X-ray and Rectangle detection collision in 2d game

Cc.exports.LineCollideRect (Startline,endline,rect)--detection of collisions between vectors and rectangles

--Get the four vertex positions of a rectangle

Local p = {CC.P (RECT.X,RECT.Y), CC.P (Rect.x + rect.width,rect.y), CC.P (Rect.x+rect.width,rect.y + rect.height), CC.P ( Rect.x,rect.y+rect.height)}

Local bRight = Pointposinvector (startline,endline,p[1])--the first point of the record rectangle is on the left or right side of the Ray

For i = 2,4 do--traversal of the other three points

If BRight ~= pointposinvector (startline,endline,p[i]) then--if the other vertices are not the same as the left and right edges of the first vertex, then the Rays collide with the rectangle to

return True

End

End

return False

End

function Cc.exports.PointPosInVector (startpos,endpos,v)--Determines the point at the left and right of the vector, true to the left, false to the right, and startpos as the starting point of the vector. Endpos is the end point of the vector, V is the vertex

if (startpos.x-v.x) * (ENDPOS.Y-V.Y)-(STARTPOS.Y-V.Y) * (endpos.x-v.x) > 0 Then

return True

End

return False

End

X-ray and Rectangle detection collision in 2d game