diff options
Diffstat (limited to 'source/gameengine/Ketsji/KX_Camera.cpp')
| -rw-r--r-- | source/gameengine/Ketsji/KX_Camera.cpp | 77 |
1 files changed, 5 insertions, 72 deletions
diff --git a/source/gameengine/Ketsji/KX_Camera.cpp b/source/gameengine/Ketsji/KX_Camera.cpp index fb91c793765..3830d422138 100644 --- a/source/gameengine/Ketsji/KX_Camera.cpp +++ b/source/gameengine/Ketsji/KX_Camera.cpp @@ -259,75 +259,10 @@ void KX_Camera::ExtractFrustumSphere() if (m_set_frustum_center) return; - // compute sphere for the general case and not only symmetric frustum: - // the mirror code in ImageRender can use very asymmetric frustum. - // We will put the sphere center on the line that goes from origin to the center of the far clipping plane - // This is the optimal position if the frustum is symmetric or very asymmetric and probably close - // to optimal for the general case. The sphere center position is computed so that the distance to - // the near and far extreme frustum points are equal. - - // get the transformation matrix from device coordinate to camera coordinate - MT_Matrix4x4 clip_camcs_matrix = m_projection_matrix; - clip_camcs_matrix.invert(); - - // detect which of the corner of the far clipping plane is the farthest to the origin - MT_Vector4 nfar; // far point in device normalized coordinate - MT_Point3 farpoint; // most extreme far point in camera coordinate - MT_Point3 nearpoint;// most extreme near point in camera coordinate - MT_Point3 farcenter(0.,0.,0.);// center of far cliping plane in camera coordinate - MT_Scalar F=1.0, N; // square distance of far and near point to origin - MT_Scalar f, n; // distance of far and near point to z axis. f is always > 0 but n can be < 0 - MT_Scalar e, s; // far and near clipping distance (<0) - MT_Scalar c; // slope of center line = distance of far clipping center to z axis / far clipping distance - MT_Scalar z; // projection of sphere center on z axis (<0) - // tmp value - MT_Vector4 npoint(1., 1., 1., 1.); - MT_Vector4 hpoint; - MT_Point3 point; - MT_Scalar len; - for (int i=0; i<4; i++) - { - hpoint = clip_camcs_matrix*npoint; - point.setValue(hpoint[0]/hpoint[3], hpoint[1]/hpoint[3], hpoint[2]/hpoint[3]); - len = point.dot(point); - if (len > F) - { - nfar = npoint; - farpoint = point; - F = len; - } - // rotate by 90 degree along the z axis to walk through the 4 extreme points of the far clipping plane - len = npoint[0]; - npoint[0] = -npoint[1]; - npoint[1] = len; - farcenter += point; - } - // the far center is the average of the far clipping points - farcenter *= 0.25; - // the extreme near point is the opposite point on the near clipping plane - nfar.setValue(-nfar[0], -nfar[1], -1., 1.); - nfar = clip_camcs_matrix*nfar; - nearpoint.setValue(nfar[0]/nfar[3], nfar[1]/nfar[3], nfar[2]/nfar[3]); - N = nearpoint.dot(nearpoint); - e = farpoint[2]; - s = nearpoint[2]; - // projection on XY plane for distance to axis computation - MT_Point2 farxy(farpoint[0], farpoint[1]); - // f is forced positive by construction - f = farxy.length(); - // get corresponding point on the near plane - farxy *= s/e; - // this formula preserve the sign of n - n = f*s/e - MT_Point2(nearpoint[0]-farxy[0], nearpoint[1]-farxy[1]).length(); - c = MT_Point2(farcenter[0], farcenter[1]).length()/e; - // the big formula, it simplifies to (F-N)/(2(e-s)) for the symmetric case - z = (F-N)/(2.0*(e-s+c*(f-n))); - m_frustum_center = MT_Point3(farcenter[0]*z/e, farcenter[1]*z/e, z); - m_frustum_radius = m_frustum_center.distance(farpoint); - -#if 0 // The most extreme points on the near and far plane. (normalized device coords) MT_Vector4 hnear(1., 1., 0., 1.), hfar(1., 1., 1., 1.); + MT_Matrix4x4 clip_camcs_matrix = m_projection_matrix; + clip_camcs_matrix.invert(); // Transform to hom camera local space hnear = clip_camcs_matrix*hnear; @@ -338,12 +273,10 @@ void KX_Camera::ExtractFrustumSphere() MT_Point3 farpoint(hfar[0]/hfar[3], hfar[1]/hfar[3], hfar[2]/hfar[3]); // Compute center - // don't use camera data in case the user specifies the matrix directly m_frustum_center = MT_Point3(0., 0., - (nearpoint.dot(nearpoint) - farpoint.dot(farpoint))/(2.0*(nearpoint[2]-farpoint[2] /*m_camdata.m_clipend - m_camdata.m_clipstart*/))); + (nearpoint.dot(nearpoint) - farpoint.dot(farpoint))/(2.0*(m_camdata.m_clipend - m_camdata.m_clipstart))); m_frustum_radius = m_frustum_center.distance(farpoint); -#endif - + // Transform to world space. m_frustum_center = GetCameraToWorld()(m_frustum_center); m_frustum_radius /= fabs(NodeGetWorldScaling()[NodeGetWorldScaling().closestAxis()]); @@ -860,7 +793,7 @@ KX_PYMETHODDEF_DOC(KX_Camera, setOnTop, { class KX_Scene* scene; - scene = KX_GetActiveScene(); + scene = PHY_GetActiveScene(); MT_assert(scene); scene->SetCameraOnTop(this); Py_Return; |