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Fixed mirror demo

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Set "mirror" camera to always have the same roll as the mirror
-> otherwise the model in the mirror will move unexpectedly
Set y coordinate of the mirror corners to the cameras distance
-> This fixes a crash and keep the mirrored model at correct sizer

Closes: #194
This commit is contained in:
fireclawthefox 2017-11-11 19:12:37 +01:00 committed by rdb
parent 649a9abf8d
commit feb36d9818
1 changed files with 16 additions and 0 deletions
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16
direct/src/showbase/MirrorDemo.py
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@ -85,6 +85,10 @@ def setupMirror(name, width, height, rootCamera = None):
# Set the camera to the mirror-image position of the main camera. # Set the camera to the mirror-image position of the main camera.
cameraNP.setMat(rootCamera.getMat(planeNP) * plane.getReflectionMat()) cameraNP.setMat(rootCamera.getMat(planeNP) * plane.getReflectionMat())
# Set the cameras roll to the roll of the mirror. Otherwise
# mirrored objects will be moved unexpectedly
cameraNP.setR(planeNP.getR()-180)
# And reset the frustum to exactly frame the mirror's corners. # And reset the frustum to exactly frame the mirror's corners.
# This is a minor detail, but it helps to provide a realistic # This is a minor detail, but it helps to provide a realistic
# reflection and keep the subject centered. # reflection and keep the subject centered.
@ -92,6 +96,18 @@ def setupMirror(name, width, height, rootCamera = None):
ur = cameraNP.getRelativePoint(card, Point3(width / 2.0, 0, height / 2.0)) ur = cameraNP.getRelativePoint(card, Point3(width / 2.0, 0, height / 2.0))
ll = cameraNP.getRelativePoint(card, Point3(-width / 2.0, 0, -height / 2.0)) ll = cameraNP.getRelativePoint(card, Point3(-width / 2.0, 0, -height / 2.0))
lr = cameraNP.getRelativePoint(card, Point3(width / 2.0, 0, -height / 2.0)) lr = cameraNP.getRelativePoint(card, Point3(width / 2.0, 0, -height / 2.0))
# get the distance from the mirrors camera to the mirror plane
camvec = planeNP.getPos() - cameraNP.getPos()
camdist = camvec.length()
# set the discance on the mirrors corners so it will keep correct
# sizes of the mirrored objects
ul.setY(camdist)
ur.setY(camdist)
ll.setY(camdist)
lr.setY(camdist)
lens.setFrustumFromCorners(ul, ur, ll, lr, Lens.FCCameraPlane | Lens.FCOffAxis | Lens.FCAspectRatio) lens.setFrustumFromCorners(ul, ur, ll, lr, Lens.FCCameraPlane | Lens.FCOffAxis | Lens.FCAspectRatio)
return Task.cont return Task.cont