[1092] | 1 | /* ==========================================================================
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| 2 | * (C) 2006 Universitat Jaume I
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| 3 | * ==========================================================================
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| 4 | * PROYECT: GAME TOOLS
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| 5 | * ==========================================================================*/
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| 6 | /** CONTENT:
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| 7 | *
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| 8 | *
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| 9 | * @file main.cpp
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| 10 | /** COMMENTS:
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| 11 | * Model must be in "media/models" folder.
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| 12 | * Lod file must be in "media/GT" folder.
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| 13 | /*===========================================================================*/
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| 14 | #include "ExampleApplication.h"
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| 15 | #include "GeoLodStripsLibrary.h"
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| 16 | #include "GeoMeshLoader.h"
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| 17 |
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| 18 |
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| 19 | // Distance values
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[1536] | 20 | #define dist_min 1100
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[1555] | 21 | #define dist_max 2500
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[1092] | 22 |
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| 23 | // Model name
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| 24 | #define model_name "dwarf2"
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| 25 |
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| 26 |
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| 27 | //Global variables
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| 28 | Entity* entity;
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| 29 | Geometry::LodStripsLibrary* myStrips;
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| 30 | Ogre::Mesh *ogreMesh=NULL;
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| 31 | Geometry::GeoMeshLoader *meshloader=NULL;
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| 32 | SceneNode* node;
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| 33 |
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| 34 | MaterialPtr *mat;
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| 35 |
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| 36 | ColourValue color=ColourValue::Red;
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| 37 |
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| 38 | Camera* theCam;
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| 39 | Entity* pPlaneEnt;
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| 40 |
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| 41 | OverlayElement* mInfo;
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| 42 | OverlayElement* mInfo2;
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[1561] | 43 | OverlayElement* mHelp;
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[1092] | 44 |
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[1561] | 45 | char HelpString[]="(F1) Help\n"
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| 46 | "This demo shows an example of the LODStrips model in action. The models in the scene\n"
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| 47 | "are associated to a LodStrips object that manage their level of detail.\n"
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| 48 | "The level of detail of the objects depend on the distance to the camera. When the\n"
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| 49 | "camera goes away from them, the level of detail decreases, and when the camera gets\n"
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| 50 | "closer to them the level of detail increases to restore the original geometry of the\n"
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| 51 | "model.\n"
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| 52 | "The current level of detail can be seen in real-time in the top-left corner of the screen.\n"
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| 53 | "The level of detail begins to decrease at a certain distance of the crowd, and stops\n"
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| 54 | "decreasing when the objects reach the their minimum LOD. This 'lodding' distance is\n"
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| 55 | "customizable from the source code of the demo.";
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| 56 |
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| 57 | char NoHelpString[]="(F1) Help\n";
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| 58 |
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| 59 |
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[1529] | 60 | class CustomIndexData : public Geometry::IndexData
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[1092] | 61 | {
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[1529] | 62 | private:
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| 63 | Ogre::Mesh *targetMesh;
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| 64 | Ogre::HardwareIndexBufferSharedPtr ibuf;
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[1092] | 65 | Ogre::RenderOperation mRenderOp;
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[1529] | 66 | unsigned long* pIdx;
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| 67 | public:
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| 68 | CustomIndexData(Ogre::Mesh *ogremesh):Geometry::IndexData(){
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| 69 | targetMesh=ogremesh;
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| 70 | pIdx=NULL;
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| 71 | }
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| 72 | virtual ~CustomIndexData(void){}
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[1092] | 73 |
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[1529] | 74 | virtual void Begin(unsigned int submeshid, unsigned int indexcount){
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| 75 | targetMesh->getSubMesh(submeshid)->_getRenderOperation(mRenderOp,0);
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[1306] | 76 | ibuf = mRenderOp.indexData->indexBuffer;
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[1529] | 77 | mRenderOp.indexData->indexCount = indexcount;
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| 78 | pIdx = static_cast<unsigned long*>(ibuf->lock(Ogre::HardwareBuffer::HBL_NORMAL));
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| 79 | }
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| 80 | virtual void SetIndex(unsigned int i, unsigned int index){
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| 81 | pIdx[i] = index; //lodStripsLib->dataRetrievalInterface->GetIndex(k+offset);
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| 82 | }
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| 83 | virtual void End(){
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| 84 | ibuf->unlock();
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| 85 | }
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| 86 | virtual void BorrowIndexData(const Geometry::IndexData *){}
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| 87 | };
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[1092] | 88 |
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| 89 | class FresnelFrameListener : public ExampleFrameListener
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| 90 | {
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| 91 | int manage;
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| 92 |
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| 93 | public:
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| 94 |
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| 95 | FresnelFrameListener(RenderWindow* win, Camera* cam)
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| 96 | : ExampleFrameListener(win, cam, false, false)
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| 97 | {
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| 98 | manage=1;
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| 99 | }
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| 100 |
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| 101 | bool frameStarted(const FrameEvent& evt)
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| 102 | {
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| 103 | Vector3 dist;
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| 104 | int distance=0,inc2=0,d;
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| 105 | unsigned int nlod,diflods;
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| 106 |
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| 107 | // Move upto 80 units/second
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| 108 | Real MoveFactor = 180.0 * evt.timeSinceLastFrame;
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| 109 |
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| 110 | // Copy the current state of the input devices
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| 111 | mInputDevice->capture();
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| 112 |
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| 113 | // If this is the first frame, pick a speed
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| 114 | if (evt.timeSinceLastFrame == 0)
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| 115 | {
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| 116 | mMoveScale = 1;
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| 117 | mRotScale = 0.1;
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| 118 | }
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| 119 | // Otherwise scale movement units by time passed since last frame
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| 120 | else
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| 121 | {
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| 122 | // Move about 100 units per second,
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| 123 | mMoveScale = mMoveSpeed * evt.timeSinceLastFrame;
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| 124 | // Take about 10 seconds for full rotation
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| 125 | mRotScale = mRotateSpeed * evt.timeSinceLastFrame;
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| 126 | }
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| 127 |
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| 128 | mRotX = 0;
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| 129 | mRotY = 0;
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| 130 | mTranslateVector = Vector3::ZERO;
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| 131 |
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| 132 | //LOD selection
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| 133 | int difdist = dist_max - dist_min;
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| 134 |
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| 135 | int i=0;
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| 136 |
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| 137 | dist = node->getPosition() - mCamera->getPosition();
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| 138 | distance =dist.length();
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| 139 |
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| 140 | float lodfactor = (float)(distance - dist_min) / (float)(dist_max - dist_min);
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| 141 | lodfactor = 1.0f - lodfactor;
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| 142 |
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[1114] | 143 | if (lodfactor<0.0f)
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| 144 | lodfactor=0.0f;
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| 145 | if (lodfactor>1.0f)
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| 146 | lodfactor=1.0f;
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| 147 |
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| 148 | static float lodfactorBefore = -1.0f;
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[1536] | 149 | if (fabsf(lodfactorBefore-lodfactor)>0.03f ||
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[1114] | 150 | (lodfactorBefore>0.0f && lodfactor==0.0f) ||
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| 151 | (lodfactorBefore<1.0f && lodfactor==1.0f))
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[1092] | 152 | {
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| 153 | myStrips->GoToLod(lodfactor);
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[1114] | 154 | lodfactorBefore=lodfactor;
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[1092] | 155 | }
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| 156 |
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| 157 | // Move the node
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[1537] | 158 | if(mInputDevice->isKeyDown(Ogre::KC_UP) ||
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| 159 | mInputDevice->isKeyDown(Ogre::KC_W) ||
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| 160 | mInputDevice->isKeyDown(Ogre::KC_NUMPAD5))
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[1092] | 161 | mTranslateVector.z = -mMoveScale;
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| 162 |
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[1537] | 163 | if(mInputDevice->isKeyDown(Ogre::KC_DOWN) ||
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| 164 | mInputDevice->isKeyDown(Ogre::KC_S) ||
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| 165 | mInputDevice->isKeyDown(Ogre::KC_NUMPAD2))
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[1092] | 166 | mTranslateVector.z = mMoveScale;
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| 167 |
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[1537] | 168 | if (mInputDevice->isKeyDown(Ogre::KC_A) ||
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| 169 | mInputDevice->isKeyDown(Ogre::KC_NUMPAD1))
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| 170 | mTranslateVector.x = -mMoveScale;
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| 171 |
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| 172 | if (mInputDevice->isKeyDown(Ogre::KC_D) ||
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| 173 | mInputDevice->isKeyDown(Ogre::KC_NUMPAD3))
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| 174 | mTranslateVector.x = mMoveScale;
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| 175 |
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[1555] | 176 | /* if (mInputDevice->isKeyDown(Ogre::KC_K))
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| 177 | mCamera->setDetailLevel(SDL_WIREFRAME);*/
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[1537] | 178 |
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[1561] | 179 | static bool newpush = true;
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| 180 | if (!mInputDevice->isKeyDown(Ogre::KC_F1))
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| 181 | newpush = true;
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[1555] | 182 |
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[1561] | 183 | static bool showing_help = false;
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| 184 | if (mInputDevice->isKeyDown(Ogre::KC_F1) && newpush)
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| 185 | {
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| 186 | newpush = false;
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| 187 | if (showing_help = !showing_help)
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| 188 | mHelp->setCaption(HelpString);
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| 189 | else
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| 190 | mHelp->setCaption(NoHelpString);
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| 191 | }
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| 192 |
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[1092] | 193 | if(mInputDevice->isKeyDown(Ogre::KC_LEFT))
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| 194 | mCamera->yaw(mRotScale);
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| 195 |
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| 196 | if(mInputDevice->isKeyDown(Ogre::KC_RIGHT))
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| 197 | mCamera->yaw(-mRotScale);
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| 198 |
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| 199 | if(mInputDevice->isKeyDown(Ogre::KC_ESCAPE))
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| 200 | {
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| 201 | delete myStrips;
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| 202 | delete [] mat;
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| 203 | return false;
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| 204 | }
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| 205 |
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| 206 | if( mInputDevice->getMouseButton( 1 ) )
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| 207 | {
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| 208 | mTranslateVector.x += mInputDevice->getMouseRelativeX() * 0.13;
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| 209 | mTranslateVector.y -= mInputDevice->getMouseRelativeY() * 0.13;
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| 210 | }
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| 211 | else
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| 212 | {
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| 213 | mRotX = Degree(-mInputDevice->getMouseRelativeX() * 0.13);
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| 214 | mRotY = Degree(-mInputDevice->getMouseRelativeY() * 0.13);
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| 215 | }
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| 216 |
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| 217 |
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| 218 | char cadena[256];
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| 219 |
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| 220 |
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| 221 | sprintf(cadena,"Distance: %d",distance);
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| 222 |
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| 223 | mInfo->setCaption(cadena);
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| 224 |
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| 225 | sprintf(cadena,"LOD factor: %f",lodfactor);
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| 226 |
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| 227 | mInfo2->setCaption(cadena);
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| 228 |
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| 229 | mCamera->yaw(mRotX);
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| 230 | mCamera->pitch(mRotY);
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| 231 | mCamera->moveRelative(mTranslateVector);
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| 232 |
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| 233 | return true;
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| 234 | }
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[1561] | 235 |
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[1092] | 236 | };
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| 237 |
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[1536] | 238 | class LodStripsApplication : public ExampleApplication
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[1092] | 239 | {
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| 240 | protected:
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| 241 | public:
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[1536] | 242 | LodStripsApplication() {}
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| 243 | ~LodStripsApplication() {}
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[1092] | 244 |
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| 245 | protected:
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| 246 |
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| 247 | // Just override the mandatory create scene method
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| 248 | void createScene(void)
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| 249 | {
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| 250 | Entity* pEnt;
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| 251 |
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| 252 | mat = new MaterialPtr[1];
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| 253 |
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| 254 | theCam = mCamera;
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[1555] | 255 | theCam->setPosition(0,50,dist_min-600.0f);
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[1092] | 256 | // Set ambient light
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| 257 | mSceneMgr->setAmbientLight(ColourValue(0.3, 0.3, 0.3));
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| 258 |
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[1536] | 259 | // Create a directional light
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[1092] | 260 | Light* l = mSceneMgr->createLight("MainLight");
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| 261 | l->setType(Light::LT_DIRECTIONAL);
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| 262 | l->setDirection(0.0,0.0,-1.0);
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| 263 |
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[1536] | 264 |
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[1092] | 265 | mSceneMgr->setSkyBox(true, "Examples/CloudyNoonSkyBox");
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| 266 |
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| 267 | // My node to which all objects will be attached
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| 268 | SceneNode* myRootNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
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| 269 |
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[1555] | 270 | // Define a floor plane mesh
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| 271 | Plane plane( Vector3::UNIT_Y, 0 );
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[1092] | 272 |
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[1555] | 273 | MeshManager::getSingleton().createPlane("ground",
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| 274 | ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, plane,
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| 275 | 4000,4000,6,6,true,1,10,10,Vector3::UNIT_Z);
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| 276 |
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| 277 | Entity* groundEntity = mSceneMgr->createEntity( "GroundEntity", "ground" );
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| 278 | mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(groundEntity);
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| 279 |
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| 280 | groundEntity->setMaterialName("RockTerrain");
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| 281 | groundEntity->setCastShadows(false);
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| 282 |
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[1092] | 283 | std::string model_file=model_name;
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| 284 | model_file.append(".mesh");
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| 285 |
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| 286 | //Models
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[1128] | 287 | entity = mSceneMgr->createEntity(model_name, "../../../OgreStuff/media/GT/ogrolod.mesh");
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[1092] | 288 | ogreMesh = entity->getMesh().getPointer();
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| 289 |
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| 290 | // load LOD info from the object
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| 291 | meshloader=new Geometry::GeoMeshLoader;
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[1128] | 292 | Geometry::Mesh *themesh = meshloader->load("../../../OgreStuff/media/GT/ogrolod.mesh");
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[1092] | 293 |
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| 294 | node = mSceneMgr->getRootSceneNode()->createChildSceneNode();
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| 295 | node->attachObject( entity );
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[1561] | 296 | node->setVisible(false);
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[1092] | 297 |
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| 298 | std::string lod_file="../../media/GT/";
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| 299 | lod_file.append(model_name);
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| 300 | lod_file.append(".lod");
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| 301 |
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| 302 | if (!meshloader->GetLodStripsData())
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[1113] | 303 | OGRE_EXCEPT(1, "The loaded mesh does not contain any LOD info","LOD Demo");
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[1092] | 304 |
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[1529] | 305 | myStrips = new Geometry::LodStripsLibrary( meshloader->GetLodStripsData(),
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| 306 | themesh,
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| 307 | new CustomIndexData(ogreMesh) );
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[1306] | 308 |
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| 309 | entity->setNormaliseNormals(true);
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[1128] | 310 | entity->setMaterialName("LODStripsDemo/Ogro");
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[1092] | 311 |
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[1536] | 312 | for (int i=-3; i<6; i++) // 7
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| 313 | for (int j=0; j<10; j++) // 4
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[1104] | 314 | {
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| 315 | char newObjName[16]="";
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| 316 | sprintf(newObjName,"arbol_%d_%d",i,j);
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| 317 | Ogre::SceneNode * auxnode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
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[1128] | 318 | Ogre::Entity *auxen = entity->clone(newObjName);
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| 319 | auxnode->attachObject(auxen);
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| 320 | auxnode->rotate(Ogre::Vector3(0,1,0),Ogre::Degree(180.0f),Ogre::Node::TS_WORLD);
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| 321 | auxnode->scale(30.0f,30.0f,30.0f);
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[1104] | 322 | float randomsepx = (float)((rand()%18)-9);
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| 323 | float randomsepy = (float)((rand()%12)-6);
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[1555] | 324 | auxnode->translate(i*70.0f+randomsepx,0.0f,-j*70.0f-randomsepx);
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[1128] | 325 | auxen->setNormaliseNormals(true);
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[1104] | 326 | }
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| 327 |
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[1113] | 328 | node->translate(0,0,-500.0f);
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[1104] | 329 |
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[1092] | 330 | // show overlay
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| 331 | Overlay* pOver = OverlayManager::getSingleton().getByName("Demo_LodStrips/Overlay");
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| 332 | mInfo = OverlayManager::getSingleton().getOverlayElement("Demo_LodStrips/Info_1");
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| 333 | mInfo2 = OverlayManager::getSingleton().getOverlayElement("Demo_LodStrips/Info_2");
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[1561] | 334 | mHelp = OverlayManager::getSingleton().getOverlayElement("Demo_LodStrips/Help");
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| 335 | mHelp->setCaption(NoHelpString);
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[1092] | 336 | pOver->show();
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| 337 |
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| 338 | }
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| 339 |
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| 340 | void createFrameListener(void)
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| 341 | {
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| 342 | mFrameListener= new FresnelFrameListener(mWindow, mCamera);
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| 343 | mFrameListener->showDebugOverlay(true);
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| 344 | mRoot->addFrameListener(mFrameListener);
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| 345 | }
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| 346 |
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| 347 | };
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| 348 |
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| 349 |
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| 350 |
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| 351 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
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| 352 | #define WIN32_LEAN_AND_MEAN
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| 353 | #include "windows.h"
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| 354 | #endif
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| 355 |
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| 356 | #ifdef __cplusplus
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| 357 | extern "C" {
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| 358 | #endif
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| 359 |
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| 360 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
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| 361 | INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
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| 362 | #else
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| 363 | int main(int argc, char **argv)
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| 364 | #endif
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| 365 | {
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| 366 | // Create application object
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[1536] | 367 | LodStripsApplication app;
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[1092] | 368 |
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| 369 | try {
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| 370 | app.go();
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| 371 | } catch( Exception& e ) {
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| 372 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
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| 373 | MessageBox( NULL, e.getFullDescription().c_str(), "An exception has occured!", MB_OK | MB_ICONERROR | MB_TASKMODAL);
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| 374 | #else
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| 375 | std::cerr << "An exception has occured: " << e.getFullDescription();
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| 376 | #endif
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| 377 | }
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| 378 |
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| 379 |
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| 380 | return 0;
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| 381 | }
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| 382 |
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| 383 | #ifdef __cplusplus
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| 384 | }
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| 385 | #endif
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