diff options
Diffstat (limited to 'source')
-rw-r--r-- | source/blender/blenkernel/BKE_paint.h | 5 | ||||
-rw-r--r-- | source/blender/editors/sculpt_paint/sculpt_cloth.c | 68 |
2 files changed, 66 insertions, 7 deletions
diff --git a/source/blender/blenkernel/BKE_paint.h b/source/blender/blenkernel/BKE_paint.h index a84fb258330..382919147f8 100644 --- a/source/blender/blenkernel/BKE_paint.h +++ b/source/blender/blenkernel/BKE_paint.h @@ -283,6 +283,11 @@ typedef struct SculptClothSimulation { int capacity_length_constraints; float *length_constraint_tweak; + /* Position anchors for deformation brushes. These positions are modified by the brush and the + * final positions of the simulated vertices are updated with constraints that use these points + * as targets. */ + float (*deformation_pos)[3]; + float mass; float damping; diff --git a/source/blender/editors/sculpt_paint/sculpt_cloth.c b/source/blender/editors/sculpt_paint/sculpt_cloth.c index 763a765768f..a8465ef9454 100644 --- a/source/blender/editors/sculpt_paint/sculpt_cloth.c +++ b/source/blender/editors/sculpt_paint/sculpt_cloth.c @@ -179,6 +179,28 @@ static void cloth_brush_add_softbody_constraint(SculptClothSimulation *cloth_sim cloth_brush_reallocate_constraints(cloth_sim); } +static void cloth_brush_add_deformation_constraint(SculptClothSimulation *cloth_sim, + const int v, + const float strength) +{ + SculptClothLengthConstraint *length_constraint = + &cloth_sim->length_constraints[cloth_sim->tot_length_constraints]; + + length_constraint->elem_index_a = v; + length_constraint->elem_index_b = v; + + length_constraint->elem_position_a = cloth_sim->pos[v]; + length_constraint->elem_position_b = cloth_sim->deformation_pos[v]; + + length_constraint->length = 0.0f; + length_constraint->strength = strength; + + cloth_sim->tot_length_constraints++; + + /* Reallocation if the array capacity is exceeded. */ + cloth_brush_reallocate_constraints(cloth_sim); +} + static void do_cloth_brush_build_constraints_task_cb_ex( void *__restrict userdata, const int n, const TaskParallelTLS *__restrict UNUSED(tls)) { @@ -190,10 +212,21 @@ static void do_cloth_brush_build_constraints_task_cb_ex( const bool use_persistent = brush != NULL && brush->flag & BRUSH_PERSISTENT; + /* Brush can be NULL in tools that use the solver without relying of constraints with deformation + * positions. */ + const bool cloth_is_deform_brush = ss->cache != NULL && brush != NULL && + SCULPT_is_cloth_deform_brush(brush); + float radius_squared = 0.0f; + if (cloth_is_deform_brush) { + radius_squared = ss->cache->initial_radius * ss->cache->initial_radius; + } + + const float cloth_sim_radius_squared = data->cloth_sim_radius * data->cloth_sim_radius; + BKE_pbvh_vertex_iter_begin(ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE) { - if (len_squared_v3v3(vd.co, data->cloth_sim_initial_location) < - data->cloth_sim_radius * data->cloth_sim_radius) { + const float len_squared = len_squared_v3v3(vd.co, data->cloth_sim_initial_location); + if (len_squared < cloth_sim_radius_squared) { SculptVertexNeighborIter ni; int build_indices[CLOTH_MAX_CONSTRAINTS_PER_VERTEX]; @@ -226,6 +259,11 @@ static void do_cloth_brush_build_constraints_task_cb_ex( } } } + + if (cloth_is_deform_brush && len_squared < radius_squared) { + const float fade = BKE_brush_curve_strength(brush, sqrtf(len_squared), ss->cache->radius); + cloth_brush_add_deformation_constraint(data->cloth_sim, vd.index, fade); + } } BKE_pbvh_vertex_iter_end; } @@ -372,9 +410,10 @@ static void do_cloth_brush_apply_forces_task_cb_ex(void *__restrict userdata, mul_v3_v3fl(force, offset, -fade); break; case BRUSH_CLOTH_DEFORM_GRAB: - /* Grab writes the positions in the simulation directly without applying forces. */ - madd_v3_v3v3fl( - cloth_sim->pos[vd.index], orig_data.co, ss->cache->grab_delta_symmetry, fade); + madd_v3_v3v3fl(cloth_sim->deformation_pos[vd.index], + orig_data.co, + ss->cache->grab_delta_symmetry, + fade); zero_v3(force); break; case BRUSH_CLOTH_DEFORM_PINCH_POINT: @@ -416,6 +455,7 @@ static void do_cloth_brush_apply_forces_task_cb_ex(void *__restrict userdata, } static SculptClothSimulation *cloth_brush_simulation_create(SculptSession *ss, + Brush *brush, const float cloth_mass, const float cloth_damping) { @@ -436,6 +476,13 @@ static SculptClothSimulation *cloth_brush_simulation_create(SculptSession *ss, cloth_sim->length_constraint_tweak = MEM_callocN(sizeof(float) * totverts, "cloth sim length tweak"); + /* Brush can be NULL for tools that neeed the solver but don't rely on constraint to deformation + * positions. */ + if (brush && SCULPT_is_cloth_deform_brush(brush)) { + cloth_sim->deformation_pos = MEM_calloc_arrayN( + totverts, 3 * sizeof(float), "cloth sim deformation positions"); + } + cloth_sim->mass = cloth_mass; cloth_sim->damping = cloth_damping; @@ -704,10 +751,16 @@ void SCULPT_do_cloth_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode /* The simulation structure only needs to be created on the first symmetry pass. */ if (SCULPT_stroke_is_first_brush_step(ss->cache) || !ss->cache->cloth_sim) { ss->cache->cloth_sim = cloth_brush_simulation_create( - ss, brush->cloth_mass, brush->cloth_damping); + ss, brush, brush->cloth_mass, brush->cloth_damping); + + const bool is_cloth_deform_brush = SCULPT_is_cloth_deform_brush(brush); + for (int i = 0; i < totverts; i++) { copy_v3_v3(ss->cache->cloth_sim->prev_pos[i], SCULPT_vertex_co_get(ss, i)); copy_v3_v3(ss->cache->cloth_sim->init_pos[i], SCULPT_vertex_co_get(ss, i)); + if (is_cloth_deform_brush) { + copy_v3_v3(ss->cache->cloth_sim->deformation_pos[i], SCULPT_vertex_co_get(ss, i)); + } } } @@ -739,6 +792,7 @@ void SCULPT_cloth_simulation_free(struct SculptClothSimulation *cloth_sim) MEM_SAFE_FREE(cloth_sim->acceleration); MEM_SAFE_FREE(cloth_sim->length_constraints); MEM_SAFE_FREE(cloth_sim->length_constraint_tweak); + MEM_SAFE_FREE(cloth_sim->deformation_pos); MEM_SAFE_FREE(cloth_sim->init_pos); MEM_SAFE_FREE(cloth_sim); } @@ -968,7 +1022,7 @@ static int sculpt_cloth_filter_invoke(bContext *C, wmOperator *op, const wmEvent const float cloth_mass = RNA_float_get(op->ptr, "cloth_mass"); const float cloth_damping = RNA_float_get(op->ptr, "cloth_damping"); - ss->filter_cache->cloth_sim = cloth_brush_simulation_create(ss, cloth_mass, cloth_damping); + ss->filter_cache->cloth_sim = cloth_brush_simulation_create(ss, NULL, cloth_mass, cloth_damping); copy_v3_v3(ss->filter_cache->cloth_sim_pinch_point, SCULPT_active_vertex_co_get(ss)); const int totverts = SCULPT_vertex_count_get(ss); |