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ArtDisplayDevice.C

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00001 /***************************************************************************
00002  *cr                                                                       
00003  *cr            (C) Copyright 1995-2019 The Board of Trustees of the           
00004  *cr                        University of Illinois                       
00005  *cr                         All Rights Reserved                        
00006  *cr                                                                   
00007  ***************************************************************************/
00008 /***************************************************************************
00009  * RCS INFORMATION:
00010  *
00011  *      $RCSfile: ArtDisplayDevice.C,v $
00012  *      $Author: johns $        $Locker:  $             $State: Exp $
00013  *      $Revision: 1.40 $       $Date: 2020/02/26 03:51:30 $
00014  *
00015  ***************************************************************************/
00035 #include <stdio.h>
00036 #include <string.h>
00037 #include <math.h>
00038 #include "ArtDisplayDevice.h"
00039 #include "Matrix4.h"
00040 #include "DispCmds.h"
00041 #include "Inform.h"
00042 #include "utilities.h"
00043 
00044 #define DEFAULT_RADIUS 0.002f
00045 #define DASH_LENGTH 0.02f
00046 
00047 // Be careful when you modify the coordinates.  To make things view the
00048 // right way, I have to rotate everything around the (x,y,z) = (1,1,1)
00049 // vector so that x->z, y->x, and z->y
00050 
00051 #define ORDER(x,y,z) -z, -x, y
00052 //#define ORDER(x,y,z) x,y,z
00053 
00055 
00056 // constructor ... initialize some variables
00057 ArtDisplayDevice::ArtDisplayDevice() 
00058 : FileRenderer("ART", "ART (VORT ray tracer)", "vmdscene.scn", "art %s 500 650"){ }
00059 
00060 //destructor
00061 ArtDisplayDevice::~ArtDisplayDevice(void) { }
00062 
00064 
00065 // draw a point
00066 void ArtDisplayDevice::point(float * spdata) {
00067   float vec[3];
00068 
00069   // transform the world coordinates
00070   (transMat.top()).multpoint3d(spdata, vec);
00071    
00072   // draw the sphere
00073   fprintf(outfile, "sphere {\ncolour %f,%f,%f\n",
00074           matData[colorIndex][0],
00075           matData[colorIndex][1],
00076           matData[colorIndex][2]);
00077 
00078   fprintf(outfile, "radius %f\n", float(lineWidth) * DEFAULT_RADIUS);
00079   fprintf(outfile, "center (%f,%f,%f)\n}\n", ORDER(vec[0], vec[1], vec[2]));
00080 }
00081 
00082 // draw a sphere
00083 void ArtDisplayDevice::sphere(float * spdata) {
00084   float vec[3];
00085   float radius;
00086     
00087   // transform the world coordinates
00088   (transMat.top()).multpoint3d(spdata, vec);
00089   radius = scale_radius(spdata[3]);
00090    
00091   // draw the sphere
00092   fprintf(outfile, "sphere {\ncolour %f,%f,%f\n",
00093           matData[colorIndex][0],
00094           matData[colorIndex][1],
00095           matData[colorIndex][2]);
00096 
00097   fprintf(outfile, "radius %f\n", radius);
00098   fprintf(outfile, "center (%f,%f,%f)\n}\n", ORDER(vec[0], vec[1], vec[2]));
00099 }
00100 
00101 
00102 // draw a line (cylinder) from a to b
00103 void ArtDisplayDevice::line(float *a, float *b) {
00104   int i, j, test;
00105   float dirvec[3], unitdirvec[3];
00106   float from[3], to[3], tmp1[3], tmp2[3];
00107  
00108   if (lineStyle == ::SOLIDLINE) {
00109     // transform the world coordinates
00110     (transMat.top()).multpoint3d(a, from);
00111     (transMat.top()).multpoint3d(b, to);
00112     
00113     // draw the cylinder
00114     fprintf(outfile, "cylinder {\n");
00115     fprintf(outfile, "colour %f,%f,%f\n",
00116            matData[colorIndex][0],
00117            matData[colorIndex][1],
00118            matData[colorIndex][2]);
00119     fprintf(outfile, "center(%f,%f,%f)\n", 
00120             ORDER(from[0], from[1], from[2])); // first point
00121     fprintf(outfile, "center(%f,%f,%f)\n", 
00122             ORDER(to[0], to[1], to[2])); // second point
00123     fprintf(outfile, "radius %f\n}\n", 
00124             float(lineWidth)*DEFAULT_RADIUS); // radius
00125         
00126   } else if (lineStyle == ::DASHEDLINE) {
00127      // transform the world coordinates
00128     (transMat.top()).multpoint3d(a, tmp1);
00129     (transMat.top()).multpoint3d(b, tmp2);
00130 
00131     // how to create a dashed line
00132     vec_sub(dirvec, tmp2, tmp1);  // vector from a to b
00133     vec_copy(unitdirvec, dirvec);
00134     vec_normalize(unitdirvec);    // unit vector from a to b
00135     test = 1;
00136     i = 0;
00137     while (test == 1) {
00138       for (j=0; j<3; j++) {
00139         from[j] = (float) (tmp1[j] + (2*i    )*DASH_LENGTH*unitdirvec[j]);
00140           to[j] = (float) (tmp1[j] + (2*i + 1)*DASH_LENGTH*unitdirvec[j]);
00141       }
00142       if (fabsf(tmp1[0] - to[0]) >= fabsf(dirvec[0])) {
00143         vec_copy(to, tmp2);
00144         test = 0;
00145       }
00146     
00147       // draw the cylinder
00148       fprintf(outfile, "cylinder {\n");
00149       fprintf(outfile, "colour %f,%f,%f\n",
00150               matData[colorIndex][0],
00151               matData[colorIndex][1],
00152               matData[colorIndex][2]);
00153 
00154       // first point
00155       fprintf(outfile, "center(%f,%f,%f)\n", ORDER(from[0], from[1], from[2]));
00156       // second point
00157       fprintf(outfile, "center(%f,%f,%f)\n", ORDER(to[0], to[1], to[2])); 
00158       // radius
00159       fprintf(outfile, "radius %f\n}\n", float(lineWidth)*DEFAULT_RADIUS); 
00160       i++;
00161     }
00162   } else {
00163     msgErr << "ArtDisplayDevice: Unknown line style " << lineStyle << sendmsg;
00164   }
00165 }
00166 
00167 // draw a cylinder
00168 void ArtDisplayDevice::cylinder(float *a, float *b, float r,int /*filled*/) {
00169 
00170   float vec1[3], vec2[3];
00171   
00172   // transform the world coordinates
00173   (transMat.top()).multpoint3d(a, vec1);
00174   (transMat.top()).multpoint3d(b, vec2);
00175     
00176   // draw the cylinder
00177   fprintf(outfile, "cylinder {\n");
00178   fprintf(outfile, "colour %f,%f,%f\n",
00179           matData[colorIndex][0],
00180           matData[colorIndex][1],
00181           matData[colorIndex][2]);
00182   // first point
00183   fprintf(outfile, "center(%f,%f,%f)\n", ORDER(vec1[0], vec1[1], vec1[2]));
00184   // second point
00185   fprintf(outfile, "center(%f,%f,%f)\n", ORDER(vec2[0], vec2[1], vec2[2])); 
00186   // radius
00187   fprintf(outfile, "radius %f\n}\n", scale_radius(r));
00188 }
00189 
00190 // draw a cone
00191 void ArtDisplayDevice::cone(float *a, float *b, float r, int /* resolution */) {
00192   float vec1[3], vec2[3];
00193   
00194   // transform the world coordinates
00195   (transMat.top()).multpoint3d(a, vec1);
00196   (transMat.top()).multpoint3d(b, vec2);
00197     
00198   fprintf(outfile, "cone {\n");
00199   fprintf(outfile, "colour %f,%f,%f\n",
00200           matData[colorIndex][0],
00201           matData[colorIndex][1],
00202           matData[colorIndex][2]);
00203   // second point
00204   fprintf(outfile, "vertex(%f,%f,%f)\n", ORDER(vec2[0], vec2[1], vec2[2])); 
00205   // first point
00206   fprintf(outfile, "center(%f,%f,%f)\n", ORDER(vec1[0], vec1[1], vec1[2]));
00207   // radius
00208   fprintf(outfile, "radius %f\n}\n", scale_radius(r));
00209 }
00210 
00211 // draw a triangle
00212 void ArtDisplayDevice::triangle(const float *a, const float *b, const float *c, const float *n1, 
00213 const float *n2, const float *n3) {
00214 
00215   float vec1[3], vec2[3], vec3[3];
00216   float nor1[3], nor2[3], nor3[3];
00217   
00218   // transform the world coordinates
00219   (transMat.top()).multpoint3d(a, vec1);
00220   (transMat.top()).multpoint3d(b, vec2);
00221   (transMat.top()).multpoint3d(c, vec3);
00222 
00223   // and the normals
00224   (transMat.top()).multnorm3d(n1, nor1);
00225   (transMat.top()).multnorm3d(n2, nor2);
00226   (transMat.top()).multnorm3d(n3, nor3);
00227 
00228   // draw the triangle
00229   fprintf(outfile, "polygon {\n");
00230   fprintf(outfile, "colour %f,%f,%f\n",
00231           matData[colorIndex][0],
00232           matData[colorIndex][1],
00233           matData[colorIndex][2]);
00234   
00235   fprintf(outfile, "vertex (%f,%f,%f),(%f,%f,%f)\n", 
00236           ORDER(vec1[0], vec1[1], vec1[2]), // point one
00237           ORDER(nor1[0], nor1[1], nor1[2]));
00238   
00239   fprintf(outfile, "vertex (%f,%f,%f),(%f,%f,%f)\n", 
00240           ORDER(vec2[0], vec2[1], vec2[2]), // point two
00241           ORDER(nor2[0], nor2[1], nor2[2]));
00242   fprintf(outfile, "vertex (%f,%f,%f),(%f,%f,%f)\n", 
00243           ORDER(vec3[0], vec3[1], vec3[2]), // point three
00244           ORDER(nor3[0], nor3[1], nor3[2]));
00245   fprintf(outfile, "}\n");
00246 }
00247 
00248 // draw a square
00249 void ArtDisplayDevice::square(float *, float *a, float *b, float *c, float *d) {
00250   
00251   float vec1[3], vec2[3], vec3[3], vec4[3];
00252   
00253   // transform the world coordinates
00254   (transMat.top()).multpoint3d(a, vec1);
00255   (transMat.top()).multpoint3d(b, vec2);
00256   (transMat.top()).multpoint3d(c, vec3);
00257   (transMat.top()).multpoint3d(d, vec4);
00258 
00259   // draw the square
00260   fprintf(outfile, "polygon {\n");
00261   fprintf(outfile, "colour %f,%f,%f\n", 
00262           matData[colorIndex][0],
00263           matData[colorIndex][1],
00264           matData[colorIndex][2]);
00265 
00266   fprintf(outfile, "vertex (%f,%f,%f)\n", 
00267           ORDER(vec1[0], vec1[1], vec1[2])); // point one
00268   fprintf(outfile, "vertex (%f,%f,%f)\n", 
00269           ORDER(vec2[0], vec2[1], vec2[2])); // point two
00270   fprintf(outfile, "vertex (%f,%f,%f)\n", 
00271           ORDER(vec3[0], vec3[1], vec3[2])); // point three
00272   fprintf(outfile, "vertex (%f,%f,%f)\n", 
00273           ORDER(vec4[0], vec4[1], vec4[2])); // point four
00274   fprintf(outfile, "}\n");
00275   
00276 }
00277 
00278 void ArtDisplayDevice::comment(const char *s)
00279 {
00280   fprintf(outfile, "// %s\n", s);
00281 }
00282 
00284 
00285 // initialize the file for output
00286 void ArtDisplayDevice::write_header() {
00287 
00288     Initialized = TRUE;
00289 
00290     fprintf(outfile, "up(0, 0, 1) \n");
00291     fprintf(outfile, "lookat(-1, 0, 0, 0, 0, 0, 0)\n");
00292     fprintf(outfile, "fieldofview 45 \n");
00293     
00294 
00295     // write the light sources
00296     // The light code doesn't work because at this point I don't have the
00297     //  correct transformation matrix, so I'll leave only the one light source
00298     fprintf(outfile, "light {\n\tcolour 1, 1, 1\n"
00299             "\tlocation (-10, 0, 0)\n}\n");
00300 
00301     // set the background
00302     fprintf(outfile, "background %f, %f, %f\n", 
00303             backColor[0], backColor[1], backColor[2]);
00304 
00305     // everything is plastic-like
00306     fprintf(outfile, "material 0.0, 0.75, 0.25, 20.0\n");
00307 }
00308 
00309     
00310 // clean up after yourself
00311 void ArtDisplayDevice::write_trailer() {
00312     fprintf(outfile, "//End of tokens \n");
00313     msgInfo << "Art file generation finished" << sendmsg;
00314 }
00315 

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