[2764] | 1 | #include "SceneQuery.h"
|
---|
| 2 | #include "glInterface.h"
|
---|
| 3 | #include "Vector3.h"
|
---|
| 4 | #include "Camera.h"
|
---|
[2778] | 5 | #include "SceneQuery.h"
|
---|
| 6 | #include "RenderTraverser.h"
|
---|
[2800] | 7 | #include <IL/il.h>
|
---|
| 8 | #include <assert.h>
|
---|
[2808] | 9 | #include "RenderTexture.h"
|
---|
[2764] | 10 |
|
---|
| 11 |
|
---|
[2808] | 12 | using namespace std;
|
---|
| 13 |
|
---|
[2809] | 14 | static int texWidth = 2048;
|
---|
| 15 | static int texHeight = 2048;
|
---|
[2808] | 16 |
|
---|
| 17 |
|
---|
| 18 |
|
---|
| 19 | static void PrintGLerror(char *msg)
|
---|
| 20 | {
|
---|
| 21 | GLenum errCode;
|
---|
| 22 | const GLubyte *errStr;
|
---|
| 23 |
|
---|
| 24 | if ((errCode = glGetError()) != GL_NO_ERROR)
|
---|
| 25 | {
|
---|
| 26 | errStr = gluErrorString(errCode);
|
---|
| 27 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
|
---|
| 28 | }
|
---|
| 29 | }
|
---|
| 30 |
|
---|
| 31 |
|
---|
[2800] | 32 | void startil()
|
---|
| 33 | {
|
---|
| 34 | ilInit();
|
---|
| 35 | assert(ilGetError() == IL_NO_ERROR);
|
---|
| 36 | }
|
---|
[2764] | 37 |
|
---|
| 38 |
|
---|
[2800] | 39 | void stopil()
|
---|
| 40 | {
|
---|
| 41 | ilShutDown();
|
---|
| 42 | assert(ilGetError() == IL_NO_ERROR);
|
---|
| 43 | }
|
---|
| 44 |
|
---|
| 45 |
|
---|
[2776] | 46 | namespace CHCDemoEngine
|
---|
[2764] | 47 | {
|
---|
| 48 |
|
---|
| 49 |
|
---|
[2808] | 50 | void GrabDepthBuffer(float *data, RenderTexture *rt)
|
---|
| 51 | {
|
---|
| 52 | rt->BindDepth();
|
---|
| 53 | rt->EnableTextureTarget();
|
---|
[2764] | 54 |
|
---|
[2808] | 55 | const int texFormat = GL_DEPTH_COMPONENT;
|
---|
| 56 | glGetTexImage(rt->GetTextureTarget(), 0, texFormat, GL_FLOAT, data);
|
---|
[2764] | 57 |
|
---|
[2808] | 58 | rt->DisableTextureTarget();
|
---|
| 59 | }
|
---|
[2764] | 60 |
|
---|
| 61 |
|
---|
[2808] | 62 | void ExportDepthBuffer(float *data)
|
---|
| 63 | {
|
---|
| 64 | startil();
|
---|
| 65 |
|
---|
| 66 | ILstring filename = ILstring("depth.tga");
|
---|
| 67 | ilRegisterType(IL_FLOAT);
|
---|
| 68 |
|
---|
| 69 | const int depth = 1;
|
---|
| 70 | const int bpp = 1;
|
---|
| 71 |
|
---|
| 72 | if (!ilTexImage(texWidth, texHeight, depth, bpp, IL_LUMINANCE, IL_FLOAT, data))
|
---|
| 73 | {
|
---|
| 74 | cerr << "IL error " << ilGetError() << endl;
|
---|
| 75 | stopil();
|
---|
| 76 | return;
|
---|
| 77 | }
|
---|
| 78 |
|
---|
| 79 | if (!ilSaveImage(filename))
|
---|
| 80 | {
|
---|
| 81 | cerr << "TGA write error " << ilGetError() << endl;
|
---|
| 82 | }
|
---|
| 83 |
|
---|
| 84 | stopil();
|
---|
| 85 |
|
---|
| 86 | cout << "exported depth buffer" << endl;
|
---|
| 87 | }
|
---|
| 88 |
|
---|
| 89 |
|
---|
[2778] | 90 | SceneQuery::SceneQuery(const AxisAlignedBox3 &sceneBox, RenderTraverser *renderer):
|
---|
[2796] | 91 | mSceneBox(sceneBox), mDepth(NULL)
|
---|
[2764] | 92 | {
|
---|
[2778] | 93 | Prepare(renderer);
|
---|
[2764] | 94 | }
|
---|
| 95 |
|
---|
| 96 |
|
---|
| 97 | bool SceneQuery::CalcIntersection(Vector3 &pt)
|
---|
| 98 | {
|
---|
[2808] | 99 | const int px = (pt.x - mSceneBox.Min(0)) * (texWidth - 1) / mSceneBox.Size(0);
|
---|
| 100 | const int py = (pt.y - mSceneBox.Min(1)) * (texHeight - 1) / mSceneBox.Size(1);
|
---|
[2764] | 101 |
|
---|
[2808] | 102 | float d = mDepth[px + py * texHeight];
|
---|
[2764] | 103 |
|
---|
[2808] | 104 | static float depth = d;
|
---|
[2800] | 105 |
|
---|
| 106 | if (d > 0)
|
---|
[2764] | 107 | {
|
---|
[2808] | 108 | // temporal smoothing of depth values
|
---|
| 109 | const float x = 0.5f;
|
---|
| 110 | depth = d * x + depth * (1.0f - x);
|
---|
[2764] | 111 |
|
---|
[2808] | 112 | const float offs = mSceneBox.Size(2) * 5e-2f;
|
---|
| 113 | pt.z = mSceneBox.Max().z - mSceneBox.Size().z * depth + offs;
|
---|
| 114 |
|
---|
[2764] | 115 | return true;
|
---|
| 116 | }
|
---|
| 117 |
|
---|
| 118 | return false;
|
---|
| 119 | }
|
---|
| 120 |
|
---|
[2778] | 121 |
|
---|
| 122 | void SceneQuery::Prepare(RenderTraverser *renderer)
|
---|
[2764] | 123 | {
|
---|
| 124 | cout << "Preparing scene queries" << endl;
|
---|
| 125 |
|
---|
[2796] | 126 | const float xlen = mSceneBox.Size().x * 0.5f;
|
---|
| 127 | const float ylen = mSceneBox.Size().y * 0.5f;
|
---|
| 128 |
|
---|
| 129 | Camera *orthoCam = new Camera(xlen, ylen);
|
---|
| 130 | orthoCam->SetOrtho(true);
|
---|
[2764] | 131 |
|
---|
| 132 | orthoCam->SetNear(0.0f);
|
---|
[2796] | 133 | orthoCam->Yaw(M_PI * 0.5f);
|
---|
[2764] | 134 |
|
---|
[2796] | 135 | Vector3 pos = Vector3(mSceneBox.Center().x, mSceneBox.Center().y, mSceneBox.Max().z);
|
---|
[2764] | 136 | orthoCam->SetPosition(pos);
|
---|
| 137 |
|
---|
[2809] | 138 | RenderTexture *depthTexture = new RenderTexture(texWidth, texHeight, true, true);
|
---|
| 139 |
|
---|
| 140 | #ifdef ATI
|
---|
| 141 | depthTexture->Initialize(true, true, false, false, false, 8, 8, 8, 8, RenderTexture::RT_COPY_TO_TEXTURE);
|
---|
| 142 | #else
|
---|
| 143 | depthTexture->Initialize(true, true, false, false, false, 8, 8, 8, 8);//, RenderTexture::RT_COPY_TO_TEXTURE);
|
---|
| 144 | #endif
|
---|
| 145 |
|
---|
| 146 | PrintGLerror("Init");
|
---|
| 147 |
|
---|
[2808] | 148 | depthTexture->BeginCapture();
|
---|
[2809] | 149 | {
|
---|
| 150 | glViewport(0, 0, texWidth, texHeight);
|
---|
[2764] | 151 |
|
---|
[2809] | 152 | glClearColor(1, 1, 1, 1);
|
---|
| 153 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
[2764] | 154 |
|
---|
[2809] | 155 | glFrontFace(GL_CCW);
|
---|
| 156 | glCullFace(GL_BACK);
|
---|
[2808] | 157 |
|
---|
[2809] | 158 | glEnable(GL_CULL_FACE);
|
---|
[2808] | 159 |
|
---|
[2809] | 160 | glShadeModel(GL_FLAT);
|
---|
| 161 | glEnable(GL_DEPTH_TEST);
|
---|
[2808] | 162 |
|
---|
[2809] | 163 | glMatrixMode(GL_PROJECTION);
|
---|
| 164 | glLoadIdentity();
|
---|
[2808] | 165 |
|
---|
[2809] | 166 | glOrtho(-xlen, xlen, -ylen, ylen, 0.0f, mSceneBox.Size().z);
|
---|
[2764] | 167 |
|
---|
[2809] | 168 | glMatrixMode(GL_MODELVIEW);
|
---|
[2764] | 169 |
|
---|
[2809] | 170 | orthoCam->SetupCameraView();
|
---|
[2778] | 171 |
|
---|
[2809] | 172 | mDepth = new float[texHeight * texWidth];
|
---|
| 173 |
|
---|
| 174 | //renderer->SetCamera(orthoCam);
|
---|
| 175 | renderer->RenderScene();
|
---|
| 176 | }
|
---|
[2808] | 177 | depthTexture->EndCapture();
|
---|
[2796] | 178 |
|
---|
[2808] | 179 | GrabDepthBuffer(mDepth, depthTexture);
|
---|
| 180 | //ExportDepthBuffer(mDepth);
|
---|
| 181 | //PrintGLerror("grab");
|
---|
[2800] | 182 |
|
---|
[2808] | 183 | DEL_PTR(depthTexture);
|
---|
[2796] | 184 | DEL_PTR(orthoCam);
|
---|
[2764] | 185 | }
|
---|
| 186 |
|
---|
[2808] | 187 |
|
---|
| 188 |
|
---|
| 189 |
|
---|
[2764] | 190 | } |
---|