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+\documentclass{article}
+\usepackage{axiom}
+\begin{document}
+\title{\$SPAD/src/graph/view3D buttons3d.c}
+\author{The Axiom Team}
+\maketitle
+\begin{abstract}
+\end{abstract}
+\eject
+\tableofcontents
+\eject
+\section{License}
+<<license>>=
+/*
+Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    - Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    - Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the
+      distribution.
+
+    - Neither the name of The Numerical ALgorithms Group Ltd. nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+@
+<<*>>=
+<<license>>
+
+#define _BUTTONS3D_C
+#include "axiom-c-macros.h"
+#include "useproto.h"
+
+#include "header.h"
+#include "cpanel.h"
+
+#include "all_3d.H1"
+#define BH	31  /* button window height */
+#define PH	80  /* potentiometer window height */
+#define XEDGE	5   /* leftmost button starts here */
+
+/*****************************************************
+ * int initButtons(buttons)                          *
+ *                                                   *
+ * Creates the fields for each button window in the  *
+ * three dimensional control panel, and returns the  *
+ * number of buttons created.                        *
+ *                                                   *
+ *****************************************************/
+
+int
+#ifdef _NO_PROTO
+initButtons (buttons)
+     buttonStruct *buttons;
+#else
+initButtons (buttonStruct *buttons)
+#endif
+{
+  
+  int PBY = 297; /* panel button Y coordinate at which buttons appear */
+  int ii, num = 0;
+  
+  /* Rotate, Zoom, and Translate Potentiometer Buttons */
+  
+  /* Title:  "Rotate" */
+  ii = rotate;
+  buttons[ii].buttonX       = XEDGE;    buttons[ii].buttonY         = 85;
+  buttons[ii].buttonWidth   = 110;  	buttons[ii].buttonHeight    = PH;
+  buttons[ii].buttonKey     = ii;
+  buttons[ii].pot           = yes;  /* rotate is a potentiometer */
+  buttons[ii].mask          = potMASK;
+  buttons[ii].textColor     = 139;  /* line color of rotate dial */
+  buttons[ii].xHalf         = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf         = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Title:  "Scale" */
+  ii = zoom;
+  buttons[ii].buttonX         = 121;  buttons[ii].buttonY           = 85;
+  buttons[ii].buttonWidth     = 58;   buttons[ii].buttonHeight      = PH;
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = yes;  /* zoom(scale) is a potentiometer */
+  buttons[ii].mask            = potMASK;
+  buttons[ii].textColor       = 165;  /* line color of scale arrow */
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  
+  /* Title:  "Translate" */
+  ii = translate;
+  buttons[ii].buttonX         = 185;  buttons[ii].buttonY      = 85;
+  buttons[ii].buttonWidth     = 110;  buttons[ii].buttonHeight = PH;
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = yes;  /* translate is a potentiometer */
+  buttons[ii].mask            = potMASK;
+  buttons[ii].textColor       = 21;   /* line color of translate arrows */
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* All the rest of the buttons are regular, toggle only buttons and
+     have the potentiometer variable set to "no". */
+  
+  /* First Row of Buttons */
+  /* The four rendering mode buttons:  
+     wireframe, hiddenline solid, hiddenline shaded and smooth shaded **/
+
+  /* Wirefram mesh */
+  ii = transparent;
+  buttons[ii].buttonX         = XEDGE;   buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth     = 45;	 buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = no;
+  buttons[ii].mask            = buttonMASK;
+  buttons[ii].text            = "Wire";
+  buttons[ii].textColor       = modeColor;
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Hidden surface mesh */
+  ii = opaqueMesh;
+  buttons[ii].buttonX         = 55;  buttons[ii].buttonY      = PBY;
+  buttons[ii].buttonWidth     = 53;  buttons[ii].buttonHeight = BH;
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = no;
+  buttons[ii].mask            = buttonMASK;
+  buttons[ii].text            = "Solid";
+  buttons[ii].textColor       = modeColor;
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Lambertian polygon fill with phong illumination model */
+  ii = render;
+  buttons[ii].buttonX       = 113;  buttons[ii].buttonY         = PBY;
+  buttons[ii].buttonWidth   = 53;   buttons[ii].buttonHeight    = BH;
+  buttons[ii].buttonKey     = ii;
+  buttons[ii].pot           = no;
+  buttons[ii].mask          = buttonMASK;
+  buttons[ii].text          = "Shade";
+  buttons[ii].textColor     = modeColor;
+  buttons[ii].xHalf         = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf         = buttons[ii].buttonHeight/2;
+  ++num;  
+  
+  /* Phong smooth shading and illumination */
+  ii = smooth;
+  buttons[ii].buttonX       = 171;  buttons[ii].buttonY         = PBY;
+  buttons[ii].buttonWidth   = 59;   buttons[ii].buttonHeight    = BH;
+  buttons[ii].buttonKey     = ii;
+  buttons[ii].pot           = no;
+  buttons[ii].mask          = buttonMASK;
+  buttons[ii].text          = "Smooth";
+  buttons[ii].textColor     = modeColor;
+  buttons[ii].xHalf         = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf         = buttons[ii].buttonHeight/2;
+  ++num;  
+  
+  /* Reset View Position Button */
+  ii = resetView;
+  buttons[ii].buttonX       = 240;    buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth   = 53;   buttons[ii].buttonHeight    = BH;
+  buttons[ii].buttonKey     = ii;
+  buttons[ii].pot           = no;
+  buttons[ii].mask          = buttonMASK;
+  buttons[ii].text          = "Reset";
+  buttons[ii].textColor     = 149;
+  buttons[ii].xHalf         = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf         = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  
+  /* Second Row of Buttons */
+
+  /* update y displacement of buttons row */
+  PBY=PBY+BH+3;  
+  
+  /* Bounding Region On/Off */
+  ii = region3D;
+  buttons[ii].buttonX     = XEDGE;    buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth = 58;       buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey   = ii;
+  buttons[ii].pot         = no;
+  buttons[ii].mask        = buttonMASK;
+  buttons[ii].text        = "Bounds";
+  buttons[ii].textColor   = 6;
+  buttons[ii].xHalf       = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf       = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Axes Turned On/Off */
+  ii = axesOnOff;
+  buttons[ii].buttonX     = 68;    buttons[ii].buttonY      = PBY;
+  buttons[ii].buttonWidth = 49;    buttons[ii].buttonHeight = BH;
+  buttons[ii].buttonKey   = ii;
+  buttons[ii].pot         = no;
+  buttons[ii].mask        = buttonMASK;
+  buttons[ii].text        = "Axes";
+  buttons[ii].textColor   = offColor;
+  buttons[ii].xHalf       = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf       = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Outline polygons with black lines in render mode */
+  ii = outlineOnOff;
+  buttons[ii].buttonX     = 122;   buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth = 70;    buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey   = ii;
+  buttons[ii].pot         = no;
+  buttons[ii].mask        = buttonMASK;
+  buttons[ii].text        = "Outline";
+  buttons[ii].textColor   = offColor;
+  buttons[ii].xHalf       = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf       = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Display as if a 1-bit plane image */
+  ii = bwColor;
+  buttons[ii].buttonX      = 197; buttons[ii].buttonY      = PBY;
+  buttons[ii].buttonWidth  = 33;  buttons[ii].buttonHeight = BH;
+  buttons[ii].buttonKey    = ii;
+  buttons[ii].pot          = no;
+  buttons[ii].mask         = buttonMASK;
+  buttons[ii].text         = "BW";
+  buttons[ii].textColor    = offColor;
+  buttons[ii].xHalf        = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf        = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Hide Control Panel */
+  ii = hideControl;
+  buttons[ii].buttonX      = 240;   buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth  = 53;    buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey    = ii;
+  buttons[ii].pot          = no;
+  buttons[ii].mask         = buttonMASK;
+  buttons[ii].text         = "Hide";
+  buttons[ii].textColor    = 149;
+  buttons[ii].xHalf        = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf        = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  
+  /* Third Row of Buttons */
+
+  /* update y displacement of buttons row */
+  PBY=PBY+BH+3;  
+  
+  /* Shows Lighting Control Panel */
+  ii = lighting;
+  buttons[ii].buttonX     = XEDGE;   buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth = 65;	     buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey   = ii;
+  buttons[ii].pot         = no;
+  buttons[ii].mask        = buttonMASK;
+  buttons[ii].text        = "Light";
+  buttons[ii].textColor   = 149;
+  buttons[ii].xHalf       = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf       = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Shows View Volume Control Panel */
+  ii = viewVolume;
+  buttons[ii].buttonX     = 75;    buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth = 100;   buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey   = ii;
+  buttons[ii].pot         = no;
+  buttons[ii].mask        = buttonMASK;
+  buttons[ii].text        = "View Volume";
+  buttons[ii].textColor   = 149;
+  buttons[ii].xHalf       = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf       = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Shows Save Panel */
+  ii = saveit;
+  buttons[ii].buttonX      = 180;  buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth  = 50;   buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey    = ii;
+  buttons[ii].pot          = no;
+  buttons[ii].mask         = buttonMASK;
+  buttons[ii].text         = "Save";
+  buttons[ii].textColor    = 149;
+  buttons[ii].xHalf        = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf        = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Exits from the viewport running */
+  ii = closeAll;
+  buttons[ii].buttonX     = 240;  buttons[ii].buttonY       = PBY;
+  buttons[ii].buttonWidth = 53;   buttons[ii].buttonHeight  = BH;
+  buttons[ii].buttonKey   = ii;
+  buttons[ii].pot         = no;
+  buttons[ii].mask        = buttonMASK;
+  buttons[ii].text        = "Quit";
+  buttons[ii].textColor   = offColor;
+  buttons[ii].xHalf       = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf       = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Buttons to control potentiometers */
+  /* These buttons appear above the potentiometer windows which they affect. */
+
+  /* Rotate potentiometer buttons */
+  
+  /* Rotate about the origin indicated by the axes */
+  /* Red is off, Green is on */
+  ii = originr;
+  buttons[ii].buttonX         = XEDGE;  buttons[ii].buttonY           = 55;
+  buttons[ii].buttonWidth     = 53;	buttons[ii].buttonHeight    = 25; 
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = no;  
+  buttons[ii].mask            = buttonMASK;
+  buttons[ii].text            = "origin";
+  buttons[ii].textColor       = onColor;
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Rotate about the objects center of volume */
+  /* Red is off, Green is on */
+  ii = objectr;
+  buttons[ii].buttonX         = 62;  buttons[ii].buttonY           = 55;
+  buttons[ii].buttonWidth     = 53;   buttons[ii].buttonHeight      = 25; 
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = no;  
+  buttons[ii].mask            = buttonMASK;
+  buttons[ii].text            = "object";
+  buttons[ii].textColor       = offColor; 
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Scale potentiometer buttons */
+  
+  /* Scale along X axis:  Red is off, Green is on */
+  ii = zoomx;
+  buttons[ii].buttonX         = 121;  buttons[ii].buttonY           = 55;
+  buttons[ii].buttonWidth     = 17;   buttons[ii].buttonHeight      = 25; 
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = no;  
+  buttons[ii].mask            = buttonMASK;
+  buttons[ii].text            = "x";
+  buttons[ii].textColor       = onColor;
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Scale along Y axis:  Red is off, Green is on */
+  ii = zoomy;
+  buttons[ii].buttonX         = 141;  buttons[ii].buttonY           = 55;
+  buttons[ii].buttonWidth     = 17;   buttons[ii].buttonHeight      = 25;
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = no;  
+  buttons[ii].mask            = buttonMASK;
+  buttons[ii].text            = "y";
+  buttons[ii].textColor       = onColor;
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Zoom along Z axis:  Red is off, Green is on */
+  ii = zoomz;
+  buttons[ii].buttonX         = 161;  buttons[ii].buttonY           = 55;
+  buttons[ii].buttonWidth     = 17;   buttons[ii].buttonHeight      = 25;
+  buttons[ii].buttonKey       = ii;
+  buttons[ii].pot             = no; 
+  buttons[ii].mask            = buttonMASK;
+  buttons[ii].text            = "z";
+  buttons[ii].textColor       = onColor;
+  buttons[ii].xHalf           = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf           = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Translate potentiometer buttons */
+  
+  /* Indicates an orthographic projection of the xy-plane,
+     translation is in x and y coordinates */ 
+  ii = xy;
+  buttons[ii].buttonX    = 185;  buttons[ii].buttonY      = 55;
+  buttons[ii].buttonWidth= 34;   buttons[ii].buttonHeight = 25;
+  buttons[ii].buttonKey  = ii;
+  buttons[ii].pot        = no;  
+  buttons[ii].mask       = buttonMASK;
+  buttons[ii].text       = "xy";
+  buttons[ii].textColor  = 35;
+  buttons[ii].xHalf      = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf      = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Indicates an orthographic projection of the xz-plane,
+     translation is in x and z coordinates */ 
+  ii = xz;
+  buttons[ii].buttonX    = 223;  buttons[ii].buttonY      = 55;
+  buttons[ii].buttonWidth= 34;   buttons[ii].buttonHeight = 25;
+  buttons[ii].buttonKey  = ii;
+  buttons[ii].pot        = no;  
+  buttons[ii].mask       = buttonMASK;
+  buttons[ii].text       = "xz";
+  buttons[ii].textColor  = 35;
+  buttons[ii].xHalf      = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf      = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  /* Indicates an orthographic projection of the yz-plane,
+     translation is in y and z coordinates */ 
+  ii = yz;
+  buttons[ii].buttonX    = 261;  buttons[ii].buttonY      = 55;
+  buttons[ii].buttonWidth= 34;   buttons[ii].buttonHeight = 25;
+  buttons[ii].buttonKey  = ii;
+  buttons[ii].pot        = no;  
+  buttons[ii].mask       = buttonMASK;
+  buttons[ii].text       = "yz";
+  buttons[ii].textColor  = 35;
+  buttons[ii].xHalf      = buttons[ii].buttonWidth/2;
+  buttons[ii].yHalf      = buttons[ii].buttonHeight/2;
+  ++num;
+  
+  return(num);
+  
+} /* initButtons() */
+
+@
+\eject
+\begin{thebibliography}{99}
+\bibitem{1} nothing
+\end{thebibliography}
+\end{document}