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Another solution to bug T38358 and related

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Moving the ray_start_local to the new position does not lose as much precision as moving the ray_org_local to the corresponding position.

The problem of inaccuracy is within the functions: `bvhtree_ray_cast_data_precalc` and` fast_ray_nearest_hit`. And not directly in the values of the rays.
This commit is contained in:
mano-wii 2017-07-21 14:02:16 -03:00
parent 11204fce4e
commit 34f0250f32
1 changed files with 12 additions and 31 deletions
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43
source/blender/editors/transform/transform_snap_object.c
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@ -365,7 +365,7 @@ static void raycast_all_cb(void *userdata, int index, const BVHTreeRay *ray, BVH
static bool raycastDerivedMesh(
SnapObjectContext *sctx,
const float ray_orig[3], const float ray_start[3], const float ray_dir[3], const float depth_range[2],
const float ray_orig[3], const float ray_start[3], const float ray_dir[3],
Object *ob, DerivedMesh *dm, float obmat[4][4], const unsigned int ob_index,
/* read/write args */
float *ray_depth,
@ -483,18 +483,11 @@ static bool raycastDerivedMesh(
* because even in the Orthografic view, in some cases,
* the ray can start inside the object (see T50486) */
if (len_diff > 400.0f) {
float ray_org_local[3];
copy_v3_v3(ray_org_local, ray_orig);
mul_m4_v3(imat, ray_org_local);
/* We pass a temp ray_start, set from object's boundbox, to avoid precision issues with
* very far away ray_start values (as returned in case of ortho view3d), see T38358.
*/
len_diff -= local_scale; /* make temp start point a bit away from bbox hit point. */
madd_v3_v3v3fl(
ray_start_local, ray_org_local, ray_normal_local,
len_diff + depth_range[0] * local_scale);
madd_v3_v3fl(ray_start_local, ray_normal_local, len_diff);
local_depth -= len_diff;
}
else {
@ -556,7 +549,7 @@ static bool raycastDerivedMesh(
static bool raycastEditMesh(
SnapObjectContext *sctx,
const float ray_orig[3], const float ray_start[3], const float ray_dir[3], const float depth_range[2],
const float ray_orig[3], const float ray_start[3], const float ray_dir[3],
Object *ob, BMEditMesh *em, float obmat[4][4], const unsigned int ob_index,
/* read/write args */
float *ray_depth,
@ -646,18 +639,11 @@ static bool raycastEditMesh(
* because even in the Orthografic view, in some cases,
* the ray can start inside the object (see T50486) */
if (len_diff > 400.0f) {
float ray_org_local[3];
copy_v3_v3(ray_org_local, ray_orig);
mul_m4_v3(imat, ray_org_local);
/* We pass a temp ray_start, set from object's boundbox, to avoid precision issues with
* very far away ray_start values (as returned in case of ortho view3d), see T38358.
*/
len_diff -= local_scale; /* make temp start point a bit away from bbox hit point. */
madd_v3_v3v3fl(
ray_start_local, ray_org_local, ray_normal_local,
len_diff + depth_range[0] * local_scale);
madd_v3_v3fl(ray_start_local, ray_normal_local, len_diff);
local_depth -= len_diff;
}
else len_diff = 0.0f;
@ -724,7 +710,7 @@ static bool raycastEditMesh(
*/
static bool raycastObj(
SnapObjectContext *sctx,
const float ray_orig[3], const float ray_start[3], const float ray_dir[3], const float depth_range[2],
const float ray_orig[3], const float ray_start[3], const float ray_dir[3],
Object *ob, float obmat[4][4], const unsigned int ob_index,
bool use_obedit,
/* read/write args */
@ -743,7 +729,7 @@ static bool raycastObj(
em = BKE_editmesh_from_object(ob);
retval = raycastEditMesh(
sctx,
ray_orig, ray_start, ray_dir, depth_range,
ray_orig, ray_start, ray_dir,
ob, em, obmat, ob_index,
ray_depth, r_loc, r_no, r_index, r_hit_list);
}
@ -760,7 +746,7 @@ static bool raycastObj(
}
retval = raycastDerivedMesh(
sctx,
ray_orig, ray_start, ray_dir, depth_range,
ray_orig, ray_start, ray_dir,
ob, dm, obmat, ob_index,
ray_depth, r_loc, r_no, r_index, r_hit_list);
@ -783,7 +769,6 @@ struct RaycastObjUserData {
const float *ray_orig;
const float *ray_start;
const float *ray_dir;
const float *depth_range;
unsigned int ob_index;
/* read/write args */
float *ray_depth;
@ -802,7 +787,7 @@ static void raycast_obj_cb(SnapObjectContext *sctx, bool is_obedit, Object *ob,
struct RaycastObjUserData *dt = data;
dt->ret |= raycastObj(
sctx,
dt->ray_orig, dt->ray_start, dt->ray_dir, dt->depth_range,
dt->ray_orig, dt->ray_start, dt->ray_dir,
ob, obmat, dt->ob_index++, is_obedit,
dt->ray_depth,
dt->r_loc, dt->r_no, dt->r_index,
@ -841,7 +826,7 @@ static void raycast_obj_cb(SnapObjectContext *sctx, bool is_obedit, Object *ob,
*/
static bool raycastObjects(
SnapObjectContext *sctx,
const float ray_orig[3], const float ray_start[3], const float ray_dir[3], const float depth_range[2],
const float ray_orig[3], const float ray_start[3], const float ray_dir[3],
const SnapSelect snap_select, const bool use_object_edit_cage,
/* read/write args */
float *ray_depth,
@ -856,7 +841,6 @@ static bool raycastObjects(
.ray_orig = ray_orig,
.ray_start = ray_start,
.ray_dir = ray_dir,
.depth_range = depth_range,
.ob_index = 0,
.ray_depth = ray_depth,
.r_loc = r_loc,
@ -2221,11 +2205,9 @@ bool ED_transform_snap_object_project_ray_ex(
float r_loc[3], float r_no[3], int *r_index,
Object **r_ob, float r_obmat[4][4])
{
const float depth_range[2] = {0.0f, FLT_MAX};
return raycastObjects(
sctx,
ray_start, ray_start, ray_normal, depth_range,
ray_start, ray_start, ray_normal,
params->snap_select, params->use_object_edit_cage,
ray_depth, r_loc, r_no, r_index, r_ob, r_obmat, NULL);
}
@ -2244,7 +2226,6 @@ bool ED_transform_snap_object_project_ray_all(
float ray_depth, bool sort,
ListBase *r_hit_list)
{
const float depth_range[2] = {0.0f, FLT_MAX};
if (ray_depth == -1.0f) {
ray_depth = BVH_RAYCAST_DIST_MAX;
}
@ -2255,7 +2236,7 @@ bool ED_transform_snap_object_project_ray_all(
bool retval = raycastObjects(
sctx,
ray_start, ray_start, ray_normal, depth_range,
ray_start, ray_start, ray_normal,
params->snap_select, params->use_object_edit_cage,
&ray_depth, NULL, NULL, NULL, NULL, NULL,
r_hit_list);
@ -2438,7 +2419,7 @@ bool ED_transform_snap_object_project_view3d_ex(
if (snap_to == SCE_SNAP_MODE_FACE) {
return raycastObjects(
sctx,
ray_origin, ray_start, ray_normal, depth_range,
ray_origin, ray_start, ray_normal,
params->snap_select, params->use_object_edit_cage,
ray_depth, r_loc, r_no, r_index, NULL, NULL, NULL);
}