1 | /* |
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2 | ----------------------------------------------------------------------------- |
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3 | This source file is part of OGRE |
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4 | (Object-oriented Graphics Rendering Engine) |
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5 | For the latest info, see http://www.ogre3d.org/ |
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6 | |
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7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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8 | Also see acknowledgements in Readme.html |
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9 | |
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10 | This program is free software; you can redistribute it and/or modify it under |
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11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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12 | Foundation; either version 2 of the License, or (at your option) any later |
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13 | version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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18 | |
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19 | You should have received a copy of the GNU Lesser General Public License along with |
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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22 | http://www.gnu.org/copyleft/lesser.txt. |
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23 | |
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24 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | #include "OgreStableHeaders.h" |
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30 | #include "OgreRibbonTrail.h" |
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31 | #include "OgreMath.h" |
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32 | #include "OgreException.h" |
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33 | #include "OgreSceneNode.h" |
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34 | #include "OgreStringConverter.h" |
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35 | |
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36 | namespace Ogre |
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37 | { |
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38 | namespace |
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39 | { |
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40 | /** Controller value for pass frame time to RibbonTrail |
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41 | */ |
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42 | class _OgrePrivate TimeControllerValue : public ControllerValue<Real> |
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43 | { |
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44 | protected: |
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45 | RibbonTrail* mTrail; |
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46 | public: |
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47 | TimeControllerValue(RibbonTrail* r) { mTrail = r; } |
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48 | |
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49 | Real getValue(void) const { return 0; }// not a source |
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50 | void setValue(Real value) { mTrail->_timeUpdate(value); } |
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51 | }; |
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52 | } |
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53 | //----------------------------------------------------------------------- |
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54 | //----------------------------------------------------------------------- |
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55 | RibbonTrail::RibbonTrail(const String& name, size_t maxElements, |
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56 | size_t numberOfChains, bool useTextureCoords, bool useColours) |
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57 | :BillboardChain(name, maxElements, 0, useTextureCoords, useColours, true), |
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58 | mFadeController(0) |
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59 | { |
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60 | setTrailLength(100); |
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61 | setNumberOfChains(numberOfChains); |
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62 | mTimeControllerValue = ControllerValueRealPtr(new TimeControllerValue(this)); |
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63 | |
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64 | // use V as varying texture coord, so we can use 1D textures to 'smear' |
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65 | setTextureCoordDirection(TCD_V); |
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66 | |
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67 | |
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68 | } |
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69 | //----------------------------------------------------------------------- |
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70 | RibbonTrail::~RibbonTrail() |
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71 | { |
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72 | // Detach listeners |
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73 | for (NodeList::iterator i = mNodeList.begin(); i != mNodeList.end(); ++i) |
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74 | { |
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75 | (*i)->setListener(0); |
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76 | } |
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77 | |
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78 | if (mFadeController) |
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79 | { |
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80 | // destroy controller |
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81 | ControllerManager::getSingleton().destroyController(mFadeController); |
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82 | } |
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83 | |
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84 | } |
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85 | //----------------------------------------------------------------------- |
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86 | void RibbonTrail::addNode(Node* n) |
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87 | { |
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88 | if (mNodeList.size() == mChainCount) |
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89 | { |
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90 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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91 | mName + " cannot monitor any more nodes, chain count exceeded", |
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92 | "RibbonTrail::addNode"); |
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93 | } |
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94 | if (n->getListener()) |
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95 | { |
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96 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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97 | mName + " cannot monitor node " + n->getName() + " since it already has a listener.", |
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98 | "RibbonTrail::addNode"); |
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99 | } |
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100 | |
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101 | // initialise the chain |
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102 | resetTrail(mNodeList.size(), n); |
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103 | |
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104 | mNodeList.push_back(n); |
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105 | n->setListener(this); |
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106 | |
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107 | } |
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108 | //----------------------------------------------------------------------- |
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109 | void RibbonTrail::removeNode(Node* n) |
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110 | { |
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111 | NodeList::iterator i = std::find(mNodeList.begin(), mNodeList.end(), n); |
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112 | if (i != mNodeList.end()) |
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113 | { |
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114 | n->setListener(0); |
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115 | mNodeList.erase(i); |
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116 | } |
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117 | } |
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118 | //----------------------------------------------------------------------- |
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119 | RibbonTrail::NodeIterator |
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120 | RibbonTrail::getNodeIterator(void) const |
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121 | { |
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122 | return NodeIterator(mNodeList.begin(), mNodeList.end()); |
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123 | } |
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124 | //----------------------------------------------------------------------- |
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125 | void RibbonTrail::setTrailLength(Real len) |
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126 | { |
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127 | mTrailLength = len; |
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128 | mElemLength = mTrailLength / mMaxElementsPerChain; |
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129 | mSquaredElemLength = mElemLength * mElemLength; |
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130 | } |
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131 | //----------------------------------------------------------------------- |
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132 | void RibbonTrail::setMaxChainElements(size_t maxElements) |
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133 | { |
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134 | BillboardChain::setMaxChainElements(maxElements); |
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135 | mElemLength = mTrailLength / mMaxElementsPerChain; |
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136 | mSquaredElemLength = mElemLength * mElemLength; |
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137 | |
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138 | resetAllTrails(); |
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139 | } |
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140 | //----------------------------------------------------------------------- |
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141 | void RibbonTrail::setNumberOfChains(size_t numChains) |
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142 | { |
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143 | if (numChains < mNodeList.size()) |
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144 | { |
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145 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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146 | "Can't shrink the number of chains less than number of tracking nodes", |
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147 | "RibbonTrail::setNumberOfChains"); |
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148 | } |
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149 | |
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150 | BillboardChain::setNumberOfChains(numChains); |
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151 | |
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152 | mInitialColour.resize(numChains, ColourValue::White); |
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153 | mDeltaColour.resize(numChains, ColourValue::ZERO); |
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154 | mInitialWidth.resize(numChains, 10); |
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155 | mDeltaWidth.resize(numChains, 0); |
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156 | |
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157 | resetAllTrails(); |
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158 | } |
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159 | //----------------------------------------------------------------------- |
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160 | void RibbonTrail::clearChain(size_t chainIndex) |
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161 | { |
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162 | BillboardChain::clearChain(chainIndex); |
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163 | |
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164 | // Reset if we are tracking for this chain |
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165 | if (chainIndex < mNodeList.size()) |
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166 | { |
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167 | resetTrail(chainIndex, mNodeList[chainIndex]); |
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168 | } |
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169 | } |
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170 | //----------------------------------------------------------------------- |
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171 | void RibbonTrail::setInitialColour(size_t chainIndex, const ColourValue& col) |
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172 | { |
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173 | setInitialColour(chainIndex, col.r, col.g, col.b, col.a); |
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174 | } |
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175 | //----------------------------------------------------------------------- |
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176 | void RibbonTrail::setInitialColour(size_t chainIndex, Real r, Real g, Real b, Real a) |
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177 | { |
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178 | if (chainIndex >= mChainCount) |
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179 | { |
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180 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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181 | "chainIndex out of bounds", "RibbonTrail::setInitialColour"); |
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182 | } |
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183 | mInitialColour[chainIndex].r = r; |
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184 | mInitialColour[chainIndex].g = g; |
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185 | mInitialColour[chainIndex].b = b; |
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186 | mInitialColour[chainIndex].a = a; |
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187 | } |
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188 | //----------------------------------------------------------------------- |
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189 | const ColourValue& RibbonTrail::getInitialColour(size_t chainIndex) const |
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190 | { |
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191 | if (chainIndex >= mChainCount) |
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192 | { |
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193 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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194 | "chainIndex out of bounds", "RibbonTrail::getInitialColour"); |
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195 | } |
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196 | return mInitialColour[chainIndex]; |
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197 | } |
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198 | //----------------------------------------------------------------------- |
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199 | void RibbonTrail::setInitialWidth(size_t chainIndex, Real width) |
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200 | { |
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201 | if (chainIndex >= mChainCount) |
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202 | { |
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203 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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204 | "chainIndex out of bounds", "RibbonTrail::setInitialWidth"); |
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205 | } |
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206 | mInitialWidth[chainIndex] = width; |
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207 | } |
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208 | //----------------------------------------------------------------------- |
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209 | Real RibbonTrail::getInitialWidth(size_t chainIndex) const |
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210 | { |
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211 | if (chainIndex >= mChainCount) |
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212 | { |
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213 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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214 | "chainIndex out of bounds", "RibbonTrail::getInitialWidth"); |
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215 | } |
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216 | return mInitialWidth[chainIndex]; |
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217 | } |
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218 | //----------------------------------------------------------------------- |
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219 | void RibbonTrail::setColourChange(size_t chainIndex, const ColourValue& valuePerSecond) |
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220 | { |
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221 | setColourChange(chainIndex, |
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222 | valuePerSecond.r, valuePerSecond.g, valuePerSecond.b, valuePerSecond.a); |
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223 | } |
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224 | //----------------------------------------------------------------------- |
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225 | void RibbonTrail::setColourChange(size_t chainIndex, Real r, Real g, Real b, Real a) |
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226 | { |
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227 | if (chainIndex >= mChainCount) |
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228 | { |
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229 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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230 | "chainIndex out of bounds", "RibbonTrail::setColourChange"); |
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231 | } |
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232 | mDeltaColour[chainIndex].r = r; |
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233 | mDeltaColour[chainIndex].g = g; |
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234 | mDeltaColour[chainIndex].b = b; |
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235 | mDeltaColour[chainIndex].a = a; |
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236 | |
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237 | manageController(); |
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238 | |
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239 | } |
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240 | //----------------------------------------------------------------------- |
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241 | const ColourValue& RibbonTrail::getColourChange(size_t chainIndex) const |
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242 | { |
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243 | if (chainIndex >= mChainCount) |
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244 | { |
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245 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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246 | "chainIndex out of bounds", "RibbonTrail::getColourChange"); |
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247 | } |
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248 | return mDeltaColour[chainIndex]; |
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249 | } |
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250 | //----------------------------------------------------------------------- |
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251 | void RibbonTrail::setWidthChange(size_t chainIndex, Real widthDeltaPerSecond) |
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252 | { |
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253 | if (chainIndex >= mChainCount) |
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254 | { |
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255 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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256 | "chainIndex out of bounds", "RibbonTrail::setWidthChange"); |
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257 | } |
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258 | mDeltaWidth[chainIndex] = widthDeltaPerSecond; |
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259 | manageController(); |
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260 | } |
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261 | //----------------------------------------------------------------------- |
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262 | Real RibbonTrail::getWidthChange(size_t chainIndex) const |
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263 | { |
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264 | if (chainIndex >= mChainCount) |
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265 | { |
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266 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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267 | "chainIndex out of bounds", "RibbonTrail::getWidthChange"); |
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268 | } |
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269 | return mDeltaWidth[chainIndex]; |
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270 | |
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271 | } |
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272 | //----------------------------------------------------------------------- |
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273 | void RibbonTrail::manageController(void) |
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274 | { |
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275 | bool needController = false; |
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276 | for (size_t i = 0; i < mChainCount; ++i) |
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277 | { |
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278 | if (mDeltaWidth[i] != 0 || mDeltaColour[i] != ColourValue::ZERO) |
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279 | { |
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280 | needController = true; |
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281 | break; |
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282 | } |
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283 | } |
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284 | if (!mFadeController && needController) |
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285 | { |
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286 | // Set up fading via frame time controller |
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287 | ControllerManager& mgr = ControllerManager::getSingleton(); |
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288 | mFadeController = mgr.createFrameTimePassthroughController(mTimeControllerValue); |
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289 | } |
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290 | else if (mFadeController && !needController) |
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291 | { |
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292 | // destroy controller |
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293 | ControllerManager::getSingleton().destroyController(mFadeController); |
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294 | mFadeController = 0; |
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295 | } |
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296 | |
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297 | } |
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298 | //----------------------------------------------------------------------- |
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299 | void RibbonTrail::nodeUpdated(const Node* node) |
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300 | { |
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301 | |
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302 | for (size_t idx = 0; idx < mNodeList.size(); ++idx) |
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303 | { |
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304 | if (mNodeList[idx] == node) |
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305 | { |
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306 | updateTrail(idx, node); |
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307 | break; |
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308 | } |
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309 | } |
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310 | } |
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311 | //----------------------------------------------------------------------- |
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312 | void RibbonTrail::nodeDestroyed(const Node* node) |
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313 | { |
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314 | removeNode(const_cast<Node*>(node)); |
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315 | |
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316 | } |
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317 | //----------------------------------------------------------------------- |
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318 | void RibbonTrail::updateTrail(size_t index, const Node* node) |
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319 | { |
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320 | // Repeat this entire process if chain is stretched beyond its natural length |
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321 | bool done = false; |
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322 | while (!done) |
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323 | { |
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324 | // Node has changed somehow, we're only interested in the derived position |
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325 | ChainSegment& seg = mChainSegmentList[index]; |
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326 | Element& headElem = mChainElementList[seg.start + seg.head]; |
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327 | size_t nextElemIdx = seg.head + 1; |
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328 | // wrap |
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329 | if (nextElemIdx == mMaxElementsPerChain) |
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330 | nextElemIdx = 0; |
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331 | Element& nextElem = mChainElementList[seg.start + nextElemIdx]; |
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332 | |
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333 | // Vary the head elem, but bake new version if that exceeds element len |
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334 | Vector3 newPos = node->_getDerivedPosition(); |
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335 | if (mParentNode) |
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336 | { |
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337 | // Transform position to ourself space |
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338 | newPos = mParentNode->_getDerivedOrientation().UnitInverse() * |
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339 | (newPos - mParentNode->_getDerivedPosition()) / mParentNode->_getDerivedScale(); |
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340 | } |
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341 | Vector3 diff = newPos - nextElem.position; |
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342 | Real sqlen = diff.squaredLength(); |
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343 | if (sqlen >= mSquaredElemLength) |
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344 | { |
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345 | // Move existing head to mElemLength |
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346 | Vector3 scaledDiff = diff * (mElemLength / Math::Sqrt(sqlen)); |
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347 | headElem.position = nextElem.position + scaledDiff; |
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348 | // Add a new element to be the new head |
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349 | Element newElem(newPos, mInitialWidth[index], 0.0f, mInitialColour[index]); |
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350 | addChainElement(index, newElem); |
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351 | // alter diff to represent new head size |
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352 | diff = newPos - headElem.position; |
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353 | // check whether another step is needed or not |
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354 | if (diff.squaredLength() <= mSquaredElemLength) |
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355 | done = true; |
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356 | |
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357 | } |
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358 | else |
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359 | { |
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360 | // Extend existing head |
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361 | headElem.position = newPos; |
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362 | done = true; |
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363 | } |
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364 | |
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365 | // Is this segment full? |
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366 | if ((seg.tail + 1) % mMaxElementsPerChain == seg.head) |
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367 | { |
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368 | // If so, shrink tail gradually to match head extension |
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369 | Element& tailElem = mChainElementList[seg.start + seg.tail]; |
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370 | size_t preTailIdx; |
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371 | if (seg.tail == 0) |
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372 | preTailIdx = mMaxElementsPerChain - 1; |
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373 | else |
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374 | preTailIdx = seg.tail - 1; |
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375 | Element& preTailElem = mChainElementList[seg.start + preTailIdx]; |
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376 | |
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377 | // Measure tail diff from pretail to tail |
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378 | Vector3 taildiff = tailElem.position - preTailElem.position; |
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379 | Real taillen = taildiff.length(); |
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380 | if (taillen > 1e-06) |
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381 | { |
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382 | Real tailsize = mElemLength - diff.length(); |
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383 | taildiff *= tailsize / taillen; |
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384 | tailElem.position = preTailElem.position + taildiff; |
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385 | } |
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386 | |
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387 | } |
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388 | } // end while |
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389 | |
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390 | |
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391 | mBoundsDirty = true; |
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392 | // Need to dirty the parent node, but can't do it using needUpdate() here |
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393 | // since we're in the middle of the scene graph update (node listener), |
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394 | // so re-entrant calls don't work. Queue. |
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395 | if (mParentNode) |
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396 | { |
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397 | Node::queueNeedUpdate(getParentSceneNode()); |
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398 | } |
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399 | |
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400 | } |
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401 | //----------------------------------------------------------------------- |
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402 | void RibbonTrail::_timeUpdate(Real time) |
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403 | { |
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404 | // Apply all segment effects |
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405 | for (size_t s = 0; s < mChainSegmentList.size(); ++s) |
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406 | { |
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407 | ChainSegment& seg = mChainSegmentList[s]; |
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408 | if (seg.head != SEGMENT_EMPTY && seg.head != seg.tail) |
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409 | { |
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410 | |
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411 | for(size_t e = seg.head + 1;; ++e) // until break |
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412 | { |
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413 | e = e % mMaxElementsPerChain; |
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414 | |
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415 | Element& elem = mChainElementList[seg.start + e]; |
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416 | elem.width = elem.width - (time * mDeltaWidth[s]); |
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417 | elem.width = std::max(Real(0.0f), elem.width); |
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418 | elem.colour = elem.colour - (mDeltaColour[s] * time); |
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419 | elem.colour.saturate(); |
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420 | |
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421 | if (e == seg.tail) |
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422 | break; |
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423 | |
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424 | } |
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425 | } |
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426 | |
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427 | } |
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428 | |
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429 | } |
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430 | //----------------------------------------------------------------------- |
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431 | void RibbonTrail::resetTrail(size_t index, const Node* node) |
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432 | { |
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433 | assert(index < mChainCount); |
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434 | |
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435 | ChainSegment& seg = mChainSegmentList[index]; |
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436 | // set up this segment |
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437 | seg.head = seg.tail = SEGMENT_EMPTY; |
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438 | // Create new element, v coord is always 0.0f |
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439 | Element e(node->_getDerivedPosition(), |
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440 | mInitialWidth[index], 0.0f, mInitialColour[index]); |
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441 | // Add the start position |
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442 | addChainElement(index, e); |
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443 | // Add another on the same spot, this will extend |
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444 | addChainElement(index, e); |
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445 | } |
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446 | //----------------------------------------------------------------------- |
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447 | void RibbonTrail::resetAllTrails(void) |
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448 | { |
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449 | for (size_t i = 0; i < mNodeList.size(); ++i) |
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450 | { |
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451 | resetTrail(i, mNodeList[i]); |
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452 | } |
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453 | } |
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454 | //----------------------------------------------------------------------- |
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455 | const String& RibbonTrail::getMovableType(void) const |
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456 | { |
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457 | return RibbonTrailFactory::FACTORY_TYPE_NAME; |
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458 | } |
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459 | //----------------------------------------------------------------------- |
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460 | //----------------------------------------------------------------------- |
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461 | String RibbonTrailFactory::FACTORY_TYPE_NAME = "RibbonTrail"; |
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462 | //----------------------------------------------------------------------- |
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463 | const String& RibbonTrailFactory::getType(void) const |
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464 | { |
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465 | return FACTORY_TYPE_NAME; |
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466 | } |
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467 | //----------------------------------------------------------------------- |
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468 | MovableObject* RibbonTrailFactory::createInstanceImpl( const String& name, |
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469 | const NameValuePairList* params) |
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470 | { |
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471 | size_t maxElements = 20; |
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472 | size_t numberOfChains = 1; |
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473 | bool useTex = true; |
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474 | bool useCol = true; |
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475 | // optional params |
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476 | if (params != 0) |
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477 | { |
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478 | NameValuePairList::const_iterator ni = params->find("maxElements"); |
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479 | if (ni != params->end()) |
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480 | { |
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481 | maxElements = StringConverter::parseUnsignedLong(ni->second); |
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482 | } |
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483 | ni = params->find("numberOfChains"); |
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484 | if (ni != params->end()) |
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485 | { |
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486 | numberOfChains = StringConverter::parseUnsignedLong(ni->second); |
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487 | } |
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488 | ni = params->find("useTextureCoords"); |
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489 | if (ni != params->end()) |
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490 | { |
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491 | useTex = StringConverter::parseBool(ni->second); |
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492 | } |
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493 | ni = params->find("useVertexColours"); |
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494 | if (ni != params->end()) |
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495 | { |
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496 | useCol = StringConverter::parseBool(ni->second); |
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497 | } |
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498 | |
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499 | } |
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500 | |
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501 | return new RibbonTrail(name, maxElements, numberOfChains, useTex, useCol); |
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502 | |
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503 | } |
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504 | //----------------------------------------------------------------------- |
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505 | void RibbonTrailFactory::destroyInstance( MovableObject* obj) |
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506 | { |
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507 | delete obj; |
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508 | } |
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509 | |
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510 | |
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511 | |
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512 | |
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513 | } |
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514 | |
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