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1 #!/bin/csh -f |
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2 # RCSid: $Id: genbackg.csh,v 2.2 2008/08/25 04:50:32 greg Exp $ |
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3 # |
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4 # Generate height field to surround a mesh with an irregular border |
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5 # |
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6 # 4/16/2002 Greg Ward |
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7 # |
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8 if ( $#argv < 3 ) goto userr |
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9 # Get arguments |
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10 set mat = $1 |
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11 set nam = $2 |
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12 set mesh = $3 |
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13 # Get options |
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14 set smooth="" |
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15 set i = 4 |
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16 while ( $i <= $#argv ) |
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17 switch ($argv[$i]) |
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18 case -c: |
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19 @ i++ ; set a=$i |
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20 @ i++ ; set b=$i |
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21 @ i++ ; set c=$i |
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22 set c00=($argv[$a] $argv[$b] $argv[$c]) |
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23 @ i++ ; set a=$i |
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24 @ i++ ; set b=$i |
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25 @ i++ ; set c=$i |
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26 set c01=($argv[$a] $argv[$b] $argv[$c]) |
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27 @ i++ ; set a=$i |
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28 @ i++ ; set b=$i |
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29 @ i++ ; set c=$i |
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30 set c11=($argv[$a] $argv[$b] $argv[$c]) |
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31 @ i++ ; set a=$i |
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32 @ i++ ; set b=$i |
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33 @ i++ ; set c=$i |
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34 set c10=($argv[$a] $argv[$b] $argv[$c]) |
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35 unset a b c |
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36 breaksw |
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37 case -r: |
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38 @ i++ |
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39 set step = $argv[$i] |
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40 breaksw |
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41 case -b: |
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42 @ i++ |
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43 set bord = $argv[$i] |
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44 breaksw |
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45 case -s: |
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46 set smooth="-s" |
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47 breaksw |
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48 default: |
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49 goto userr |
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50 endsw |
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51 @ i++ |
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52 end |
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53 # Get corner points |
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54 set lim=(`getbbox -h $mesh`) |
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55 if (! $?bord ) then |
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56 set bord=`ev "($lim[2]-$lim[1]+$lim[4]-$lim[3])/20"` |
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57 endif |
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58 if (! $?c00 ) then |
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59 set c00=(`ev "$lim[1]-$bord" "$lim[3]-$bord" "($lim[5]+$lim[6])/2"`) |
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60 set c01=(`ev "$lim[2]+$bord" "$lim[3]-$bord" "($lim[5]+$lim[6])/2"`) |
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61 set c10=(`ev "$lim[1]-$bord" "$lim[4]+$bord" "($lim[5]+$lim[6])/2"`) |
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62 set c11=(`ev "$lim[2]+$bord" "$lim[4]+$bord" "($lim[5]+$lim[6])/2"`) |
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63 endif |
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64 # Get mesh resolution |
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65 if (! $?step ) then |
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66 set step=`ev "sqrt(($c11[1]-$c00[1])*($c11[1]-$c00[1])+($c11[2]-$c00[2])*($c11[2]-$c00[2]))/70"` |
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67 endif |
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68 set res=(`ev "ceil(sqrt(($c01[1]-$c00[1])*($c01[1]-$c00[1])+($c01[2]-$c00[2])*($c01[2]-$c00[2]))/$step)" "ceil(sqrt(($c10[1]-$c00[1])*($c10[1]-$c00[1])+($c10[2]-$c00[2])*($c10[2]-$c00[2]))/$step)"`) |
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69 set edgef=`mktemp /tmp/edgerad.XXXXXX` |
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70 cat > $edgef << _EOF_ |
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71 void sphere c00 |
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72 0 0 4 |
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73 $c00 .001 |
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74 void sphere c01 |
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75 0 0 4 |
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76 $c01 .001 |
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77 void sphere c10 |
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78 0 0 4 |
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79 $c10 .001 |
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80 void sphere c11 |
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81 0 0 4 |
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82 $c11 .001 |
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83 void cylinder ex0 |
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84 0 0 7 |
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85 $c00 $c10 .001 |
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86 void cylinder ex1 |
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87 0 0 7 |
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88 $c01 $c11 .001 |
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89 void cylinder ey0 |
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90 0 0 7 |
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91 $c00 $c01 .001 |
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92 void cylinder ey1 |
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93 0 0 7 |
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94 $c10 $c11 .001 |
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95 _EOF_ |
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96 set meshcal=`mkdir /tmp/meshcal.XXXXXX` |
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97 cat > $meshcal << _EOF_ |
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98 lerp(x,y0,y1):(1-x)*y0+x*y1; |
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99 and(a,b):if(a,b,-1); |
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100 or(a,b):if(a,1,b); |
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101 not(a):if(a,-1,1); |
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102 max(a,b):if(a-b,a,b); |
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103 min(a,b):if(a-b,b,a); |
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104 EPS:1e-7; |
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105 XR:min(32,floor($res[1]/2)); |
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106 YR:8; |
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107 eq(a,b):and(a-b+EPS,b-a+EPS); |
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108 sumfun2x(f,y,x0,x1):if(x1-x0+EPS,f(x0,y)+sumfun2x(f,y,x0+1,x1),0); |
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109 sumfun2(f,x0,x1,y0,y1):if(y1-y0+EPS, |
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110 sumfun2x(f,y0,x0,x1)+sumfun2(f,x0,x1,y0+1,y1), 0); |
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111 xpos(xf,yf)=lerp(xf,lerp(yf,$c00[1],$c10[1]),lerp(yf,$c01[1],$c11[1])); |
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112 ypos(xf,yf)=lerp(xf,lerp(yf,$c00[2],$c10[2]),lerp(yf,$c01[2],$c11[2])); |
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113 onedge=or(or(eq(x,0),eq(x,xmax-1)),or(eq(y,0),eq(y,ymax-1))); |
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114 z0:$lim[5]-$bord; |
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115 height(xo,yo)=z0+gi(1,xo,yo); |
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116 maxwt(xo,yo):if(and(eq(xo,0),eq(yo,0)),100,1/(xo*xo+yo*yo)); |
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117 wt(xo,yo)=if(height(xo,yo)-1e9, 0, maxwt(xo,yo)); |
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118 wtv(xo,yo)=wt(xo,yo)*height(xo,yo); |
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119 wts=sumfun2(wt,-XR,XR,-YR,YR); |
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120 sum=sumfun2(wtv,-XR,XR,-YR,YR); |
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121 inmesh=and(not(onedge),eq(sumfun2(wt,-1,1,-1,1),sumfun2(maxwt,-1,1,-1,1))); |
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122 lo=if(inmesh,1e10,if(wts-EPS,sum/wts,($lim[5]+$lim[6])/2)); |
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123 _EOF_ |
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124 # Generate height image |
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125 set meshoct=`/tmp/meshoct.XXXXXXX` |
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126 xform -m void $mesh | oconv - $edgef > $meshoct |
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127 set meshpic=`mktemp /tmp/meshpic.XXXXXX` |
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128 cnt $res[2] $res[1] \ |
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129 | rcalc -e 'sp=$2/'"($res[1]-1)" -e 'tp=1-$1/'"($res[2]-1)" \ |
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130 -f $meshcal -e "xp=xpos(sp,tp);yp=ypos(sp,tp)" \ |
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131 -e '$1=xp;$2=yp;$3=z0;$4=0;$5=0;$6=1' \ |
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132 | rtrace -w -faf -oL -x $res[1] -y $res[2] $meshoct \ |
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133 | pvalue -r -b -df > $meshpic |
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134 rm $edgef $meshoct |
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135 # Output mesh surround |
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136 cat << _EOF_ |
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137 # $0 $argv[*] |
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138 # Corner points: |
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139 # $c00 |
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140 # $c01 |
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141 # $c11 |
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142 # $c10 |
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143 _EOF_ |
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144 pflip -v $meshpic \ |
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145 | pcomb -f $meshcal - \ |
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146 | pvalue -h -H -pG -d \ |
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147 | gensurf $mat $nam 'xpos(s,t)' 'ypos(s,t)' - \ |
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148 `ev $res[1]-1 $res[2]-1` \ |
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149 -e 'valid(xf,yf)=1e9-Z`SYS(xf,yf)' \ |
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150 -f $meshcal $smooth |
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151 rm $meshcal $meshpic |
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152 # All done -- exit |
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153 exit 0 |
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154 # Usage error message |
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155 userr: |
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156 echo Usage: $0 "mat name mesh_file [-c corners][-b bord_width][-r step_size][-s]" |
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157 exit 1 |