Polybezier() - How to draw a sinus/cosinus?

eriansa · Post by **eriansa** » Mon Jan 14, 2008 9:32 pm

title says it all.

i need the points coordinates.

Derek · Post by **Derek** » Mon Jan 14, 2008 9:58 pm

This help at all?

OpenWindow(0,0,0,800,600,"",$ca0001)
InitSprite()
OpenWindowedScreen(WindowID(0),0,0,800,600,0,0,0)

*points=AllocateMemory(2*4*4)
PokeL(*points,100);start
PokeL(*points+4,100)

PokeL(*points+8,300);control
PokeL(*points+12,20)

PokeL(*points+16,500);control
PokeL(*points+20,580)

PokeL(*points+24,700);end
PokeL(*points+28,500)
hdc=StartDrawing(ScreenOutput())
FrontColor(#White)
PolyBezier_(hdc,*points,4)
StopDrawing()

Repeat
Until WaitWindowEvent()=16

eriansa · Post by **eriansa** » Mon Jan 14, 2008 11:22 pm

Not exactly, the curve is not complete.

Perhaps a mathematical formula to calculate those points?
I am a math noob...

Derek · Post by **Derek** » Mon Jan 14, 2008 11:27 pm

Can you explain a bit better what you want, is it just a sin wave?

eriansa · Post by **eriansa** » Mon Jan 14, 2008 11:46 pm

Well, I thought there could be some mathematical function to calculate the points needed, to let the PolyBezier_() Api function draw an exact sine wave.

Sure I can start drawing and find the points more or less, but a function would be much easier

hellhound66 · Post by **hellhound66** » Fri Feb 08, 2008 10:23 pm

Removed.

eriansa · Post by **eriansa** » Sat Feb 09, 2008 2:16 am

Calculates Sin-values. Really.

Sure, but that's not the question