diff options
| -rw-r--r-- | source/gameengine/VideoTexture/ImageRender.cpp | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/source/gameengine/VideoTexture/ImageRender.cpp b/source/gameengine/VideoTexture/ImageRender.cpp index 1bf970babf0..58697ed3cc7 100644 --- a/source/gameengine/VideoTexture/ImageRender.cpp +++ b/source/gameengine/VideoTexture/ImageRender.cpp @@ -539,8 +539,9 @@ ImageRender::ImageRender (KX_Scene * scene, KX_GameObject * observer, KX_GameObj float mirrorArea = 0.f; float mirrorNormal[3] = {0.f, 0.f, 0.f}; float mirrorUp[3]; - float dist, vec[3]; + float dist, vec[3], axis[3]; float zaxis[3] = {0.f, 0.f, 1.f}; + float yaxis[3] = {0.f, 1.f, 0.f}; float mirrorMat[3][3]; float left, right, top, bottom, back; @@ -602,23 +603,36 @@ ImageRender::ImageRender (KX_Scene * scene, KX_GameObject * observer, KX_GameObj THRWEXCP(MirrorNormalInvalid, S_OK); } // the mirror plane has an equation of the type ax+by+cz = d where (a,b,c) is the normal vector - // mirror up direction is the projection of Z on the plane - // scalar product between normal and Z axis - dist = Inpf(mirrorNormal, zaxis); - if (dist < FLT_EPSILON) + // if the mirror is more vertical then horizontal, the Z axis is the up direction. + // otherwise the Y axis is the up direction. + // If the mirror is not perfectly vertical(horizontal), the Z(Y) axis projection on the mirror + // plan by the normal will be the up direction. + if (fabs(mirrorNormal[2]) > fabs(mirrorNormal[1]) && + fabs(mirrorNormal[2]) > fabs(mirrorNormal[0])) + { + // the mirror is more horizontal than vertical + VecCopyf(axis, yaxis); + } + else + { + // the mirror is more vertical than horizontal + VecCopyf(axis, zaxis); + } + dist = Inpf(mirrorNormal, axis); + if (fabs(dist) < FLT_EPSILON) { - // the mirror is already vertical - VecCopyf(mirrorUp, zaxis); + // the mirror is already fully aligned with up axis + VecCopyf(mirrorUp, axis); } else { - // projection of Z to normal + // projection of axis to mirror plane through normal VecCopyf(vec, mirrorNormal); VecMulf(vec, dist); - VecSubf(mirrorUp, zaxis, mirrorNormal); + VecSubf(mirrorUp, axis, vec); if (Normalize(mirrorUp) == 0.f) { - // mirror is horizontal + // should not happen THRWEXCP(MirrorHorizontal, S_OK); return; } |