bool PCrosshairInteraction::Draw (Painter &inPainter) {
if (mActive) {
float theX1 = mX;
float theY1 = mPPlot.mMargins.mTop;
float theX2 = mX;
float theY2 = inPainter.GetHeight () - mPPlot.mMargins.mBottom;
inPainter.SetLineColor (0, 0, 0);
inPainter.DrawLine (theX1, theY1, theX2, theY2);
PlotDataContainer &theContainer = mPPlot.mPlotDataContainer;
long thePlotCount = theContainer.GetPlotCount ();
for (long theI=0;theI<thePlotCount;theI++) {
PlotDataBase *theXData = theContainer.GetXData (theI);
PlotDataBase *theYData = theContainer.GetYData (theI);
LegendData *theLegendData = theContainer.GetLegendData (theI);
float theY;
if (GetCrossPoint (theXData, theYData, theY)) {
if (mListener) {
float theXTarget = mPPlot.mXTrafo->TransformBack (mX);
float theYTarget = mPPlot.mYTrafo->TransformBack (theY);
mListener->HandleCrosshair (theI, thePlotCount, theXTarget, theYTarget);
}
theX1 = mPPlot.mMargins.mLeft;
theX2 = inPainter.GetWidth ()-mPPlot.mMargins.mLeft;
theY1 = theY2 = theY;
PColor theC = theLegendData->mColor;
inPainter.SetLineColor (theC.mR, theC.mG, theC.mB);
inPainter.DrawLine (theX1, theY1, theX2, theY2);
}
}
}
return true;
}
// 返回0:没碰撞,1:与X碰撞,2:与Y碰撞,3:与XY都碰撞
int KMovableObject::GetCollisionResult(int nSrcX, int nSrcY, int nDestX, int nDestY)
{
BOOL XDown = false;
BOOL XUp = false;
BOOL YLeft = false;
BOOL YRight = false;
int nXDistance = -1;
int nYDistance = -1;
// 需要检测cell与轨迹的交面
POINT ObjStart = {nSrcX, nSrcY};
POINT ObjEnd = {nDestX, nDestY};
POINT CellLeftDown;
POINT CellLeftUp;
POINT CellRightDown;
POINT CellRightUp;
CellLeftDown.x = nDestX - nDestX % CELL_LENGTH;
CellLeftDown.y = nDestY - nDestY % CELL_LENGTH;
CellLeftUp.x = nDestX - nDestX % CELL_LENGTH;
CellLeftUp.y = nDestY - nDestY % CELL_LENGTH + CELL_LENGTH;
CellRightDown.x = nDestX - nDestX % CELL_LENGTH + CELL_LENGTH;
CellRightDown.y = nDestY - nDestY % CELL_LENGTH;
CellRightUp.x = nDestX - nDestX % CELL_LENGTH + CELL_LENGTH;
CellRightUp.y = nDestY - nDestY % CELL_LENGTH + CELL_LENGTH;
// XDown
if (IsLineSegmentCross(ObjStart, ObjEnd, CellLeftDown, CellRightDown))
{
POINT XDownIntersection;
XDown = true;
XDownIntersection = GetCrossPoint(ObjStart, ObjEnd, CellLeftDown, CellRightDown);
nXDistance = g_GetDistance2((int)nSrcX, (int)nSrcY, (int)XDownIntersection.x, (int)XDownIntersection.y);
}
// XUp
if (IsLineSegmentCross(ObjStart, ObjEnd, CellLeftUp, CellRightUp))
{
POINT XUpIntersection;
XUp = true;
XUpIntersection = GetCrossPoint(ObjStart, ObjEnd, CellLeftUp, CellRightUp);
int nXUpDistance = g_GetDistance2((int)nSrcX, (int)nSrcY, (int)XUpIntersection.x, (int)XUpIntersection.y);
if (XDown)
nXDistance = MIN(nXUpDistance, nXDistance);
else
nXDistance = nXUpDistance;
}
// YLeft
if (IsLineSegmentCross(ObjStart, ObjEnd, CellLeftDown, CellLeftUp))
{
POINT YLeftIntersection;
YLeft = true;
YLeftIntersection = GetCrossPoint(ObjStart, ObjEnd, CellLeftDown, CellLeftUp);
nYDistance = g_GetDistance2((int)nSrcX, (int)nSrcY, (int)YLeftIntersection.x, (int)YLeftIntersection.y);
}
// YRight
if (IsLineSegmentCross(ObjStart, ObjEnd, CellRightDown, CellRightUp))
{
POINT YRightIntersection;
YRight = true;
YRightIntersection = GetCrossPoint(ObjStart, ObjEnd, CellRightDown, CellRightUp);
int nYRightDistance = g_GetDistance2((int)nSrcX, (int)nSrcY, (int)YRightIntersection.x, (int)YRightIntersection.y);
if (YLeft)
nYDistance = MIN(nYRightDistance, nYDistance);
else
nYDistance = nYRightDistance;
}
if (nXDistance >= 0 && nYDistance >= 0)
{
if (nXDistance < nYDistance)
return 1;
else if (nXDistance > nYDistance)
return 2;
else
return 3;
}
else if (nXDistance >= 0)
return 1;
else if (nYDistance >= 0)
return 2;
else
return 0;
}
