uvedit_buttons.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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * Contributor(s): Blender Foundation, 2002-2009
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <string.h>
#include <stdio.h>

#include "MEM_guardedalloc.h"

#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"

#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_editVert.h"
#include "BLI_utildefines.h"

#include "BKE_context.h"
#include "BKE_customdata.h"
#include "BKE_mesh.h"
#include "BKE_screen.h"

#include "ED_image.h"
#include "ED_uvedit.h"

#include "UI_interface.h"
#include "UI_resources.h"

#include "WM_api.h"
#include "WM_types.h"

#define B_UVEDIT_VERTEX     3

/* UV Utilities */

static int uvedit_center(Scene *scene, EditMesh *em, Image *ima, float center[2])
{
    EditFace *efa;
    MTFace *tf;
    int tot= 0;

    zero_v2(center);

    for(efa= em->faces.first; efa; efa= efa->next) {
        tf= CustomData_em_get(&em->fdata, efa->data, CD_MTFACE);

        if(uvedit_face_visible(scene, ima, efa, tf)) {
            if(uvedit_uv_selected(scene, efa, tf, 0)) {
                add_v2_v2(center, tf->uv[0]);
                tot++;
            }
            if(uvedit_uv_selected(scene, efa, tf, 1)) {
                add_v2_v2(center, tf->uv[1]);
                tot++;
            }
            if(uvedit_uv_selected(scene, efa, tf, 2)) {
                add_v2_v2(center, tf->uv[2]);
                tot++;
            }
            if(efa->v4 && uvedit_uv_selected(scene, efa, tf, 3)) {
                add_v2_v2(center, tf->uv[3]);
                tot++;
            }
        }
    }

    if(tot > 0) {
        center[0] /= tot;
        center[1] /= tot;
    }

    return tot;
}

static void uvedit_translate(Scene *scene, EditMesh *em, Image *ima, float delta[2])
{
    EditFace *efa;
    MTFace *tf;

    for(efa= em->faces.first; efa; efa= efa->next) {
        tf= CustomData_em_get(&em->fdata, efa->data, CD_MTFACE);

        if(uvedit_face_visible(scene, ima, efa, tf)) {
            if(uvedit_uv_selected(scene, efa, tf, 0))
                add_v2_v2(tf->uv[0], delta);
            if(uvedit_uv_selected(scene, efa, tf, 1))
                add_v2_v2(tf->uv[1], delta);
            if(uvedit_uv_selected(scene, efa, tf, 2))
                add_v2_v2(tf->uv[2], delta);
            if(efa->v4 && uvedit_uv_selected(scene, efa, tf, 3))
                add_v2_v2(tf->uv[3], delta);
        }
    }
}

/* Button Functions, using an evil static variable */

static float uvedit_old_center[2];

static void uvedit_vertex_buttons(const bContext *C, uiBlock *block)
{
    SpaceImage *sima= CTX_wm_space_image(C);
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Image *ima= sima->image;
    float center[2];
    int imx, imy, step, digits;
    EditMesh *em;

    ED_space_image_size(sima, &imx, &imy);
    
    em= BKE_mesh_get_editmesh((Mesh *)obedit->data);

    if(uvedit_center(scene, em, ima, center)) {
        copy_v2_v2(uvedit_old_center, center);

        if(!(sima->flag & SI_COORDFLOATS)) {
            uvedit_old_center[0] *= imx;
            uvedit_old_center[1] *= imy;
        }

        if(sima->flag & SI_COORDFLOATS) {
            step= 1;
            digits= 3;
        }
        else {
            step= 100;
            digits= 2;
        }
        
        uiBlockBeginAlign(block);
        uiDefButF(block, NUM, B_UVEDIT_VERTEX, "X:",    10, 10, 145, 19, &uvedit_old_center[0], -10*imx, 10.0*imx, step, digits, "");
        uiDefButF(block, NUM, B_UVEDIT_VERTEX, "Y:",    165, 10, 145, 19, &uvedit_old_center[1], -10*imy, 10.0*imy, step, digits, "");
        uiBlockEndAlign(block);
    }

    BKE_mesh_end_editmesh(obedit->data, em);
}

static void do_uvedit_vertex(bContext *C, void *UNUSED(arg), int event)
{
    SpaceImage *sima= CTX_wm_space_image(C);
    Scene *scene= CTX_data_scene(C);
    Object *obedit= CTX_data_edit_object(C);
    Image *ima= sima->image;
    EditMesh *em;
    float center[2], delta[2];
    int imx, imy;

    if(event != B_UVEDIT_VERTEX)
        return;

    em= BKE_mesh_get_editmesh((Mesh *)obedit->data);

    ED_space_image_size(sima, &imx, &imy);
    uvedit_center(scene, em, ima, center);

    if(sima->flag & SI_COORDFLOATS) {
        delta[0]= uvedit_old_center[0] - center[0];
        delta[1]= uvedit_old_center[1] - center[1];
    }
    else {
        delta[0]= uvedit_old_center[0]/imx - center[0];
        delta[1]= uvedit_old_center[1]/imy - center[1];
    }

    uvedit_translate(scene, em, ima, delta);

    BKE_mesh_end_editmesh(obedit->data, em);

    WM_event_add_notifier(C, NC_IMAGE, sima->image);
}

/* Panels */

static int image_panel_uv_poll(const bContext *C, PanelType *UNUSED(pt))
{
    Object *obedit= CTX_data_edit_object(C);
    return ED_uvedit_test(obedit);
}

static void image_panel_uv(const bContext *C, Panel *pa)
{
    uiBlock *block;
    
    block= uiLayoutAbsoluteBlock(pa->layout);
    uiBlockSetHandleFunc(block, do_uvedit_vertex, NULL);

    uvedit_vertex_buttons(C, block);
}   

void ED_uvedit_buttons_register(ARegionType *art)
{
    PanelType *pt;

    pt= MEM_callocN(sizeof(PanelType), "spacetype image panel uv");
    strcpy(pt->idname, "IMAGE_PT_uv");
    strcpy(pt->label, "UV Vertex");
    pt->draw= image_panel_uv;
    pt->poll= image_panel_uv_poll;
    BLI_addtail(&art->paneltypes, pt);
}