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annotate src/graphics/opengl/gl-render.h @ 7829:8ca8e97e8c0a

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Add rendering interface for surface object (no implementation yet). * * * Add surface properties. * * * Add cdata -> RGB color conversion function. Use it in surface objects. * * * Add normals automatic computation to surface objects. * * * Make sure the correct "get" method is called. * * * Extend scaler interface to accept NDArray. * * * Surface rendering (1st part). * * * Fix wrong indexing. * * * Fix bug in xget_ancestor argument declaration. * * * Initialize OpenGL context correctly. Fix bug in surface rendering. * * * Set material color when rendering surface facets. * * * Add rendering of surface mesh and markers.
author Michael Goffioul <michael.goffioul@gmail.com>
date Thu, 14 Feb 2008 12:17:44 +0100
parents 13871b7de124
children 8ff92634982d
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1 /*
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2
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3 Copyright (C) 2008 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if !defined (gl_render_h)
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24 #define gl_render_h 1
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25
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26 #include "graphics.h"
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27
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28 class
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29 OCTGRAPHICS_API
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30 opengl_renderer
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31 {
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32 public:
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33 opengl_renderer (void) { }
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34
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35 virtual ~opengl_renderer (void) { }
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36
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37 virtual void draw (const graphics_handle& h)
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38 { draw (gh_manager::get_object (h)); }
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39
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40 virtual void draw (const graphics_object& go);
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41
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42 virtual void draw (const Matrix& hlist)
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43 {
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44 int len = hlist.length ();
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45
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46 for (int i = 0; i < len; i++)
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47 {
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48 graphics_handle h = gh_manager::lookup (hlist(i));
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49
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50 if (h.ok ())
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51 draw (h);
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52 }
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53 }
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54
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55 virtual void set_viewport (int w, int h);
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56
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57 protected:
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58 virtual void draw (const figure::properties& props);
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59 virtual void draw (const axes::properties& props);
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60 virtual void draw (const line::properties& props);
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61 virtual void draw (const surface::properties& props);
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62
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63 virtual void set_color (const Matrix& c);
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64 virtual void set_polygon_offset (bool on, double offset = 0.0);
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65 virtual void set_linewidth (float w);
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66 virtual void set_linestyle (const std::string& s, bool stipple = false);
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67 virtual void set_clipbox (double x1, double x2, double y1, double y2,
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68 double z1, double z2);
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69 virtual void set_clipping (bool on);
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70
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71 virtual void init_marker (const std::string& m, double size, float width);
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72 virtual void end_marker (void);
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73 virtual void draw_marker (double x, double y, double z,
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74 const Matrix& lc, const Matrix& fc);
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75
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76 private:
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77 opengl_renderer (const opengl_renderer&) { }
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78
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79 opengl_renderer& operator = (const opengl_renderer&)
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80 { return *this; }
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81
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82 bool is_nan_or_inf (double x, double y, double z) const
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83 {
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84 return (xisnan (x) || xisnan (y) || xisnan (z)
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85 || xisinf (x) || xisinf (y) || xisinf (z));
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86 }
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87
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88 octave_uint8 clip_code (double x, double y, double z) const
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89 {
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90 return ((x < xmin ? 1 : 0)
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91 | (x > xmax ? 1 : 0) << 1
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92 | (y < ymin ? 1 : 0) << 2
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93 | (y > ymax ? 1 : 0) << 3
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94 | (z < zmin ? 1 : 0) << 4
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95 | (z > zmax ? 1 : 0) << 5
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96 | (is_nan_or_inf (x, y, z) ? 0 : 1) << 6);
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97 }
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98
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99 unsigned int make_marker_list (const std::string& m, double size,
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100 bool filled) const;
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101
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102 private:
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103 /* the backend associated with the figure being rendered */
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104 graphics_backend backend;
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105 /* axes transformation data */
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106 graphics_xform xform;
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107 /* axis limits in model scaled coordinate */
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108 double xmin, xmax;
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109 double ymin, ymax;
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110 double zmin, zmax;
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111 /* Z projection limits in windows coordinate */
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112 double xZ1, xZ2;
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113 /* call lists identifiers for markers */
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114 unsigned int marker_id, filled_marker_id;
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115 /* camera information for primitive sorting */
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116 ColumnVector camera_pos, camera_dir;
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117 };
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118
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119 #endif