Differential D1903 Diff 6399 source/blender/blenkernel/intern/cloth.c

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source/blender/blenkernel/intern/cloth.c

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	static void cloth_from_mesh ( ClothModifierData clmd, DerivedMesh dm );	static void cloth_from_mesh ( ClothModifierData clmd, DerivedMesh dm );
	static int cloth_from_object(Object ob, ClothModifierData clmd, DerivedMesh *dm, float framenr, int first);	static int cloth_from_object(Object ob, ClothModifierData clmd, DerivedMesh *dm, float framenr, int first);
	static void cloth_update_springs( ClothModifierData *clmd );	static void cloth_update_springs( ClothModifierData *clmd );
		static void cloth_update_verts( Object ob, ClothModifierData clmd, DerivedMesh *dm );
		static void cloth_update_spring_lengths( ClothModifierData clmd, DerivedMesh dm );
	static int cloth_build_springs ( ClothModifierData clmd, DerivedMesh dm );	static int cloth_build_springs ( ClothModifierData clmd, DerivedMesh dm );
	static void cloth_apply_vgroup ( ClothModifierData clmd, DerivedMesh dm );	static void cloth_apply_vgroup ( ClothModifierData clmd, DerivedMesh dm );

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	effectors = pdInitEffectors(clmd->scene, ob, NULL, clmd->sim_parms->effector_weights, true);	effectors = pdInitEffectors(clmd->scene, ob, NULL, clmd->sim_parms->effector_weights, true);

		if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH )
		cloth_update_verts ( ob, clmd, result );

	/* Support for dynamic vertex groups, changing from frame to frame */	/* Support for dynamic vertex groups, changing from frame to frame */
	cloth_apply_vgroup ( clmd, result );	cloth_apply_vgroup ( clmd, result );

		if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH )
		cloth_update_spring_lengths ( clmd, result );

	cloth_update_springs( clmd );	cloth_update_springs( clmd );

	// TIMEIT_START(cloth_step)	// TIMEIT_START(cloth_step)
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	clmd->clothObject->springs = NULL;	clmd->clothObject->springs = NULL;
	clmd->clothObject->numsprings = -1;	clmd->clothObject->numsprings = -1;

	if ( clmd->sim_parms->shapekey_rest )	if ( clmd->sim_parms->shapekey_rest && !(clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH ) )
	shapekey_rest = dm->getVertDataArray ( dm, CD_CLOTH_ORCO );	shapekey_rest = dm->getVertDataArray ( dm, CD_CLOTH_ORCO );

	mvert = dm->getVertArray (dm);	mvert = dm->getVertArray (dm);
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	cloth_hair_update_bending_targets(clmd);	cloth_hair_update_bending_targets(clmd);
	}	}

		/* Update rest verts, for dynamically deformable cloth */
		static void cloth_update_verts( Object ob, ClothModifierData clmd, DerivedMesh *dm )
		{
		unsigned int i = 0;
		MVert *mvert = dm->getVertArray (dm);
		ClothVertex *verts = clmd->clothObject->verts;

		for ( i = 0; i < dm->getNumVerts(dm); i++, verts++ ) {
		verts->xrest = mvert[i].co;
		mul_m4_v3(ob->obmat, verts->xrest);
		}
		}

		/* Update spring rest lenght, for dynamically deformable cloth */
		static void cloth_update_spring_lengths( ClothModifierData clmd, DerivedMesh dm )
		{
		Cloth *cloth = clmd->clothObject;
		LinkNode *search = cloth->springs;
		unsigned int struct_springs = 0;
		unsigned int i = 0;
		unsigned int mvert_num = (unsigned int)dm->getNumVerts(dm);
		float shrink_factor;

		clmd->sim_parms->avg_spring_len = 0.0f;

		for (i = 0; i < mvert_num; i++) {
		cloth->verts[i].avg_spring_len = 0.0f;
		}

		while (search) {
		ClothSpring *spring = search->link;

		if ( spring->type != CLOTH_SPRING_TYPE_SEWING ) {
		if (clmd->sim_parms->vgroup_shrink > 0)
		campbellbartonUnsubmitted Not Done Inline Actions Its possible number of vertices in dynamic mesh changes. there should be a check for this else you risk writing past `xrest` array and crashing. (unless I miss some array size check elsewhere) campbellbarton: Its possible number of vertices in dynamic mesh changes. there should be a check for this else…
		shrink_factor = 1.0f - ((cloth->verts[spring->ij].shrink_factor + cloth->verts[spring->kl].shrink_factor) / 2.0f);
		else
		shrink_factor = 1.0f - clmd->sim_parms->shrink_min;
		spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
		}

		if ( spring->type == CLOTH_SPRING_TYPE_STRUCTURAL ) {
		clmd->sim_parms->avg_spring_len += spring->restlen;
		cloth->verts[spring->ij].avg_spring_len += spring->restlen;
		cloth->verts[spring->kl].avg_spring_len += spring->restlen;
		struct_springs++;
		}

		search = search->next;
		}

		if (struct_springs > 0)
		clmd->sim_parms->avg_spring_len /= struct_springs;

		for (i = 0; i < mvert_num; i++) {
		cloth->verts[i].avg_spring_len = cloth->verts[i].avg_spring_len * 0.49f / ((float)cloth->verts[i].spring_count);
		}
		}

	BLI_INLINE void cross_identity_v3(float r[3][3], const float v[3])	BLI_INLINE void cross_identity_v3(float r[3][3], const float v[3])
	{	{
	zero_m3(r);	zero_m3(r);
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