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Text File  |  1996-09-28  |  4.5 KB  |  199 lines
  1. % Font for examples in Chapter 21 of The METAFONTbook
  2.  
  3. font_size 10pt#;
  4. mode_setup;
  5.  
  6. font_identifier "RANDOM";
  7. font_coding_scheme "PI";
  8.  
  9. % uniforms (characters 0--9)
  10. randomseed:=3.14159;
  11. for code=0 upto 9:
  12. beginchar(code,10pt#,10pt#,0);
  13. pickup pencircle scaled .3pt; draw unitsquare scaled w;
  14. pickup pencircle scaled 1pt;
  15. for k=1 upto 100: drawdot(uniformdeviate w,uniformdeviate w); endfor
  16. endchar;
  17. endfor
  18.  
  19. % normals (characters 10--19)
  20. randomseed:=3.14159;
  21. for code=10 upto 19:
  22. beginchar(code,10pt#,10pt#,0);
  23. pickup pencircle scaled .3pt; draw unitsquare scaled w;
  24. pickup pencircle scaled 1pt;
  25. for k=1 upto 100: drawdot(1/6w*normaldeviate+.5w,1/6w*normaldeviate+.5w); endfor
  26. endchar;
  27. endfor
  28.  
  29. % both (characters 20--29)
  30. randomseed:=3.14159;
  31. for code=20 upto 29:
  32. beginchar(code,10pt#,10pt#,0);
  33. pickup pencircle scaled .3pt; draw unitsquare scaled w;
  34. pickup pencircle scaled 1pt;
  35. for k=1 upto 100: drawdot(uniformdeviate w,1/6w*normaldeviate+.5w); endfor
  36. endchar;
  37. endfor
  38.  
  39. % METAFONT logo (characters 30--109)
  40. randomseed:=ASCII"M"+epsilon*ASCII"F";
  41. vardef noise=normaldeviate*craziness enddef;
  42.  
  43. ht#:=6pt#;
  44. xgap#:=0.6pt#;
  45. u#:=4/9pt#;
  46. s#:=0;
  47. o#:=1/9pt#;
  48. px#:=2/3pt#;
  49. ygap#:=xgap#;
  50. leftstemloc#:=2.5u#+s#;
  51. barheight#:=.45ht#;
  52. define_pixels(s,u,xgap,ygap,leftstemloc,barheight);
  53. py#:=.9px#; define_blacker_pixels(px,py);
  54. pickup pencircle xscaled px yscaled py; logo_pen:=savepen;
  55. define_corrected_pixels(o);
  56.  
  57. def beginlogochar(expr c,n) =
  58.  beginchar(incr code,n*u#+2s#,ht#,0); pickup logo_pen enddef;
  59.  
  60. def NN=
  61. beginlogochar("N",15);
  62. x1=leftstemloc+noise;
  63. x2=leftstemloc+noise;
  64. x4=w-leftstemloc+noise;
  65. x5=w-leftstemloc+noise;
  66. bot y1=noise-o;
  67. top y2=h+o+noise;
  68. y3=y4+ygap+noise;
  69. bot y4=noise-o;
  70. top y5=h+o+noise;
  71. z3=whatever[z4,z5];
  72. draw z1--z2--z3; draw z4--z5; labels(1,2,3,4,5); endchar;
  73. enddef;
  74.  
  75. def MM=
  76. beginlogochar("M",18);
  77. x1=leftstemloc+noise;
  78. x2=leftstemloc+noise;
  79. x3=.5w+noise;
  80. x4=w-leftstemloc+noise;
  81. x5=w-leftstemloc+noise;
  82. bot y1=noise-o;
  83. top y2=h+o+noise;
  84. bot y3=ygap+noise;
  85. top y4=h+o+noise;
  86. bot y5=noise-o;
  87. draw z1--z2--z3--z4--z5; labels(1,2,3,4,5); endchar;
  88. enddef;
  89.  
  90. def EE=
  91. beginlogochar("E",14);
  92. x1=leftstemloc+noise;
  93. x3=leftstemloc+noise;
  94. x4=w-leftstemloc+o+noise;
  95. x5=w-leftstemloc+o-xgap+noise;
  96. x6=w-leftstemloc+o+noise;
  97. bot y1=noise;
  98. y2=barheight+noise;
  99. top y3=h+noise;
  100. top y4=h+noise;
  101. y5=barheight+noise;
  102. bot y6=noise;
  103. z2=whatever[z1,z3];
  104. draw z6--z1--z3--z4; draw z2--z5; labels(1,2,3,4,5,6); endchar;
  105. enddef;
  106.  
  107. def FF=
  108. beginlogochar("F",14);
  109. x1=leftstemloc+noise;
  110. x3=leftstemloc+noise;
  111. x4=w-leftstemloc+o+noise;
  112. x5=w-leftstemloc+o-xgap+noise;
  113. bot y1=noise-o;
  114. y2=barheight+noise;
  115. top y3=h+noise;
  116. top y4=h+noise;
  117. y5=barheight+noise;
  118. bot y6=noise;
  119. z2=whatever[z1,z3];
  120. draw z1--z3--z4; draw z2--z5; labels(1,2,3,4,5); endchar;
  121. enddef;
  122.  
  123. def TT=
  124. beginlogochar("T",13);
  125. lft x1=noise;
  126. rt x2=w+noise;
  127. x3=.5w+noise;
  128. x4=.5w+noise;
  129. top y1=h+noise;
  130. top y2=h+noise;
  131. bot y4=noise-o;
  132. z3=whatever[z1,z2];
  133. draw z1--z2; draw z3--z4; labels(1,2,3,4); endchar;
  134. enddef;
  135.  
  136. def AA=
  137. beginlogochar("A",15);
  138. x1=.5w+noise;
  139. x2'=leftstemloc+noise;
  140. x3'=w-leftstemloc+noise;
  141. x4=leftstemloc+noise;
  142. x5=w-leftstemloc+noise;
  143. top y2'=h+o+noise;
  144. top y3'=h+o+noise;
  145. y2=barheight+noise;
  146. y3=barheight+noise;
  147. bot y4=noise-o;
  148. bot y5=noise-o;
  149. z1=whatever[z2',z3'];
  150. z2=whatever[z4,z2'];
  151. z3=whatever[z5,z3'];
  152. draw z4--z2--z3--z5;
  153. draw z2{z2'-z2}...z2+.8(z2'-z2)-.2(z2'-z1){z1-z2}
  154.  ...z1{z3'-z2'}...z3+.8(z3'-z3)-.2(z3'-z1){z3-z1}...z3{z3-z3'};
  155. labels(1,2,3,4,5,2',3'); endchar;
  156. enddef;
  157.  
  158. def OO=
  159. beginlogochar("O",15);
  160. x1'=1.5u+s+noise;
  161. x2'=1.5u+s+noise;
  162. x3'=w-1.5u-s+noise;
  163. x4'=w-1.5u-s+noise;
  164. bot y1'=noise-o;
  165. top y2'=h+o+noise;
  166. top y3'=h+o+noise;
  167. bot y4'=noise-o;
  168. z1=.5[z1',z2']; z2=.5[z2',z3']; z3=.5[z3',z4']; z4=.5[z4',z1'];
  169. draw z2{z2'-z3'}...z2+.8(z2'-z2)-.2(z2'-z1){z1-z2}
  170.  ...z1{z1'-z2'}...z1+.8(z1'-z1)-.2(z1'-z4){z4-z1}
  171.  ...z4{z4'-z1'}...z4+.8(z4'-z4)-.2(z4'-z3){z3-z4}
  172.  ...z3{z3'-z4'}...z3+.8(z3'-z3)-.2(z3'-z2){z2-z3}...cycle;
  173. labels(1,2,3,4,5,2',3'); endchar;
  174. enddef;
  175.  
  176.  
  177. code:=29;
  178. for c=10 downto 1:craziness:=c*.05pt;
  179.  MM; EE; TT; AA; FF; OO; NN; TT; endfor
  180.  
  181. % histogram (character 126)
  182. randomseed:=0;
  183. beginchar(126,24pt#,10pt#,0);
  184. %pickup pencircle scaled .3pt; draw unitsquare xscaled w yscaled h;
  185.  numeric count[]; pickup pencircle scaled 1pt;
  186. for n:=1 upto 100: x:=normaldeviate*4pt+12pt;
  187. y:=floor(x/pt); if unknown count[y]: count[y]:=-1; fi
  188. drawdot(x,pt*incr count[y]); endfor endchar;
  189.  
  190. % skyline (character 127)
  191. randomseed:=2.71828;
  192. beginchar(127,100pt#,10pt#,0);
  193. for n:=0 upto 99:
  194. fill unitsquare xscaled 1pt yscaled uniformdeviate h shifted (n*pt,0);
  195. endfor
  196. endchar;
  197.  
  198. bye
  199.