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199 行
4.3 KiB
199 行
4.3 KiB
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CoVector2 = CoVector2 or BaseClass()
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local CoVector2 = CoVector2
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function CoVector2:__init(x, y)
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self.x = x
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self.y = y
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-- local now_time = Status.NowTime
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-- if CoVector2.cache_time == nil or CoVector2.cache_time < now_time then
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-- -- if CoVector2.call_num == 1 then
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-- print("创建Vector2个数", CoVector2.call_num, now_time)
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-- -- print(xxxxx+3)
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-- -- end
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-- CoVector2.call_num = 0
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-- CoVector2.cache_time = now_time
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-- end
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-- CoVector2.call_num = CoVector2.call_num + 1
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-- if CoVector2.call_num >1 then
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-- -- print("创建Vector2个数", CoVector2.call_num, now_time)
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-- print(xxxxx+3)
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-- end
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local meta_table = getmetatable(self)
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meta_table.__add = function (v1, v2)
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return CoVector2.New(v1.x + v2.x, v1.y + v2.y)
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end
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meta_table.__sub = function (v1, v2)
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return CoVector2.New(v1.x - v2.x, v1.y - v2.y)
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end
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meta_table.__mul = function (v1, v2)
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local f = tonumber(v2)
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if f ~= nil then
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return CoVector2.New(v1.x * f, v1.y * f)
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else
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-- print("~+~+~+ co.Vector2 相乘2", v1.x, v1.y, v2.x, v2.y)
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return CoVector2.New(v1.x * v2.x, v1.y * v2.y)
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end
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end
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meta_table.__div = function (v1, v2)
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local f = tonumber(v2)
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if f ~= nil then
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return CoVector2.New(v1.x / f, v1.y / f)
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else
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return CoVector2.New(v1.x / v2.x, v1.y / v2.y)
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end
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end
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meta_table.__tostring = function (v1)
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return string.format("co.Vector2(%.4f, %.4f)", v1.x, v1.y)
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end
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end
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function CoVector2:__defineVar()
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return {
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_class_type = self,
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--_cid = self._id,
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_iid = _in_obj_ins_id,
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x = 0,
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y = 0
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}
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end
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function CoVector2:__delete()
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-- body
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end
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function CoVector2:copyVector2(v)
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self.x, self.y = v.x, v.y
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end
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function CoVector2:setXY(x, y)
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self.x, self.y = x, y
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end
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function CoVector2:Mul(x, y)
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y = y or x
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if x and y then
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self.x, self.y = self.x * x, self.y * y
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end
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end
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function CoVector2:length()
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return math.sqrt(self.x * self.x + self.y * self.y)
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end
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function CoVector2:squaredLength()
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return self.x * self.x + self.y * self.y
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end
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--把对象存进缓存队列
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function CoVector2:DeleteV()
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local free_num = co.free_vector2_num
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if co.free_vector2_num < 100 then
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co.free_vector2_num = free_num + 1
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co.free_vector2_list[free_num+1] = self
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end
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end
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function CoVector2:normalise()
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local l = math.sqrt(self.x * self.x + self.y * self.y)
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if l >= 1e-6 then
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local f = 1 / l
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self.x = self.x * f
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self.y = self.y * f
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end
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return l
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end
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function CoVector2:distance(v2)
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local dx = self.x - v2.x
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local dy = self.y - v2.y
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return math.sqrt(dx * dx + dy * dy)
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end
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function CoVector2:squaredDistance(v2)
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local dx = self.x - v2.x
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local dy = self.y - v2.y
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return dx * dx + dy * dy
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end
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function CoVector2:dotProduct(v2)
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return self.x * v2.x + self.y * v2.y
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end
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function CoVector2:crossProduct(v2)
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return self.x * v2.y - self.y * v2.x
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end
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function CoVector2:angleBetween(v2)
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local lenProduct = self:length() * v2:length()
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if lenProduct < 1e-6 then
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lenProduct = 1e-6
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end
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local f = self:dotProduct(v2) / lenProduct
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if f < -1 then
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f = -1
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elseif f > 1 then
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f = 1
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end
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return math.acos(f)
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end
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--返回值顺时针方向为正角度
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function CoVector2:angleTo(v2)
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local angle = self:angleBetween(v2)
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if self:crossProduct(v2) < 0 then
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angle = math.pi * 2 - angle
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end
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return angle
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end
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function CoVector2:toGameVector2()
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if self.game_vector2 == nil then
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self.game_vector2 = Game.Vector2(self.x, self.y)
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else
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self.game_vector2.x = self.x
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self.game_vector2.y = self.y
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end
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return self.game_vector2
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end
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--沿着dir方向移动dist距离
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function CoVector2:Move(dir, dist)
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self.x = self.x + dir.x * dist
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self.y = self.y + dir.y * dist
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end
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--把V1向量按照“X轴正方向转到V2方向”的方式旋转
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function CoVector2:rotateFromXAxisTo(v2, proj_modify)
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local r1 = co.XAix:angleTo(self)
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local r2 = co.XAix:angleTo(v2)
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local r = r1 + r2
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local l = self:length()
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local cos_r = math.cos(r)
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local sin_r = math.sin(r)
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--在转到90度的时候要缩短一些，以产生透视效果
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local p = proj_modify and (cos_r * 0.2929 + 0.7071) or 1
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self.x, self.y = cos_r * l, sin_r * l * p
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return self
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end
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--radian为正数时顺时针旋转
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function CoVector2:rotate(radian )
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local r = co.XAix:angleTo(self)
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r = r + radian
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local l = self:length()
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local cos_r = math.cos(r)
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local sin_r = math.sin(r)
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self.x, self.y = cos_r * l, sin_r * l
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return self
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end
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