IEmiterPoint.h

#pragma once

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 Filip Wasil and Fillwave community members
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <flw/flf/models/Entity.h>
#include <flw/flc/buffers/IndexBuffer.h>
#include <flw/flc/buffers/mVertexBufferParticles.h>
#include <flw/flc/pipeline/Program.h>
#include <flw/flc/texturing/Texture2D.h>
#include <flw/cmn/Blending.h>
#include <flw/flf/models/base/IReloadable.h>

namespace flw {
class Engine;
namespace flf {

class IEmiterPoint {
 public:
  IEmiterPoint(
    GLuint howMany
    , GLfloat size
    , GLfloat lifetime
    , flc::Texture2D* texture
    , glm::vec4 color
    , GLenum blendingSource
    , GLenum blendingDestination
    , GLboolean depthTesting
    , GLfloat alphaCutOff);

  virtual ~IEmiterPoint() = default;

  void setBlending(GLenum sourceFactor, GLenum destinationFactor);

  virtual void update(GLfloat timeElapsedSec) = 0;

 protected:
  void drawParticles();

  GLfloat mStartSize;
  GLfloat mLifetime;
  flc::Texture2D* mTexture;
  glm::vec4 mColor;
  GLuint mHowMany;
  GLboolean mDepthTesting;
  GLfloat mAlphaCutOff;
  flc::Program *mProgram;
  flc::IndexBuffer *mIBO;
  Blending mBlending;
};

} /* flf */
} /* flw */