vanilla-wow-addons – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | --[[ |
2 | -- |
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3 | -- Sea.math |
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4 | -- |
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5 | -- Useful math constants and values |
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6 | -- |
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7 | -- $LastChangedBy: legorol $ |
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8 | -- $Rev: 2845 $ |
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9 | -- $Date: 2005-12-07 21:32:15 -0600 (Wed, 07 Dec 2005) $ |
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10 | --]] |
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11 | |||
12 | Sea.math = { |
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13 | |||
14 | -- Traditional pi |
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15 | pi = math.pi; |
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16 | |||
17 | -- |
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18 | -- rgbaFromHex(string hex) |
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19 | -- |
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20 | -- Convert a hex string "AARRGGBB" into floats |
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21 | -- |
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22 | -- Args: |
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23 | -- (string hex) |
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24 | -- hex - the string in hexidecimal |
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25 | -- |
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26 | -- Returns: |
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27 | -- (Number red, number blue, number green, number alpha) |
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28 | -- |
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29 | rgbaFromHex = function (hexColor) |
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30 | local alpha, red, green, blue = 1; |
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31 | local intFromHex = Sea.math.intFromHex; |
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32 | local ssub = string.sub; |
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33 | -- Handle short strings |
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34 | if ( string.len(hexColor) > 6 ) then |
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35 | alpha = intFromHex(ssub(hexColor, 1, 2)) / 255; |
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36 | red = intFromHex(ssub(hexColor, 3, 4)) / 255; |
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37 | green = intFromHex(ssub(hexColor, 5, 6)) / 255; |
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38 | blue = intFromHex(ssub(hexColor, 7, 8)) / 255; |
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39 | else |
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40 | red = intFromHex(ssub(hexColor, 1, 2)) / 255; |
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41 | green = intFromHex(ssub(hexColor, 3, 4)) / 255; |
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42 | blue = intFromHex(ssub(hexColor, 5, 6)) / 255; |
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43 | end |
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44 | |||
45 | return red, green, blue, alpha; |
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46 | end; |
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47 | |||
48 | -- |
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49 | -- intFromHex(string hex) |
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50 | -- |
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51 | -- Convert a hex string into an integer. |
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52 | -- |
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53 | -- Args: |
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54 | -- (string hex) |
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55 | -- hex - the string in hexidecimal |
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56 | -- |
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57 | -- Returns: |
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58 | -- (number value) |
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59 | -- value - the number as an integer |
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60 | -- |
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61 | -- Recoded by Iriel (iriel@vigilance-committee.org) for performance |
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62 | intFromHex = function ( hexCode ) |
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63 | local intFromHexTable = Sea.math.intFromHexTable; |
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64 | local amount = 0; |
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65 | local len = string.len(hexCode) |
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66 | local ssub = string.sub; |
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67 | local c; |
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68 | for i=1,len do |
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69 | c = ssub(hexCode, i, i); |
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70 | amount = amount * 16 + (intFromHexTable[c] or 0); |
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71 | end |
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72 | return amount; |
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73 | end; |
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74 | |||
75 | intFromHexTable = { |
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76 | ["0"] = 0, ["1"] = 1, ["2"] = 2, ["3"] = 3, ["4"] = 4, |
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77 | ["5"] = 5, ["6"] = 6, ["7"] = 7, ["8"] = 8, ["9"] = 9, |
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78 | ["A"] = 10, ["B"] = 11, ["C"] = 12, |
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79 | ["D"] = 13, ["E"] = 14, ["F"] = 15, |
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80 | ["a"] = 10, ["b"] = 11, ["c"] = 12, |
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81 | ["d"] = 13, ["e"] = 14, ["f"] = 15, |
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82 | }; |
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83 | |||
84 | -- |
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85 | -- hexFromInt(Num int [, minlength]) |
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86 | -- |
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87 | -- Converts a decimal to hex string |
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88 | -- |
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89 | -- Args: |
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90 | -- (Number int) |
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91 | -- int - the value in decimal |
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92 | -- minlength - the zero padding |
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93 | -- |
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94 | -- Returns: |
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95 | -- (String hex) |
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96 | -- hex - the value in hex |
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97 | -- |
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98 | hexFromInt = function (intval, minlength) |
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99 | local fmt = "%.2x" |
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100 | if ( minlength ) then |
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101 | fmt = "%."..minlength.."x"; |
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102 | end |
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103 | return string.format(fmt, intval ); |
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104 | end; |
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105 | |||
106 | |||
107 | -- |
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108 | -- convertBase(string input, int original, int outputBase) |
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109 | ----------------------------------------------------------- |
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110 | -- Function made by KaTTaNa ! -- |
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111 | -- -------------------------- -- |
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112 | -- http://www.wc3sear.ch/index.php?p=JASS&ID=37&sid= -- |
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113 | -- -------------------------- -- |
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114 | -- Converted in LUA by vjeux -- |
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115 | -- -- |
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116 | -- Usage : BaseConversion(255, 10, 16) -- |
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117 | -- => Return "ff" -- |
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118 | -- -- |
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119 | -- Usage : BaseConversion("ff", 16, 10) -- |
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120 | -- => Return "255" -- |
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121 | ----------------------------------------------------------- |
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122 | -- |
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123 | convertBase = function (input, inputBase, outputBase) |
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124 | local charMap = "0123456789abcdefghijklmnopqrstuvwxyz~!@#$%^&*()_+-=[]"; |
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125 | local s; |
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126 | local result = ""; |
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127 | local val = 0; |
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128 | local i; |
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129 | local p = 0; |
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130 | local pow = 1; |
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131 | local sign = ""; |
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132 | |||
133 | if ( inputBase < 2 or inputBase > string.len(charMap) or outputBase < 2 or outputBase > string.len(charMap) ) then |
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134 | -- Bases are invalid or out of bounds |
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135 | return "Invalid bases given"; |
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136 | end |
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137 | if ( string.sub(input, 1, 1) == "-" ) then |
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138 | sign = "-"; |
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139 | input = string.sub(input, 1, string.len(input)); |
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140 | end |
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141 | i = string.len(input); |
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142 | -- Get the integer value of input |
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143 | while (i > 0) do |
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144 | s = string.sub(input, i, i); |
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145 | p = 0; |
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146 | local bool = false; |
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147 | while (bool == false) do |
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148 | if ( p >= inputBase ) then |
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149 | -- Input cannot match base |
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150 | return "Input does not match base!\n P = "..p; |
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151 | end |
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152 | if ( s == string.sub(charMap, p+1, p+1) ) then |
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153 | val = val + pow * p; |
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154 | pow = pow * inputBase; |
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155 | bool = true; |
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156 | end |
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157 | p = p + 1; |
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158 | end |
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159 | i = i - 1; |
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160 | end |
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161 | while (val > 0) do |
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162 | p = math.mod(val, outputBase); |
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163 | result = string.sub(charMap, p+1, p+1)..result; |
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164 | val = val / outputBase; |
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165 | end |
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166 | |||
167 | for i = 1, string.len(result), 1 do |
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168 | if (string.sub(result, 1, 1) == "0") then |
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169 | result = string.sub(result, 2, string.len(result)); |
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170 | else |
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171 | return sign..result |
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172 | end |
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173 | end |
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174 | |||
175 | if (string.len(sign..result) == 0) then |
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176 | return "0"; |
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177 | else |
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178 | return sign..result.."-"..string.len(sign..result); |
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179 | end |
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180 | end; |
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181 | |||
182 | |||
183 | -- round(float x) |
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184 | -- |
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185 | -- Rounds a float value to the "closest" integer (following IEEE standard). |
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186 | -- |
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187 | -- Args: |
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188 | -- (float x) |
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189 | -- x - the value to round |
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190 | -- |
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191 | -- Returns: |
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192 | -- (number value) |
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193 | -- value - the number as an integer (the closest integer to x) |
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194 | round = function (x) |
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195 | if (x < 0) then |
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196 | return math.ceil(x-0.5) |
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197 | else |
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198 | return math.floor(x+0.5) |
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199 | end |
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200 | end |
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201 | |||
202 | }; |