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blender-archive/source/blender/blenkernel/intern/camera.c

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/camera.c
* \ingroup bke
*/
#include <stdlib.h>
#include "DNA_camera_types.h"
#include "DNA_lamp_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_view3d_types.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BKE_animsys.h"
#include "BKE_camera.h"
#include "BKE_object.h"
#include "BKE_global.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_screen.h"
/****************************** Camera Datablock *****************************/
void *BKE_camera_add(const char *name)
{
Camera *cam;
cam = BKE_libblock_alloc(&G.main->camera, ID_CA, name);
cam->lens = 35.0f;
cam->sensor_x = 32.0f;
cam->sensor_y = 18.0f;
cam->clipsta = 0.1f;
cam->clipend = 100.0f;
cam->drawsize = 0.5f;
cam->ortho_scale = 6.0;
cam->flag |= CAM_SHOWPASSEPARTOUT;
cam->passepartalpha = 0.5f;
return cam;
}
Camera *BKE_camera_copy(Camera *cam)
{
Camera *camn;
camn = BKE_libblock_copy(&cam->id);
id_lib_extern((ID *)camn->dof_ob);
return camn;
}
void BKE_camera_make_local(Camera *cam)
{
Main *bmain = G.main;
Object *ob;
int is_local = FALSE, is_lib = FALSE;
/* - only lib users: do nothing
* - only local users: set flag
* - mixed: make copy
*/
if (cam->id.lib == NULL) return;
if (cam->id.us == 1) {
id_clear_lib_data(bmain, &cam->id);
return;
}
for (ob = bmain->object.first; ob && ELEM(0, is_lib, is_local); ob = ob->id.next) {
if (ob->data == cam) {
if (ob->id.lib) is_lib = TRUE;
else is_local = TRUE;
}
}
if (is_local && is_lib == FALSE) {
id_clear_lib_data(bmain, &cam->id);
}
else if (is_local && is_lib) {
Camera *cam_new = BKE_camera_copy(cam);
cam_new->id.us = 0;
/* Remap paths of new ID using old library as base. */
BKE_id_lib_local_paths(bmain, cam->id.lib, &cam_new->id);
for (ob = bmain->object.first; ob; ob = ob->id.next) {
if (ob->data == cam) {
if (ob->id.lib == NULL) {
ob->data = cam_new;
cam_new->id.us++;
cam->id.us--;
}
}
}
}
}
void BKE_camera_free(Camera *ca)
{
BKE_free_animdata((ID *)ca);
}
/******************************** Camera Usage *******************************/
void BKE_camera_object_mode(RenderData *rd, Object *cam_ob)
{
rd->mode &= ~(R_ORTHO | R_PANORAMA);
if (cam_ob && cam_ob->type == OB_CAMERA) {
Camera *cam = cam_ob->data;
if (cam->type == CAM_ORTHO) rd->mode |= R_ORTHO;
if (cam->type == CAM_PANO) rd->mode |= R_PANORAMA;
}
}
/* 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_ob) {
/* too simple, better to return the distance on the view axis only
* return len_v3v3(ob->obmat[3], cam->dof_ob->obmat[3]); */
float mat[4][4], imat[4][4], obmat[4][4];
copy_m4_m4(obmat, ob->obmat);
normalize_m4(obmat);
invert_m4_m4(imat, obmat);
mult_m4_m4m4(mat, imat, cam->dof_ob->obmat);
return fabsf(mat[3][2]);
}
return cam->YF_dofdist;
}
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;
}
void BKE_camera_params_from_object(CameraParams *params, 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->clipsta = cam->clipsta;
params->clipend = cam->clipend;
}
else if (ob->type == OB_LAMP) {
/* lamp object */
Lamp *la = ob->data;
float fac = cosf((float)M_PI * la->spotsize / 360.0f);
float phi = acos(fac);
params->lens = 16.0f * fac / sinf(phi);
if (params->lens == 0.0f)
params->lens = 35.0f;
params->clipsta = la->clipsta;
params->clipend = la->clipend;
}
}
void BKE_camera_params_from_view3d(CameraParams *params, View3D *v3d, RegionView3D *rv3d)
{
/* common */
params->lens = v3d->lens;
params->clipsta = v3d->near;
params->clipend = v3d->far;
if (rv3d->persp == RV3D_CAMOB) {
/* camera view */
BKE_camera_params_from_object(params, v3d->camera);
params->zoom = BKE_screen_view3d_zoom_to_fac((float)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 = 1.0f / params->zoom;
}
else if (rv3d->persp == RV3D_ORTHO) {
/* orthographic view */
params->clipend *= 0.5f; // otherwise too extreme low zbuffer quality
params->clipsta = -params->clipend;
params->is_ortho = TRUE;
params->ortho_scale = rv3d->dist;
params->zoom = 2.0f;
}
else {
/* perspective view */
params->zoom = 2.0f;
}
}
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;
/* fields rendering */
params->ycor = yasp / xasp;
if (params->use_fields)
params->ycor *= 2.0f;
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->clipsta) / 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;
/* fields offset */
if (params->field_second) {
if (params->field_odd) {
viewplane.ymin -= 0.5f * params->ycor;
viewplane.ymax -= 0.5f * params->ycor;
}
else {
viewplane.ymin += 0.5f * params->ycor;
viewplane.ymax += 0.5f * params->ycor;
}
}
/* 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;
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->clipsta, params->clipend);
else
perspective_m4(params->winmat, viewplane.xmin, viewplane.xmax,
viewplane.ymin, viewplane.ymax, params->clipsta, params->clipend);
}
/***************************** Camera View Frame *****************************/
void BKE_camera_view_frame_ex(Scene *scene, Camera *camera, float drawsize, const short 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 correcton */
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 = do_clip ? -((camera->clipsta * scale[2]) + 0.1f) : -drawsize * camera->ortho_scale * scale[2];
*r_drawsize = 0.5f * camera->ortho_scale;
}
else {
/* that way it's always visible - clipsta+0.1 */
float fac;
float half_sensor = 0.5f * ((camera->sensor_fit == CAMERA_SENSOR_FIT_VERT) ? (camera->sensor_y) : (camera->sensor_x));
*r_drawsize = drawsize / ((scale[0] + scale[1] + scale[2]) / 3.0f);
if (do_clip) {
/* fixed depth, variable size (avoids exceeding clipping range) */
depth = -(camera->clipsta + 0.1f);
fac = depth / (camera->lens / (-half_sensor) * scale[2]);
}
else {
/* fixed size, variable depth (stays a reasonable size in the 3D view) */
depth = *r_drawsize * camera->lens / (-half_sensor) * scale[2];
fac = *r_drawsize;
}
facx = fac * r_asp[0] * scale[0];
facy = fac * r_asp[1] * scale[1];
r_shift[0] = camera->shiftx * fac * 2 * scale[0];
r_shift[1] = camera->shifty * fac * 2 * scale[1];
}
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;
}
void BKE_camera_view_frame(Scene *scene, 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, FALSE, 1.0, dummy_scale,
dummy_asp, dummy_shift, &dummy_drawsize, r_vec);
}
typedef struct CameraViewFrameData {
float frame_tx[4][3];
float normal_tx[4][3];
float dist_vals[4];
unsigned int tot;
} CameraViewFrameData;
static void BKE_camera_to_frame_view_cb(const float co[3], void *user_data)
{
CameraViewFrameData *data = (CameraViewFrameData *)user_data;
unsigned int i;
for (i = 0; i < 4; i++) {
float nd = dist_to_plane_v3(co, data->frame_tx[i], data->normal_tx[i]);
if (nd < data->dist_vals[i]) {
data->dist_vals[i] = nd;
}
}
data->tot++;
}
/* don't move the camera, just yield the fit location */
/* only valid for perspective cameras */
int BKE_camera_view_frame_fit_to_scene(Scene *scene, struct View3D *v3d, Object *camera_ob, float r_co[3])
{
float shift[2];
float plane_tx[4][3];
float rot_obmat[3][3];
const float zero[3] = {0, 0, 0};
CameraViewFrameData data_cb;
unsigned int i;
BKE_camera_view_frame(scene, camera_ob->data, data_cb.frame_tx);
copy_m3_m4(rot_obmat, camera_ob->obmat);
normalize_m3(rot_obmat);
for (i = 0; i < 4; i++) {
/* normalize so Z is always 1.0f*/
mul_v3_fl(data_cb.frame_tx[i], 1.0f / data_cb.frame_tx[i][2]);
}
/* get the shift back out of the frame */
shift[0] = (data_cb.frame_tx[0][0] +
data_cb.frame_tx[1][0] +
data_cb.frame_tx[2][0] +
data_cb.frame_tx[3][0]) / 4.0f;
shift[1] = (data_cb.frame_tx[0][1] +
data_cb.frame_tx[1][1] +
data_cb.frame_tx[2][1] +
data_cb.frame_tx[3][1]) / 4.0f;
for (i = 0; i < 4; i++) {
mul_m3_v3(rot_obmat, data_cb.frame_tx[i]);
}
for (i = 0; i < 4; i++) {
normal_tri_v3(data_cb.normal_tx[i],
zero, data_cb.frame_tx[i], data_cb.frame_tx[(i + 1) % 4]);
}
/* initialize callback data */
data_cb.dist_vals[0] =
data_cb.dist_vals[1] =
data_cb.dist_vals[2] =
data_cb.dist_vals[3] = FLT_MAX;
data_cb.tot = 0;
/* run callback on all visible points */
BKE_scene_foreach_display_point(scene, v3d, BA_SELECT,
BKE_camera_to_frame_view_cb, &data_cb);
if (data_cb.tot <= 1) {
return FALSE;
}
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 < 4; i++) {
mul_v3_v3fl(plane_tx[i], data_cb.normal_tx[i], data_cb.dist_vals[i]);
}
isect_plane_plane_v3(plane_isect_1, plane_isect_1_no,
plane_tx[0], data_cb.normal_tx[0],
plane_tx[2], data_cb.normal_tx[2]);
isect_plane_plane_v3(plane_isect_2, plane_isect_2_no,
plane_tx[1], data_cb.normal_tx[1],
plane_tx[3], data_cb.normal_tx[3]);
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)
{
return FALSE;
}
else {
float cam_plane_no[3] = {0.0f, 0.0f, -1.0f};
float plane_isect_delta[3];
float plane_isect_delta_len;
mul_m3_v3(rot_obmat, cam_plane_no);
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, shift[1] * -plane_isect_delta_len);
}
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, shift[0] * -plane_isect_delta_len);
}
return TRUE;
}
}
}
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