From 5f2a2e048da911e0a16acdf07d4914c60ebe1444 Mon Sep 17 00:00:00 2001
From: Bastien Montagne <montagne29@wanadoo.fr>
Date: Tue, 8 May 2018 17:52:24 +0200
Subject: [PATCH] Modifier stack: Port Caqst to new Mesh-based system.

---
 source/blender/modifiers/intern/MOD_cast.c | 65 +++++++++++++---------
 1 file changed, 39 insertions(+), 26 deletions(-)

diff --git a/source/blender/modifiers/intern/MOD_cast.c b/source/blender/modifiers/intern/MOD_cast.c
index 18c64a24392..a2283fd66e9 100644
--- a/source/blender/modifiers/intern/MOD_cast.c
+++ b/source/blender/modifiers/intern/MOD_cast.c
@@ -33,6 +33,7 @@
  */
 
 
+#include "DNA_mesh_types.h"
 #include "DNA_meshdata_types.h"
 #include "DNA_object_types.h"
 
@@ -41,8 +42,10 @@
 
 
 #include "BKE_deform.h"
-#include "BKE_DerivedMesh.h"
+#include "BKE_editmesh.h"
+#include "BKE_library.h"
 #include "BKE_library_query.h"
+#include "BKE_mesh.h"
 #include "BKE_modifier.h"
 
 #include "MOD_util.h"
@@ -102,7 +105,7 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
 }
 
 static void sphere_do(
-        CastModifierData *cmd, Object *ob, DerivedMesh *dm,
+        CastModifierData *cmd, Object *ob, Mesh *mesh,
         float (*vertexCos)[3], int numVerts)
 {
 	MDeformVert *dvert = NULL;
@@ -150,7 +153,7 @@ static void sphere_do(
 
 	/* 3) if we were given a vertex group name,
 	 * only those vertices should be affected */
-	modifier_get_vgroup(ob, dm, cmd->defgrp_name, &dvert, &defgrp_index);
+	modifier_get_vgroup_mesh(ob, mesh, cmd->defgrp_name, &dvert, &defgrp_index);
 
 	if (flag & MOD_CAST_SIZE_FROM_RADIUS) {
 		len = cmd->radius;
@@ -223,7 +226,7 @@ static void sphere_do(
 }
 
 static void cuboid_do(
-        CastModifierData *cmd, Object *ob, DerivedMesh *dm,
+        CastModifierData *cmd, Object *ob, Mesh *mesh,
         float (*vertexCos)[3], int numVerts)
 {
 	MDeformVert *dvert = NULL;
@@ -252,7 +255,7 @@ static void cuboid_do(
 
 	/* 3) if we were given a vertex group name,
 	 * only those vertices should be affected */
-	modifier_get_vgroup(ob, dm, cmd->defgrp_name, &dvert, &defgrp_index);
+	modifier_get_vgroup_mesh(ob, mesh, cmd->defgrp_name, &dvert, &defgrp_index);
 
 	if (ctrl_ob) {
 		if (flag & MOD_CAST_USE_OB_TRANSFORM) {
@@ -420,43 +423,53 @@ static void cuboid_do(
 }
 
 static void deformVerts(ModifierData *md, const ModifierEvalContext *ctx,
-                        DerivedMesh *derivedData,
+                        Mesh *mesh,
                         float (*vertexCos)[3],
                         int numVerts)
 {
-	DerivedMesh *dm = NULL;
 	CastModifierData *cmd = (CastModifierData *)md;
 
-	dm = get_dm(ctx->object, NULL, derivedData, NULL, false, false);
+	Mesh *mesh_src = mesh;
+
+	if (mesh_src == NULL) {
+		mesh_src = ctx->object->data;
+	}
+
+	BLI_assert(mesh_src->totvert == numVerts);
 
 	if (cmd->type == MOD_CAST_TYPE_CUBOID) {
-		cuboid_do(cmd, ctx->object, dm, vertexCos, numVerts);
+		cuboid_do(cmd, ctx->object, mesh_src, vertexCos, numVerts);
 	}
 	else { /* MOD_CAST_TYPE_SPHERE or MOD_CAST_TYPE_CYLINDER */
-		sphere_do(cmd, ctx->object, dm, vertexCos, numVerts);
+		sphere_do(cmd, ctx->object, mesh_src, vertexCos, numVerts);
 	}
-
-	if (dm != derivedData)
-		dm->release(dm);
 }
 
 static void deformVertsEM(
         ModifierData *md, const ModifierEvalContext *ctx,
         struct BMEditMesh *editData,
-        DerivedMesh *derivedData, float (*vertexCos)[3], int numVerts)
+        Mesh *mesh, float (*vertexCos)[3], int numVerts)
 {
-	DerivedMesh *dm = get_dm(ctx->object, editData, derivedData, NULL, false, false);
 	CastModifierData *cmd = (CastModifierData *)md;
 
-	if (cmd->type == MOD_CAST_TYPE_CUBOID) {
-		cuboid_do(cmd, ctx->object, dm, vertexCos, numVerts);
-	}
-	else { /* MOD_CAST_TYPE_SPHERE or MOD_CAST_TYPE_CYLINDER */
-		sphere_do(cmd, ctx->object, dm, vertexCos, numVerts);
+	Mesh *mesh_src = mesh;
+
+	if (mesh_src == NULL) {
+		mesh_src = BKE_bmesh_to_mesh_nomain(editData->bm, &(struct BMeshToMeshParams){0});
 	}
 
-	if (dm != derivedData)
-		dm->release(dm);
+	BLI_assert(mesh_src->totvert == numVerts);
+
+	if (cmd->type == MOD_CAST_TYPE_CUBOID) {
+		cuboid_do(cmd, ctx->object, mesh_src, vertexCos, numVerts);
+	}
+	else { /* MOD_CAST_TYPE_SPHERE or MOD_CAST_TYPE_CYLINDER */
+		sphere_do(cmd, ctx->object, mesh_src, vertexCos, numVerts);
+	}
+
+	if (!mesh) {
+		BKE_id_free(NULL, mesh_src);
+	}
 }
 
 
@@ -471,16 +484,16 @@ ModifierTypeInfo modifierType_Cast = {
 
 	/* copyData */          modifier_copyData_generic,
 
-	/* deformVerts_DM */    deformVerts,
+	/* deformVerts_DM */    NULL,
 	/* deformMatrices_DM */ NULL,
-	/* deformVertsEM_DM */  deformVertsEM,
+	/* deformVertsEM_DM */  NULL,
 	/* deformMatricesEM_DM*/NULL,
 	/* applyModifier_DM */  NULL,
 	/* applyModifierEM_DM */NULL,
 
-	/* deformVerts */       NULL,
+	/* deformVerts */       deformVerts,
 	/* deformMatrices */    NULL,
-	/* deformVertsEM */     NULL,
+	/* deformVertsEM */     deformVertsEM,
 	/* deformMatricesEM */  NULL,
 	/* applyModifier */     NULL,
 	/* applyModifierEM */   NULL,