[2] | 1 | ;+ |
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| 2 | ; NAME: |
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| 3 | ; |
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| 4 | ; SYMBOLS |
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| 5 | ; |
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| 6 | ; PURPOSE: |
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| 7 | ; |
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| 8 | ; Create custom plotting symbols |
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| 9 | ; |
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| 10 | ; CALLING SEQUENCE: |
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| 11 | ; |
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| 12 | ; SYMBOLS,SYMBOL_NUMBER,SCALE |
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| 13 | ; |
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| 14 | ; INPUTS: |
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| 15 | ; SYMBOL_NUMBER: |
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| 16 | ; |
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| 17 | ; 1 = open circle |
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| 18 | ; 2 = filled circle |
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| 19 | ; 3 = arrow pointing right |
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| 20 | ; 4 = arrow pointing left |
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| 21 | ; 5 = arrow pointing up |
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| 22 | ; 6 = arrow pointing down |
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| 23 | ; 7 = arrow pointing up and left (45 degrees) |
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| 24 | ; 8 = arrow pointing down and left |
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| 25 | ; 9 = arrow pointing down and right. |
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| 26 | ; 10 = arrow pointing up and right. |
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| 27 | ; 11 through 18 are bold versions of 3 through 10 |
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| 28 | ; 19 = horizontal line |
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| 29 | ; 20 = box |
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| 30 | ; 21 = diamond |
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| 31 | ; 22 = triangle |
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| 32 | ; 30 = filled box |
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| 33 | ; 31 = filled diamond |
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| 34 | ; 32 = filled triangle |
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| 35 | ; |
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| 36 | ; SCALE - size of symbols. |
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| 37 | ; |
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| 38 | ; KEYWORD PARAMETERS: |
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| 39 | ; |
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| 40 | ; COLOR - color of symbols |
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| 41 | ; |
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| 42 | ; SIDE EFFECTS: |
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| 43 | ; |
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| 44 | ; The desired symbol is stored in the user buffer and |
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| 45 | ; will be plotted if !P.PSYM = 8. |
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| 46 | ; |
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| 47 | ; MODIFICATION HISTORY: |
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| 48 | ; |
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| 49 | ; Jeff Bennett, U of Colorado, 198? |
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| 50 | ;- |
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| 51 | pro symbols,nsym,scale,color=col |
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| 52 | on_error,2 |
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| 53 | fill = 0 |
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| 54 | case 1 of |
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| 55 | (nsym le 2): begin ;circles |
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| 56 | ;for large scales increase number of points for res. |
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| 57 | if scale ge 4 then a = findgen(25) else $ |
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| 58 | a = findgen(13) |
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| 59 | a = a * (3.14159 / 6.) ;(0 - 12 or 24) pi/6 |
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| 60 | xarr = cos(a) |
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| 61 | yarr = sin(a) |
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| 62 | if nsym eq 2 then fill = 1 |
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| 63 | end |
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| 64 | ((nsym ge 3)*(nsym le 18)): begin ;arrow heads |
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| 65 | xarr = fltarr(5) |
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| 66 | yarr = xarr |
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| 67 | xarr(1) = 10. |
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| 68 | xarr(2) = 6. |
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| 69 | yarr(2) = 2. |
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| 70 | ;nsyms greater than 10 should be filled arrows |
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| 71 | if nsym gt 10 then begin |
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| 72 | xarr(3) = 6. |
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| 73 | xarr(4) = 10. |
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| 74 | yarr(3) = -2. |
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| 75 | fill = 1 |
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| 76 | endif else begin |
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| 77 | xarr(3) = 10. |
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| 78 | xarr(4) = 6. |
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| 79 | yarr(4) = -2. |
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| 80 | endelse |
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| 81 | case 1 of |
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| 82 | (nsym eq 3): dummy = 0b |
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| 83 | (nsym eq 4): xarr = -1.*xarr |
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| 84 | ((nsym eq 11)+(nsym eq 12)): begin |
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| 85 | xarr = extrac(xarr,0,11) |
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| 86 | yarr = extrac(yarr,0,11) |
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| 87 | yarr(6) = 0.5 |
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| 88 | xarr(7) = 6 |
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| 89 | yarr(7) = 0.5 |
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| 90 | xarr(8) = 6 |
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| 91 | yarr(8) = -0.5 |
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| 92 | yarr(9) = -0.5 |
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| 93 | if nsym eq 12 then begin |
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| 94 | rotation,xarr,yarr,180,nx,ny |
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| 95 | xarr = nx |
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| 96 | yarr = ny |
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| 97 | endif |
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| 98 | end |
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| 99 | ((nsym eq 5)+(nsym eq 13)): begin |
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| 100 | temp = xarr |
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| 101 | xarr = yarr |
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| 102 | yarr = temp |
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| 103 | end |
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| 104 | ((nsym eq 6)+(nsym eq 14)): begin |
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| 105 | temp = -1.*xarr |
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| 106 | xarr = yarr |
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| 107 | yarr = temp |
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| 108 | end |
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| 109 | ((nsym ge 7)*(nsym le 10) + $ |
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| 110 | (nsym ge 15)*(nsym le 18)): begin |
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| 111 | case 1 of |
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| 112 | ((nsym eq 7)+(nsym eq 15)): deg = 45 |
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| 113 | ((nsym eq 8)+(nsym eq 16)): deg = 135 |
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| 114 | ((nsym eq 9)+(nsym eq 17)): deg = 225 |
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| 115 | ((nsym eq 10)+(nsym eq 18)): deg = 315 |
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| 116 | endcase |
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| 117 | rotation,xarr,yarr,deg,nx,ny |
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| 118 | xarr = nx |
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| 119 | yarr = ny |
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| 120 | end ;end nsym ge 7 |
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| 121 | endcase |
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| 122 | end ;nsym between 3 and 18 |
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| 123 | ((nsym eq 20)+(nsym eq 21)+(nsym eq 30)+(nsym eq 31)): begin |
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| 124 | xarr = fltarr(5) + 3 |
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| 125 | yarr = xarr |
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| 126 | xarr(1) = -3. |
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| 127 | xarr(2) = -3. |
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| 128 | yarr(2) = -3. |
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| 129 | yarr(3) = -3. |
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| 130 | if (nsym eq 21)+(nsym eq 31) then begin |
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| 131 | rotation,xarr,yarr,45,nx,ny |
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| 132 | nx = 0.70 * nx ;shrink the x direction |
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| 133 | xarr = nx |
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| 134 | yarr = ny |
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| 135 | endif |
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| 136 | if nsym ge 30 then fill = 1 |
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| 137 | end ;nsym 20,21,30,31 |
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| 138 | ((nsym eq 22)+(nsym eq 32)): begin ;side length 6, 0 at centroid |
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| 139 | yarr = fltarr(4) - 6./4. |
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| 140 | xarr = fltarr(4) - 6./2. |
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| 141 | xarr(1) = 6./2. |
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| 142 | xarr(2) = 0. |
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| 143 | yarr(2) = 6.*sqrt(3.)/2. - 6./4. |
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| 144 | if nsym eq 32 then fill = 1 |
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| 145 | end |
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| 146 | else: begin |
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| 147 | xarr = fltarr(2) + 1 |
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| 148 | yarr = xarr * 0. |
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| 149 | xarr(1) = -1. |
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| 150 | end |
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| 151 | endcase |
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| 152 | ; |
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| 153 | xarr = xarr * scale |
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| 154 | yarr = yarr * scale |
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| 155 | ; |
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| 156 | ;set symbol buffer |
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| 157 | if keyword_set(col) then usersym,xarr,yarr,fill=fill,color=col else $ |
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| 158 | usersym,xarr,yarr,fill=fill |
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| 159 | ; |
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| 160 | return |
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| 161 | end |
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