annotate client/digitallibrary/jquery/jquery.digilib.geometry.js @ 819:785b9b72f69b stream

new default fullscreen page (uses automagic host selection)
author robcast
date Wed, 23 Feb 2011 16:00:07 +0100
parents 1f9940d4bd35
children 8cfd8223afe6
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1 /** required digilib geometry plugin
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2 */
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3
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4 (function($) {
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5 //var dlGeometry = function() {
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6 /*
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7 * Size class
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8 */
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9 var size = function(w, h) {
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10 var that;
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11 if (typeof w === "object") {
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12 // assume its size
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13 that = {
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14 width : w.width,
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15 height : w.height
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16 };
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17 } else {
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18 that = {
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19 width : parseFloat(w),
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20 height : parseFloat(h)
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21 };
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22 }
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23 that.equals = function(other) {
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24 return (this.width === other.width && this.height === other.height);
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25 };
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26 that.toString = function() {
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27 return (this.width + "x" + this.height);
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28 };
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29 return that;
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30 };
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31
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32 /*
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33 * Position class
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34 */
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35 var position = function(x, y) {
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36 var that;
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37 if (typeof x === "object") {
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38 if (x instanceof jQuery) {
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39 // jQuery object
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40 var pos = x.offset();
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41 that = {
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42 x : pos.left,
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43 y : pos.top
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44 };
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45 } else {
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46 if (x.x != null) {
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47 // position object
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48 that = {
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49 x : x.x,
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50 y : x.y
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51 };
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52 }
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53 if (x.pageX != null) {
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54 // event object
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55 that = {
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56 x : x.pageX,
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57 y : x.pageY
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58 };
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59 }
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60 }
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61 } else {
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62 that = {
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63 x : parseFloat(x),
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64 y : parseFloat(y)
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65 };
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66 }
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67 that.equals = function(other) {
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68 return (this.x === other.x && this.y === other.y);
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69 };
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70 // add position other to this
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71 that.add = function(other) {
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72 this.x += other.x;
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73 this.y += other.y;
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74 return this;
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75 };
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76 // returns negative position
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77 that.neg = function() {
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78 return position({
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79 x : -this.x,
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80 y : -this.y
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81 });
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82 };
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83 // returns new position that is the difference between this and other
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84 that.delta = function(other) {
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85 return position({
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86 x : other.x - this.x,
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87 y : other.y - this.y
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88 });
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89 };
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90 // adjusts position $elem to this position
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91 that.adjustDiv = function($elem) {
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92 $elem.offset({
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93 left : this.x,
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94 top : this.y
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95 });
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96 };
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97 // returns distance of this position to pos (length if pos == null)
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98 that.distance = function(pos) {
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99 if (pos == null) {
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100 pos = {
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101 x : 0,
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102 y : 0
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103 };
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104 }
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105 var dx = pos.x - this.x;
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106 var dy = pos.y - this.y;
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107 return Math.sqrt(dx * dx + dy * dy);
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108 };
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109 that.toString = function() {
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110 return (this.x + "," + this.y);
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111 };
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112 return that;
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113 };
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114 /*
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115 * Rectangle class
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116 */
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117 var rectangle = function(x, y, w, h) {
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118 var that = {};
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119 if (typeof x === "object") {
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120 if (x instanceof jQuery) {
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121 // jQuery object
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122 var pos = x.offset();
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123 that = {
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124 x : pos.left,
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125 y : pos.top,
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126 width : x.width(),
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127 height : x.height()
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128 };
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129 } else if (y == null) {
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130 // assume x is rectangle
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131 that = {
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132 x : x.x,
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133 y : x.y,
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134 width : x.width,
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135 height : x.height
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136 };
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137 } else {
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138 // assume x and y are Position
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139 that = {
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140 x : Math.min(x.x, y.x),
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141 y : Math.min(x.y, y.y),
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142 width : Math.abs(y.x - x.x),
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143 height : Math.abs(y.y - x.y)
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144 };
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145 }
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146 } else {
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147 that = {
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148 x : parseFloat(x),
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149 y : parseFloat(y),
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150 width : parseFloat(w),
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151 height : parseFloat(h)
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152 };
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153 }
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154 // returns a copy of this Rectangle
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155 that.copy = function() {
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156 return rectangle(this);
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157 };
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158 // returns the position of this Rectangle
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159 that.getPosition = function() {
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160 return position(this);
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161 };
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162 // returns the size of this Rectangle
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163 that.getSize = function() {
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164 return size(this);
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165 };
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166 // returns the upper left corner position
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167 that.getPt1 = that.getPosition;
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168 // returns the lower right corner position of this Rectangle
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169 that.getPt2 = function() {
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170 return position({
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171 x : this.x + this.width,
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172 y : this.y + this.height
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173 });
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174 };
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175 // sets the upper left corner position to pos
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176 that.setPosition = function(pos) {
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177 this.x = pos.x;
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178 this.y = pos.y;
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179 return this;
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180 };
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181 // adds pos to the position
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182 that.setPt1 = that.setPosition; // TODO: not really the same
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183 that.addPosition = function(pos) {
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184 this.x += pos.x;
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185 this.y += pos.y;
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186 return this;
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187 };
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188 // sets the lower right corner to position pos
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189 that.setPt2 = function(pos) {
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190 this.width = pos.x - this.x;
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191 this.height = pos.y - this.y;
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192 return this;
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193 };
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194 // returns the center position of this Rectangle
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195 that.getCenter = function() {
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196 return position({
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197 x : this.x + this.width / 2,
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198 y : this.y + this.height / 2
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199 });
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200 };
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201 // moves this rectangle's center to position pos
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202 that.setCenter = function(pos) {
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203 this.x = pos.x - this.width / 2;
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204 this.y = pos.y - this.height / 2;
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205 return this;
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206 };
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207 // returns true if both rectangles have equal position and proportion
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208 that.equals = function(other) {
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209 var eq = (this.x === other.x && this.y === other.y && this.width === other.width);
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210 return eq;
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211 };
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212 // returns the area of this Rectangle
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213 that.getArea = function() {
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214 return (this.width * this.height);
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215 };
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216 // eliminates negative width and height
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217 that.normalize = function() {
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218 var p = this.getPt2();
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
219 this.x = Math.min(this.x, p.x);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
220 this.y = Math.min(this.y, p.y);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
221 this.width = Math.abs(this.width);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
222 this.height = Math.abs(this.height);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
223 return this;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
224 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
225 // returns if Position "pos" lies inside of this rectangle
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
226 that.containsPosition = function(pos) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
227 var ct = ((pos.x >= this.x) && (pos.y >= this.y)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
228 && (pos.x <= this.x + this.width) && (pos.y <= this.y
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
229 + this.height));
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
230 return ct;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
231 };
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
232 // returns true if rectangle "rect" is contained in this rectangle
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
233 that.containsRect = function(rect) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
234 return (this.containsPosition(rect.getPt1()) && this
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
235 .containsPosition(rect.getPt2()));
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
236 };
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
237 // returns true if rectangle "rect" and this rectangle overlap
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
238 that.overlapsRect = function(rect) {
805
1f9940d4bd35 better intersect function
hertzhaft
parents: 800
diff changeset
239 return this.intersect(rect) != null;
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
240 };
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
241 // changes this rectangle's x/y values so it stays inside of rectangle
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
242 // "rect", keeping the proportions
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
243 that.stayInside = function(rect) {
805
1f9940d4bd35 better intersect function
hertzhaft
parents: 800
diff changeset
244 this.x = Math.max(this.x, rect.x);
1f9940d4bd35 better intersect function
hertzhaft
parents: 800
diff changeset
245 this.y = Math.max(this.y, rect.y);
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
246 if (this.x + this.width > rect.x + rect.width) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
247 this.x = rect.x + rect.width - this.width;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
248 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
249 if (this.y + this.height > rect.y + rect.height) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
250 this.y = rect.y + rect.height - this.height;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
251 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
252 return this;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
253 };
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
254 // clips this rectangle so it stays inside of rectangle "rect"
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
255 that.clipTo = function(rect) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
256 var p1 = rect.getPt1();
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
257 var p2 = rect.getPt2();
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
258 var this2 = this.getPt2();
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
259 this.setPosition(position(Math.max(this.x, p1.x), Math.max(this.y, p1.y)));
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
260 this.setPt2(position(Math.min(this2.x, p2.x), Math.min(this2.y, p2.y)));
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
261 return this;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
262 };
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
263 // returns the intersection of rectangle "rect" and this one
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
264 that.intersect = function(rect) {
805
1f9940d4bd35 better intersect function
hertzhaft
parents: 800
diff changeset
265 var res = rect.clipTo(this);
1f9940d4bd35 better intersect function
hertzhaft
parents: 800
diff changeset
266 if (res.width < 0 || res.height < 0) res = null;
1f9940d4bd35 better intersect function
hertzhaft
parents: 800
diff changeset
267 return res;
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
268 };
805
1f9940d4bd35 better intersect function
hertzhaft
parents: 800
diff changeset
269
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
270 // returns a copy of rectangle "rect" that fits into this one
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
271 // (moving it first)
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
272 that.fit = function(rect) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
273 var sec = rect.copy();
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
274 sec.x = Math.max(sec.x, this.x);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
275 sec.y = Math.max(sec.y, this.x);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
276 if (sec.x + sec.width > this.x + this.width) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
277 sec.x = this.x + this.width - sec.width;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
278 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
279 if (sec.y + sec.height > this.y + this.height) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
280 sec.y = this.y + this.height - sec.height;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
281 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
282 return sec.intersect(this);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
283 };
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
284 // adjusts position and size of jQuery element "$elem" to this rectangle
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
285 that.adjustDiv = function($elem) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
286 $elem.offset({
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
287 left : this.x,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
288 top : this.y
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
289 });
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
290 $elem.width(this.width).height(this.height);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
291 };
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
292 // returns position and size of this rectangle in css-compatible format
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
293 that.getAsCss = function() {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
294 return {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
295 left : this.x,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
296 top : this.y,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
297 width : this.width,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
298 height : this.height
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
299 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
300 };
800
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
301 // returns position and size of this rectangle formatted for SVG attributes
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
302 that.getAsSvg = function() {
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
303 return [this.x, this.y, this.width, this.height].join(" ");
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
304 };
ac1d6b056a6f geometry: overlapsRect() plus some comment clarifications
hertzhaft
parents: 786
diff changeset
305 // returns size and position of this rectangle formatted for ??? (w x h@x,y)
778
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
306 that.toString = function() {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
307 return this.width + "x" + this.height + "@" + this.x + "," + this.y;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
308 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
309 return that;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
310 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
311
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
312 /*
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
313 * Transform class
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
314 *
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
315 * defines a class of affine transformations
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
316 */
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
317 var transform = function(spec) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
318 var that = {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
319 m00 : 1.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
320 m01 : 0.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
321 m02 : 0.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
322 m10 : 0.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
323 m11 : 1.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
324 m12 : 0.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
325 m20 : 0.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
326 m21 : 0.0,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
327 m22 : 1.0
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
328 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
329 if (spec) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
330 jQuery.extend(that, spec);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
331 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
332 ;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
333 that.concat = function(trafA) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
334 // add Transform trafA to this Transform (i.e. this = trafC = trafA
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
335 // * this)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
336 var trafC = {};
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
337 for ( var i = 0; i < 3; i++) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
338 for ( var j = 0; j < 3; j++) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
339 var c = 0.0;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
340 for ( var k = 0; k < 3; k++) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
341 c += trafA["m" + i + k] * this["m" + k + j];
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
342 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
343 trafC["m" + i + j] = c;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
344 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
345 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
346 jQuery.extend(this, trafC);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
347 return this;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
348 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
349 that.transform = function(rect) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
350 // returns transformed Rectangle or Position with this Transform
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
351 // applied
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
352 var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
353 var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
354 var pt = position(x, y);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
355 if (rect.width) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
356 // transform the other corner point
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
357 var pt2 = this.transform(rect.getPt2());
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
358 return rectangle(pt, pt2);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
359 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
360 return pt;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
361 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
362 that.invtransform = function(rect) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
363 // returns transformed Rectangle or Position with the inverse of
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
364 // this Transform applied
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
365 var det = this.m00 * this.m11 - this.m01 * this.m10;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
366 var x = (this.m11 * rect.x - this.m01 * rect.y - this.m11
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
367 * this.m02 + this.m01 * this.m12)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
368 / det;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
369 var y = (-this.m10 * rect.x + this.m00 * rect.y + this.m10
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
370 * this.m02 - this.m00 * this.m12)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
371 / det;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
372 var pt = position(x, y);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
373 if (rect.width) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
374 // transform the other corner point
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
375 var pt2 = this.invtransform(rect.getPt2());
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
376 return rectangle(pt, pt2);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
377 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
378 return pt;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
379 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
380 that.toString = function(pretty) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
381 var s = '[';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
382 if (pretty)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
383 s += '\n';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
384 for ( var i = 0; i < 3; ++i) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
385 s += '[';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
386 for ( var j = 0; j < 3; ++j) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
387 if (j)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
388 s += ',';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
389 s += this['m' + i + j];
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
390 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
391 s += ']';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
392 if (pretty)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
393 s += '\n';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
394 }
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
395 s += ']';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
396 if (pretty)
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
397 s += '\n';
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
398 return s;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
399 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
400 // add class methods to instance
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
401 that.getRotation = transform.getRotation;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
402 that.getRotationAround = transform.getRotationAround;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
403 that.getTranslation = transform.getTranslation;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
404 that.getMirror = transform.getMirror;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
405 that.getScale = transform.getScale;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
406
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
407 return that;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
408 };
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
409
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
410 transform.getRotation = function(angle) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
411 // returns a Transform that is a rotation by angle degrees around [0,0]
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
412 if (angle !== 0) {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
413 var t = Math.PI * parseFloat(angle) / 180.0;
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
414 var cost = Math.cos(t);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
415 var sint = Math.sin(t);
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
416 var traf = {
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
417 m00 : cost,
ede54261f87b geometry as first digilib plugin.
robcast
parents:
diff changeset
418 m01 : -sint,
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419 m10 : sint,
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420 m11 : cost
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421 };
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422 return transform(traf);
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423 }
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424 return transform();
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425 };
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426
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427 transform.getRotationAround = function(angle, pos) {
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428 // returns a Transform that is a rotation by angle degrees around pos
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429 var traf = transform.getTranslation(pos.neg());
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430 traf.concat(transform.getRotation(angle));
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431 traf.concat(transform.getTranslation(pos));
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432 return traf;
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433 };
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434
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435 transform.getTranslation = function(pos) {
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436 // returns a Transform that is a translation by [pos.x, pos,y]
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437 var traf = {
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438 m02 : pos.x,
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439 m12 : pos.y
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440 };
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441 return transform(traf);
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442 };
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443
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444 transform.getMirror = function(type) {
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445 // returns a Transform that is a mirror about the axis type
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446 if (type === 'x') {
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447 var traf = {
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448 m00 : 1,
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449 m11 : -1
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450 };
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451 } else {
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452 var traf = {
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453 m00 : -1,
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454 m11 : 1
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455 };
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456 }
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457 return transform(traf);
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458 };
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459
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460 transform.getScale = function(size) {
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461 // returns a Transform that is a scale by [size.width, size.height]
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462 var traf = {
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463 m00 : size.width,
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464 m11 : size.height
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465 };
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466 return transform(traf);
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467 };
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468
779
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469 // export constructor functions to digilib plugin
786
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470 var geometry = {
779
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471 size : size,
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472 position : position,
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473 rectangle : rectangle,
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474 transform : transform
786
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475 };
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476 // install function called by digilib on plugin object
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477 var install = function() {
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478 // add constructor object to fn
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479 this.fn.geometry = geometry;
778
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480 };
786
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481 // digilib plugin object
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482 var plugin = {
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483 name : 'geometry',
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484 install : install,
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485 fn : {},
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486 // TODO: remove old init
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487 init : init
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488 };
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489 // TODO: remove old version of init returning contructor
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490 var init = function () {
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491 return geometry;
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492 };
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493 // plug into digilib
779
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494 if ($.fn.digilib == null) {
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495 $.error("jquery.digilib.geometry must be loaded after jquery.digilib!");
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496 } else {
786
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497 $.fn.digilib('plugin', plugin);
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498 }
778
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499 })(jQuery);