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| author | Stefan Suhren <suhren.stefan@fh-swf.de> | 2015-12-14 17:39:25 +0100 |
|---|---|---|
| committer | Stefan Suhren <suhren.stefan@fh-swf.de> | 2015-12-14 17:39:25 +0100 |
| commit | 5b10b57badf1b28f3cebed1f045764ba212466e7 (patch) | |
| tree | c035b87657fc4aafc173b544c3e833351b69a88c | |
| parent | ca49968016ef47289c4350ce676e444ac33b8180 (diff) | |
| download | Multimedia-5b10b57badf1b28f3cebed1f045764ba212466e7.tar.gz Multimedia-5b10b57badf1b28f3cebed1f045764ba212466e7.zip | |
Fix top hit detection
| -rw-r--r-- | src/gldisc.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/gldisc.cpp b/src/gldisc.cpp index 5afa4d4..ee0a06b 100644 --- a/src/gldisc.cpp +++ b/src/gldisc.cpp @@ -89,6 +89,7 @@ bool GLDisc::isHit(QVector3D p1, QVector3D p2) QVector3D lineVector = p2 - p1; + // Calculate intersection point with the xy plane QVector3D vecBottom = p1 + lineVector * (-p1.z() / lineVector.z()); if (vecBottom.length() < m_circleRadius) @@ -96,7 +97,10 @@ bool GLDisc::isHit(QVector3D p1, QVector3D p2) return true; } - QVector3D vecTop = p1 + lineVector * ((m_height - p1.z()) / lineVector.z()); + // Calculate intersection point with the xy + m_heigth plane + // Then drop z so that we get a projection onto the xy plane + QVector3D vecTop = (p1 + lineVector * ((m_height - p1.z()) / + lineVector.z())).toVector2D(); if (vecTop.length() < m_circleRadius) { |