Changeset 2934

Timestamp:

09/12/08 13:20:42 (16 years ago)

Author:

mattausch

Message:

 

Location:

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

Files:

• Matrix4x4.cpp (modified) (2 diffs)
• Matrix4x4.h (modified) (1 diff)
• RenderState.cpp (modified) (1 diff)
• ShadowMapping.cpp (modified) (12 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Matrix4x4.cpp

@@ -742 +742 @@
         Matrix4x4 m(nRight, nUp, -nDir);
 
-        /*m.x[3][0] = -DotProd(nRight, position);
-        m.x[3][1] = -DotProd(nUp, position);
-        m.x[3][2] = -DotProd(nDir, position);*/
-
         Vector3 position = m * -pos;
         
@@ -756 +752 @@
 }
 
-}
+
+Matrix4x4 MyLookAt2(const Vector3 &pos, const Vector3 &dir, const Vector3& up) 
+{
+        const Vector3 nDir = Normalize(dir);
+        Vector3 nUp = Normalize(up);
+
+        Vector3 nRight = Normalize(CrossProd(nDir, nUp));
+        nUp = Normalize(CrossProd(nRight, nDir));
+
+        Matrix4x4 m(nRight, nUp, nDir);
+
+        /*m.x[3][0] = -DotProd(nRight, position);
+        m.x[3][1] = -DotProd(nUp, position);
+        m.x[3][2] = -DotProd(nDir, position);*/
+
+        Vector3 position = m * -pos;
+        
+        // note: left handed system => we go into positive z
+        m.x[3][0] = position.x;
+        m.x[3][1] = position.y;
+        m.x[3][2] = position.z;
+
+        return m;
+}
+}

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Matrix4x4.h

@@ -161 +161 @@
 Matrix4x4 LookAt(const Vector3 &pos, const Vector3 &dir, const Vector3& up);
 Matrix4x4 MyLookAt(const Vector3 &pos, const Vector3 &dir, const Vector3& up);
+Matrix4x4 MyLookAt2(const Vector3 &pos, const Vector3 &dir, const Vector3& up);
 
 

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

@@ -89 +89 @@
         {
                 mCullFaceEnabled = true;
-                //glEnable(GL_CULL_FACE);
+                glEnable(GL_CULL_FACE);
         }
 

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

@@ -23 +23 @@
 static Polyhedron *polyhedron = NULL;
 static Polyhedron *lightPoly = NULL;
-static Matrix4x4 dummy = IdentityMatrix();
+static Vector3 dummyPt;
 
 
@@ -185 +185 @@
         DrawPoly(polyhedron, Vector3(0, 1, 0));
 
-        Vector3 pt = Vector3::ZERO();
-
-        pt = dummy * pt;
-
         glPointSize(10.0f);
 
         glBegin(GL_POINTS);
-        glVertex3f(pt.x, pt.y, pt.z);
+        glVertex3f(dummyPt.x, dummyPt.y, dummyPt.z);
         glEnd();
 }
@@ -223 +219 @@
         //-- first find the free parameter values n, and P (the projection center), and the projection depth
 
-        const float n = 1e3f;
-        //const float n = 1e6f;
+        //const float n = 1e1f;
+        const float n = 1e6f;
         //const float n = ComputeN(bounds_ls) * 100;
 
@@ -244 +240 @@
 
         cout <<"start: " << startPt << " " << projCenter << " " << Distance(lightSpace * mCamera->GetPosition(), startPt) << endl;
+dummyPt = -projCenter;
 
         //construct a translation that moves to the projection center
@@ -408 +405 @@
 
         transform2LispSM.x[0][0] =  1.0f;
-        transform2LispSM.x[1][2] = -1.0f; // y => -z
+        transform2LispSM.x[1][2] =  -1.0f; // y => -z
         transform2LispSM.x[2][1] =  1.0f; // z => y
         transform2LispSM.x[3][3] =  1.0f;
@@ -424 +421 @@
         //calculate a frame matrix that uses the projViewDir[lightspace] as up vector
         //look(from position, into the direction of the projected direction, with unchanged up-vector)
-        const Matrix4x4 frame = MyLookAt(Vector3::ZERO(), projViewDir, Vector3::UNIT_Y());
+        const Matrix4x4 frame = MyLookAt2(Vector3::ZERO(), -projViewDir, Vector3::UNIT_Y());
         //const Matrix4x4 frame = MyLookAt(Vector3::ZERO(), projViewDir, Vector3::UNIT_Z());
 
@@ -442 +439 @@
         transformToGL.x[0][0] =  1.0f;
         transformToGL.x[1][2] =  1.0f; // z => y
-        transformToGL.x[2][1] = -1.0f; // y => -z
+        transformToGL.x[2][1] =  -1.0f; // y => -z
         transformToGL.x[3][3] =  1.0f;
 
@@ -564 +561 @@
 
         Vector3 upVec = CalcUpVec(mCamera->GetDirection(), dir);
-        Matrix4x4 lightView = MyLookAt(mShadowCam->GetPosition(), -dir, -upVec);
-        //Matrix4x4 lightView = MyLookAt(mShadowCam->GetPosition(), dir, mCamera->GetDirection());
+        Matrix4x4 lightView = MyLookAt2(mShadowCam->GetPosition(), -dir, upVec);
 
         mShadowCam->mViewOrientation = lightView;
@@ -603 +599 @@
 
         mLightProjView = lightView * lightProj;
-glEnable(GL_CULL_FACE);
+;
         cout << "here3" << endl;
         DEL_PTR(lightPoly);
@@ -676 +672 @@
 
         Vector3 upVec = CalcUpVec(mCamera->GetDirection(), dir);
-        Matrix4x4 lightView = MyLookAt(mShadowCam->GetPosition(), -dir, -upVec);
-        //Matrix4x4 lightView = Invert(_lightView);
-        //Matrix4x4 lightView = MyLookAt(mShadowCam->GetPosition(), dir, mCamera->GetDirection());
+        Matrix4x4 lightView = MyLookAt2(mShadowCam->GetPosition(), -dir, upVec);
 
         mShadowCam->mViewOrientation = lightView;
@@ -702 +696 @@
         mLightProjView = lightView * lightProj;
 
-        dummy = mLightProjView;
+        //dummy = mLightProjView;
 
         DEL_PTR(lightPoly);
@@ -711 +705 @@
         glLoadIdentity();
 
-        glDisable(GL_CULL_FACE);
+        //glDisable(GL_CULL_FACE);
 
         mShadowCam->SetupCameraView();