void rna_camera_view_frame(struct Camera *camera, struct Scene *scene,
float vec1_r[3], float vec2_r[3], float vec3_r[3], float vec4_r[3])
{
float vec[4][3];
BKE_camera_view_frame(scene, camera, vec);
copy_v3_v3(vec1_r, vec[0]);
copy_v3_v3(vec2_r, vec[1]);
copy_v3_v3(vec3_r, vec[2]);
copy_v3_v3(vec4_r, vec[3]);
}
/* only valid for perspective cameras */
bool 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]);
plane_from_point_normal_v3(data_cb.plane_tx[i], data_cb.frame_tx[i], data_cb.normal_tx[i]);
}
/* initialize callback data */
copy_v4_fl(data_cb.dist_vals_sq, FLT_MAX);
data_cb.tot = 0;
/* run callback on all visible points */
BKE_scene_foreach_display_point(scene, v3d, BA_SELECT,
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], sqrtf_signed(data_cb.dist_vals_sq[i]));
}
if ((!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])))
{
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)
{
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;
}
}
}
