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 2000-2005 The OGRE Team
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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 | */
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25 | #include "OgreStableHeaders.h"
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26 |
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27 | #include "OgrePanelOverlayElement.h"
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28 | #include "OgreMaterial.h"
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29 | #include "OgreTechnique.h"
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30 | #include "OgrePass.h"
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31 | #include "OgreStringConverter.h"
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32 | #include "OgreHardwareBufferManager.h"
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33 | #include "OgreRoot.h"
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34 | #include "OgreRenderSystem.h"
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35 |
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36 | namespace Ogre {
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37 | //---------------------------------------------------------------------
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38 | String PanelOverlayElement::msTypeName = "Panel";
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39 | PanelOverlayElement::CmdTiling PanelOverlayElement::msCmdTiling;
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40 | PanelOverlayElement::CmdTransparent PanelOverlayElement::msCmdTransparent;
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41 | PanelOverlayElement::CmdUVCoords PanelOverlayElement::msCmdUVCoords;
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42 | //---------------------------------------------------------------------
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43 | // vertex buffer bindings, set at compile time (we could look these up but no point)
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44 | #define POSITION_BINDING 0
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45 | #define TEXCOORD_BINDING 1
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46 |
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47 | //---------------------------------------------------------------------
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48 | PanelOverlayElement::PanelOverlayElement(const String& name)
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49 | : OverlayContainer(name)
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50 | , mTransparent(false)
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51 | // Defer creation of texcoord buffer until we know how big it needs to be
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52 | , mNumTexCoordsInBuffer(0)
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53 | , mU1(0.0)
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54 | , mV1(0.0)
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55 | , mU2(1.0)
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56 | , mV2(1.0)
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57 |
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58 | {
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59 | // Init tiling
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60 | for (ushort i = 0; i < OGRE_MAX_TEXTURE_COORD_SETS; ++i)
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61 | {
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62 | mTileX[i] = 1.0f;
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63 | mTileY[i] = 1.0f;
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64 | }
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65 |
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66 | // No normals or colours
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67 | if (createParamDictionary("PanelOverlayElement"))
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68 | {
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69 | addBaseParameters();
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70 | }
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71 |
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72 | }
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73 | //---------------------------------------------------------------------
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74 | PanelOverlayElement::~PanelOverlayElement()
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75 | {
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76 | delete mRenderOp.vertexData;
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77 | }
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78 | //---------------------------------------------------------------------
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79 | void PanelOverlayElement::initialise(void)
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80 | {
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81 | bool init = !mInitialised;
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82 |
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83 | OverlayContainer::initialise();
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84 | if (init)
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85 | {
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86 | // Setup render op in advance
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87 | mRenderOp.vertexData = new VertexData();
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88 | // Vertex declaration: 1 position, add texcoords later depending on #layers
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89 | // Create as separate buffers so we can lock & discard separately
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90 | VertexDeclaration* decl = mRenderOp.vertexData->vertexDeclaration;
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91 | decl->addElement(POSITION_BINDING, 0, VET_FLOAT3, VES_POSITION);
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92 |
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93 | // Basic vertex data
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94 | mRenderOp.vertexData->vertexStart = 0;
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95 | mRenderOp.vertexData->vertexCount = 4;
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96 |
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97 | // Vertex buffer #1
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98 | HardwareVertexBufferSharedPtr vbuf =
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99 | HardwareBufferManager::getSingleton().createVertexBuffer(
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100 | decl->getVertexSize(POSITION_BINDING), mRenderOp.vertexData->vertexCount,
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101 | HardwareBuffer::HBU_STATIC_WRITE_ONLY// mostly static except during resizing
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102 | );
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103 | // Bind buffer
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104 | mRenderOp.vertexData->vertexBufferBinding->setBinding(POSITION_BINDING, vbuf);
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105 |
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106 | // No indexes & issue as a strip
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107 | mRenderOp.useIndexes = false;
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108 | mRenderOp.operationType = RenderOperation::OT_TRIANGLE_STRIP;
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109 |
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110 | mInitialised = true;
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111 | }
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112 | }
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113 | //---------------------------------------------------------------------
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114 | void PanelOverlayElement::setTiling(Real x, Real y, ushort layer)
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115 | {
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116 | assert (layer < OGRE_MAX_TEXTURE_COORD_SETS);
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117 | assert (x != 0 && y != 0);
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118 |
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119 | mTileX[layer] = x;
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120 | mTileY[layer] = y;
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121 |
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122 | mGeomUVsOutOfDate = true;
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123 |
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124 | }
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125 | //---------------------------------------------------------------------
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126 | Real PanelOverlayElement::getTileX(ushort layer) const
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127 | {
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128 | return mTileX[layer];
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129 | }
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130 | //---------------------------------------------------------------------
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131 | Real PanelOverlayElement::getTileY(ushort layer) const
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132 | {
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133 | return mTileY[layer];
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134 | }
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135 | //---------------------------------------------------------------------
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136 | void PanelOverlayElement::setTransparent(bool isTransparent)
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137 | {
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138 | mTransparent = isTransparent;
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139 | }
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140 | //---------------------------------------------------------------------
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141 | bool PanelOverlayElement::isTransparent(void) const
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142 | {
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143 | return mTransparent;
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144 | }
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145 | //---------------------------------------------------------------------
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146 | void PanelOverlayElement::setUV(Real u1, Real v1, Real u2, Real v2)
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147 | {
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148 | mU1 = u1;
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149 | mU2 = u2;
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150 | mV1 = v1;
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151 | mV2 = v2;
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152 | mGeomUVsOutOfDate = true;
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153 | }
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154 | void PanelOverlayElement::getUV(Real& u1, Real& v1, Real& u2, Real& v2) const
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155 | {
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156 | u1 = mU1;
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157 | u2 = mU2;
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158 | v1 = mV1;
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159 | v2 = mV2;
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160 | }
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161 | //---------------------------------------------------------------------
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162 | const String& PanelOverlayElement::getTypeName(void) const
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163 | {
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164 | return msTypeName;
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165 | }
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166 | //---------------------------------------------------------------------
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167 | void PanelOverlayElement::getRenderOperation(RenderOperation& op)
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168 | {
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169 | op = mRenderOp;
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170 | }
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171 | //---------------------------------------------------------------------
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172 | void PanelOverlayElement::setMaterialName(const String& matName)
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173 | {
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174 | OverlayContainer::setMaterialName(matName);
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175 | }
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176 | //---------------------------------------------------------------------
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177 | void PanelOverlayElement::_updateRenderQueue(RenderQueue* queue)
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178 | {
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179 | if (mVisible)
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180 | {
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181 |
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182 | if (!mTransparent && !mpMaterial.isNull())
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183 | {
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184 | OverlayElement::_updateRenderQueue(queue);
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185 | }
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186 |
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187 | // Also add children
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188 | ChildIterator it = getChildIterator();
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189 | while (it.hasMoreElements())
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190 | {
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191 | // Give children ZOrder 1 higher than this
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192 | it.getNext()->_updateRenderQueue(queue);
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193 | }
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194 | }
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195 | }
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196 | //---------------------------------------------------------------------
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197 | void PanelOverlayElement::updatePositionGeometry(void)
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198 | {
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199 | /*
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200 | 0-----2
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201 | | /|
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202 | | / |
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203 | |/ |
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204 | 1-----3
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205 | */
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206 | Real left, right, top, bottom;
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207 |
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208 | /* Convert positions into -1, 1 coordinate space (homogenous clip space).
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209 | - Left / right is simple range conversion
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210 | - Top / bottom also need inverting since y is upside down - this means
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211 | that top will end up greater than bottom and when computing texture
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212 | coordinates, we have to flip the v-axis (ie. subtract the value from
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213 | 1.0 to get the actual correct value).
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214 | */
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215 | left = _getDerivedLeft() * 2 - 1;
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216 | right = left + (mWidth * 2);
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217 | top = -((_getDerivedTop() * 2) - 1);
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218 | bottom = top - (mHeight * 2);
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219 |
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220 | HardwareVertexBufferSharedPtr vbuf =
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221 | mRenderOp.vertexData->vertexBufferBinding->getBuffer(POSITION_BINDING);
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222 | float* pPos = static_cast<float*>(
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223 | vbuf->lock(HardwareBuffer::HBL_DISCARD) );
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224 |
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225 | // Use the furthest away depth value, since materials should have depth-check off
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226 | // This initialised the depth buffer for any 3D objects in front
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227 | Real zValue = Root::getSingleton().getRenderSystem()->getMaximumDepthInputValue();
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228 | *pPos++ = left;
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229 | *pPos++ = top;
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230 | *pPos++ = zValue;
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231 |
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232 | *pPos++ = left;
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233 | *pPos++ = bottom;
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234 | *pPos++ = zValue;
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235 |
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236 | *pPos++ = right;
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237 | *pPos++ = top;
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238 | *pPos++ = zValue;
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239 |
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240 | *pPos++ = right;
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241 | *pPos++ = bottom;
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242 | *pPos++ = zValue;
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243 |
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244 | vbuf->unlock();
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245 | }
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246 | //---------------------------------------------------------------------
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247 | void PanelOverlayElement::updateTextureGeometry(void)
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248 | {
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249 | // Generate for as many texture layers as there are in material
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250 | if (!mpMaterial.isNull() && mInitialised)
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251 | {
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252 | // Assume one technique and pass for the moment
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253 | size_t numLayers = mpMaterial->getTechnique(0)->getPass(0)->getNumTextureUnitStates();
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254 |
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255 | VertexDeclaration* decl = mRenderOp.vertexData->vertexDeclaration;
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256 | // Check the number of texcoords we have in our buffer now
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257 | if (mNumTexCoordsInBuffer > numLayers)
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258 | {
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259 | // remove extras
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260 | for (size_t i = mNumTexCoordsInBuffer; i > numLayers; --i)
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261 | {
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262 | decl->removeElement(VES_TEXTURE_COORDINATES, i);
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263 | }
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264 | }
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265 | else if (mNumTexCoordsInBuffer < numLayers)
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266 | {
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267 | // Add extra texcoord elements
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268 | size_t offset = VertexElement::getTypeSize(VET_FLOAT2) * mNumTexCoordsInBuffer;
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269 | for (size_t i = mNumTexCoordsInBuffer; i < numLayers; ++i)
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270 | {
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271 | decl->addElement(TEXCOORD_BINDING,
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272 | offset, VET_FLOAT2, VES_TEXTURE_COORDINATES, i);
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273 | offset += VertexElement::getTypeSize(VET_FLOAT2);
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274 |
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275 | }
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276 | }
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277 |
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278 | // if number of layers changed at all, we'll need to reallocate buffer
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279 | if (mNumTexCoordsInBuffer != numLayers)
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280 | {
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281 | // NB reference counting will take care of the old one if it exists
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282 | HardwareVertexBufferSharedPtr newbuf =
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283 | HardwareBufferManager::getSingleton().createVertexBuffer(
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284 | decl->getVertexSize(TEXCOORD_BINDING), mRenderOp.vertexData->vertexCount,
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285 | HardwareBuffer::HBU_STATIC_WRITE_ONLY // mostly static except during resizing
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286 | );
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287 | // Bind buffer, note this will unbind the old one and destroy the buffer it had
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288 | mRenderOp.vertexData->vertexBufferBinding->setBinding(TEXCOORD_BINDING, newbuf);
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289 | // Set num tex coords in use now
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290 | mNumTexCoordsInBuffer = numLayers;
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291 | }
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292 |
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293 | // Get the tcoord buffer & lock
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294 | if (mNumTexCoordsInBuffer)
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295 | {
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296 | HardwareVertexBufferSharedPtr vbuf =
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297 | mRenderOp.vertexData->vertexBufferBinding->getBuffer(TEXCOORD_BINDING);
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298 | float* pVBStart = static_cast<float*>(
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299 | vbuf->lock(HardwareBuffer::HBL_DISCARD) );
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300 |
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301 | size_t uvSize = VertexElement::getTypeSize(VET_FLOAT2) / sizeof(float);
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302 | size_t vertexSize = decl->getVertexSize(TEXCOORD_BINDING) / sizeof(float);
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303 | for (ushort i = 0; i < numLayers; ++i)
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304 | {
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305 | // Calc upper tex coords
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306 | Real upperX = mU2 * mTileX[i];
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307 | Real upperY = mV2 * mTileY[i];
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308 |
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309 |
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310 | /*
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311 | 0-----2
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312 | | /|
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313 | | / |
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314 | |/ |
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315 | 1-----3
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316 | */
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317 | // Find start offset for this set
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318 | float* pTex = pVBStart + (i * uvSize);
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319 |
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320 | pTex[0] = mU1;
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321 | pTex[1] = mV1;
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322 |
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323 | pTex += vertexSize; // jump by 1 vertex stride
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324 | pTex[0] = mU1;
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325 | pTex[1] = upperY;
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326 |
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327 | pTex += vertexSize;
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328 | pTex[0] = upperX;
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329 | pTex[1] = mV1;
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330 |
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331 | pTex += vertexSize;
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332 | pTex[0] = upperX;
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333 | pTex[1] = upperY;
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334 | }
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335 | vbuf->unlock();
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336 | }
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337 | }
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338 | }
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339 | //-----------------------------------------------------------------------
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340 | void PanelOverlayElement::addBaseParameters(void)
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341 | {
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342 | OverlayContainer::addBaseParameters();
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343 | ParamDictionary* dict = getParamDictionary();
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344 |
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345 | dict->addParameter(ParameterDef("uv_coords",
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346 | "The texture coordinates for the texture. 1 set of uv values."
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347 | , PT_STRING),
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348 | &msCmdUVCoords);
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349 |
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350 | dict->addParameter(ParameterDef("tiling",
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351 | "The number of times to repeat the background texture."
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352 | , PT_STRING),
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353 | &msCmdTiling);
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354 |
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355 | dict->addParameter(ParameterDef("transparent",
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356 | "Sets whether the panel is transparent, i.e. invisible itself "
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357 | "but it's contents are still displayed."
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358 | , PT_BOOL),
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359 | &msCmdTransparent);
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360 | }
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361 | //-----------------------------------------------------------------------
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362 | // Command objects
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363 | //-----------------------------------------------------------------------
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364 | String PanelOverlayElement::CmdTiling::doGet(const void* target) const
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365 | {
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366 | // NB only returns 1st layer tiling
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367 | String ret = "0 " + StringConverter::toString(
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368 | static_cast<const PanelOverlayElement*>(target)->getTileX() );
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369 | ret += " " + StringConverter::toString(
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370 | static_cast<const PanelOverlayElement*>(target)->getTileY() );
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371 | return ret;
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372 | }
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373 | void PanelOverlayElement::CmdTiling::doSet(void* target, const String& val)
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374 | {
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375 | // 3 params: <layer> <x_tile> <y_tile>
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376 | // Param count is validated higher up
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377 | std::vector<String> vec = StringUtil::split(val);
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378 | ushort layer = (ushort)StringConverter::parseUnsignedInt(vec[0]);
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379 | Real x_tile = StringConverter::parseReal(vec[1]);
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380 | Real y_tile = StringConverter::parseReal(vec[2]);
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381 |
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382 | static_cast<PanelOverlayElement*>(target)->setTiling(x_tile, y_tile, layer);
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383 | }
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384 | //-----------------------------------------------------------------------
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385 | String PanelOverlayElement::CmdTransparent::doGet(const void* target) const
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386 | {
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387 | return StringConverter::toString(
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388 | static_cast<const PanelOverlayElement*>(target)->isTransparent() );
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389 | }
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390 | void PanelOverlayElement::CmdTransparent::doSet(void* target, const String& val)
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391 | {
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392 | static_cast<PanelOverlayElement*>(target)->setTransparent(
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393 | StringConverter::parseBool(val));
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394 | }
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395 | //-----------------------------------------------------------------------
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396 | String PanelOverlayElement::CmdUVCoords::doGet(const void* target) const
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397 | {
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398 | Real u1, v1, u2, v2;
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399 |
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400 | static_cast<const PanelOverlayElement*>(target)->getUV(u1, v1, u2, v2);
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401 | String ret = " " + StringConverter::toString(u1) + " "
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402 | + StringConverter::toString(v1) + " " + StringConverter::toString(u2) + " "
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403 | + StringConverter::toString(v2);
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404 |
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405 | return ret;
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406 | }
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407 | void PanelOverlayElement::CmdUVCoords::doSet(void* target, const String& val)
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408 | {
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409 | std::vector<String> vec = StringUtil::split(val);
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410 |
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411 | static_cast<PanelOverlayElement*>(target)->setUV(
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412 | StringConverter::parseReal(vec[0]),
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413 | StringConverter::parseReal(vec[1]),
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414 | StringConverter::parseReal(vec[2]),
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415 | StringConverter::parseReal(vec[3])
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416 | );
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417 | }
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418 |
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419 | }
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420 |
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421 |
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422 |
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