mesh_grob_tool.h

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/*
 *  OGF/Graphite: Geometry and Graphics Programming Library + Utilities
 *  Copyright (C) 2000-2009 INRIA - Project ALICE
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  If you modify this software, you should include a notice giving the
 *  name of the person performing the modification, the date of modification,
 *  and the reason for such modification.
 *
 *  Contact: Bruno Levy - levy@loria.fr
 *
 *     Project ALICE
 *     LORIA, INRIA Lorraine,
 *     Campus Scientifique, BP 239
 *     54506 VANDOEUVRE LES NANCY CEDEX
 *     FRANCE
 *
 *  Note that the GNU General Public License does not permit incorporating
 *  the Software into proprietary programs.
 *
 * As an exception to the GPL, Graphite can be linked with the following
 *  (non-GPL) libraries: Qt, SuperLU, WildMagic and CGAL
 */
 
 
#ifndef H_OGF_MESH_GFX_TOOLS_MESH_GROB_TOOL_H
#define H_OGF_MESH_GFX_TOOLS_MESH_GROB_TOOL_H
 
#include <OGF/mesh_gfx/common/common.h>
#include <OGF/mesh/grob/mesh_grob.h>
#include <OGF/scene_graph_gfx/tools/tool.h>
#include <OGF/scene_graph_gfx/tools/tools_manager.h>
#include <OGF/scene_graph_gfx/transforms/arc_ball.h>
 
namespace OGF {
 
    /*******************************************************************/
 
    gom_attribute(abstract,"true")
    gom_class MESH_GFX_API MeshGrobTool : public Tool {
    public:
 
        MeshGrobTool(ToolsManager* parent) ;
 
        ~MeshGrobTool() override;
 
        MeshGrob* mesh_grob() const {
            return dynamic_cast<MeshGrob*>(object()) ;
        }
 
        index_t pick_vertex(const RayPick& rp);
 
        index_t pick_edge(const RayPick& rp);
 
        index_t pick_facet(const RayPick& rp);
 
        index_t pick_cell(const RayPick& rp);
 
        bool pick_facet_edge(
            const RayPick& rp, index_t& facet, index_t& corner
        );
 
        index_t pick(
            const RayPick& rp, MeshElementsFlags what,
            Image* image=nullptr,
            index_t x0=0, index_t y0=0,
            index_t width=0, index_t height=0
        );
 
        vec3 drag_point(const RayPick& rp) const;
 
        const vec3& picked_point() const {
            return picked_point_;
        }
 
        const vec2& picked_ndc() const {
            return picked_ndc_;
        }
 
        double picked_depth() const {
            return picked_depth_;
        }
 
 
    protected:
        vec3 picked_point_;
        vec2 picked_ndc_;
        double picked_depth_;
    } ;
 
    /*******************************************************************/
 
    class MeshGrobTransformTool;
 
    class MESH_GFX_API MeshGrobTransformSubset : public MeshGrobTool {
    public:
 
        MeshGrobTransformSubset(MeshGrobTransformTool* parent);
 
        void grab(const RayPick& p_ndc) override;
 
    protected:
        void update_transform_subset(const mat4& M);
 
        const vec3& center() const;
 
        MeshGrobTransformTool* transform_tool_;
    };
 
    class MESH_GFX_API MeshGrobMoveSubset : public MeshGrobTransformSubset {
    public:
        MeshGrobMoveSubset(
            MeshGrobTransformTool* parent
        ) : MeshGrobTransformSubset(parent) {
        }
 
        void grab(const RayPick& p_ndc) override;
 
        void drag(const RayPick& p_ndc) override;
    };
 
    class MESH_GFX_API MeshGrobResizeSubset : public MeshGrobTransformSubset {
    public:
 
        MeshGrobResizeSubset(
            MeshGrobTransformTool* parent
        ) : MeshGrobTransformSubset(parent) {
        }
 
        void grab(const RayPick& p_ndc) override;
 
        void drag(const RayPick& p_ndc) override;
    };
 
    class MESH_GFX_API MeshGrobScrollResizeSubset :
        public MeshGrobTransformSubset {
    public:
 
        MeshGrobScrollResizeSubset(
            MeshGrobTransformTool* parent, int step
        ) : MeshGrobTransformSubset(parent), step_(step) {
        }
 
        void grab(const RayPick& p_ndc) override;
 
    private:
        int step_;
    };
 
    class MESH_GFX_API MeshGrobRotateSubset : public MeshGrobTransformSubset {
    public:
 
        MeshGrobRotateSubset(
            MeshGrobTransformTool* parent
        ) : MeshGrobTransformSubset(parent),
            arc_ball_(new ArcBall) {
        }
 
        void grab(const RayPick& p_ndc) override;
 
        void drag(const RayPick& p_ndc) override;
 
        void release(const RayPick& p_ndc) override;
 
    protected:
        ArcBall_var arc_ball_;
    };
 
    gom_attribute(abstract, "true")
    gom_class MESH_GFX_API MeshGrobTransformTool : public MultiTool {
    public:
        MeshGrobTransformTool(ToolsManager* parent) : MultiTool(parent) {
            set_tool(MOUSE_BUTTON_LEFT, new MeshGrobMoveSubset(this));
            set_tool(MOUSE_BUTTON_MIDDLE, new MeshGrobResizeSubset(this));
            set_tool(MOUSE_BUTTON_RIGHT, new MeshGrobRotateSubset(this));
            set_tool(
                MOUSE_BUTTON_WHEEL_UP,
                new MeshGrobScrollResizeSubset(this, -1)
            );
            set_tool(
                MOUSE_BUTTON_WHEEL_DOWN,
                new MeshGrobScrollResizeSubset(this,  1)
            );
            prev_inverse_transform_.load_identity();
        }
 
        void grab(const RayPick& p_ndc) override;
 
        void release(const RayPick& p_ndc) override;
 
        MeshGrob* mesh_grob() const {
            return dynamic_cast<MeshGrob*>(object()) ;
        }
 
    protected:
 
        void update_transform_subset(const mat4& M) {
            mat4 MM = M * prev_inverse_transform_;
            transform_subset(MM);
            prev_inverse_transform_ = M.inverse();
        }
 
        const vec3& center() const {
            return center_;
        }
 
        virtual void pick_subset(
            MeshGrobTransformSubset* tool, const RayPick& rp
        ) = 0;
 
        virtual void transform_subset(const mat4& M) = 0;
 
        virtual void clear_subset();
 
        mat4 prev_inverse_transform_;
        friend class MeshGrobTransformSubset;
        vec3 center_;
    };
}
 
 
#endif