Speedometer. - Socoder

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Socoder -> On Topic -> Speedometer.
Mon, 28 Apr 2008, 12:00
DrOnuki	How do I implement a graphical speedometer into my game? I don't have a problem with making it, but the problem is I don't know how to implement it, do I need a sprite sheet? Thanks! -=-=- zzzzzzzzzzzzzzz
Mon, 28 Apr 2008, 12:52
Jayenkai	Tricky if you're using Blitz, and a wide variety of difficulties in other languages, too. If you want a circular one, it's going to be hard. The easiest thing I can think of is to draw a background circular image, then draw a few lines over the top, which start thick in the middle, and end up at a point at the edge.. x=100 y=100 width=200 height=200 Drawimage Speedometer,x,y Speed=100 ; I'll let you figure this bit out! for angle=-5 to 5 Line x+(width/2)+(sin(Speed+Ang)4),y+(height/2)-(cos(Speed+Ang)4),x+(width/2)+(sin(Speed)(width0.4)),y+(height/2)-(cos(Speed)(height0.4)) next --v At work, so can't double check, but it should be something to that effect!! -=-=- ''Load, Next List!''
Mon, 28 Apr 2008, 14:36
Forklift_Fred	Very crude but demonstrative... Graphics 640,480 SetBuffer BackBuffer() speed=0 While Not KeyHit(1) Cls Text 20,20,"Use Up and Down deys to change speed : "+speed If KeyDown(200) And speed<200 Then speed=speed+1 If KeyDown(208) And speed>0 Then speed=speed-1 DrawSpeedo(300,300,100,speed) Flip Wend End Function DrawSpeedo(x,y,radius,speed) diameter=radius2 Color 255,255,255 Oval x-radius,y-radius,diameter,diameter,1 Color 0,0,0 For n=0 To 200 Step 20 Text x+Cos(180+n)(radius-15),y+Sin(180+n)(radius-15),n,1,1 Next Color 255,0,0 Line x,y,x+Cos(180+speed)radius,y+Sin(180+speed)*radius End Function --v Replace the Oval with your own background image, scale the speed as necessary, etc. The 120 is added to the Cos() and Sin() to start the zero speed at the 7 o'clock position rather than 3 o'clock. If you want to use a semicircle display then set it to 180. It's a starting point at least -=-=- Come rain or shine...