Changeset 2796 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SceneQuery.cpp

Timestamp:

06/22/08 09:23:45 (16 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SceneQuery.cpp (modified) (3 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SceneQuery.cpp

@@ -18 +18 @@
 
 const static int viewport[4] = {0, 0, 512, 512};
-//static DepthComponent<float> *sDepth = NULL;
+//const static int viewport[4] = {0, 0, 1024, 768};
 
 
 
 SceneQuery::SceneQuery(const AxisAlignedBox3 &sceneBox, RenderTraverser *renderer): 
-mSceneBox(sceneBox)
+mSceneBox(sceneBox), mDepth(NULL)
 {
         Prepare(renderer);
@@ -32 +32 @@
 {
         int px = (pt.x - mSceneBox.Min(0)) * (viewport[2] - 1) / mSceneBox.Size(0);
-        int py = (pt.y - mSceneBox.Min(2)) * (viewport[3] - 1) /  mSceneBox.Size(2);
+        int py = (pt.y - mSceneBox.Min(1)) * (viewport[3] - 1) / mSceneBox.Size(1);
 
-        const float d = 1.0f;// - sDepth->getPixel(px, py);
+        const float d = mDepth[px + py * viewport[1]];
 
         if (d > 0.0f)
         {
-                pt.z = mSceneBox.Size(2) * d + mSceneBox.Min(2);
+                pt.z =  mSceneBox.Min().z + mSceneBox.Size().z * d;
                 cout << "new depth " << pt.z << " (" << d << ")" << endl;
 
@@ -52 +52 @@
         cout << "Preparing scene queries" << endl;
 
-        // center camera on "highest" point
-        Vector3 pos;
-
-        pos.x = mSceneBox.Center(0);
-        pos.y = mSceneBox.Max(1);
-        pos.z = mSceneBox.Center(2);
-
-        // for ortho cam this is the width
-        const Vector3 len = mSceneBox.Size();
-
-        Camera *orthoCam = new Camera(len.x, len.y);
-        //orthoCam->SetOrtho(true);
+        const float xlen = mSceneBox.Size().x * 0.5f;
+        const float ylen = mSceneBox.Size().y * 0.5f;
+        
+        Camera *orthoCam = new Camera(xlen, ylen);
+        orthoCam->SetOrtho(true);
 
         orthoCam->SetNear(0.0f);
-        //orthoCam->SetFar(len.z);
+        orthoCam->Yaw(M_PI * 0.5f);
 
+        Vector3 pos = Vector3(mSceneBox.Center().x, mSceneBox.Center().y, mSceneBox.Max().z);
         orthoCam->SetPosition(pos);
 
-        cout << "fov: " << orthoCam->GetFov() << endl;
-        cout << "near: " << orthoCam->GetNear() << endl;
-        //cout << "far: " << orthoCam->GetFar() << endl;
-        cout << "aspect: " << orthoCam->GetAspect() << endl;
+        glPixelStorei(GL_PACK_ROW_LENGTH, viewport[2]);
 
-        cout << "pos: " << orthoCam->GetPosition() << endl;
-        cout << "view: " << orthoCam->GetDirection() << endl;
-        cout << "up: " << orthoCam->GetUpVector() << endl;
+        // hack: should create offscreen buffer for this
+        glViewport(0, 0, viewport[2], viewport[3]);
 
-        //orthoCam->SetDirection(Vector3(0, 1, 0));
-        //orthoCam->Yaw(M_PI * 0.5f);
+        glMatrixMode(GL_PROJECTION);
+        glLoadIdentity();
         
-        renderer->SetCamera(orthoCam);
+        glOrtho(-xlen, xlen, -ylen, ylen, 0.0f, mSceneBox.Size().z); 
+        
+        glMatrixMode(GL_MODELVIEW);
+        
+        orthoCam->SetupCameraView();
 
-        //OffscreenRenderArea *of = new OffscreenRenderArea();
-        //of->Init(viewport[2], viewport[3]);
+        glClear(GL_DEPTH_BUFFER_BIT);
+
+        mDepth = new float[viewport[2] * viewport[3]];
+
+        //renderer->SetCamera(orthoCam);
 
         renderer->RenderScene();
-        //sDepth = of->GetDepthFloat();
 
-        delete orthoCam;
+        glReadPixels(0, 0, viewport[2], viewport[3], GL_DEPTH_COMPONENT, GL_FLOAT, mDepth);
+
+        DEL_PTR(orthoCam);
 }