BezierCurve:evaluate
Available since LÖVE 0.9.0 |
This function is not supported in earlier versions. |
Evaluate Bézier curve at parameter t. The parameter must be between 0 and 1 (inclusive).
This function can be used to move objects along paths or tween parameters. However it should not be used to render the curve, see BezierCurve:render for that purpose.
Contents
Function
Synopsis
x,y = BezierCurve:evaluate(t)
Arguments
number t
- Where to evaluate the curve.
Returns
number x
- x coordinate of the curve at parameter t.
number y
- y coordinate of the curve at parameter t.
Examples
Make a circle follow a curve
local controlPoints = {125,125, 125,225, 175,125, 225,125}
local curve = love.math.newBezierCurve(controlPoints)
function love.draw()
local time = love.timer.getTime()
local loopTime = 4
local t = (time / loopTime) % 1
local x, y = curve:evaluate(t)
love.graphics.circle("fill", x, y, 8)
love.graphics.line(curve:render())
end
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