1 | #include "OgreStableHeaders.h"
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2 | #include "OgreSolidBoundingBox.h"
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3 |
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4 | #include "OgreSimpleRenderable.h"
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5 | #include "OgreHardwareBufferManager.h"
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6 | #include "OgreCamera.h"
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7 | //#include <windows.h>
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8 |
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9 | namespace Ogre {
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10 | #define POSITION_BINDING 0
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11 |
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12 | SolidBoundingBox::SolidBoundingBox(): mIsFirstHalf(true)
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13 | {
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14 | mRenderOp.vertexData->vertexCount = 8;
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15 | mRenderOp.operationType = RenderOperation::OT_TRIANGLE_FAN;
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16 | }
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17 | //-----------------------------------------------------------------------
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18 | void SolidBoundingBox::setupBoundingBoxVertices(const AxisAlignedBox& aab) {
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19 |
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20 | Vector3 vmax = aab.getMaximum();
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21 | Vector3 vmin = aab.getMinimum();
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22 |
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23 |
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24 | Real sqLen = std::max(vmax.squaredLength(), vmin.squaredLength());
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25 | mRadius = Math::Sqrt(sqLen);
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26 |
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27 | Real maxx = vmax.x;
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28 | Real maxy = vmax.y;
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29 | Real maxz = vmax.z;
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30 |
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31 | Real minx = vmin.x;
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32 | Real miny = vmin.y;
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33 | Real minz = vmin.z;
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34 |
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35 | // fill in the Vertex buffer: 12 lines with 2 endpoints each make up a box
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36 | HardwareVertexBufferSharedPtr vbuf =
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37 | mRenderOp.vertexData->vertexBufferBinding->getBuffer(POSITION_BINDING);
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38 |
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39 | float* pPos = static_cast<float*>(
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40 | vbuf->lock(HardwareBuffer::HBL_DISCARD));
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41 |
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42 | // 5+------+7 |
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43 | // /| /| |
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44 | // / | / | |
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45 | // / 1+---/--+3 |
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46 | // 2+------+6 / y z |
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47 | // | / | / | / |
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48 | // |/ |/ |/ |
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49 | // 0+------+4 *---x
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50 |
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51 | // fan 1
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52 | if(mIsFirstHalf)
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53 | {
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54 | *pPos++ = minx; *pPos++ = maxy; *pPos++ = maxz; //011
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55 | *pPos++ = minx; *pPos++ = miny; *pPos++ = maxz; //001
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56 | *pPos++ = maxx; *pPos++ = miny; *pPos++ = maxz; //101
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57 | *pPos++ = maxx; *pPos++ = maxy; *pPos++ = maxz; //111
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58 |
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59 | *pPos++ = maxx; *pPos++ = maxy; *pPos++ = minz; //110
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60 | *pPos++ = minx; *pPos++ = maxy; *pPos++ = minz; //010
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61 | *pPos++ = minx; *pPos++ = miny; *pPos++ = minz; //000
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62 | *pPos++ = minx; *pPos++ = miny; *pPos++ = maxz; //001
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63 |
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64 | }
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65 | else
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66 | // fan 2
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67 | {
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68 | *pPos++ = maxx; *pPos++ = miny; *pPos++ = minz; //100
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69 | *pPos++ = minx; *pPos++ = miny; *pPos++ = minz; //000
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70 | *pPos++ = minx; *pPos++ = maxy; *pPos++ = minz; //010
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71 | *pPos++ = maxx; *pPos++ = maxy; *pPos++ = minz; //110
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72 |
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73 | *pPos++ = maxx; *pPos++ = maxy; *pPos++ = maxz; //111
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74 | *pPos++ = maxx; *pPos++ = miny; *pPos++ = maxz; //101
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75 | *pPos++ = minx; *pPos++ = miny; *pPos++ = maxz; //001
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76 | *pPos++ = minx; *pPos++ = miny; *pPos++ = minz; //000
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77 | }
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78 |
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79 | vbuf->unlock();
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80 | }
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81 |
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82 | void SolidBoundingBox::setupBoundingBox(const AxisAlignedBox& aabb)
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83 | {
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84 | // init the vertices to the aabb
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85 | SolidBoundingBox::setupBoundingBoxVertices(aabb);
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86 |
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87 | // setup the bounding box of this SimpleRenderable
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88 | setBoundingBox(aabb);
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89 |
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90 | }
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91 | }
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92 |
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