Changeset 2943

Timestamp:

09/13/08 15:00:11 (16 years ago)

Author:

mattausch

Message:

shadows working nicely

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling/src

Files:

• Polyhedron.cpp (modified) (3 diffs)
• RenderState.cpp (modified) (4 diffs)
• RenderState.h (modified) (2 diffs)
• ShadowMapping.cpp (modified) (21 diffs)
• ShadowMapping.h (modified) (1 diff)
• chcdemo.cpp (modified) (5 diffs)
• shaders/deferred.cg (modified) (1 diff)

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

@@ -268 +268 @@
         planePoly = SplitPolygon(planePoly);
 
-        // something is wrong, probably some numerical error
-        if (!planePoly) 
-        { 
-                cerr << "should not happen" << endl; 
+        if (planePoly) 
+        {
+                // we can now savely add the new polygon
+                clippedPolyhedron->Add(planePoly);
+        }
+        else if (0)
+        {
+                // something is wrong, probably some numerical error
+                cerr << "no polygon: should not happen" << endl; 
                 return new Polyhedron(*this); 
         }
-
+        
 
         /////////////
@@ -317 +322 @@
         }
 
-        // we can now savely add the new polygon
-        clippedPolyhedron->Add(planePoly);
-
         return clippedPolyhedron;
 }
@@ -357 +359 @@
                                 break;
                         case Polygon3::FRONT_SIDE:
-                                cerr << "SplitPolygon: should not come here" << endl;
+                                //cerr << "SplitPolygon: should not come here" << endl;
                                 DEL_PTR(polygon);
                 break;

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

@@ -22 +22 @@
 mTexturesEnabled(false), 
 mMode(RENDER),
-mRenderType(FIXED)
+mRenderType(FIXED),
+mUseAlphaToCoverage(true)
 {
         Reset(); 
@@ -96 +97 @@
                 mAlphaTestEnabled = false;
                 
-                // not needed with GL_SAMPLE_ALPHA_TO_COVERAGE_ARB
-                //glDisable(GL_ALPHA_TEST);
-                glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
+                if (mUseAlphaToCoverage)
+                        glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
+                else
+                        glDisable(GL_ALPHA_TEST);
         }
         else if (!mAlphaTestEnabled && alphaTest)
@@ -104 +106 @@
                 mAlphaTestEnabled = true;
                 
-                // not needed with GL_SAMPLE_ALPHA_TO_COVERAGE_ARB
-                //glEnable(GL_ALPHA_TEST);
-                glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
+                if (mUseAlphaToCoverage)
+                        glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
+                else
+                        glEnable(GL_ALPHA_TEST);
         }
 
@@ -146 +149 @@
 
 
+void RenderState::SetUseAlphaToCoverage(bool useAlphaToCoverage)
+{
+        mUseAlphaToCoverage = useAlphaToCoverage;
 }
+
+
+}

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/RenderState.h

@@ -57 +57 @@
         */
         inline int GetCurrentVboId() const { return mCurrentVboId; }
+        /** If alpha to coverage is instead of alpha testing
+        */
+        void SetUseAlphaToCoverage(bool useAlphaToCoverage);
 
         void SetRenderType(RenderType type) { mRenderType = type; }
@@ -86 +89 @@
 
         RenderType mRenderType;
+
+        bool mUseAlphaToCoverage;
 };
 

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

@@ -23 +23 @@
 static Polyhedron *polyhedron = NULL;
 static Polyhedron *lightPoly = NULL;
-static Vector3 dummyPt;
-static Matrix4x4 dummyMat;
 
 
@@ -159 +157 @@
 
 
-void ShadowMap::DrawPoly(Polyhedron *poly, const Vector3 &color, const Vector3 &color2)
+static void DrawPoly(Polyhedron *poly, const Vector3 &color)
 {
         if (!poly) return;
@@ -167 +165 @@
                 glColor3f(color.x, color.y, color.z);
 
-                if (i == poly->NumPolygons() - 1) // hack: different color for near
-                {
-                        //glLineWidth(2);
-                        glColor3f(color2.x, color2.y, color2.z);
-                
-                }
                 glBegin(GL_LINE_LOOP);
 
@@ -184 +176 @@
 
                 glEnd();
-                
-                //if (i == poly->NumPolygons() - 1) glLineWidth(1);
         }
 }
@@ -192 +182 @@
 void ShadowMap::DrawPolys()
 {
-        DrawPoly(lightPoly, Vector3(1, 0, 1), Vector3(1, 1, 1));
-        DrawPoly(polyhedron, Vector3(0, 1, 0), Vector3(0, 1, 1));
-
-        glPointSize(10.0f);
-
-        Vector3 pt = Vector3::ZERO();
-        //Vector3 pt = dummyPt;
-
-        Matrix4x4 myMat = Invert(dummyMat);
-        pt = myMat * pt;
-
-        glBegin(GL_POINTS);
-        glVertex3f(pt.x, pt.y, pt.z);
-        glEnd();
+        DrawPoly(lightPoly, Vector3(1, 0, 1));
+        DrawPoly(polyhedron, Vector3(0, 1, 0));
 }
 
@@ -235 +213 @@
         //-- first find the free parameter values n, and P (the projection center), and the projection depth
 
-        //const float n = 1e2f;
-        //const float n = 1e6f;
         const float n = ComputeN(bounds_ls);
 
-        cout << "n: " << n << endl;
+        //cout << "n: " << n << endl;
 
         const Vector3 nearPt = GetNearCameraPointE(body);
@@ -248 +224 @@
         // the start point has the x and y coordinate of e, the z coord of the near plane of the light volume
         const Vector3 startPt = Vector3(lsNear.x, lsNear.y, bounds_ls.Max().z);
-        //const Vector3 schas = lightSpace * mCamera->GetPosition();
-        //const Vector3 startPt = Vector3(schas.x, schas.y, bounds_ls.Max().z);
-
-        cout << "mx: " <<  bounds_ls.Max() << endl;
-        cout << "mn: " << bounds_ls.Min() << endl;
-
+        
         // the new projection center
         const Vector3 projCenter = startPt + Vector3::UNIT_Z() * n;
 
-        cout <<"start: " << startPt << " " << projCenter << " " << Distance(lightSpace * mCamera->GetPosition(), startPt) << endl;
-
-        dummyPt = startPt;
-
         //construct a translation that moves to the projection center
         const Matrix4x4 projectionCenter = TranslationMatrix(-projCenter);
@@ -270 +237 @@
         const float dx = fabs(bounds_ls.Max()[0] - bounds_ls.Min()[0]);
 
-        cout << "d: " << d << " dy: " << dy << " dx: " << dx << endl;
-
         
 
@@ -281 +246 @@
         matLispSM = GetFrustum(-1.0, 1.0, -1.0, 1.0, n, n + d);
 
-        //cout << "lispsm\n" << matLispSM << endl;
-
         // translate to the projection center
         matLispSM = projectionCenter * matLispSM;
-
-        //cout << "new\n" << matLispSM << endl;
 
         // transform into OpenGL right handed system
@@ -314 +275 @@
                 Vector3 pt = *it;
                 Vector3 ptE = eyeView * pt;
-//cout<<"i"<< pt.z;
+                
                 if (ptE.z > 0) cerr <<"should not happen " << ptE.z << endl;
                 else
@@ -376 +337 @@
         Vector3 projDir(b_lp - e_lp);
 
-        Matrix4x4 dummy = Invert(lightSpace);
-        Invert(dummy);
-        Vector3 dummyVec = dummy * e_lp;
-        Vector3 dummyVec2 = dummy * b_lp;
-
-        //projDir.z = -projDir.z;
-
-        cout << "dummy: " << Normalize(dummyVec2 - dummyVec) << endl;
         //project the view direction into the shadow map plane
         projDir.y = .0f;
 
         return Normalize(projDir);
-        //return projDir;
 }
 
@@ -435 +387 @@
         const Vector3 projViewDir = GetProjViewDir(lightView * lightProj, frustumPoints);
 
-        cout << "projViewDir: " << projViewDir << " orig " << mCamera->GetDirection() << endl;
-                                                                
         //do Light Space Perspective shadow mapping
         //rotate the lightspace so that the projected light view always points upwards
@@ -444 +394 @@
         const Matrix4x4 frame = MyLookAt(Vector3::ZERO(), projViewDir, Vector3::UNIT_Y());
 
-        cout << "frame\n " << frame << endl;
         lightProj *= frame;
 
@@ -464 +413 @@
         AxisAlignedBox3 lightPts = GetExtremalPoints(lightView * lightProj, frustumPoints);
 
-        cout << "max: " << lightPts.Max() << " min: " << lightPts.Min() << endl;
         // focus projection matrix on the extremal points => scale to unit cube
         Matrix4x4 scaleTranslate = GetFittingProjectionMatrix(lightPts);
 
-        cout << "scaleTranslate:\n" << scaleTranslate << endl;
-
         lightProj = lightProj * scaleTranslate;
 
@@ -475 +421 @@
 
         AxisAlignedBox3 lightPtsNew = GetExtremalPoints(mymat, frustumPoints);
-
-        cout << "newmax: " << lightPtsNew.Max() << endl;
-        cout << "newmin: " << lightPtsNew.Min() << endl;
 
         // we have to flip the signs in order to tranform to opengl right handed system
@@ -578 +521 @@
 
         glDisable(GL_LIGHTING);
-        glDisable(GL_TEXTURE_2D);
+        //glDisable(GL_TEXTURE_2D);
         glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
 
@@ -602 +545 @@
         glPopAttrib();
         
+        glShadeModel(GL_SMOOTH);
         glEnable(GL_LIGHTING);
         glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
@@ -623 +567 @@
 {
         glEnable(GL_LIGHTING);
-        glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-
+        
         _Render(renderer);
         
+        /*glDisable(GL_LIGHTING);
+        glDisable(GL_DEPTH_TEST);
+
+        //glLineWidth(2);
+        Polyhedron *hpoly = CreatePolyhedron(projView, mSceneBox);
+        DrawPoly(hpoly, Vector3(1, 1, 1));
+
+        DEL_PTR(hpoly);
+
+        glEnable(GL_LIGHTING);
+        glEnable(GL_DEPTH_TEST);*/
+
         glDisable(GL_POLYGON_OFFSET_FILL);
-        glDisable(GL_LIGHTING);
 }
 
@@ -637 +591 @@
         //const Vector3 dir(0, 0, -1);
 
-        cout << "dir: " << dir << endl;
         mShadowCam->SetDirection(dir);
 
@@ -664 +617 @@
 
         mLightProjView = lightView * lightProj;
-        dummyMat = mLightProjView;
 
         DEL_PTR(lightPoly);
@@ -682 +634 @@
         renderer->RenderScene();
 
+
         glMatrixMode(GL_MODELVIEW);
         glPopMatrix();

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/ShadowMapping.h

@@ -87 +87 @@
         Vector3 GetProjViewDir(const Matrix4x4 &lightSpace, const VertexArray &pts) const;
 
-        static void DrawPoly(Polyhedron *poly, const Vector3 &color, const Vector3 &color2);
 
         /** Internal shador render method.

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

@@ -100 +100 @@
 static int winHeight = 768;
 
-const float shadowSize = 4096;
+//const float shadowSize = 4096;
+const float shadowSize = 2048;
 
 static float winAspectRatio = 1.0f;
@@ -922 +923 @@
 
                 // the scene is rendered withouth any shading   
+                glShadeModel(GL_FLAT);
+        
                 glDisable(GL_LIGHTING);
         
@@ -934 +937 @@
                 {
                         shadowChanged = false;
+
+                        //glEnable(GL_MULTISAMPLE_ARB);
 
                         cgGLDisableProfile(RenderState::sCgFragmentProfile);
@@ -944 +949 @@
                         BvhNode::SetCurrentState(1);
 
+                        state.SetUseAlphaToCoverage(false);
+
                         // the scene is rendered withouth any shading   
                         shadowMap->ComputeShadowMap(shadowTraverser, matProjectionView);
+
+                        state.SetUseAlphaToCoverage(true);
 
                         // change back state
@@ -1025 +1034 @@
         {
                 glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+                glShadeModel(GL_SMOOTH);
+
                 RenderVisibleObjects();
         }

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/deferred.cg

@@ -137 +137 @@
         if (amb < 0.9f) // hack: prevent shadowing the sky      
         {
-                const float x = 0.1f;
+                // base lighting
+                const float x = 0.4f;
                 OUT.color *= x + (1.0f - x) * (1.0f - d);
         }