself). */
static void camera_free_data(ID *id)
{
Camera *cam = (Camera *)id;
BLI_freelistN(&cam->bg_images);
}
IDTypeInfo IDType_ID_CA = {
.id_code = ID_CA,
.id_filter = FILTER_ID_CA,
.main_listbase_index = INDEX_ID_CA,
.struct_size = sizeof(Camera),
.name = "Camera",
.name_plural = "cameras",
.translation_context = BLT_I18NCONTEXT_ID_CAMERA,
.flags = 0,
.init_data = camera_init_data,
.copy_data = camera_copy_data,
.free_data = camera_free_data,
.make_local = camera_make_local,
};
/******************************** Camera Usage *******************************/
/* get the camera's dof value, takes the dof object into account */
float BKE_camera_object_dof_distance(Object *ob)
{
Camera *cam = (Camera *)ob->data;
if (ob->type != OB_CAMERA) {
return 0.0f;
}
if (cam->dof.focus_object) {
float view_dir[3], dof_dir[3];
normalize_v3_v3(view_dir, ob->obmat[2]);
sub_v3_v3v3(dof_dir, ob->obmat[3], cam->dof.focus_object->obmat[3]);
return fabsf(dot_v3v3(view_dir, dof_dir));
}
return cam->dof.focus_distance;
}
float BKE_camera_sensor_size(int sensor_fit, float sensor_x, float sensor_y)
{
/* sensor size used to fit to. for auto, sensor_x is both x and y. */
if (sensor_fit == CAMERA_SENSOR_FIT_VERT) {
return sensor_y;
}
return sensor_x;
}
int BKE_camera_sensor_fit(int sensor_fit, float sizex, float sizey)
{
if (sensor_fit == CAMERA_SENSOR_FIT_AUTO) {
if (sizex >= sizey) {
return CAMERA_SENSOR_FIT_HOR;
}
else {
return CAMERA_SENSOR_FIT_VERT;
}
}
return sensor_fit;
}
/******************************** Camera Params *******************************/
void BKE_camera_params_init(CameraParams *params)
{
memset(params, 0, sizeof(CameraParams));
/* defaults */
params->sensor_x = DEFAULT_SENSOR_WIDTH;
params->sensor_y = DEFAULT_SENSOR_HEIGHT;
params->sensor_fit = CAMERA_SENSOR_FIT_AUTO;
params->zoom = 1.0f;
/* fallback for non camera objects */
params->clip_start = 0.1f;
params->clip_end = 100.0f;
}
void BKE_camera_params_from_object(CameraParams *params, const Object *ob)
{
if (!ob) {
return;
}
if (ob->type == OB_CAMERA) {
/* camera object */
Camera *cam = ob->data;
if (cam->type == CAM_ORTHO) {
params->is_ortho = true;
}
params->lens = cam->lens;
params->ortho_scale = cam->ortho_scale;
params->shiftx = cam->shiftx;
params->shifty = cam->shifty;
params->sensor_x = cam->sensor_x;
params->sensor_y = cam->sensor_y;
params->sensor_fit = cam->sensor_fit;
params->clip_start = cam->clip_start;
params->clip_end = cam->clip_end;
}
else if (ob->type == OB_LAMP) {
/* light object */
Light *la = ob->data;
params->lens = 16.0f / tanf(la->spotsize * 0.5f);
if (params->lens == 0.0f) {
params->lens = 35.0f;
}
}
else {
params->lens = 35.0f;
}
}
void BKE_camera_params_from_view3d(CameraParams *params,
Depsgraph *depsgraph,
const View3D *v3d,
const RegionView3D *rv3d)
{
/* common */
params->lens = v3d->lens;
params->clip_start = v3d->clip_start;
params->clip_end = v3d->clip_end;
if (rv3d->persp == RV3D_CAMOB) {
/* camera view */
const Object *ob_camera_eval = DEG_get_evaluated_object(depsgraph, v3d->camera);
BKE_camera_params_from_object(params, ob_camera_eval);
params->zoom = BKE_screen_view3d_zoom_to_fac(rv3d->camzoom);
params->offsetx = 2.0f * rv3d->camdx * params->zoom;
params->offsety = 2.0f * rv3d->camdy * params->zoom;
params->shiftx *= params->zoom;
params->shifty *= params->zoom;
params->zoom = CAMERA_PARAM_ZOOM_INIT_CAMOB / params->zoom;
}
else if (rv3d->persp == RV3D_ORTHO) {
/* orthographic view */
float sensor_size = BKE_camera_sensor_size(
params->sensor_fit, params->sensor_x, params->sensor_y);
/* Halve, otherwise too extreme low zbuffer quality. */
params->clip_end *= 0.5f;
params->clip_start = -params->clip_end;
params->is_ortho = true;
/* make sure any changes to this match ED_view3d_radius_to_dist_ortho() */
params->ortho_scale = rv3d->dist * sensor_size / v3d->lens;
params->zoom = CAMERA_PARAM_ZOOM_INIT_PERSP;
}
else {
/* perspective view */
params->zoom = CAMERA_PARAM_ZOOM_INIT_PERSP;
}
}
void BKE_camera_params_compute_viewplane(
CameraParams *params, int winx, int winy, float xasp, float yasp)
{
rctf viewplane;
float pixsize, viewfac, sensor_size, dx, dy;
int sensor_fit;
params->ycor = yasp / xasp;
if (params->is_ortho) {
/* orthographic camera */
/* scale == 1.0 means exact 1 to 1 mapping */
pixsize = params->ortho_scale;
}
else {
/* perspective camera */
sensor_size = BKE_camera_sensor_size(params->sensor_fit, params->sensor_x, params->sensor_y);
pixsize = (sensor_size * params->clip_start) / params->lens;
}
/* determine sensor fit */
sensor_fit = BKE_camera_sensor_fit(params->sensor_fit, xasp * winx, yasp * winy);
if (sensor_fit == CAMERA_SENSOR_FIT_HOR) {
viewfac = winx;
}
else {
viewfac = params->ycor * winy;
}
pixsize /= viewfac;
/* extra zoom factor */
pixsize *= params->zoom;
/* compute view plane:
* fully centered, zbuffer fills in jittered between -.5 and +.5 */
viewplane.xmin = -0.5f * (float)winx;
viewplane.ymin = -0.5f * params->ycor * (float)winy;
viewplane.xmax = 0.5f * (float)winx;
viewplane.ymax = 0.5f * params->ycor * (float)winy;
/* lens shift and offset */
dx = params->shiftx * viewfac + winx * params->offsetx;
dy = params->shifty * viewfac + winy * params->offsety;
viewplane.xmin += dx;
viewplane.ymin += dy;
viewplane.xmax += dx;
viewplane.ymax += dy;
/* the window matrix is used for clipping, and not changed during OSA steps */
/* using an offset of +0.5 here would give clip errors on edges */
viewplane.xmin *= pixsize;
viewplane.xmax *= pixsize;
viewplane.ymin *= pixsize;
viewplane.ymax *= pixsize;
/* Used for rendering (offset by near-clip with perspective views), passed to RE_SetPixelSize.
* For viewport drawing 'RegionView3D.pixsize'. */
params->viewdx = pixsize;
params->viewdy = params->ycor * pixsize;
params->viewplane = viewplane;
}
/* viewplane is assumed to be already computed */
void BKE_camera_params_compute_matrix(CameraParams *params)
{
rctf viewplane = params->viewplane;
/* compute projection matrix */
if (params->is_ortho) {
orthographic_m4(params->winmat,
viewplane.xmin,
viewplane.xmax,
viewplane.ymin,
viewplane.ymax,
params->clip_start,
params->clip_end);
}
else {
perspective_m4(params->winmat,
viewplane.xmin,
viewplane.xmax,
viewplane.ymin,
viewplane.ymax,
params->clip_start,
params->clip_end);
}
}
/***************************** Camera View Frame *****************************/
void BKE_camera_view_frame_ex(const Scene *scene,
const Camera *camera,
const float drawsize,
const bool do_clip,
const float scale[3],
float r_asp[2],
float r_shift[2],
float *r_drawsize,
float r_vec[4][3])
{
float facx, facy;
float depth;
/* aspect correction */
if (scene) {
float aspx = (float)scene->r.xsch * scene->r.xasp;
float aspy = (float)scene->r.ysch * scene->r.yasp;
int sensor_fit = BKE_camera_sensor_fit(camera->sensor_fit, aspx, aspy);
if (sensor_fit == CAMERA_SENSOR_FIT_HOR) {
r_asp[0] = 1.0;
r_asp[1] = aspy / aspx;
}
else {
r_asp[0] = aspx / aspy;
r_asp[1] = 1.0;
}
}
else {
r_asp[0] = 1.0f;
r_asp[1] = 1.0f;
}
if (camera->type == CAM_ORTHO) {
facx = 0.5f * camera->ortho_scale * r_asp[0] * scale[0];
facy = 0.5f * camera->ortho_scale * r_asp[1] * scale[1];
r_shift[0] = camera->shiftx * camera->ortho_scale * scale[0];
r_shift[1] = camera->shifty * camera->ortho_scale * scale[1];
depth = -drawsize * scale[2];
*r_drawsize = 0.5f * camera->ortho_scale;
}
else {
/* that way it's always visible - clip_start+0.1 */
float fac, scale_x, scale_y;
float half_sensor = 0.5f * ((camera->sensor_fit == CAMERA_SENSOR_FIT_VERT) ?
(camera->sensor_y) :
(camera->sensor_x));
/* fixed size, variable depth (stays a reasonable size in the 3D view) */
*r_drawsize = (drawsize / 2.0f) / ((scale[0] + scale[1] + scale[2]) / 3.0f);
depth = *r_drawsize * camera->lens / (-half_sensor) * scale[2];
fac = *r_drawsize;
scale_x = scale[0];
scale_y = scale[1];
facx = fac * r_asp[0] * scale_x;
facy = fac * r_asp[1] * scale_y;
r_shift[0] = camera->shiftx * fac * 2.0f * scale_x;
r_shift[1] = camera->shifty * fac * 2.0f * scale_y;
}
r_vec[0][0] = r_shift[0] + facx;
r_vec[0][1] = r_shift[1] + facy;
r_vec[0][2] = depth;
r_vec[1][0] = r_shift[0] + facx;
r_vec[1][1] = r_shift[1] - facy;
r_vec[1][2] = depth;
r_vec[2][0] = r_shift[0] - facx;
r_vec[2][1] = r_shift[1] - facy;
r_vec[2][2] = depth;
r_vec[3][0] = r_shift[0] - facx;
r_vec[3][1] = r_shift[1] + facy;
r_vec[3][2] = depth;
if (do_clip) {
/* Ensure the frame isn't behind the near clipping plane, T62814. */
float fac = (camera->clip_start + 0.1f) / -r_vec[0][2];
for (uint i = 0; i < 4; i++) {
if (camera->type == CAM_ORTHO) {
r_vec[i][2] *= fac;
}
else {
mul_v3_fl(r_vec[i], fac);
}
}
}
}
void BKE_camera_view_frame(const Scene *scene, const Camera *camera, float r_vec[4][3])
{
float dummy_asp[2];
float dummy_shift[2];
float dummy_drawsize;
const float dummy_scale[3] = {1.0f, 1.0f, 1.0f};
BKE_camera_view_frame_ex(
scene, camera, 1.0, false, dummy_scale, dummy_asp, dummy_shift, &dummy_drawsize, r_vec);
}
#define CAMERA_VIEWFRAME_NUM_PLANES 4
typedef struct CameraViewFrameData {
float plane_tx[CAMERA_VIEWFRAME_NUM_PLANES][4]; /* 4 planes */
float normal_tx[CAMERA_VIEWFRAME_NUM_PLANES][3];
float dist_vals_sq[CAMERA_VIEWFRAME_NUM_PLANES]; /* distance squared (signed) */
unsigned int tot;
/* Ortho camera only. */
bool is_ortho;
float camera_no[3];
float dist_to_cam;
/* Not used by callbacks... */
float camera_rotmat[3][3];
} CameraViewFrameData;
static void camera_to_frame_view_cb(const float co[3], void *user_data)
{
CameraViewFrameData *data = (CameraViewFrameData *)user_data;
unsigned int i;
for (i = 0; i < CAMERA_VIEWFRAME_NUM_PLANES; i++) {
const float nd = dist_signed_squared_to_plane_v3(co, data->plane_tx[i]);
CLAMP_MAX(data->dist_vals_sq[i], nd);
}
if (data->is_ortho) {
const float d = dot_v3v3(data->camera_no, co);
CLAMP_MAX(data->dist_to_cam, d);
}
data->tot++;
}
static void camera_frame_fit_data_init(const Scene *scene,
const Object *ob,
CameraParams *params,
CameraViewFrameData *data)
{
float camera_rotmat_transposed_inversed[4][4];
unsigned int i;
/* setup parameters */
BKE_camera_params_init(params);
BKE_camera_params_from_object(params, ob);
/* compute matrix, viewplane, .. */
if (scene) {
BKE_camera_params_compute_viewplane(
params, scene->r.xsch, scene->r.ysch, scene->r.xasp, scene->r.yasp);
}
else {
BKE_camera_params_compute_viewplane(params, 1, 1, 1.0f, 1.0f);
}
BKE_camera_params_compute_matrix(params);
/* initialize callback data */
copy_m3_m4(data->camera_rotmat, (float(*)[4])ob->obmat);
normalize_m3(data->camera_rotmat);
/* To transform a plane which is in its homogeneous representation (4d vector),
* we need the inverse of the transpose of the transform matrix... */
copy_m4_m3(camera_rotmat_transposed_inversed, data->camera_rotmat);
transpose_m4(camera_rotmat_transposed_inversed);
invert_m4(camera_rotmat_transposed_inversed);
/* Extract frustum planes from projection matrix. */
planes_from_projmat(
params->winmat,
/* left right top bottom near far */
data->plane_tx[2],
data->plane_tx[0],
data->plane_tx[3],
data->plane_tx[1],
NULL,
NULL);
/* Rotate planes and get normals from them */
for (i = 0; i < CAMERA_VIEWFRAME_NUM_PLANES; i++) {
mul_m4_v4(camera_rotmat_transposed_inversed, data->plane_tx[i]);
normalize_v3_v3(data->normal_tx[i], data->plane_tx[i]);
}
copy_v4_fl(data->dist_vals_sq, FLT_MAX);
data->tot = 0;
data->is_ortho = params->is_ortho;
if (params->is_ortho) {
/* we want (0, 0, -1) transformed by camera_rotmat, this is a quicker shortcut. */
negate_v3_v3(data->camera_no, data->camera_rotmat[2]);
data->dist_to_cam = FLT_MAX;
}
}
static bool camera_frame_fit_calc_from_data(CameraParams *params,
CameraViewFrameData *data,
float r_co[3],
float *r_scale)
{
float plane_tx[CAMERA_VIEWFRAME_NUM_PLANES][4];
unsigned int i;
if (data->tot <= 1) {
return false;
}
if (params->is_ortho) {
const float *cam_axis_x = data->camera_rotmat[0];
const float *cam_axis_y = data->camera_rotmat[1];
const float *cam_axis_z = data->camera_rotmat[2];
float dists[CAMERA_VIEWFRAME_NUM_PLANES];
float scale_diff;
/* apply the dist-from-plane's to the transformed plane points */
for (i = 0; i < CAMERA_VIEWFRAME_NUM_PLANES; i++) {
dists[i] = sqrtf_signed(data->dist_vals_sq[i]);
}
if ((dists[0] + dists[2]) > (dists[1] + dists[3])) {
scale_diff = (dists[1] + dists[3]) *
(BLI_rctf_size_x(&params->viewplane) / BLI_rctf_size_y(&params->viewplane));
}
else {
scale_diff = (dists[0] + dists[2]) *
(BLI_rctf_size_y(&params->viewplane) / BLI_rctf_size_x(&params->viewplane));
}
*r_scale = params->ortho_scale - scale_diff;
zero_v3(r_co);
madd_v3_v3fl(r_co, cam_axis_x, (dists[2] - dists[0]) * 0.5f + params->shiftx * scale_diff);
madd_v3_v3fl(r_co, cam_axis_y, (dists[1] - dists[3]) * 0.5f + params->shifty * scale_diff);
madd_v3_v3fl(r_co, cam_axis_z, -(data->dist_to_cam - 1.0f - params->clip_start));
return true;
}
else {
float plane_isect_1[3], plane_isect_1_no[3], plane_isect_1_other[3];
float plane_isect_2[3], plane_isect_2_no[3], plane_isect_2_other[3];
float plane_isect_pt_1[3], plane_isect_pt_2[3];
/* apply the dist-from-plane's to the transformed plane points */
for (i = 0; i < CAMERA_VIEWFRAME_NUM_PLANES; i++) {
float co[3];
mul_v3_v3fl(co, data->normal_tx[i], sqrtf_signed(data->dist_vals_sq[i]));
plane_from_point_normal_v3(plane_tx[i], co, data->normal_tx[i]);
}
if ((!isect_plane_plane_v3(plane_tx[0], plane_tx[2], plane_isect_1, plane_isect_1_no)) ||
(!isect_plane_plane_v3(plane_tx[1], plane_tx[3], plane_isect_2, plane_isect_2_no))) {
return false;
}
add_v3_v3v3(plane_isect_1_other, plane_isect_1, plane_isect_1_no);
add_v3_v3v3(plane_isect_2_other, plane_isect_2, plane_isect_2_no);
if (isect_line_line_v3(plane_isect_1,
plane_isect_1_other,
plane_isect_2,
plane_isect_2_other,
plane_isect_pt_1,
plane_isect_pt_2) != 0) {
float cam_plane_no[3];
float plane_isect_delta[3];
float plane_isect_delta_len;
float shift_fac = BKE_camera_sensor_size(
params->sensor_fit, params->sensor_x, params->sensor_y) /
params->lens;
/* we want (0, 0, -1) transformed by camera_rotmat, this is a quicker shortcut. */
negate_v3_v3(cam_plane_no, data->camera_rotmat[2]);
sub_v3_v3v3(plane_isect_delta, plane_isect_pt_2, plane_isect_pt_1);
plane_isect_delta_len = len_v3(plane_isect_delta);
if (dot_v3v3(plane_isect_delta, cam_plane_no) > 0.0f) {
copy_v3_v3(r_co, plane_isect_pt_1);
/* offset shift */
normalize_v3(plane_isect_1_no);
madd_v3_v3fl(r_co, plane_isect_1_no, params->shifty * plane_isect_delta_len * shift_fac);
}
else {
copy_v3_v3(r_co, plane_isect_pt_2);
/* offset shift */
normalize_v3(plane_isect_2_no);
madd_v3_v3fl(r_co, plane_isect_2_no, params->shiftx * plane_isect_delta_len * shift_fac);
}
return true;
}
}
return false;
}
/* don't move the camera, just yield the fit location */
/* r_scale only valid/useful for ortho cameras */
bool BKE_camera_view_frame_fit_to_scene(
Depsgraph *depsgraph, const Scene *scene, Object *camera_ob, float r_co[3], float *r_scale)
{
CameraParams params;
CameraViewFrameData data_cb;
/* just in case */
*r_scale = 1.0f;
camera_frame_fit_data_init(scene, camera_ob, &params, &data_cb);
/* run callback on all visible points */
BKE_scene_foreach_display_point(depsgraph, camera_to_frame_view_cb, &data_cb);
return camera_frame_fit_calc_from_data(&params, &data_cb, r_co, r_scale);
}
bool BKE_camera_view_frame_fit_to_coords(const Depsgraph *depsgraph,
const float (*cos)[3],
int num_cos,
Object *camera_ob,
float r_co[3],
float *r_scale)
{
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Object *camera_ob_eval = DEG_get_evaluated_object(depsgraph, camera_ob);
CameraParams params;
CameraViewFrameData data_cb;
/* just in case */
*r_scale = 1.0f;
camera_frame_fit_data_init(scene_eval, camera_ob_eval, &params, &data_cb);
/* run callback on all given coordinates */
while (num_cos--) {
camera_to_frame_view_cb(cos[num_cos], &data_cb);
}
return camera_frame_fit_calc_from_data(&params, &data_cb, r_co, r_scale);
}
/******************* multiview matrix functions ***********************/
static void camera_model_matrix(const Object *camera, float r_modelmat[4][4])
{
copy_m4_m4(r_modelmat, camera->obmat);
}
static void camera_stereo3d_model_matrix(const Object *camera,
const bool is_left,
float r_modelmat[4][4])
{
Camera *data = (Camera *)camera->data;
float interocular_distance, convergence_distance;
short convergence_mode, pivot;
float sizemat[4][4];
float fac = 1.0f;
float fac_signed;
interocular_distance = data->stereo.interocular_distance;
convergence_distance = data->stereo.convergence_distance;
convergence_mode = data->stereo.convergence_mode;
pivot = data->stereo.pivot;
if (((pivot == CAM_S3D_PIVOT_LEFT) && is_left) || ((pivot == CAM_S3D_PIVOT_RIGHT) && !is_left)) {
camera_model_matrix(camera, r_modelmat);
return;
}
else {
float size[3];
mat4_to_size(size, camera->obmat);
size_to_mat4(sizemat, size);
}
if (pivot == CAM_S3D_PIVOT_CENTER) {
fac = 0.5f;
}
fac_signed = is_left ? fac : -fac;
/* rotation */
if (convergence_mode == CAM_S3D_TOE) {
float angle;
float angle_sin, angle_cos;
float toeinmat[4][4];
float rotmat[4][4];
unit_m4(rotmat);
if (pivot == CAM_S3D_PIVOT_CENTER) {
fac = -fac;
fac_signed = -fac_signed;
}
angle = atanf((interocular_distance * 0.5f) / convergence_distance) / fac;
angle_cos = cosf(angle * fac_signed);
angle_sin = sinf(angle * fac_signed);
rotmat[0][0] = angle_cos;
rotmat[2][0] = -angle_sin;
rotmat[0][2] = angle_sin;
rotmat[2][2] = angle_cos;
if (pivot == CAM_S3D_PIVOT_CENTER) {
/* set the rotation */
copy_m4_m4(toeinmat, rotmat);
/* set the translation */
toeinmat[3][0] = interocular_distance * fac_signed;
/* transform */
normalize_m4_m4(r_modelmat, camera->obmat);
mul_m4_m4m4(r_modelmat, r_modelmat, toeinmat);
/* scale back to the original size */
mul_m4_m4m4(r_modelmat, r_modelmat, sizemat);
}
else { /* CAM_S3D_PIVOT_LEFT, CAM_S3D_PIVOT_RIGHT */
/* rotate perpendicular to the interocular line */
normalize_m4_m4(r_modelmat, camera->obmat);
mul_m4_m4m4(r_modelmat, r_modelmat, rotmat);
/* translate along the interocular line */
unit_m4(toeinmat);
toeinmat[3][0] = -interocular_distance * fac_signed;
mul_m4_m4m4(r_modelmat, r_modelmat, toeinmat);
/* rotate to toe-in angle */
mul_m4_m4m4(r_modelmat, r_modelmat, rotmat);
/* scale back to the original size */
mul_m4_m4m4(r_modelmat, r_modelmat, sizemat);
}
}
else {
normalize_m4_m4(r_modelmat, camera->obmat);
/* translate - no rotation in CAM_S3D_OFFAXIS, CAM_S3D_PARALLEL */
translate_m4(r_modelmat, -interocular_distance * fac_signed, 0.0f, 0.0f);
/* scale back to the original size */
mul_m4_m4m4(r_modelmat, r_modelmat, sizemat);
}
}
/* the view matrix is used by the viewport drawing, it is basically the inverted model matrix */
void BKE_camera_multiview_view_matrix(const RenderData *rd,
const Object *camera,
const bool is_left,
float r_viewmat[4][4])
{
BKE_camera_multiview_model_matrix(
rd, camera, is_left ? STEREO_LEFT_NAME : STEREO_RIGHT_NAME, r_viewmat);
invert_m4(r_viewmat);
}
/* left is the default */
static bool camera_is_left(const char *viewname)
{
if (viewname && viewname[0] != '\0') {
return !STREQ(viewname, STEREO_RIGHT_NAME);
}
return true;
}
void BKE_camera_multiview_model_matrix(const RenderData *rd,
const Object *camera,
const char *viewname,
float r_modelmat[4][4])
{
BKE_camera_multiview_model_matrix_scaled(rd, camera, viewname, r_modelmat);
normalize_m4(r_modelmat);
}
void BKE_camera_multiview_model_matrix_scaled(const RenderData *rd,
const Object *camera,
const char *viewname,
float r_modelmat[4][4])
{
const bool is_multiview = (rd && rd->scemode & R_MULTIVIEW) != 0;
if (!is_multiview) {
camera_model_matrix(camera, r_modelmat);
}
else if (rd->views_format == SCE_VIEWS_FORMAT_MULTIVIEW) {
camera_model_matrix(camera, r_modelmat);
}
else { /* SCE_VIEWS_SETUP_BASIC */
const bool is_left = camera_is_left(viewname);
camera_stereo3d_model_matrix(camera, is_left, r_modelmat);
}
}
void BKE_camera_multiview_window_matrix(const RenderData *rd,
const Object *camera,
const char *viewname,
float r_winmat[4][4])
{
CameraParams params;
/* Setup parameters */
BKE_camera_params_init(&params);
BKE_camera_params_from_object(&params, camera);
BKE_camera_multiview_params(rd, &params, camera, viewname);
/* Compute matrix, viewplane, .. */
BKE_camera_params_compute_viewplane(&params, rd->xsch, rd->ysch, rd->xasp, rd->yasp);
BKE_camera_params_compute_matrix(&params);
copy_m4_m4(r_winmat, params.winmat);
}
bool BKE_camera_multiview_spherical_stereo(const RenderData *rd, const Object *camera)
{
Camera *cam;
const bool is_multiview = (rd && rd->scemode & R_MULTIVIEW) != 0;
if (!is_multiview) {
return false;
}
if (camera->type != OB_CAMERA) {
return false;
}
else {
cam = camera->data;
}
if ((rd->views_format == SCE_VIEWS_FORMAT_STEREO_3D) && ELEM(cam->type, CAM_PANO, CAM_PERSP) &&
((cam->stereo.flag & CAM_S3D_SPHERICAL) != 0)) {
return true;
}
return false;
}
static Object *camera_multiview_advanced(const Scene *scene, Object *camera, const char *suffix)
{
char name[MAX_NAME];
const char *camera_name = camera->id.name + 2;
const int len_name = strlen(camera_name);
int len_suffix_max = -1;
name[0] = '\0';
/* we need to take the better match, thus the len_suffix_max test */
LISTBASE_FOREACH (const SceneRenderView *, srv, &scene->r.views) {
const int len_suffix = strlen(srv->suffix);
if ((len_suffix < len_suffix_max) || (len_name < len_suffix)) {
continue;
}
if (STREQ(camera_name + (len_name - len_suffix), srv->suffix)) {
BLI_snprintf(name, sizeof(name), "%.*s%s", (len_name - len_suffix), camera_name, suffix);
len_suffix_max = len_suffix;
}
}
if (name[0] != '\0') {
Object *ob = BKE_scene_object_find_by_name(scene, name);
if (ob != NULL) {
return ob;
}
}
return camera;
}
/* returns the camera to be used for render */
Object *BKE_camera_multiview_render(const Scene *scene, Object *camera, const char *viewname)
{
const bool is_multiview = (camera != NULL) && (scene->r.scemode & R_MULTIVIEW) != 0;
if (!is_multiview) {
return camera;
}
else if (scene->r.views_format == SCE_VIEWS_FORMAT_STEREO_3D) {
return camera;
}
else { /* SCE_VIEWS_FORMAT_MULTIVIEW */
const char *suffix = BKE_scene_multiview_view_suffix_get(&scene->r, viewname);
return camera_multiview_advanced(scene, camera, suffix);
}
}
static float camera_stereo3d_shift_x(const Object *camera, const char *viewname)
{
Camera *data = camera->data;
float shift = data->shiftx;
float interocular_distance, convergence_distance;
short convergence_mode, pivot;
bool is_left = true;
float fac = 1.0f;
float fac_signed;
if (viewname && viewname[0]) {
is_left = STREQ(viewname, STEREO_LEFT_NAME);
}
interocular_distance = data->stereo.interocular_distance;
convergence_distance = data->stereo.convergence_distance;
convergence_mode = data->stereo.convergence_mode;
pivot = data->stereo.pivot;
if (convergence_mode != CAM_S3D_OFFAXIS) {
return shift;
}
if (((pivot == CAM_S3D_PIVOT_LEFT) && is_left) || ((pivot == CAM_S3D_PIVOT_RIGHT) && !is_left)) {
return shift;
}
if (pivot == CAM_S3D_PIVOT_CENTER) {
fac = 0.5f;
}
fac_signed = is_left ? fac : -fac;
shift += ((interocular_distance / data->sensor_x) * (data->lens / convergence_distance)) *
fac_signed;
return shift;
}
float BKE_camera_multiview_shift_x(const RenderData *rd,
const Object *camera,
const char *viewname)
{
const bool is_multiview = (rd && rd->scemode & R_MULTIVIEW) != 0;
Camera *data = camera->data;
BLI_assert(camera->type == OB_CAMERA);
if (!is_multiview) {
return data->shiftx;
}
else if (rd->views_format == SCE_VIEWS_FORMAT_MULTIVIEW) {
return data->shiftx;
}
else { /* SCE_VIEWS_SETUP_BASIC */
return camera_stereo3d_shift_x(camera, viewname);
}
}
void BKE_camera_multiview_params(const RenderData *rd,
CameraParams *params,
const Object *camera,
const char *viewname)
{
if (camera->type == OB_CAMERA) {
params->shiftx = BKE_camera_multiview_shift_x(rd, camera, viewname);
}
}
CameraBGImage *BKE_camera_background_image_new(Camera *cam)
{
CameraBGImage *bgpic = MEM_callocN(sizeof(CameraBGImage), "Background Image");
bgpic->scale = 1.0f;
bgpic->alpha = 0.5f;
bgpic->iuser.ok = 1;
bgpic->iuser.flag |= IMA_ANIM_ALWAYS;
bgpic->flag |= CAM_BGIMG_FLAG_EXPANDED;
BLI_addtail(&cam->bg_images, bgpic);
return bgpic;
}
void BKE_camera_background_image_remove(Camera *cam, CameraBGImage *bgpic)
{
BLI_remlink(&cam->bg_images, bgpic);
MEM_freeN(bgpic);
}
void BKE_camera_background_image_clear(Camera *cam)
{
CameraBGImage *bgpic = cam->bg_images.first;
while (bgpic) {
CameraBGImage *next_bgpic = bgpic->next;
BKE_camera_background_image_remove(cam, bgpic);
bgpic = next_bgpic;
}
}
Reference in New Issue View Git Blame Copy Permalink