Sounds good, lostclimate. Are you interested in trying to do this for pay?

mediocre history: tD, C-Script, 6.40.5, 6.60
Circles with forgotten old custom C-Script function utilizing draw line commands, and parameters resolution=60, radius=90,60,30, position=?, color=red,green,blue are less appealing than ads on page.
http://testdummy93.tripod.com/3DGS/3DGS_samples.html

That's it! I had forgotten all about that draw_line() command. Time to relearn my trigonometry. Thanks a lot, testDummy!

definately interested if your still up for it

If you got my email, then shoot me a reply so we can discuss. Otherwise, PM me or send a message to the email address in my Profile. Thanks.

Why not make a animated (transparent) sprite with a growing circle?
You can easy define the number of frames, can make the growing logarithmic, and save a lot of cpu power...

For those that like to throw pies, here is a cached draw circle function, simple, raw and unoptimized.
Code:

---

/************************************
	drawCircle3D0
*************************************/
var drawCircleS0[3];
var drawCircleE0[3];

function drawCircle3D0(&_pos, _radius, _res, &_color) {
	var angle0; angle0 = 0;
	var i0; i0 = 0;
	var vec11[3]; 

	while (i0 < (_res + 1)) {
		angle0 = 360 / _res * i0;
		drawCircleE0[0] = 0; drawCircleE0[1] = _radius; drawCircleE0[2] = 0;
		vec_rotate(drawCircleE0, vector(0, 0, angle0));
		vec_add(drawCircleE0, _pos);
		if (i0 > 0) {
			drawLine3D0(drawCircleS0, drawCircleE0, _color, 100);
			//printVec0("drawCircleS0 = ", drawCircleS0);
			//printVec0("drawCircleE0 = ", drawCircleE0);
		}
		//printVar0("angle0 = ", angle0);
		i0 += 1;
		vec_set(drawCircleS0, drawCircleE0);
	}
	
}

---

The previously shown sample, uses a res of 60 divisions or so.
A7 users must pay a fee of 55 Euros to use derivatives of the above function (sub par or not).

THANKS SO MUCH! THIS IS IT!

I would solve that with a shader and a sprite...
passing the distance to the shader and it sets transparence to 0 or 1...

here's the shader...:

Code:

---

float4x4 matWorldViewProj;
float3 lineColor = {0.0,1.0,0.0};
float2 vecSkill41;
float4 vecColor;


void circleVS(	in float4 pos	:POSITION,
					in float2 tex	:TEXCOORD0,
					out float4 oPos:POSITION,
					out float2 oTex:TEXCOORD0)
{
	oPos = mul(pos,matWorldViewProj);
	oTex = tex;
}

float4 circlePS(in float2 texcrd:TEXCOORD0):COLOR
{
	float pDist = distance(float2(0.5,0.5),texcrd);
	float4 Color;
	Color.rgb = lineColor;
	if(pDist>vecSkill41.x-vecSkill41.y&&pDist<vecSkill41.x)
		Color.w = vecColor.w;
	else
		Color.w = 0;
	return Color;
}

technique circle
{
	pass p0
	{
		vertexshader = compile vs_2_0 circleVS();
		pixelshader = compile ps_2_0 circlePS();
	}
}

---

...and here a little script you can try it with
Code:

---

MATERIAL* circleMtl =
{
	effect="circle.fx";
}

void main()
{
	float circleAnm = 0;
	level_load(NULL);
	you=ent_create("circle.tga",nullvector,NULL);
	your.tilt = 90;
	your.skill42 = floatv(0.02);
	your.material = circleMtl;
	set(your,TRANSLUCENT);
	watched=you;
	while(1)
	{
		circleAnm += 0.7*time_step;
		if(circleAnm>50)
			circleAnm=0;
		your.skill41 = floatv(circleAnm/100);
		your.alpha = 100-circleAnm*2;
		wait(1);
	}
}

---

have fun with it...(ofc you can also use more than one line with it )

Well, thanks very much for this. I will certainly try this out!

This reminded me that I haven't posted the code that I came up with from the functions that testDummy provided. If anyone wants to try it, it's here:

http://mccrickard.net/circles.wdl