NullBite
b79ec7db1f
- new doesn't use self - better type checking for getUV - make parameters for .new optional
69 lines
1.9 KiB
Lua
69 lines
1.9 KiB
Lua
-- TODO: accept model part for built-in UV management, automatic texture size
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local mt={}
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--- @class UVManager
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UVManager = {
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step=vec(0,0),
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offset=vec(0,0),
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positions={},
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part=nil,
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dimensions=nil
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}
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mt.__index=UVManager
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--- @return UVManager
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--- @param step? Vector2 A vector representing the distance between UVs
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--- @param offset? Vector2 A vector represnting the starting point for UVs, or nil
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--- @param positions? table A dictionary of names and offset vectors
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--- @param part? ModelPart Model part to manage
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function UVManager.new(step, offset, positions, part)
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local t={}
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if step ~= nil then t.step=step end
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if offset ~= nil then t.offset=offset end
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if positions ~= nil then t.positions=positions end
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if part ~= nil then
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UVManager.setPart(t, part)
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end
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t=setmetatable(t, mt)
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return t
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end
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--- @param part ModelPart Model part to manage
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function UVManager.setPart(self, part)
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self.part=part
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self.dimensions=part:getTextureSize()
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end
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---Get real UV from vec(x, y) or string representing preset
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---@param input Vector2|string UV to get
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function UVManager.getUV(self, input)
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local vect={}
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local stp=self.step
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local offset=self.offset
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assert(type(input)=="string" or type(input) == "Vector2")
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if type(input) == "string" then
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if self.positions[input] == nil then return nil end
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vect=self.positions[input]
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elseif type(input) == "Vector2" then
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-- vect=vectors.of(input)
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vect=input
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end
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local u=offset.x+(vect.x*stp.x)
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local v=offset.y+(vect.y*stp.y)
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if self.dimensions ~= nil then
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-- TODO override for my specific texture, replace this with matrix stuff
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-- (get rid of division once you figure out how setUVMatrix works)
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return vec(u/(self.dimensions.x/2), v/(self.dimensions.y/2))
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else
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return util.UV{u, v}
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end
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end
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function UVManager.setUV(self, input)
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if self.part == nil then return false end
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self.part:setUV(self:getUV(input))
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end
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return UVManager
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