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//
// CubeView class definitions for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2024 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#ifndef CUBEVIEW_H
#define CUBEVIEW_H 1
// Note: The CubeView demo program can only be built if
// (1) '<config.h>' can be included (FLTK build) *or*
// (2) 'HAVE_GL' has been defined prior to including this header.
// Define 'HAVE_GL=1' on the compiler commandline to build
// this program w/o 'config.h' (needs FLTK lib with GL).
#ifndef HAVE_GL
#include <config.h>
#endif
// Note to editor: the following code can and should be copied
// to the fluid tutorial in 'documentation/src/fluid.dox'
// *without* '#if HAVE_GL' preprocessor statements, leaving
// only those parts where the condition is true.
// [\code in documentation/src/fluid.dox]
#include <FL/Fl.H>
#if HAVE_GL
#include <FL/Fl_Gl_Window.H>
#include <FL/gl.h>
#else
#include <FL/Fl_Box.H>
#endif /* HAVE_GL */
#if HAVE_GL
class CubeView : public Fl_Gl_Window {
#else
class CubeView : public Fl_Box {
#endif /* HAVE_GL */
public:
CubeView(int x, int y, int w, int h, const char *l = 0);
// This value determines the scaling factor used to draw the cube.
double size;
/* Set the rotation about the vertical (y) axis.
*
* This function is called by the horizontal roller in
* CubeViewUI and the initialize button in CubeViewUI.
*/
void v_angle(double angle) { vAng = angle; }
// Return the rotation about the vertical (y) axis.
double v_angle() const { return vAng; }
/* Set the rotation about the horizontal (x) axis.
*
* This function is called by the vertical roller in
* CubeViewUI and the initialize button in CubeViewUI.
*/
void h_angle(double angle) { hAng = angle; }
// The rotation about the horizontal (x) axis.
double h_angle() const { return hAng; }
/* Sets the x shift of the cube view camera.
*
* This function is called by the slider in CubeViewUI
* and the initialize button in CubeViewUI.
*/
void panx(double x) { xshift = x; }
/* Sets the y shift of the cube view camera.
*
* This function is called by the slider in CubeViewUI
* and the initialize button in CubeViewUI.
*/
void pany(double y) { yshift = y; }
#if HAVE_GL
/* The widget class draw() FL_OVERRIDE.
*
* The draw() function initializes Gl for another round of
* drawing, then calls specialized functions for drawing each
* of the entities displayed in the cube view.
*/
void draw() FL_OVERRIDE;
#endif /* HAVE_GL */
private:
/* Draw the cube boundaries.
*
* Draw the faces of the cube using the boxv[] vertices,
* using GL_LINE_LOOP for the faces.
*/
#if HAVE_GL
void drawCube();
#else
void drawCube() {}
#endif /* HAVE_GL */
double vAng, hAng;
double xshift, yshift;
float boxv0[3]; float boxv1[3];
float boxv2[3]; float boxv3[3];
float boxv4[3]; float boxv5[3];
float boxv6[3]; float boxv7[3];
};
// [\endcode in documentation/src/fluid.dox]
#endif // CUBEVIEW_H
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