public override void DrawCircle(cpVect center, float radius, cpColor color)
{
if (!primitiveBatch.IsReady())
{
throw new InvalidOperationException("BeginCustomDraw must be called before drawing anything.");
}
const float increment = cp.M_PI * 2.0f / CircleSegments;
float theta = 0.0f;
var col = color;
var colorOutline = col.ToCCColor4B();
CCVector2 centr = center.ToCCVector2();
CCVector2 thetaV = CCVector2.Zero;
for (int i = 0, count = CircleSegments; i < count; i++)
{
thetaV.X = cp.cpfcos(theta);
thetaV.Y = cp.cpfsin(theta);
CCVector2 v1 = centr + Convert.ToSingle(radius) * thetaV;
thetaV.X = cp.cpfcos(theta + increment);
thetaV.Y = cp.cpfsin(theta + increment);
CCVector2 v2 = centr +
Convert.ToSingle(radius) *
thetaV;
primitiveBatch.AddVertex(ref v1, colorOutline, PrimitiveType.LineList);
primitiveBatch.AddVertex(ref v2, colorOutline, PrimitiveType.LineList);
theta += increment;
}
}
public override void DrawSolidCircle(cpVect center, float radius, cpVect axis, cpColor color)
{
float segments = (10 * cp.cpfsqrt(radius)); //<- Let's try to guess at # segments for a reasonable smoothness
var colorOutline = color.ToCCColor4B();
var colorFill = colorOutline * 0.5f;
var centr = center.ToCCVector2();
if (!primitiveBatch.IsReady())
{
throw new InvalidOperationException("BeginCustomDraw must be called before drawing anything.");
}
float increment = cp.M_PI * 2.0f / segments;
float theta = 0.0f;
CCVector2 thetaV = new CCVector2((float)Math.Cos(theta), (float)Math.Sin(theta));
CCVector2 v0 = center.ToCCVector2() + (float)radius * thetaV;
theta += increment;
var v1 = CCVector2.Zero;
var v2 = CCVector2.Zero;
for (int i = 0, count = (int)segments; i < count; i++)
{
thetaV.X = (float)Math.Cos(theta);
thetaV.Y = (float)Math.Sin(theta);
v1 = centr + Convert.ToSingle(radius) * thetaV;
thetaV.X = (float)Math.Cos(theta + increment);
thetaV.Y = (float)Math.Sin(theta + increment);
v2 = centr +
Convert.ToSingle(radius) * thetaV;
primitiveBatch.AddVertex(ref v0, colorFill, PrimitiveType.TriangleList);
primitiveBatch.AddVertex(ref v1, colorFill, PrimitiveType.TriangleList);
primitiveBatch.AddVertex(ref v2, colorFill, PrimitiveType.TriangleList);
primitiveBatch.AddVertex(ref v1, colorOutline, PrimitiveType.LineList);
primitiveBatch.AddVertex(ref v2, colorOutline, PrimitiveType.LineList);
theta += increment;
}
DrawSegment(center, center + axis * radius, color);
}