ElevationColorMap.h

   1 /***********************************************************************
   2 ElevationColorMap - Class to represent elevation color maps for
   3 topographic maps.
   4 Copyright (c) 2014-2016 Oliver Kreylos
   5
   6 This file is part of the Augmented Reality Sandbox (SARndbox).
   7
   8 The Augmented Reality Sandbox is free software; you can redistribute it
   9 and/or modify it under the terms of the GNU General Public License as
  10 published by the Free Software Foundation; either version 2 of the
  11 License, or (at your option) any later version.
  12
  13 The Augmented Reality Sandbox is distributed in the hope that it will be
  14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License along
  19 with the Augmented Reality Sandbox; if not, write to the Free Software
  20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21 ***********************************************************************/
  22
  23 #ifndef ELEVATIONCOLORMAP_INCLUDED
  24 #define ELEVATIONCOLORMAP_INCLUDED
  25
  26 #include <GL/gl.h>
  27 #include <GL/GLColorMap.h>
  28 #include <GL/GLTextureObject.h>
  29
  30 #include "Types.h"
  31
  32 /* Forward declarations: */
  33 class DepthImageRenderer;
  34
  35 class ElevationColorMap: public GLColorMap, public GLTextureObject {
  36     /* Elements: */
  37   private:
  38     GLfloat texturePlaneEq[4]; // Texture mapping plane equation in GLSL-compatible format
  39
  40     /* Constructors and destructors: */
  41   public:
  42     ElevationColorMap(const char*
  43                       heightMapName); // Creates an elevation color map by loading the given height map file
  44
  45     /* Methods from GLObject: */
  46     virtual void initContext(GLContextData& contextData) const;
  47
  48     /* New methods: */
  49     void load(const char*
  50               heightMapName); // Overrides elevation color map by loading the given height map file
  51     void calcTexturePlane(const Plane&
  52                           basePlane); // Calculates the texture mapping plane for the given base plane equation
  53     void calcTexturePlane(const DepthImageRenderer*
  54                           depthImageRenderer); // Calculates the texture mapping plane for the given depth image renderer
  55     void bindTexture(GLContextData& contextData)
  56     const; // Binds the elevation color map texture object to the currently active texture unit
  57     void uploadTexturePlane(GLint location)
  58     const; // Uploads the texture mapping plane equation into the GLSL 4-vector at the given uniform location
  59 };
  60
  61 #endif