protected override bool defineCmd()
{
JSIApp app = (JSIApp)this.mApp;
JSIPerspCameraPerson cp = app.getPerspCameraPerson();
// create a plane on the pivot, directly facing the camera.
Plane pivotPlane = new Plane(-cp.getView(), cp.getPivot());
// project the previous screen point to the plane.
Ray prevPtRay = cp.getCamera().ScreenPointToRay(this.mPrevPt);
float prevPtDist = float.NaN;
pivotPlane.Raycast(prevPtRay, out prevPtDist);
Vector3 prevPtOnPlane = prevPtRay.GetPoint(prevPtDist);
// project the current screen point to the plane.
Ray curPtRay = cp.getCamera().ScreenPointToRay(this.mCurPt);
float curPtDist = float.NaN;
pivotPlane.Raycast(curPtRay, out curPtDist);
Vector3 curPtOnPlane = curPtRay.GetPoint(curPtDist);
// calculate the position difference between the two points.
Vector3 offset = curPtOnPlane - prevPtOnPlane;
// update the postion of the camera.
cp.setEye(cp.getEye() - offset);
return(true);
}
protected override bool defineCmd()
{
JSIApp app = (JSIApp)this.mApp;
JSIPerspCameraPerson cp = app.getPerspCameraPerson();
// calculate the normal vector of the card plane.
Vector3 normalDir =
Vector3.ProjectOnPlane(-cp.getView(), Vector3.up).normalized;
// define card dimensions.
float cardWidth = 1.0f;
float cardHeight = 2.0f;
Vector3 cardCenter = new Vector3(0.0f, cardHeight / 2.0f, 0.0f);
Vector3 cardZDir = -normalDir;
Vector3 cardYDir = Vector3.up;
Vector3 cardXDir = Vector3.Cross(cardYDir, cardZDir);
Quaternion rot = Quaternion.LookRotation(cardZDir, cardYDir);
// create a new stadning card
JSIStandingCard sc = new JSIStandingCard("EmptyStandingCard",
cardWidth, cardHeight, cardCenter, rot, null);
// add the standing card to its mgr
app.getStandingCardMgr().getStandingCards().Add(sc);
return(true);
}
protected override bool defineCmd()
{
JSIApp app = (JSIApp)this.mApp;
JSIPerspCameraPerson cp = app.getPerspCameraPerson();
float dx = this.mCurPt.x - this.mPrevPt.x;
float dy = this.mCurPt.y - this.mPrevPt.y;
float dAzimuth = 180.0f * dx / Screen.width;
float dZenith = -180.0f * dy / Screen.height;
// Quaternion qa = Quaternion.AngleAxis(dAzimuth, Vector3.up);
Quaternion qa = Quaternion.AngleAxis(dAzimuth, cp.getUp());
Quaternion qz = Quaternion.AngleAxis(dZenith, cp.getRight());
Vector3 pivotToEye = cp.getEye() - cp.getPivot();
Vector3 nextEye = cp.getPivot() + qa * qz * pivotToEye;
Vector3 nextView = qa * qz * cp.getView();
cp.setEye(nextEye);
cp.setView(nextView);
return(true);
}
protected override bool defineCmd()
{
JSIApp app = (JSIApp)this.mApp;
JSIPerspCameraPerson cp = app.getPerspCameraPerson();
// check if there exist 2D point curves.
if (app.getPtCurve2DMgr().getPtCurve2Ds().Count == 0)
{
return(false);
}
//find the lowest 2D point.
Vector2 lowestPt2D = this.calcLowestPt2D(
app.getPtCurve2DMgr().getPtCurve2Ds());
// calculate the lowest 3D point.
Ray lowestPtRay = cp.getCamera().ScreenPointToRay(lowestPt2D);
Plane groundPlane = new Plane(Vector3.up, Vector3.zero);
float lowestPtDist = float.NaN;
groundPlane.Raycast(lowestPtRay, out lowestPtDist);
Vector3 lowestPt3D = lowestPtRay.GetPoint(lowestPtDist);
// calculate the noraml vector of the card plane.
Vector3 normalDir = Vector3.ProjectOnPlane(
-cp.getView(), Vector3.up).normalized;
// calculate 3D point curves by projecting 2D point curves
// to the plane.
Plane cardPlane = new Plane(normalDir, lowestPt3D);
List <JSIAppPolyline3D> ptCurve3Ds =
this.calcProjectedPtCurve3Ds(
app.getPtCurve2DMgr().getPtCurve2Ds(), cardPlane,
cp.getCamera());
// clear 2D point curves.
foreach (JSIAppPolyline2D ptCurve2D in
app.getPtCurve2DMgr().getPtCurve2Ds())
{
ptCurve2D.destroyGameObject();
}
app.getPtCurve2DMgr().getPtCurve2Ds().Clear();
// calculate
Vector3 cardZDir = -normalDir;
Vector3 cardYDir = Vector3.up;
Vector3 cardXDir = Vector3.Cross(cardYDir, cardZDir).normalized;
Vector3 cardCtr = this.calcCardCtr(ptCurve3Ds, lowestPt3D,
cardXDir, cardYDir, cardZDir);
// calculate the local 3D
List <JSIAppPolyline3D> localPtCurve3Ds =
this.createLocalPtCurve3Ds(ptCurve3Ds, cardCtr, cardXDir,
cardYDir, cardZDir);
// clear 3D point curves.
foreach (JSIAppPolyline3D ptCurve3D in ptCurve3Ds)
{
ptCurve3D.destroyGameObject();
}
ptCurve3Ds.Clear();
// create a new standing card.
float cardWidth = this.calcCardWidth(localPtCurve3Ds);
float cardHeight = this.calcCardHeight(localPtCurve3Ds);
Quaternion q = Quaternion.LookRotation(cardZDir, cardYDir);
JSIStandingCard sc = new JSIStandingCard("StandingCard", cardWidth,
cardHeight, cardCtr, q, localPtCurve3Ds);
// add the standing car to its manager.
app.getStandingCardMgr().getStandingCards().Add(sc);
return(true);
}