public static (float2?exactInput, Rect2D?inputPlane, int track) PerformInputRaycast(Ray cameraRay)
{
float3 origin = cameraRay.origin;
float3 dir = math.normalize(cameraRay.direction);
//-GET AABB2D FOR INPUT PLANE-//
Rect2D?inputPlane;
float2?exactInput;
//Edge case: tap will never collide with plane
//Multiplication allows for simultaneous checks for no z difference between camera and origin, and invalid z signs
if (origin.z * dir.z >= 0)
{
inputPlane = null;
exactInput = null;
}
else
{
//Cast ray onto xy plane at z=0
float zratio = -origin.z / dir.z;
float projPosX = origin.x + (dir.x * zratio);
float projPosY = origin.y + (dir.y * zratio);
exactInput = new float2(projPosX, projPosY);
//FIND X LENIENCY USING 0TH'S MAGIC
float deltaY = origin.y - projPosY;
float deltaX = origin.x - projPosX;
float distToXAxis = math.sqrt((deltaY * deltaY) + (origin.z * origin.z));
float distToYAxis = math.sqrt((deltaX * deltaX) + (origin.z * origin.z));
float nDeltaX = -deltaX;
float nDeltaY = -deltaY;
float xMax = distToXAxis * (nDeltaX + (TAN_EPSILON * distToXAxis)) / (
distToXAxis - (nDeltaX * TAN_EPSILON))
+ origin.x;
float xMin = distToXAxis * (nDeltaX - (TAN_EPSILON * distToXAxis)) / (
distToXAxis + (nDeltaX * TAN_EPSILON))
+ origin.x;
//FIND Y LENIENCY USING 0TH'S MAGIC
float yMax = distToYAxis * (nDeltaY + (TAN_EPSILON * distToYAxis)) / (
distToYAxis - (nDeltaY * TAN_EPSILON))
+ origin.y;
float yMin = distToYAxis * (nDeltaY - (TAN_EPSILON * distToYAxis)) / (
distToYAxis + nDeltaY * TAN_EPSILON)
+ origin.y;
//Input plane
inputPlane = new Rect2D(xMin, yMin, xMax, yMax);
}
//-GET TRACK RANGE-//
int track = -1;
//Check if the tap is too high on the input plane for a track tap
if (
(!inputPlane.HasValue || inputPlane.Value.min.y < Y_MAX_FOR_TRACK) &&
origin.y * cameraRay.direction.y <= 0
)
{
//Cast ray onto xz plane at y=0
float yratio = -origin.y / dir.y;
float lProjPosX = origin.x + (dir.x * yratio);
float lProjPosZ = origin.z + (dir.z * yratio);
//Check if cast falls out of acceptable range
if (-Constants.RenderFloorPositionRange <= lProjPosZ && lProjPosZ <= Constants.RenderFloorPositionRange)
{
track = Conversion.XToTrack(lProjPosX);
}
track = track > 4 ? 4 : track;
track = track < 1 ? 1 : track;
}
//RETURN
return(exactInput, inputPlane, track);
}
public bool CollidesWith(Rect2D other) => min.x <= other.max.x && max.x >= other.min.x && min.y <= other.max.y && max.y >= other.min.y;
public bool CollidesWith(Rect2D other) => other.CollidesWith(this);