Add support for Bezier curves of arbitrary degree.

New functions:

bezier = love.math.newBezierCurve(control-points)
degree = bezier:getDegree() -- degree = #control-points - 1
x,y = bezier:getControlPoint(pos) -- pos < 0 => string.sub semantics
bezier:setControlPoint(pos, x, y) -- pos < 0 => string.sub semantics
bezier:insertControlPoint(x,y, [pos = -1])
x,y = bezier:eval(t) -- 0 <= t <= 1
polyline = bezier:render([accuracy = 5]) -- returns a table of points

Example:

function love.load()
	b = love.math.newBezierCurve(10,10, 80,400, 380,400, 470,10)
end

function love.draw()
	if not curve then -- curve rendering is expensive-ish
		curve = b:render()
	end
	love.graphics.line(curve)
end

src/common/runtime.cpp

@@ -503,6 +503,7 @@ StringMap<Type, TYPE_MAX_ENUM>::Entry typeEntries[] =
 
 	// Math
 	{"RandomGenerator", MATH_RANDOM_GENERATOR_ID},
+	{"BezierCurve", MATH_BEZIER_CURVE_ID},
 
 	// Audio
 	{"Source", AUDIO_SOURCE_ID},

src/common/types.h

@@ -60,6 +60,7 @@ enum Type
 
 	// Math
 	MATH_RANDOM_GENERATOR_ID,
+	MATH_BEZIER_CURVE_ID,
 
 	// Audio
 	AUDIO_SOURCE_ID,
@@ -136,6 +137,7 @@ const bits IMAGE_COMPRESSED_DATA_T = (bits(1) << IMAGE_COMPRESSED_DATA_ID) | DAT
 
 // Math.
 const bits MATH_RANDOM_GENERATOR_T = (bits(1) << MATH_RANDOM_GENERATOR_ID) | OBJECT_T;
+const bits MATH_BEZIER_CURVE_T = (bits(1) << MATH_BEZIER_CURVE_ID) | OBJECT_T;
 
 // Audio.
 const bits AUDIO_SOURCE_T = (bits(1) << AUDIO_SOURCE_ID) | OBJECT_T;