MOD_dynamicpaint.c

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software  Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Miika Hämäläinen
 *
 * ***** END GPL LICENSE BLOCK *****
 *
 */

#include <stddef.h>

#include "DNA_dynamicpaint_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"

#include "MEM_guardedalloc.h"

#include "BLI_utildefines.h"

#include "BKE_cdderivedmesh.h"
#include "BKE_dynamicpaint.h"
#include "BKE_modifier.h"

#include "depsgraph_private.h"

#include "MOD_util.h"


static void initData(ModifierData *md) 
{
    DynamicPaintModifierData *pmd = (DynamicPaintModifierData*) md;
    
    pmd->canvas = NULL;
    pmd->brush = NULL;
    pmd->type = MOD_DYNAMICPAINT_TYPE_CANVAS;
}

static void copyData(ModifierData *md, ModifierData *target)
{
    DynamicPaintModifierData *pmd  = (DynamicPaintModifierData*)md;
    DynamicPaintModifierData *tpmd = (DynamicPaintModifierData*)target;
    
    dynamicPaint_Modifier_copy(pmd, tpmd);
}

static void freeData(ModifierData *md)
{
    DynamicPaintModifierData *pmd = (DynamicPaintModifierData*) md;
    dynamicPaint_Modifier_free(pmd);
}

static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
    DynamicPaintModifierData *pmd = (DynamicPaintModifierData*)md;
    CustomDataMask dataMask = 0;

    if (pmd->canvas) {
        DynamicPaintSurface *surface = pmd->canvas->surfaces.first;
        for(; surface; surface=surface->next) {
            /* tface */
            if (surface->format == MOD_DPAINT_SURFACE_F_IMAGESEQ || 
                surface->init_color_type == MOD_DPAINT_INITIAL_TEXTURE) {
                dataMask |= (1 << CD_MTFACE);
            }
            /* mcol */
            if (surface->type == MOD_DPAINT_SURFACE_T_PAINT ||
                surface->init_color_type == MOD_DPAINT_INITIAL_VERTEXCOLOR) {
                dataMask |= (1 << CD_MCOL);
            }
            /* CD_MDEFORMVERT */
            if (surface->type == MOD_DPAINT_SURFACE_T_WEIGHT) {
                dataMask |= (1 << CD_MDEFORMVERT);
            }
        }
    }

    if (pmd->brush) {
        if (pmd->brush->flags & MOD_DPAINT_USE_MATERIAL) {
            dataMask |= (1 << CD_MTFACE);
        }
    }
    return dataMask;
}

static DerivedMesh *applyModifier(ModifierData *md, Object *ob, 
                        DerivedMesh *dm,
                        int UNUSED(useRenderParams),
                        int UNUSED(isFinalCalc))
{
    DynamicPaintModifierData *pmd = (DynamicPaintModifierData*) md;

    return dynamicPaint_Modifier_do(pmd, md->scene, ob, dm);
}

static void updateDepgraph(ModifierData *md, DagForest *forest,
                        struct Scene *scene,
                        Object *ob,
                        DagNode *obNode)
{
    DynamicPaintModifierData *pmd = (DynamicPaintModifierData*) md;

    /* add relation from canvases to all brush objects */
    if(pmd && pmd->canvas)
    {
        Base *base = scene->base.first;

        for(; base; base = base->next) {
            DynamicPaintModifierData *pmd2 = (DynamicPaintModifierData *)modifiers_findByType(base->object, eModifierType_DynamicPaint);

            if(pmd2 && pmd2->brush && ob!=base->object)
            {
                DagNode *brushNode = dag_get_node(forest, base->object);
                dag_add_relation(forest, brushNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA, "Dynamic Paint Brush");
            }
        }
    }
}

static int dependsOnTime(ModifierData *UNUSED(md))
{
    return 1;
}

static void foreachIDLink(ModifierData *md, Object *ob,
                       IDWalkFunc walk, void *userData)
{
    DynamicPaintModifierData *pmd = (DynamicPaintModifierData*) md;

    if(pmd->canvas) {
        DynamicPaintSurface *surface = pmd->canvas->surfaces.first;

        for(; surface; surface=surface->next) {
            walk(userData, ob, (ID **)&surface->brush_group);
            walk(userData, ob, (ID **)&surface->init_texture);
        }
    }
    if (pmd->brush) {
        walk(userData, ob, (ID **)&pmd->brush->mat);
    }
}

static void foreachTexLink(ModifierData *UNUSED(md), Object *UNUSED(ob),
                       TexWalkFunc UNUSED(walk), void *UNUSED(userData))
{
    //walk(userData, ob, md, ""); /* re-enable when possible */
}

ModifierTypeInfo modifierType_DynamicPaint = {
    /* name */              "Dynamic Paint",
    /* structName */        "DynamicPaintModifierData",
    /* structSize */        sizeof(DynamicPaintModifierData),
    /* type */              eModifierTypeType_Constructive,
    /* flags */             eModifierTypeFlag_AcceptsMesh
                            | eModifierTypeFlag_UsesPointCache
                            | eModifierTypeFlag_Single,

    /* copyData */          copyData,
    /* deformVerts */       NULL,
    /* deformMatrices */    NULL,
    /* deformVertsEM */     NULL,
    /* deformMatricesEM */  NULL,
    /* applyModifier */     applyModifier,
    /* applyModifierEM */   NULL,
    /* initData */          initData,
    /* requiredDataMask */  requiredDataMask,
    /* freeData */          freeData,
    /* isDisabled */        NULL,
    /* updateDepgraph */    updateDepgraph,
    /* dependsOnTime */     dependsOnTime,
    /* dependsOnNormals */  NULL,
    /* foreachObjectLink */ NULL,
    /* foreachIDLink */     foreachIDLink,
    /* foreachTexLink */    foreachTexLink,
};