mesh.h

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/*
 * Copyright 2011, Blender Foundation.
 *
 * 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.
 */

#ifndef __MESH_H__
#define __MESH_H__

#include "attribute.h"
#include "shader.h"

#include "util_boundbox.h"
#include "util_list.h"
#include "util_map.h"
#include "util_param.h"
#include "util_transform.h"
#include "util_types.h"
#include "util_vector.h"

CCL_NAMESPACE_BEGIN

class BVH;
class Device;
class DeviceScene;
class Mesh;
class Progress;
class Scene;
class SceneParams;
class AttributeRequest;

/* Mesh */

class Mesh {
public:
    /* Mesh Triangle */
    struct Triangle {
        int v[3];
    };

    /* Displacement */
    enum DisplacementMethod {
        DISPLACE_BUMP,
        DISPLACE_TRUE,
        DISPLACE_BOTH
    };

    ustring name;

    /* Mesh Data */
    vector<float3> verts;
    vector<Triangle> triangles;
    vector<uint> shader;
    vector<bool> smooth;

    vector<uint> used_shaders;
    AttributeSet attributes;

    BoundBox bounds;
    bool transform_applied;
    bool transform_negative_scaled;
    DisplacementMethod displacement_method;

    /* Update Flags */
    bool need_update;
    bool need_update_rebuild;

    /* BVH */
    BVH *bvh;
    size_t tri_offset;
    size_t vert_offset;

    /* Functions */
    Mesh();
    ~Mesh();

    void reserve(int numverts, int numfaces);
    void clear();
    void add_triangle(int v0, int v1, int v2, int shader, bool smooth);

    void compute_bounds();
    void add_face_normals();
    void add_vertex_normals();

    void pack_normals(Scene *scene, float4 *normal, float4 *vnormal);
    void pack_verts(float4 *tri_verts, float4 *tri_vindex, size_t vert_offset);
    void compute_bvh(SceneParams *params, Progress& progress);

    void tag_update(Scene *scene, bool rebuild);
};

/* Mesh Manager */

class MeshManager {
public:
    BVH *bvh;

    bool need_update;

    MeshManager();
    ~MeshManager();

    bool displace(Device *device, Scene *scene, Mesh *mesh, Progress& progress);

    /* attributes */
    void update_osl_attributes(Device *device, Scene *scene, vector<AttributeRequestSet>& mesh_attributes);
    void update_svm_attributes(Device *device, DeviceScene *dscene, Scene *scene, vector<AttributeRequestSet>& mesh_attributes);

    void device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
    void device_update_object(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
    void device_update_mesh(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
    void device_update_attributes(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
    void device_update_bvh(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
    void device_free(Device *device, DeviceScene *dscene);

    void tag_update(Scene *scene);
};

CCL_NAMESPACE_END

#endif /* __MESH_H__ */