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VrmlDisplayDevice.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: VrmlDisplayDevice.C,v $
00012  *      $Author: johns $        $Locker:  $             $State: Exp $
00013  *      $Revision: 1.41 $       $Date: 2020/02/26 06:51:41 $
00014  *
00015  ***************************************************************************/
00024 #include <stdio.h>
00025 #include <string.h>
00026 #include <math.h>
00027 #include <stdlib.h>  /* this is for the Hash Table */
00028 
00029 #include "VrmlDisplayDevice.h"
00030 #include "Matrix4.h"
00031 #include "DispCmds.h"
00032 #include "Inform.h"
00033 #include "utilities.h"
00034 
00035 #define DEFAULT_RADIUS 0.002
00036 #define DASH_LENGTH 0.02
00037 
00039 
00040 // constructor ... initialize some variables
00041 VrmlDisplayDevice::VrmlDisplayDevice(void) : 
00042   FileRenderer("VRML-1", "VRML 1.0 (VRML94)", "vmdscene.wrl", "true") {
00043         
00044   tList = NULL;
00045 }
00046                
00048 void VrmlDisplayDevice::set_color(int mycolorIndex) {
00049   write_cindexmaterial(mycolorIndex, materialIndex);
00050 }
00051 
00052 // draw a sphere
00053 void VrmlDisplayDevice::sphere(float *xyzr) {
00054   
00055   // draw the sphere
00056   fprintf(outfile, "Separator {\nTranslation { translation %f %f %f }\n",
00057           xyzr[0], xyzr[1], xyzr[2]);
00058 
00059   fprintf(outfile, "Sphere { radius %f }\n}\n", xyzr[3]);
00060 }
00061 
00064 void VrmlDisplayDevice::line(float *a, float*b) {
00065   // ugly and wasteful, but it will work
00066   // I guess I really should have done the "correct" indexing ...
00067   // I'll worry about that later.
00068   fprintf(outfile, "Coordinate3 {point [ %f %f %f, %f %f %f ] }\n",
00069           a[0], a[1], a[2], b[0], b[1], b[2]);
00070   fprintf(outfile, "IndexedLineSet { coordIndex [0, 1, -1] }\n");
00071 }
00072 
00073 static Matrix4 convert_endpoints_to_matrix(float *a, float *b) {
00074   // I need to transform (0,-1,0) - (0,1,0) radius 1
00075   // into a - b
00076   float c[3];
00077   vec_sub(c, b, a);
00078   
00079   float len = distance(a,b);
00080   if (len == 0.0) {
00081     return Matrix4();
00082   }
00083   
00084   Matrix4 trans;
00085   trans.translate( (a[0] + b[0]) / 2.0f, (a[1] + b[1]) / 2.0f, 
00086                    (a[2] + b[2]) / 2.0f);
00087 
00088   // this is a straight copy from transvec, which takes things
00089   // from the x axis to a given vector
00090   Matrix4 rot;
00091   if (c[0] == 0.0 && c[1] == 0.0) {
00092     // then wants the z axis
00093     if (c[2] > 0) {
00094       rot.rot(-90, 'y');
00095     } else {
00096       rot.rot(-90, 'y');
00097     }
00098   } else {
00099     float theta, phi;
00100     theta = (float) atan2(c[1], c[0]);
00101     phi = (float) atan2(c[2], sqrt(c[0]*c[0] + c[1]*c[1]));
00102     Matrix4 m1; m1.rot( (float) (-phi  * 180.0f / VMD_PI), 'y');
00103     rot.rot( (float) (theta * 180.0f / VMD_PI), 'z');
00104     rot.multmatrix(m1); 
00105   }
00106 
00107   // Compute everything
00108   Matrix4 mat(trans);
00109   mat.multmatrix(rot);
00110 
00111   // now bring to the y axis
00112   mat.rot(-90, 'z');
00113 
00114   return mat;
00115 }
00116 
00117 // draw a cylinder
00118 void VrmlDisplayDevice::cylinder(float *a, float *b, float r, int filled) {
00119   if (a[0] == b[0] && a[1] == b[1] && a[2] == b[2]) {
00120     return;  // we don't serve your kind here
00121   }
00122 
00123   push();
00124   Matrix4 mat = convert_endpoints_to_matrix(a, b);
00125   load(mat); // print matrix
00126 
00127   // draw the cylinder
00128   fprintf(outfile, "Cylinder { \n"
00129           "radius %f\n"
00130           "height %f\n"
00131           "parts %s}\n", 
00132           r, distance(a,b),  filled ? "ALL" : "SIDES");
00133 
00134   // pop out of this matrix
00135   pop();
00136 }
00137 
00138 
00139 // draw a cone
00140 void VrmlDisplayDevice::cone(float *a, float *b, float r, int /* resolution */) {
00141   if (a[0] == b[0] && a[1] == b[1] && a[2] == b[2]) {
00142     return;  // we don't serve your kind here
00143   }
00144 
00145   push();
00146   Matrix4 mat = convert_endpoints_to_matrix(a, b);
00147   load(mat); // print matrix
00148 
00149   // draw the cylinder
00150   fprintf(outfile, "Cone { \n"
00151           "bottomRadius %f\n"
00152           "height %f}\n",
00153           r, distance(a,b));
00154 
00155   // pop out of this matrix
00156   pop();
00157 }
00158 
00159 
00160 // draw a triangle
00161 void VrmlDisplayDevice::triangle(const float *a, const float *b, const float *c, 
00162                                  const float *n1, const float *n2, const float *n3) {
00163   fprintf(outfile,
00164           "Normal { vector [\n"
00165           " %f %f %f,\n %f %f %f,\n %f %f %f\n"
00166           " ] }\n",
00167           n1[0], n1[1], n1[2], n2[0], n2[1], n2[2], 
00168           n3[0], n3[1], n3[2]);
00169   fprintf(outfile, 
00170           "Coordinate3 {point [\n"
00171           " %f %f %f,\n"
00172           " %f %f %f,\n"
00173           " %f %f %f\n"
00174           " ] }\n",
00175           a[0], a[1], a[2], b[0], b[1], b[2], c[0], c[1], c[2]);
00176   fprintf(outfile, "IndexedFaceSet { coordIndex [0, 1, 2, -1] }\n");
00177 }
00178 
00179 void VrmlDisplayDevice::push(void) {
00180   fprintf(outfile, "#push matrix\nSeparator {\n");
00181 }
00182 
00183 void VrmlDisplayDevice::pop(void) {
00184   fprintf(outfile, "#pop matrix\n}\n");
00185 }
00186 
00187 void VrmlDisplayDevice::multmatrix(const Matrix4 &mat) {
00188   fprintf(outfile, "# multmatrix\n");
00189   load(mat);
00190 }
00191 
00192 void VrmlDisplayDevice::load(const Matrix4 &mat) {
00193   fprintf(outfile,
00194           "MatrixTransform {\n"
00195           "  matrix %g %g %g %g\n"
00196           "         %g %g %g %g\n"
00197           "         %g %g %g %g\n"
00198           "         %g %g %g %g\n"
00199           "}\n", 
00200           mat.mat[0], mat.mat[1], mat.mat[2], mat.mat[3],
00201           mat.mat[4], mat.mat[5], mat.mat[6], mat.mat[7],
00202           mat.mat[8], mat.mat[9], mat.mat[10], mat.mat[11],
00203           mat.mat[12], mat.mat[13], mat.mat[14], mat.mat[15]
00204           );
00205 }
00206 
00207 void VrmlDisplayDevice::comment(const char *s) {
00208   fprintf (outfile, "# %s\n", s);
00209 }
00210 
00212 
00213 // initialize the file for output
00214 void VrmlDisplayDevice::write_header(void) {
00215   fprintf(outfile, "#VRML V1.0 ascii\n");
00216   fprintf(outfile, "# Created with VMD: "
00217           "http://www.ks.uiuc.edu/Research/vmd/\n");
00218   fprintf(outfile, "Separator {\n");
00219 }
00220 
00221 void VrmlDisplayDevice::write_trailer(void) {
00222   fprintf(outfile, "# That's all, folks\n}\n");
00223 }
00224 
00225 void VrmlDisplayDevice::write_cindexmaterial(int cindex, int material) {
00226   write_colormaterial((float *) &matData[cindex], material);
00227 }
00228 
00229 void VrmlDisplayDevice::write_colormaterial(float *rgb, int) {
00230   // just grab the current material definition
00231   fprintf(outfile, "Material { \n");
00232   fprintf(outfile, "diffuseColor %f %f %f\n",
00233           mat_diffuse * rgb[0],
00234           mat_diffuse * rgb[1],
00235           mat_diffuse * rgb[2]);
00236   fprintf(outfile, "ambientColor %f %f %f\n",
00237           mat_ambient * rgb[0],
00238           mat_ambient * rgb[1],
00239           mat_ambient * rgb[2]);
00240   fprintf(outfile, "specularColor %f %f %f\n",
00241           mat_specular * rgb[0],
00242           mat_specular * rgb[1],
00243           mat_specular * rgb[2]);
00244   fprintf(outfile, "shininess %f\n",
00245           mat_shininess);
00246   fprintf(outfile, "transparency %f\n",
00247           1.0 - mat_opacity);
00248   fprintf(outfile, "}\n");
00249 }
00250 

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