Advice on my CoolDownTimer effects

ankhd · 2014-07-05T12:58:32

Hi all. I've been looking in to making a cooldown timer effect, When you press a button and it has the shading going around. After my third go I think I found a good way to do it but some of the math like the atan2 im doing a flip on to get 360. Ok I know angle's again why??? only thing I know I'm a Ex metal fabricator. Any how the cooldown timer is in the pixel shader using the texture coords and I pass in a angle based on time 1 degree or more a second depends on how fast you want it to spin(go around). It looks like a mess is there a neater way of doing it. What way would you try. //heres the pixel shader this is my test code it works I display red for now for range between 0 and 180 and green when I flip the angle. float4 DrawPStimer(GS_OUT pIn) : SV_TARGET { float2 start = float2(0.0,0.0);//points up float currentangle = radians(345.0); //we need to turn the texture coords into a direction vector ??? //texcoord need to be converted to its 0, 0 pos float2 e = float2(0.5,0.5); float2 t = pIn.texC - e; float2 p = normalize(start - t ); float a2 = atan2(p.y, p.x); if(a2 <= currentangle && a2 > 0.0) return float4(1.0f, 0.0f, 0.0f, 1.0f); if(a2 <= 0) { if(a2+ radians(360) < currentangle) return float4(0.0f, 1.0f, 0.0f, 1.0f); } return float4(0.0f, 0.0f, 0.0f, 0.0f); } here is a image with the current angle set to 275 0 degrees is to the left 180 right new image now

Graphics and GPU Programming Programming

Started by ankhd July 01, 2014 01:19 PM

9 comments, last by ankhd 9 years, 9 months ago

ankhd

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July 05, 2014 12:58 PM

Hey Thanys everyone.

excellent work on the explanation.

I'll do the clip(359.999 - currentangle); thing I reacon.

Why.??? the button image is drawn in the first pass. when the user presses the button it gets set to 1 degree and a buttonevent activated which does the timer update.

I have removed the gs it was there when I was trying the cool down by building circles(but I needed a packman). My google never showed me them links. I always use bad search terms.

Remove all my stuff and you would have a nice tutorial... cheers all.

Advice on my CoolDownTimer effects

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Advice on my CoolDownTimer effects

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