Interpolation
Source function vec3.bezier3(vec3 mid, vec3 stop, real p) returns vec3
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 function vec2.bezier3(vec2 mid, vec2 stop, real p) returns vec2
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 function bezier3(real start, real mid, real stop, real p) returns real
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3-Point-Bezier Interpolation
Sample Usage:
AddSpecialEffect(TEST_SFX, bezier3(P1X, P3X, P2X, p), bezier3(P1Y, P3Y, P2Y, p))
 function vec3.bezier4(vec3 mid1, vec3 mid2, vec3 stop, real p) returns vec3
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 function vec2.bezier4(vec2 mid1, vec2 mid2, vec2 stop, real p) returns vec2
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 function bezier4(real start, real mid1, real mid2, real stop, real p) returns real
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4-Point-Bezier Interpolation
Sample Usage:
AddSpecialEffect(TEST_SFX,bezier4(P1X,P3X,P4X,P2X,t),bezier4(P1Y,P3Y,P4Y,P2Y,t))
 function derivBezier3(real start, real mid, real stop, real p) returns real
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This function returns the derivate of the 3-Point-Bezier curve on certain point.
(d(bezier3())/dt)
 function vec3.derivBezier3(vec3 mid, vec3 stop, real p) returns vec3
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 function vec2.derivBezier3(vec2 mid, vec2 stop, real p) returns vec2
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 function derivBezier4(real start, real mid1, real mid2, real stop, real p) returns real
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This function returns the derivate of the 4-Point-Bezier curve on certain point.
(d(bezier4())/dt)
 function vec3.derivBezier4(vec3 mid1, vec3 mid2, vec3 stop, real p) returns vec3
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 function vec2.derivBezier4(vec2 mid1, vec2 mid2, vec2 stop, real p) returns vec2
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 function hermite(real start, real stop, real tangent1, real tangent2, real s) returns real
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 Hermite Interpolation 
 function inTan(real p1, real p2, real p3, real p, real c, real b) returns real
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 Returns the intan of p2 
 function vec3.lerp(vec3 target, real alpha) returns vec3
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 function vec2.lerp(vec2 target, real alpha) returns vec2
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 function linear(vec2 start, vec2 stop, real p) returns vec2
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 Look at linear 
 function linear(real start, real stop, real p) returns real
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Linear Interpolation
Sample Usage:
AddSpecialEffect(TEST_SFX,linear(P1X,P2X,p),linear(P1Y,P2Y,p))
 function outTan(real p1, real p2, real p3, real p, real c, real b) returns real
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 Returns the outtan of p2