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12ea6a0288
This allows to build the CubeView demo from the unmodified FLTK sources w/o having to provide a 'config.h' file by defining HAVE_GL=1 on the compiler commandline. See also comment in test/CubeView.h. test/CubeMain.cxx: don't include <config.h> at all (not needed) test/CubeView.h: #include <config.h> only if HAVE_GL is not defined
126 lines
3.3 KiB
C++
126 lines
3.3 KiB
C++
//
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// CubeView class definitions for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2024 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#ifndef CUBEVIEW_H
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#define CUBEVIEW_H 1
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// Note: The CubeView demo program can only be built if
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// (1) '<config.h>' can be included (FLTK build) *or*
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// (2) 'HAVE_GL' has been defined prior to including this header.
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// Define 'HAVE_GL=1' on the compiler commandline to build
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// this program w/o 'config.h' (needs FLTK lib with GL).
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#ifndef HAVE_GL
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#include <config.h>
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#endif
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// Note to editor: the following code can and should be copied
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// to the fluid tutorial in 'documentation/src/fluid.dox'
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// *without* '#if HAVE_GL' preprocessor statements, leaving
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// only those parts where the condition is true.
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// [\code in documentation/src/fluid.dox]
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#include <FL/Fl.H>
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#if HAVE_GL
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#include <FL/Fl_Gl_Window.H>
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#include <FL/gl.h>
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#else
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#include <FL/Fl_Box.H>
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#endif /* HAVE_GL */
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#if HAVE_GL
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class CubeView : public Fl_Gl_Window {
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#else
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class CubeView : public Fl_Box {
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#endif /* HAVE_GL */
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public:
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CubeView(int x, int y, int w, int h, const char *l = 0);
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// This value determines the scaling factor used to draw the cube.
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double size;
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/* Set the rotation about the vertical (y) axis.
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*
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* This function is called by the horizontal roller in
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* CubeViewUI and the initialize button in CubeViewUI.
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*/
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void v_angle(double angle) { vAng = angle; }
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// Return the rotation about the vertical (y) axis.
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double v_angle() const { return vAng; }
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/* Set the rotation about the horizontal (x) axis.
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*
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* This function is called by the vertical roller in
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* CubeViewUI and the initialize button in CubeViewUI.
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*/
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void h_angle(double angle) { hAng = angle; }
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// The rotation about the horizontal (x) axis.
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double h_angle() const { return hAng; }
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/* Sets the x shift of the cube view camera.
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*
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* This function is called by the slider in CubeViewUI
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* and the initialize button in CubeViewUI.
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*/
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void panx(double x) { xshift = x; }
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/* Sets the y shift of the cube view camera.
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*
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* This function is called by the slider in CubeViewUI
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* and the initialize button in CubeViewUI.
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*/
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void pany(double y) { yshift = y; }
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#if HAVE_GL
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/* The widget class draw() FL_OVERRIDE.
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*
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* The draw() function initializes Gl for another round of
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* drawing, then calls specialized functions for drawing each
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* of the entities displayed in the cube view.
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*/
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void draw() FL_OVERRIDE;
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#endif /* HAVE_GL */
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private:
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/* Draw the cube boundaries.
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*
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* Draw the faces of the cube using the boxv[] vertices,
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* using GL_LINE_LOOP for the faces.
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*/
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#if HAVE_GL
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void drawCube();
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#else
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void drawCube() {}
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#endif /* HAVE_GL */
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double vAng, hAng;
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double xshift, yshift;
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float boxv0[3]; float boxv1[3];
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float boxv2[3]; float boxv3[3];
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float boxv4[3]; float boxv5[3];
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float boxv6[3]; float boxv7[3];
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};
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// [\endcode in documentation/src/fluid.dox]
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#endif // CUBEVIEW_H
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