Difference between revisions of "BezierCurve:evaluate"
m (→See Also: forum linked.) |
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Line 14: | Line 14: | ||
{{param|number|x|x coordinate of the curve at parameter t.}} | {{param|number|x|x coordinate of the curve at parameter t.}} | ||
{{param|number|y|y coordinate of the curve at parameter t.}} | {{param|number|y|y coordinate of the curve at parameter t.}} | ||
+ | === Example === | ||
+ | Get list of coordinate pairs: | ||
+ | <source lang="lua"> | ||
+ | local BezierCurve = love.math.newBezierCurve({25,25,75,50,125,25}) | ||
+ | local list = {} | ||
+ | local subdivisions = 2^3 | ||
+ | local line = {} | ||
+ | for i = 0, subdivisions do | ||
+ | local t = i/subdivisions | ||
+ | print (t) | ||
+ | local x, y = BezierCurve:evaluate(t) | ||
+ | table.insert (line, x) | ||
+ | table.insert (line, y) | ||
+ | end | ||
+ | love.graphics.line(line) | ||
+ | </source> | ||
+ | |||
== See Also == | == See Also == | ||
* [[parent::BezierCurve]] | * [[parent::BezierCurve]] |
Revision as of 13:53, 21 November 2021
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.
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.
Example
Get list of coordinate pairs:
local BezierCurve = love.math.newBezierCurve({25,25,75,50,125,25})
local list = {}
local subdivisions = 2^3
local line = {}
for i = 0, subdivisions do
local t = i/subdivisions
print (t)
local x, y = BezierCurve:evaluate(t)
table.insert (line, x)
table.insert (line, y)
end
love.graphics.line(line)
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