/**
* \param r_distance Distance to the hit point
*/
static bool walk_floor_distance_get(bContext *C, RegionView3D *rv3d, WalkInfo *walk, const float dvec[3], float *r_distance)
{
float dummy_dist_px = 0;
float ray_normal[3] = {0, 0, -1}; /* down */
float ray_start[3];
float r_location[3];
float r_normal[3];
float dvec_tmp[3];
bool ret;
*r_distance = TRANSFORM_DIST_MAX_RAY;
copy_v3_v3(ray_start, rv3d->viewinv[3]);
mul_v3_v3fl(dvec_tmp, dvec, walk->grid);
add_v3_v3(ray_start, dvec_tmp);
ret = snapObjectsRayEx(CTX_data_scene(C), NULL, NULL, NULL, NULL, SCE_SNAP_MODE_FACE,
NULL, NULL,
ray_start, ray_normal, r_distance,
NULL, &dummy_dist_px, r_location, r_normal, SNAP_ALL);
/* artifically scale the distance to the scene size */
*r_distance /= walk->grid;
return ret;
}
/**
* \param ray_distance Distance to the hit point
* \param r_location Location of the hit point
* \param r_normal Normal of the hit surface, transformed to always face the camera
*/
static bool walk_ray_cast(bContext *C, RegionView3D *rv3d, WalkInfo *walk, float r_location[3], float r_normal[3], float *ray_distance)
{
float dummy_dist_px = 0;
float ray_normal[3] = {0, 0, 1}; /* forward */
float ray_start[3];
float mat[3][3]; /* 3x3 copy of the view matrix so we can move along the view axis */
bool ret;
*ray_distance = TRANSFORM_DIST_MAX_RAY;
copy_v3_v3(ray_start, rv3d->viewinv[3]);
copy_m3_m4(mat, rv3d->viewinv);
mul_m3_v3(mat, ray_normal);
mul_v3_fl(ray_normal, -1);
normalize_v3(ray_normal);
ret = snapObjectsRayEx(CTX_data_scene(C), NULL, NULL, NULL, NULL, SCE_SNAP_MODE_FACE,
NULL, NULL,
ray_start, ray_normal, ray_distance,
NULL, &dummy_dist_px, r_location, r_normal, SNAP_ALL);
/* dot is positive if both rays are facing the same direction */
if (dot_v3v3(ray_normal, r_normal) > 0) {
copy_v3_fl3(r_normal, -r_normal[0], -r_normal[1], -r_normal[2]);
}
/* artifically scale the distance to the scene size */
*ray_distance /= walk->grid;
return ret;
}
static void rna_Scene_ray_cast(Scene *scene, float ray_start[3], float ray_end[3],
int *r_success, Object **r_ob, float r_obmat[16],
float r_location[3], float r_normal[3])
{
float dummy_dist_px = 0;
float ray_nor[3];
float ray_dist;
sub_v3_v3v3(ray_nor, ray_end, ray_start);
ray_dist = normalize_v3(ray_nor);
if (snapObjectsRayEx(scene, NULL, NULL, NULL, NULL, SCE_SNAP_MODE_FACE,
r_ob, (float(*)[4])r_obmat,
ray_start, ray_nor, &ray_dist,
NULL, &dummy_dist_px, r_location, r_normal, SNAP_ALL))
{
*r_success = true;
}
else {
unit_m4((float(*)[4])r_obmat);
zero_v3(r_location);
zero_v3(r_normal);
*r_success = false;
}
}
static bool ED_view3d_snap_ray(bContext *C, float r_co[3],
const float ray_start[3], const float ray_normal[3])
{
float dist_px = MVAL_MAX_PX_DIST; /* snap dist */
float r_no_dummy[3];
float ray_dist = TRANSFORM_DIST_MAX_RAY;
bool ret;
Scene *scene = CTX_data_scene(C);
struct Object *obedit = CTX_data_edit_object(C);
/* try snap edge, then face if it fails */
ret = snapObjectsRayEx(scene, NULL, NULL, NULL, obedit, SCE_SNAP_MODE_FACE,
NULL, NULL,
ray_start, ray_normal, &ray_dist,
NULL, &dist_px, r_co, r_no_dummy, SNAP_ALL);
return ret;
}