Revert particle system and point cache removal in blender2.8 branch.

This reverts commit 5aa19be91263a249ffae75573e3b32f24269d890 and b4a721af694817fa921b119df83d33ede7d7fed0.

Due to postponement of particle system rewrite it was decided to put particle code
back into the 2.8 branch for the time being.

1 files changed, 46 insertions, 11 deletions

diff --git a/source/blender/editors/interface/interface_templates.c b/source/blender/editors/interface/interface_templates.c
index 9527ddc7088..2cdcf7a604d 100644
--- a/source/blender/editors/interface/interface_templates.c
+++ b/source/blender/editors/interface/interface_templates.c
@@ -64,6 +64,7 @@
 #include "BKE_modifier.h"
 #include "BKE_object.h"
 #include "BKE_packedFile.h"
+#include "BKE_particle.h"
 #include "BKE_paint.h"
 #include "BKE_report.h"
 #include "BKE_sca.h"
@@ -367,6 +368,7 @@ static const char *template_id_browse_tip(StructRNA *type)
 			case ID_AC:  return N_("Browse Action to be linked");
 			case ID_NT:  return N_("Browse Node Tree to be linked");
 			case ID_BR:  return N_("Browse Brush to be linked");
+			case ID_PA:  return N_("Browse Particle Settings to be linked");
 			case ID_GD:  return N_("Browse Grease Pencil Data to be linked");
 			case ID_MC:  return N_("Browse Movie Clip to be linked");
 			case ID_MSK: return N_("Browse Mask to be linked");
@@ -536,6 +538,7 @@ static void template_ID(
 		                                 BLT_I18NCONTEXT_ID_ACTION,
 		                                 BLT_I18NCONTEXT_ID_NODETREE,
 		                                 BLT_I18NCONTEXT_ID_BRUSH,
+		                                 BLT_I18NCONTEXT_ID_PARTICLESETTINGS,
 		                                 BLT_I18NCONTEXT_ID_GPENCIL,
 		                                 BLT_I18NCONTEXT_ID_FREESTYLELINESTYLE,
 		);
@@ -803,6 +806,16 @@ static void modifiers_convertToReal(bContext *C, void *ob_v, void *md_v)
 	ED_undo_push(C, "Modifier convert to real");
 }
 
+static int modifier_can_delete(ModifierData *md)
+{
+	/* fluid particle modifier can't be deleted here */
+	if (md->type == eModifierType_ParticleSystem)
+		if (((ParticleSystemModifierData *)md)->psys->part->type == PART_FLUID)
+			return 0;
+
+	return 1;
+}
+
 /* Check whether Modifier is a simulation or not, this is used for switching to the physics/particles context tab */
 static int modifier_is_simulation(ModifierData *md)
 {
@@ -812,6 +825,10 @@ static int modifier_is_simulation(ModifierData *md)
 	{
 		return 1;
 	}
+	/* Particle Tab */
+	else if (md->type == eModifierType_ParticleSystem) {
+		return 2;
+	}
 	else {
 		return 0;
 	}
@@ -926,14 +943,18 @@ static uiLayout *draw_modifier(
 		
 		UI_block_emboss_set(block, UI_EMBOSS_NONE);
 		/* When Modifier is a simulation, show button to switch to context rather than the delete button. */
-		if (!modifier_is_simulation(md) ||
-		    STREQ(scene->r.engine, RE_engine_id_BLENDER_GAME))
+		if (modifier_can_delete(md) &&
+		    (!modifier_is_simulation(md) ||
+		     STREQ(scene->r.engine, RE_engine_id_BLENDER_GAME)))
 		{
 			uiItemO(row, "", ICON_X, "OBJECT_OT_modifier_remove");
 		}
 		else if (modifier_is_simulation(md) == 1) {
 			uiItemStringO(row, "", ICON_BUTS, "WM_OT_properties_context_change", "context", "PHYSICS");
 		}
+		else if (modifier_is_simulation(md) == 2) {
+			uiItemStringO(row, "", ICON_BUTS, "WM_OT_properties_context_change", "context", "PARTICLES");
+		}
 		UI_block_emboss_set(block, UI_EMBOSS);
 	}
 
@@ -948,20 +969,34 @@ static uiLayout *draw_modifier(
 			/* only here obdata, the rest of modifiers is ob level */
 			UI_block_lock_set(block, BKE_object_obdata_is_libdata(ob), ERROR_LIBDATA_MESSAGE);
 			
-			uiLayoutSetOperatorContext(row, WM_OP_INVOKE_DEFAULT);
-			uiItemEnumO(row, "OBJECT_OT_modifier_apply", CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Apply"),
-			            0, "apply_as", MODIFIER_APPLY_DATA);
-			
-			if (modifier_isSameTopology(md) && !modifier_isNonGeometrical(md)) {
-				uiItemEnumO(row, "OBJECT_OT_modifier_apply",
-				            CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Apply as Shape Key"),
-				            0, "apply_as", MODIFIER_APPLY_SHAPE);
+			if (md->type == eModifierType_ParticleSystem) {
+				ParticleSystem *psys = ((ParticleSystemModifierData *)md)->psys;
+				
+				if (!(ob->mode & OB_MODE_PARTICLE_EDIT)) {
+					if (ELEM(psys->part->ren_as, PART_DRAW_GR, PART_DRAW_OB))
+						uiItemO(row, CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Convert"), ICON_NONE,
+						        "OBJECT_OT_duplicates_make_real");
+					else if (psys->part->ren_as == PART_DRAW_PATH && psys->pathcache)
+						uiItemO(row, CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Convert"), ICON_NONE,
+						        "OBJECT_OT_modifier_convert");
+				}
+			}
+			else {
+				uiLayoutSetOperatorContext(row, WM_OP_INVOKE_DEFAULT);
+				uiItemEnumO(row, "OBJECT_OT_modifier_apply", CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Apply"),
+				            0, "apply_as", MODIFIER_APPLY_DATA);
+				
+				if (modifier_isSameTopology(md) && !modifier_isNonGeometrical(md)) {
+					uiItemEnumO(row, "OBJECT_OT_modifier_apply",
+					            CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Apply as Shape Key"),
+					            0, "apply_as", MODIFIER_APPLY_SHAPE);
+				}
 			}
 			
 			UI_block_lock_clear(block);
 			UI_block_lock_set(block, ob && ID_IS_LINKED_DATABLOCK(ob), ERROR_LIBDATA_MESSAGE);
 			
-			if (!ELEM(md->type, eModifierType_Fluidsim, eModifierType_Softbody,
+			if (!ELEM(md->type, eModifierType_Fluidsim, eModifierType_Softbody, eModifierType_ParticleSystem,
 			           eModifierType_Cloth, eModifierType_Smoke))
 			{
 				uiItemO(row, CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Copy"), ICON_NONE,