public override void DrawSolidCircle(b2Vec2 center, float radius, b2Vec2 axis, b2Color color)
{
if (!primitiveBatch.IsReady())
{
throw new InvalidOperationException("BeginCustomDraw must be called before drawing anything.");
}
const double increment = Math.PI * 2.0 / CircleSegments;
double theta = 0.0;
var colorFill = color.ToCCColor4B() * 0.5f;
var centr = center.ToCCVector2();
CCVector2 v0 = center.ToCCVector2() + radius * new CCVector2((float)Math.Cos(theta), (float)Math.Sin(theta));
theta += increment;
for (int i = 1; i < CircleSegments - 1; i++)
{
var v1 = centr + radius * new CCVector2((float)Math.Cos(theta), (float)Math.Sin(theta));
var v2 = centr +
radius * new CCVector2((float)Math.Cos(theta + increment), (float)Math.Sin(theta + increment));
primitiveBatch.AddVertex(ref v0, colorFill, PrimitiveType.TriangleList);
primitiveBatch.AddVertex(ref v1, colorFill, PrimitiveType.TriangleList);
primitiveBatch.AddVertex(ref v2, colorFill, PrimitiveType.TriangleList);
theta += increment;
}
DrawCircle(center, radius, color);
DrawSegment(center, center + axis * radius, color);
}
public override void DrawCircle(b2Vec2 center, float radius, b2Color color)
{
if (!primitiveBatch.IsReady())
{
throw new InvalidOperationException("BeginCustomDraw must be called before drawing anything.");
}
const double increment = Math.PI * 2.0 / CircleSegments;
double theta = 0.0;
var col = color.ToCCColor4B();
CCVector2 centr = center.ToCCVector2();
for (int i = 0, count = CircleSegments; i < count; i++)
{
CCVector2 v1 = (centr + radius * new CCVector2((float)Math.Cos(theta), (float)Math.Sin(theta))) * PTMRatio;
CCVector2 v2 = (centr +
radius *
new CCVector2((float)Math.Cos(theta + increment), (float)Math.Sin(theta + increment))) * PTMRatio;
primitiveBatch.AddVertex(ref v1, col, PrimitiveType.LineList);
primitiveBatch.AddVertex(ref v2, col, PrimitiveType.LineList);
theta += increment;
}
}
public override void DrawSegment(b2Vec2 p1, b2Vec2 p2, b2Color color)
{
if (!primitiveBatch.IsReady())
{
throw new InvalidOperationException("BeginCustomDraw must be called before drawing anything.");
}
primitiveBatch.AddVertex(p1.ToCCVector2() * PTMRatio, color.ToCCColor4B(), PrimitiveType.LineList);
primitiveBatch.AddVertex(p2.ToCCVector2() * PTMRatio, color.ToCCColor4B(), PrimitiveType.LineList);
}