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GPv3: Initial modifier support #110500

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Falk David merged 3 commits from filedescriptor/blender:gpv3-initial-modifier-support into main 2023-07-28 14:25:47 +02:00
Conversation 0 Commits 3 Files Changed 4 +67 -7
Falk David commented 2023-07-26 16:47:04 +02:00
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This commit adds modifier support for Grease Pencil 3.
The BKE_grease_pencil_data_update function evaluates the modifiers by
first creating a GeometrySet from the grease pencil data,
then evaluating the modifiers, and finally reading the
resulting GreasePencilComponent component and assigning
the evaluated object data.

This commit adds modifier support for Grease Pencil 3. The `BKE_grease_pencil_data_update` function evaluates the modifiers by first creating a `GeometrySet` from the grease pencil data, then evaluating the modifiers, and finally reading the resulting `GreasePencilComponent` component and assigning the evaluated object data.
Falk David added this to the Grease Pencil project 2023-07-26 16:51:08 +02:00
Falk David requested review from Jacques Lucke 2023-07-26 16:51:20 +02:00
Hans Goudey requested changes 2023-07-27 14:18:25 +02:00
Hans Goudey left a comment
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Great how simple the modifier stack can be without all the legacy stuff going on :)

Great how simple the modifier stack can be without all the legacy stuff going on :)
source/blender/blenkernel/intern/grease_pencil.cc Outdated
@ -1076,1 +1084,4 @@
blender::bke::GeometrySet &geometry_set)
{
/* Modifier evaluation modes. */
const bool use_render = (DEG_get_mode(depsgraph) == DAG_EVAL_RENDER);
Hans Goudey commented 2023-07-27 14:18:01 +02:00
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Picky, but these parentheses don't really help IMO

Picky, but these parentheses don't really help IMO
filedescriptor marked this conversation as resolved
source/blender/blenkernel/intern/grease_pencil.cc Outdated
@ -1076,1 +1085,4 @@
{
/* Modifier evaluation modes. */
const bool use_render = (DEG_get_mode(depsgraph) == DAG_EVAL_RENDER);
int required_mode = use_render ? eModifierMode_Render : eModifierMode_Realtime;
Hans Goudey commented 2023-07-27 14:17:44 +02:00
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Can you use the proper enum type for this variable?

Can you use the proper enum type for this variable?
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source/blender/blenkernel/intern/grease_pencil.cc Outdated
@ -1077,0 +1087,4 @@
const bool use_render = (DEG_get_mode(depsgraph) == DAG_EVAL_RENDER);
int required_mode = use_render ? eModifierMode_Render : eModifierMode_Realtime;
if (BKE_object_is_in_editmode(object)) {
required_mode = (ModifierMode)(int(required_mode) | eModifierMode_Editmode);
Hans Goudey commented 2023-07-27 14:17:27 +02:00
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This enum has ENUM_OPERATORS now, this casting shouldn't be necessary

This enum has `ENUM_OPERATORS` now, this casting shouldn't be necessary
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source/blender/blenkernel/intern/grease_pencil.cc Outdated
@ -1077,0 +1101,4 @@
/* Evaluate modifiers. */
for (; md; md = md->next) {
const ModifierTypeInfo *mti = BKE_modifier_get_info(static_cast<ModifierType>(md->type));
Hans Goudey commented 2023-07-27 14:16:58 +02:00
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Use functional style cast for enum types

Use functional style cast for enum types
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source/blender/blenkernel/intern/grease_pencil.cc Outdated
@ -1083,2 +1125,4 @@
grease_pencil, GeometryOwnershipType::ReadOnly);
grease_pencil_evaluate_modifiers(depsgraph, scene, object, geometry_set);
/* Assign evaluated object. */
Hans Goudey commented 2023-07-27 14:16:36 +02:00
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Maybe reference the explanation for the const cast from another object type, since otherwise this raises some eyebrows

Maybe reference the explanation for the const cast from another object type, since otherwise this raises some eyebrows
filedescriptor marked this conversation as resolved
Falk David force-pushed gpv3-initial-modifier-support from cf37700e66 to 4d5f674205 2023-07-27 15:38:39 +02:00 Compare
Hans Goudey approved these changes 2023-07-27 15:42:20 +02:00
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Looks good, left one suggestion to simplify things inline

Looks good, left one suggestion to simplify things inline
source/blender/blenkernel/intern/grease_pencil.cc Outdated
@ -1086,3 +1133,1 @@
GreasePencil *grease_pencil_eval = reinterpret_cast<GreasePencil *>(
BKE_id_copy_ex(nullptr, &grease_pencil->id, nullptr, LIB_ID_COPY_LOCALIZE));
BKE_object_eval_assign_data(object, &grease_pencil_eval->id, true);
if (grease_pencil_eval == nullptr) {
Hans Goudey commented 2023-07-27 15:41:55 +02:00
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To make the geometry_set_eval and data_eval consistent, this second call to BKE_object_eval_assign_data could be replaced with:

if (!geometry_set.has_grease_pencil()) {
  geometry_set.replace_grease_pencil(BKE_grease_pencil_new_nomain());
}

Eventually it would be nice to remove data_eval completely for geometry object types, that gets us a bit closer.

To make the `geometry_set_eval` and `data_eval` consistent, this second call to `BKE_object_eval_assign_data` could be replaced with: ``` if (!geometry_set.has_grease_pencil()) { geometry_set.replace_grease_pencil(BKE_grease_pencil_new_nomain()); } ``` Eventually it would be nice to remove `data_eval` completely for geometry object types, that gets us a bit closer.
Falk David commented 2023-07-27 15:51:33 +02:00
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Do you mean the first call to BKE_object_eval_assign_data?
Wouldn't that mean that for the object we only change object->runtime.geometry_set_eval and not the other things that BKE_object_eval_assign_data changes?

Do you mean the first call to `BKE_object_eval_assign_data`? Wouldn't that mean that for the `object` we only change `object->runtime.geometry_set_eval` and not the other things that `BKE_object_eval_assign_data` changes?
Hans Goudey commented 2023-07-27 15:54:51 +02:00
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Yeah, like this:

if (!geometry_set.has_grease_pencil()) {
  geometry_set.replace_grease_pencil(BKE_grease_pencil_new_nomain());
}

GreasePencil *grease_pencil_eval = const_cast<GreasePencil *>(
    geometry_set.get_grease_pencil_for_read());
BKE_object_eval_assign_data(object, &grease_pencil_eval->id, false);

object->runtime.geometry_set_eval = new GeometrySet(std::move(geometry_set));
Yeah, like this: ``` if (!geometry_set.has_grease_pencil()) { geometry_set.replace_grease_pencil(BKE_grease_pencil_new_nomain()); } GreasePencil *grease_pencil_eval = const_cast<GreasePencil *>( geometry_set.get_grease_pencil_for_read()); BKE_object_eval_assign_data(object, &grease_pencil_eval->id, false); object->runtime.geometry_set_eval = new GeometrySet(std::move(geometry_set)); ```
filedescriptor marked this conversation as resolved
Falk David added 1 commit 2023-07-27 16:21:42 +02:00
Hans Goudey approved these changes 2023-07-27 16:35:04 +02:00
Jacques Lucke approved these changes 2023-07-28 13:42:51 +02:00
Falk David merged commit 20b1077097 into main 2023-07-28 14:25:47 +02:00
Falk David deleted branch gpv3-initial-modifier-support 2023-07-28 14:25:50 +02:00
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