1 | function ResourceGatherer() {}
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2 |
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3 | ResourceGatherer.prototype.Schema =
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4 | "<a:help>Lets the unit gather resources from entities that have the ResourceSupply component.</a:help>" +
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5 | "<a:example>" +
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6 | "<MaxDistance>2.0</MaxDistance>" +
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7 | "<BaseSpeed>1.0</BaseSpeed>" +
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8 | "<Rates>" +
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9 | "<food.fish>1</food.fish>" +
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10 | "<metal.ore>3</metal.ore>" +
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11 | "<stone.rock>3</stone.rock>" +
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12 | "<wood.tree>2</wood.tree>" +
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13 | "</Rates>" +
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14 | "<Capacities>" +
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15 | "<food>10</food>" +
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16 | "<metal>10</metal>" +
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17 | "<stone>10</stone>" +
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18 | "<wood>10</wood>" +
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19 | "</Capacities>" +
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20 | "</a:example>" +
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21 | "<element name='MaxDistance' a:help='Max resource-gathering distance'>" +
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22 | "<ref name='positiveDecimal'/>" +
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23 | "</element>" +
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24 | "<element name='BaseSpeed' a:help='Base resource-gathering rate (in resource units per second)'>" +
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25 | "<ref name='positiveDecimal'/>" +
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26 | "</element>" +
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27 | "<element name='Rates' a:help='Per-resource-type gather rate multipliers. If a resource type is not specified then it cannot be gathered by this unit'>" +
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28 | Resources.BuildSchema("positiveDecimal", [], true) +
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29 | "</element>" +
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30 | "<element name='Capacities' a:help='Per-resource-type maximum carrying capacity'>" +
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31 | Resources.BuildSchema("positiveDecimal") +
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32 | "</element>";
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33 |
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34 | /*
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35 | * Call interval will be determined by gather rate,
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36 | * so always gather integer amount.
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37 | */
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38 | ResourceGatherer.prototype.GATHER_AMOUNT = 1;
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39 |
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40 | ResourceGatherer.prototype.Init = function()
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41 | {
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42 | this.capacities = {};
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43 | this.carrying = {}; // { generic type: integer amount currently carried }
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44 | // (Note that this component supports carrying multiple types of resources,
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45 | // each with an independent capacity, but the rest of the game currently
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46 | // ensures and assumes we'll only be carrying one type at once)
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47 |
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48 | // The last exact type gathered, so we can render appropriate props
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49 | this.lastCarriedType = undefined; // { generic, specific }
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50 | };
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51 |
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52 | /**
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53 | * Returns data about what resources the unit is currently carrying,
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54 | * in the form [ {"type":"wood", "amount":7, "max":10} ]
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55 | */
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56 | ResourceGatherer.prototype.GetCarryingStatus = function()
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57 | {
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58 | let ret = [];
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59 | for (let type in this.carrying)
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60 | {
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61 | ret.push({
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62 | "type": type,
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63 | "amount": this.carrying[type],
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64 | "max": +this.GetCapacity(type)
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65 | });
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66 | }
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67 | return ret;
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68 | };
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69 |
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70 | /**
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71 | * Used to instantly give resources to unit
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72 | * @param resources The same structure as returned form GetCarryingStatus
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73 | */
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74 | ResourceGatherer.prototype.GiveResources = function(resources)
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75 | {
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76 | for (let resource of resources)
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77 | this.carrying[resource.type] = +resource.amount;
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78 |
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79 | Engine.PostMessage(this.entity, MT_ResourceCarryingChanged, { "to": this.GetCarryingStatus() });
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80 | };
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81 |
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82 | /**
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83 | * Returns the generic type of one particular resource this unit is
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84 | * currently carrying, or undefined if none.
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85 | */
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86 | ResourceGatherer.prototype.GetMainCarryingType = function()
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87 | {
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88 | // Return the first key, if any
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89 | for (let type in this.carrying)
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90 | return type;
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91 |
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92 | return undefined;
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93 | };
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94 |
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95 | /**
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96 | * Returns the exact resource type we last picked up, as long as
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97 | * we're still carrying something similar enough, in the form
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98 | * { generic, specific }
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99 | */
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100 | ResourceGatherer.prototype.GetLastCarriedType = function()
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101 | {
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102 | if (this.lastCarriedType && this.lastCarriedType.generic in this.carrying)
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103 | return this.lastCarriedType;
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104 |
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105 | return undefined;
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106 | };
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107 |
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108 | ResourceGatherer.prototype.SetLastCarriedType = function(lastCarriedType)
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109 | {
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110 | this.lastCarriedType = lastCarriedType;
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111 | };
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112 |
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113 | // Since this code is very performancecritical and applying technologies quite slow, cache it.
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114 | ResourceGatherer.prototype.RecalculateGatherRates = function()
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115 | {
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116 | this.baseSpeed = ApplyValueModificationsToEntity("ResourceGatherer/BaseSpeed", +this.template.BaseSpeed, this.entity);
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117 |
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118 | this.rates = {};
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119 | for (let r in this.template.Rates)
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120 | {
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121 | let type = r.split(".");
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122 |
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123 | if (!Resources.GetResource(type[0]).subtypes[type[1]])
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124 | {
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125 | error("Resource subtype not found: " + type[0] + "." + type[1]);
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126 | continue;
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127 | }
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128 |
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129 | let rate = ApplyValueModificationsToEntity("ResourceGatherer/Rates/" + r, +this.template.Rates[r], this.entity);
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130 | this.rates[r] = rate * this.baseSpeed;
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131 | }
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132 | };
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133 |
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134 | ResourceGatherer.prototype.RecalculateCapacities = function()
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135 | {
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136 | this.capacities = {};
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137 | for (let r in this.template.Capacities)
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138 | this.capacities[r] = ApplyValueModificationsToEntity("ResourceGatherer/Capacities/" + r, +this.template.Capacities[r], this.entity);
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139 | };
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140 |
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141 | ResourceGatherer.prototype.RecalculateCapacity = function(type)
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142 | {
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143 | if (type in this.capacities)
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144 | this.capacities[type] = ApplyValueModificationsToEntity("ResourceGatherer/Capacities/" + type, +this.template.Capacities[type], this.entity);
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145 | };
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146 |
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147 | ResourceGatherer.prototype.GetGatherRates = function()
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148 | {
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149 | return this.rates;
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150 | };
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151 |
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152 | ResourceGatherer.prototype.GetGatherRate = function(resourceType)
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153 | {
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154 | if (!this.template.Rates[resourceType])
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155 | return 0;
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156 |
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157 | return this.rates[resourceType];
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158 | };
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159 |
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160 | ResourceGatherer.prototype.GetCapacity = function(resourceType)
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161 | {
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162 | if (!this.template.Capacities[resourceType])
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163 | return 0;
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164 | return this.capacities[resourceType];
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165 | };
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166 |
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167 | ResourceGatherer.prototype.GetRange = function()
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168 | {
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169 | return { "max": +this.template.MaxDistance, "min": 0 };
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170 | };
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171 |
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172 | /**
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173 | * @param {number} target - The target to gather from.
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174 | * @param {number} callerIID - The IID to notify on specific events.
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175 | * @return {boolean} - Whether we started gathering.
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176 | */
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177 | ResourceGatherer.prototype.StartGathering = function(target, callerIID)
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178 | {
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179 | if (this.target)
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180 | this.StopGathering();
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181 |
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182 | let rate = this.GetTargetGatherRate(target);
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183 | if (!rate)
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184 | return false;
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185 |
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186 | let cmpResourceSupply = Engine.QueryInterface(target, IID_ResourceSupply);
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187 | if (!cmpResourceSupply || !cmpResourceSupply.AddActiveGatherer(this.entity))
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188 | return false;
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189 |
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190 | let resourceType = cmpResourceSupply.GetType();
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191 |
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192 | // If we've already got some resources but they're the wrong type,
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193 | // drop them first to ensure we're only ever carrying one type.
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194 | if (this.IsCarryingAnythingExcept(resourceType.generic))
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195 | this.DropResources();
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196 | this.AddToPlayerCounter(resourceType.generic);
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197 |
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198 | let cmpVisual = Engine.QueryInterface(this.entity, IID_Visual);
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199 | if (cmpVisual)
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200 | cmpVisual.SelectAnimation("gather_" + resourceType.specific, false, 1.0);
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201 |
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202 | // Calculate timing based on gather rates.
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203 | // This allows the gather rate to control how often we gather, instead of how much.
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204 | let timing = 1000 / rate;
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205 |
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206 | this.target = target;
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207 | this.callerIID = callerIID;
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208 |
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209 | let cmpTimer = Engine.QueryInterface(SYSTEM_ENTITY, IID_Timer);
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210 | this.timer = cmpTimer.SetInterval(this.entity, IID_ResourceGatherer, "PerformGather", timing, timing, null);
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211 |
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212 | return true;
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213 | };
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214 |
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215 | /**
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216 | * @param {string} reason - The reason why we stopped gathering used to notify the caller.
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217 | */
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218 | ResourceGatherer.prototype.StopGathering = function(reason)
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219 | {
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220 | if (!this.target)
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221 | return;
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222 |
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223 | let cmpTimer = Engine.QueryInterface(SYSTEM_ENTITY, IID_Timer);
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224 | cmpTimer.CancelTimer(this.timer);
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225 | delete this.timer;
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226 |
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227 | let cmpResourceSupply = Engine.QueryInterface(this.target, IID_ResourceSupply);
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228 | if (cmpResourceSupply)
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229 | cmpResourceSupply.RemoveGatherer(this.entity);
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230 | this.RemoveFromPlayerCounter();
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231 |
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232 | delete this.target;
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233 |
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234 | let cmpVisual = Engine.QueryInterface(this.entity, IID_Visual);
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235 | if (cmpVisual)
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236 | cmpVisual.SelectAnimation("idle", false, 1.0);
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237 |
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238 | // The callerIID component may start again,
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239 | // replacing the callerIID, hence save that.
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240 | let callerIID = this.callerIID;
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241 | delete this.callerIID;
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242 |
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243 | if (reason && callerIID)
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244 | {
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245 | let component = Engine.QueryInterface(this.entity, callerIID);
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246 | if (component)
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247 | component.ProcessMessage(reason, null);
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248 | }
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249 | };
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250 |
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251 | /**
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252 | * Gather from our target entity.
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253 | * @params - data and lateness are unused.
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254 | */
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255 | ResourceGatherer.prototype.PerformGather = function(data, lateness)
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256 | {
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257 | let cmpResourceSupply = Engine.QueryInterface(this.target, IID_ResourceSupply);
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258 | if (!cmpResourceSupply || cmpResourceSupply.GetCurrentAmount() <= 0)
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259 | {
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260 | this.StopGathering("TargetInvalidated");
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261 | return;
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262 | }
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263 |
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264 | if (!this.IsTargetInRange(this.target))
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265 | {
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266 | this.StopGathering("OutOfRange");
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267 | return;
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268 | }
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269 |
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270 | // ToDo: Enable entities to keep facing a target.
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271 | Engine.QueryInterface(this.entity, IID_UnitAI)?.FaceTowardsTarget(this.target);
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272 |
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273 | let type = cmpResourceSupply.GetType();
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274 | if (!this.carrying[type.generic])
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275 | this.carrying[type.generic] = 0;
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276 |
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277 | let maxGathered = this.GetCapacity(type.generic) - this.carrying[type.generic];
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278 | let status = cmpResourceSupply.TakeResources(Math.min(this.GATHER_AMOUNT, maxGathered));
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279 | this.carrying[type.generic] += status.amount;
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280 | this.lastCarriedType = type;
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281 |
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282 | // Update stats of how much the player collected.
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283 | // (We have to do it here rather than at the dropsite, because we
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284 | // need to know what subtype it was.)
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285 | let cmpStatisticsTracker = QueryOwnerInterface(this.entity, IID_StatisticsTracker);
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286 | if (cmpStatisticsTracker)
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287 | cmpStatisticsTracker.IncreaseResourceGatheredCounter(type.generic, status.amount, type.specific);
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288 |
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289 | Engine.PostMessage(this.entity, MT_ResourceCarryingChanged, { "to": this.GetCarryingStatus() });
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290 |
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291 | if (!this.CanCarryMore(type.generic))
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292 | this.StopGathering("InventoryFilled");
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293 | else if (status.exhausted)
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294 | this.StopGathering("TargetInvalidated");
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295 | };
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296 |
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297 | /**
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298 | * Compute the amount of resources collected per second from the target.
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299 | * Returns 0 if resources cannot be collected (e.g. the target doesn't
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300 | * exist, or is the wrong type).
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301 | */
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302 | ResourceGatherer.prototype.GetTargetGatherRate = function(target)
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303 | {
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304 | let cmpResourceSupply = QueryMiragedInterface(target, IID_ResourceSupply);
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305 | if (!cmpResourceSupply || cmpResourceSupply.GetCurrentAmount() <= 0)
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306 | return 0;
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307 |
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308 | let type = cmpResourceSupply.GetType();
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309 |
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310 | let rate = 0;
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311 | if (type.specific)
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312 | rate = this.GetGatherRate(type.generic + "." + type.specific);
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313 | if (rate == 0 && type.generic)
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314 | rate = this.GetGatherRate(type.generic);
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315 |
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316 | let diminishingReturns = cmpResourceSupply.GetDiminishingReturns();
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317 | if (diminishingReturns)
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318 | rate *= diminishingReturns;
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319 |
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320 | return rate;
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321 | };
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322 |
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323 | /**
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324 | * @param {number} target - The entity ID of the target to check.
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325 | * @return {boolean} - Whether we can gather from the target.
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326 | */
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327 | ResourceGatherer.prototype.CanGather = function(target)
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328 | {
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329 | return this.GetTargetGatherRate(target) > 0;
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330 | };
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331 |
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332 | /**
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333 | * @param {number} target - The entity ID of the target to check.
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334 | * @return {boolean} - Whether we can gather from the target.
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335 | */
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336 | ResourceGatherer.prototype.CanGather = function(target)
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337 | {
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338 | return this.GetTargetGatherRate(target) > 0;
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339 | };
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340 |
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341 | /**
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342 | * Returns whether this unit can carry more of the given type of resource.
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343 | * (This ignores whether the unit is actually able to gather that
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344 | * resource type or not.)
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345 | */
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346 | ResourceGatherer.prototype.CanCarryMore = function(type)
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347 | {
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348 | let amount = this.carrying[type] || 0;
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349 | return amount < this.GetCapacity(type);
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350 | };
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351 |
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352 |
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353 | ResourceGatherer.prototype.IsCarrying = function(type)
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354 | {
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355 | let amount = this.carrying[type] || 0;
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356 | return amount > 0;
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357 | };
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358 |
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359 | /**
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360 | * Returns whether this unit is carrying any resources of a type that is
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361 | * not the requested type. (This is to support cases where the unit is
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362 | * only meant to be able to carry one type at once.)
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363 | */
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364 | ResourceGatherer.prototype.IsCarryingAnythingExcept = function(exceptedType)
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365 | {
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366 | for (let type in this.carrying)
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367 | if (type != exceptedType)
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368 | return true;
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369 |
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370 | return false;
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371 | };
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372 |
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373 | /**
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374 | * @param {number} target - The entity to check.
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375 | * @param {boolean} checkCarriedResource - Whether we need to check the resource we are carrying.
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376 | * @return {boolean} - Whether we can return carried resources.
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377 | */
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378 | ResourceGatherer.prototype.CanReturnResource = function(target, checkCarriedResource)
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379 | {
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380 | let cmpResourceDropsite = Engine.QueryInterface(target, IID_ResourceDropsite);
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381 | if (!cmpResourceDropsite)
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382 | return false;
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383 |
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384 | if (checkCarriedResource)
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385 | {
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386 | let type = this.GetMainCarryingType();
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387 | if (!type || !cmpResourceDropsite.AcceptsType(type))
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388 | return false;
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389 | }
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390 |
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391 | let cmpOwnership = Engine.QueryInterface(this.entity, IID_Ownership);
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392 | if (cmpOwnership && IsOwnedByPlayer(cmpOwnership.GetOwner(), target))
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393 | return true;
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394 | let cmpPlayer = QueryOwnerInterface(this.entity);
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395 | return cmpPlayer && cmpPlayer.HasSharedDropsites() && cmpResourceDropsite.IsShared() &&
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396 | cmpOwnership && IsOwnedByMutualAllyOfPlayer(cmpOwnership.GetOwner(), target);
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397 | };
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398 |
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399 | /**
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400 | * Transfer our carried resources to our owner immediately.
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401 | * Only resources of the appropriate types will be transferred.
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402 | * (This should typically be called after reaching a dropsite.)
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403 | *
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404 | * @param {number} target - The target entity ID to drop resources at.
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405 | */
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406 | ResourceGatherer.prototype.CommitResources = function(target)
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407 | {
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408 | let cmpResourceDropsite = Engine.QueryInterface(target, IID_ResourceDropsite);
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409 | if (!cmpResourceDropsite)
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410 | return;
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411 |
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412 | let change = cmpResourceDropsite.ReceiveResources(this.carrying, this.entity);
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413 | let changed = false;
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414 | for (let type in change)
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415 | {
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416 | this.carrying[type] -= change[type];
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417 | if (this.carrying[type] == 0)
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418 | delete this.carrying[type];
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419 | changed = true;
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420 | }
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421 |
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422 | if (changed)
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423 | Engine.PostMessage(this.entity, MT_ResourceCarryingChanged, { "to": this.GetCarryingStatus() });
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424 | };
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425 |
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426 | /**
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427 | * Drop all currently-carried resources.
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428 | * (Currently they just vanish after being dropped - we don't bother depositing
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429 | * them onto the ground.)
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430 | */
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431 | ResourceGatherer.prototype.DropResources = function()
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432 | {
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433 | this.carrying = {};
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434 |
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435 | Engine.PostMessage(this.entity, MT_ResourceCarryingChanged, { "to": this.GetCarryingStatus() });
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436 | };
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437 |
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438 |
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439 | /**
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440 | * @param {string} type - A generic resource type.
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441 | */
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442 | ResourceGatherer.prototype.AddToPlayerCounter = function(type)
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443 | {
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444 | // We need to be removed from the player counter first.
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445 | if (this.lastGathered)
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446 | return;
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447 |
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448 | let cmpPlayer = QueryOwnerInterface(this.entity, IID_Player);
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449 | if (cmpPlayer)
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450 | cmpPlayer.AddResourceGatherer(type);
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451 |
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452 | this.lastGathered = type;
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453 | };
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454 |
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455 | /**
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456 | * @param {number} playerid - Optionally a player ID.
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457 | */
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458 | ResourceGatherer.prototype.RemoveFromPlayerCounter = function(playerid)
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459 | {
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460 | if (!this.lastGathered)
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461 | return;
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462 |
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463 | let cmpPlayer = playerid != undefined ?
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464 | QueryPlayerIDInterface(playerid) :
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465 | QueryOwnerInterface(this.entity, IID_Player);
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466 |
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467 | if (cmpPlayer)
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468 | cmpPlayer.RemoveResourceGatherer(this.lastGathered);
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469 |
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470 | delete this.lastGathered;
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471 | };
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472 |
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473 | /**
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474 | * @param {number} - The entity ID of the target to check.
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475 | * @return {boolean} - Whether this entity is in range of its target.
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476 | */
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477 | ResourceGatherer.prototype.IsTargetInRange = function(target)
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478 | {
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479 | return Engine.QueryInterface(SYSTEM_ENTITY, IID_ObstructionManager).
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480 | IsInTargetRange(this.entity, target, 0, +this.template.MaxDistance, false);
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481 | };
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482 |
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483 | // Since we cache gather rates, we need to make sure we update them when tech changes.
|
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484 | // and when our owner change because owners can had different techs.
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485 | ResourceGatherer.prototype.OnValueModification = function(msg)
|
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486 | {
|
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487 | if (msg.component != "ResourceGatherer")
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488 | return;
|
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489 |
|
---|
490 | // NB: at the moment, 0 A.D. always uses the fast path, the other is mod support.
|
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491 | if (msg.valueNames.length === 1)
|
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492 | {
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493 | if (msg.valueNames[0].indexOf("Capacities") !== -1)
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494 | this.RecalculateCapacity(msg.valueNames[0].substr(28));
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495 | else
|
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496 | this.RecalculateGatherRates();
|
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497 | }
|
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498 | else
|
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499 | {
|
---|
500 | this.RecalculateGatherRates();
|
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501 | this.RecalculateCapacities();
|
---|
502 | }
|
---|
503 | };
|
---|
504 |
|
---|
505 | ResourceGatherer.prototype.OnOwnershipChanged = function(msg)
|
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506 | {
|
---|
507 | if (msg.to == INVALID_PLAYER)
|
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508 | {
|
---|
509 | this.RemoveFromPlayerCounter(msg.from);
|
---|
510 | return;
|
---|
511 | }
|
---|
512 |
|
---|
513 | this.RecalculateGatherRates();
|
---|
514 | this.RecalculateCapacities();
|
---|
515 | };
|
---|
516 |
|
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517 | ResourceGatherer.prototype.OnGlobalInitGame = function(msg)
|
---|
518 | {
|
---|
519 | this.RecalculateGatherRates();
|
---|
520 | this.RecalculateCapacities();
|
---|
521 | };
|
---|
522 |
|
---|
523 | ResourceGatherer.prototype.OnMultiplierChanged = function(msg)
|
---|
524 | {
|
---|
525 | let cmpPlayer = QueryOwnerInterface(this.entity, IID_Player);
|
---|
526 | if (cmpPlayer && msg.player == cmpPlayer.GetPlayerID())
|
---|
527 | this.RecalculateGatherRates();
|
---|
528 | };
|
---|
529 |
|
---|
530 | Engine.RegisterComponentType(IID_ResourceGatherer, "ResourceGatherer", ResourceGatherer);
|
---|