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Fix: Apply consistent Z-up to Y-up transformations for camera

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Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>
This commit is contained in:
Tanner Collin
2026-02-18 17:11:21 -07:00
parent 380c333002
commit c0cb427cf1
1 changed files with 19 additions and 6 deletions
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25
src/Camera.cpp
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@@ -67,6 +67,7 @@ void Camera::wheelEvent(QWheelEvent* event, const QVector3D& worldPos)
QMatrix4x4 rotation;
rotation.rotate(m_xRot / 16.0f, 1, 0, 0);
rotation.rotate(m_yRot / 16.0f, 0, 1, 0);
rotation.rotate(-90.0f, 1, 0, 0);
QVector3D p_camera = rotation.map(worldPos);
if (std::abs(p_camera.z() + oldZoom) < 1e-6) {
@@ -90,13 +91,17 @@ QMatrix4x4 Camera::modelViewMatrix() const
QMatrix4x4 model;
model.translate(m_panX, m_panY, m_zoom);
QMatrix4x4 zup_rotation;
zup_rotation.rotate(-90.0f, 1, 0, 0);
QVector3D pivot_yup = zup_rotation.map(m_rotationPivot);
if (m_isRotating) {
model.translate(m_rotationPivot);
model.translate(pivot_yup);
}
model.rotate(m_xRot / 16.0f, 1, 0, 0);
model.rotate(m_yRot / 16.0f, 0, 1, 0);
if (m_isRotating) {
model.translate(-m_rotationPivot);
model.translate(-pivot_yup);
}
model.rotate(-90.0f, 1, 0, 0); // For Z-up system
@@ -343,12 +348,16 @@ void Camera::startRotation(const QVector3D& pivot)
}
m_stableZoom = m_zoom;
QMatrix4x4 zup_rotation;
zup_rotation.rotate(-90.0f, 1, 0, 0);
QVector3D pivot_yup = zup_rotation.map(m_rotationPivot);
QMatrix4x4 rotation;
rotation.rotate(m_xRot / 16.0f, 1, 0, 0);
rotation.rotate(m_yRot / 16.0f, 0, 1, 0);
QVector3D p_rotated = rotation.map(m_rotationPivot);
QVector3D p_diff = p_rotated - m_rotationPivot;
QVector3D p_rotated = rotation.map(pivot_yup);
QVector3D p_diff = p_rotated - pivot_yup;
setPanX(m_panX + p_diff.x());
setPanY(m_panY + p_diff.y());
@@ -363,12 +372,16 @@ void Camera::stopRotation()
return;
}
QMatrix4x4 zup_rotation;
zup_rotation.rotate(-90.0f, 1, 0, 0);
QVector3D pivot_yup = zup_rotation.map(m_rotationPivot);
QMatrix4x4 rotation;
rotation.rotate(m_xRot / 16.0f, 1, 0, 0);
rotation.rotate(m_yRot / 16.0f, 0, 1, 0);
QVector3D p_rotated = rotation.map(m_rotationPivot);
QVector3D p_diff = p_rotated - m_rotationPivot;
QVector3D p_rotated = rotation.map(pivot_yup);
QVector3D p_diff = p_rotated - pivot_yup;
setPanX(m_panX - p_diff.x());
setPanY(m_panY - p_diff.y());