openglactor.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef STARK_GFX_OPENGL_ACTOR_H
#define STARK_GFX_OPENGL_ACTOR_H

#include "engines/stark/gfx/renderentry.h"
#include "engines/stark/visual/actor.h"
#include "engines/stark/gfx/opengl.h"

#include "common/hashmap.h"
#include "common/hash-ptr.h"

#include "graphics/opengl/system_headers.h"

#if defined(USE_OPENGL_GAME)

namespace Stark {
namespace Gfx {

class OpenGLDriver;

struct _ActorVertex {
    float pos1x;
    float pos1y;
    float pos1z;
    float pos2x;
    float pos2y;
    float pos2z;
    uint32 bone1;
    uint32 bone2;
    float boneWeight;
    float normalx;
    float normaly;
    float normalz;
    float texS;
    float texT;
    float x;
    float y;
    float z;
    float nx;
    float ny;
    float nz;
    float sx;
    float sy;
    float sz;
    float r;
    float g;
    float b;
    float a;
};
typedef _ActorVertex ActorVertex;

class OpenGLActorRenderer : public VisualActor {
public:
    OpenGLActorRenderer(OpenGLDriver *gfx);
    virtual ~OpenGLActorRenderer();

    void render(const Math::Vector3d &position, float direction, const LightEntryArray &lights) override;

protected:
    typedef Common::HashMap<Face *, uint32 *> FaceBufferMap;

    OpenGLDriver *_gfx;

    ActorVertex *_faceVBO;
    FaceBufferMap _faceEBO;

    void clearVertices();
    void uploadVertices();
    ActorVertex *createModelVBO(const Model *model);
    uint32 *createFaceEBO(const Face *face);
    void setLightArrayUniform(const LightEntryArray &lights);

    Math::Vector3d getShadowLightDirection(const LightEntryArray &lights, const Math::Vector3d &actorPosition, Math::Matrix3 worldToModelRot);

    bool getPointLightContribution(LightEntry *light, const Math::Vector3d &actorPosition,
            Math::Vector3d &direction, float weight = 1.0f);
    bool getDirectionalLightContribution(LightEntry *light, Math::Vector3d &direction);
    bool getSpotLightContribution(LightEntry *light, const Math::Vector3d &actorPosition, Math::Vector3d &direction);
};

} // End of namespace Gfx
} // End of namespace Stark

#endif // defined(USE_OPENGL_GAME)

#endif // STARK_GFX_OPENGL_ACTOR_H