public void DrawSolidCircle(FVector2 center, float radius, FVector2 axis, Color 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; Color colorFill = color * 0.5f; FVector2 v0 = center + radius * new FVector2((float)Math.Cos(theta), (float)Math.Sin(theta)); theta += increment; for (int i = 1; i < CircleSegments - 1; i++) { FVector2 v1 = center + radius * new FVector2((float)Math.Cos(theta), (float)Math.Sin(theta)); FVector2 v2 = center + radius * new FVector2((float)Math.Cos(theta + increment), (float)Math.Sin(theta + increment)); triangleListBatch.Add(FDVertex.FromTriangleList(v0, v1, v2, colorFill)); //_primitiveBatch.AddVertex(v0, colorFill, PrimitiveType.TriangleList); //_primitiveBatch.AddVertex(v1, colorFill, PrimitiveType.TriangleList); //_primitiveBatch.AddVertex(v2, colorFill, PrimitiveType.TriangleList); theta += increment; } DrawCircle(center, radius, color); DrawSegment(center, center + axis * radius, color); }
public void DrawSolidPolygon(FVector2[] vertices, int count, Color color, bool outline) { //if (!_primitiveBatch.IsReady()) //{ // throw new InvalidOperationException("BeginCustomDraw must be called before drawing anything."); //} if (count == 2) { DrawPolygon(vertices, count, color); return; } Color colorFill = color * (outline ? 0.5f : 1.0f); for (int i = 1; i < count - 1; i++) { triangleListBatch.Add(FDVertex.FromTriangleList(vertices[0], vertices[i], vertices[i + 1], colorFill)); //_primitiveBatch.AddVertex(vertices[0], colorFill, PrimitiveType.TriangleList); //_primitiveBatch.AddVertex(vertices[i], colorFill, PrimitiveType.TriangleList); //_primitiveBatch.AddVertex(vertices[i + 1], colorFill, PrimitiveType.TriangleList); } if (outline) { DrawPolygon(vertices, count, color); } }