private void CreatePortalHotspots(RoomData room)
{
foreach (RoomPortal portalEntry in room.RoomPortals)
{
AABB2d boundingBox = new AABB2d();
Point2d screenP0 = ClientGameConstants.ConvertRoomPositionToScreenPosition(portalEntry.boundingBox.Min);
Point2d screenP1 = ClientGameConstants.ConvertRoomPositionToScreenPosition(portalEntry.boundingBox.Max);
boundingBox.EnclosePoint(screenP0);
boundingBox.EnclosePoint(screenP1);
m_hotspotWidgets.Add(
new HotspotWidget(m_rootWidgetGroup,
"Portal" + portalEntry.portal_id.ToString(),
boundingBox.Extents.i,
boundingBox.Extents.j,
boundingBox.Min.x,
boundingBox.Min.y,
new HotspotInfo {
hotspotType = eHotspotType.portal, hotspotEntity = portalEntry
}));
}
}
private void CreateEnergyTankHotspots(RoomData room)
{
foreach (EnergyTankData energyTankData in room.EnergyTankMap.Values)
{
AABB2d boundingBox = new AABB2d();
Point2d screenP0 = ClientGameConstants.ConvertRoomPositionToScreenPosition(energyTankData.boundingBox.Min);
Point2d screenP1 = ClientGameConstants.ConvertRoomPositionToScreenPosition(energyTankData.boundingBox.Max);
boundingBox.EnclosePoint(screenP0);
boundingBox.EnclosePoint(screenP1);
m_hotspotWidgets.Add(
new HotspotWidget(m_rootWidgetGroup,
"EnergyTank" + energyTankData.energy_tank_id.ToString(),
boundingBox.Extents.i,
boundingBox.Extents.j,
boundingBox.Min.x,
boundingBox.Min.y,
new HotspotInfo {
hotspotType = eHotspotType.energy_tank, hotspotEntity = energyTankData
}));
}
}
public bool Raycast(
Point3d start,
NavRef startNavRef,
Point3d end,
NavRef endNavRef,
out float t)
{
bool hit = false;
if (!startNavRef.IsValid || !endNavRef.IsValid)
{
hit = true;
t = 0.0f;
}
else if (startNavRef.Equals(endNavRef))
{
hit = false;
t = 1.0f;
}
else
{
uint maxRaycastIteration = m_rowCount + m_colomnCount;
uint iterationCount = 0;
NavRef currentNavRef = startNavRef;
AABB2d currentNavCellBounds = ComputeNavCellBounds2d((uint)currentNavRef.NavCellIndex);
Point2d start2d = start.ToPoint2d();
Vector2d rayDirection = (end - start).ToVector2d();
float tEpsilon = MathConstants.POSITIONAL_EPSILON / rayDirection.Magnitude();
t = 0.0f;
while (t < 1.0f && !hit)
{
float clipMinT = 0.0f;
float clipMaxT = 0.0f;
// Compute where the ray exists the bounding box of the cell
if (!currentNavCellBounds.ClipRay(
start2d,
rayDirection,
out clipMinT,
out clipMaxT))
{
// If we failed to clip against the bounds that we were suppose to be inside of,
// just use the current t and rely on the positional epsilon advancement to get
// us back on track
Debug.Assert(false, "Raycast didn't clip against box it was suppose to intersect");
clipMinT = t;
clipMaxT = t;
}
if (clipMaxT < 1.0f)
{
// If we haven't gotten to the end of the ray yet, try to advance to the next nav cell
Point2d newTestPoint = start2d + rayDirection * (clipMaxT + tEpsilon);
// Find the adjacent neighboring cell, if any
currentNavRef = ComputeNavRefAtPoint(newTestPoint);
if (currentNavRef.IsValid)
{
currentNavCellBounds = ComputeNavCellBounds2d((uint)currentNavRef.NavCellIndex);
if (currentNavRef.Equals(endNavRef))
{
t = 1.0f;
hit = false;
}
else
{
t = Math.Min(clipMaxT + tEpsilon, 1.0f);
hit = false;
}
}
else
{
t = clipMaxT;
hit = true;
}
}
else
{
// Made it all the way to the end without hitting anything
t = 1.0f;
hit = false;
}
// Safety iteration max to prevent infinite loops
iterationCount++;
if (iterationCount > maxRaycastIteration)
{
// Something funky happened. Just assume we can see to the end
Debug.Assert(false, "Raycast hit iteration limit");
t = 1.0f;
hit = false;
break;
}
}
}
return(hit);
}
