抛物线&轨迹算法

抛物线轨迹算法

local x1=startPos[1]
local y1=startPos[2]
local x3=endPos[1]
local y3=endPos[2]
local width=x3-x1
local x2=x1+width/2
local y2=y1-height

local b=((y1-y3)*(x1*x1-x2*x2)-(y1-y2)*(x1*x1-x3*x3))/((x1-x3)*(x1*x1-x2*x2)-(x1-x2)*(x1*x1-x3*x3))
local a=((y1-y2)-b*(x1-x2))/(x1*x1-x2*x2)
local c= y1-a*x1*x1-b*x1
local vx=width/3--width单位长度/5s
local posx=startPos[1]+vx*deltaTime
local posy= a*math.pow(posx,2)+ b*posx + c

平抛运动

local dir=UnityEngine_Vector3.Normalize(UnityEngine_Vector3(unpack(endPos))-UnityEngine_Vector3(unpack(position)))

posx=posx+hspeeddir.xdeltatime
posy=posy+vSpeeddeltatimevelocityY
velocityY=velocityY-10deltatimevSpeed
SetLocalPosition(posx,posy,0)