Method DrawCircle

Source/Engine/Debug/DebugDraw.cpp:1483–1521

}

void DebugDraw::DrawCircle(const Vector3& position, const Float3& normal, float radius, const Color& color, float duration, bool depthTest)
{
    // Create matrix transform for unit circle points
    Matrix world, scale, matrix;
    Float3 right, up;
    if (Float3::Dot(normal, Float3::Up) > 0.99f)
        right = Float3::Right;
    else if (Float3::Dot(normal, Float3::Down) > 0.99f)
        right = Float3::Left;
    else
        Float3::Cross(normal, Float3::Up, right);
    Float3::Cross(right, normal, up);
    Matrix::Scaling(radius, scale);
    const Float3 positionF = position - Context->Origin;
    Matrix::CreateWorld(positionF, normal, up, world);
    Matrix::Multiply(scale, world, matrix);

    // Draw lines of the unit circle after linear transform
    PROFILE_MEM(EngineDebug);
    Float3 prev = Float3::Transform(CircleCache[0], matrix);
    auto& debugDrawData = depthTest ? Context->DebugDrawDepthTest : Context->DebugDrawDefault;
    for (int32 i = 1; i < DEBUG_DRAW_CIRCLE_VERTICES;)
    {
        Float3 cur = Float3::Transform(CircleCache[i++], matrix);
        if (duration > 0)
        {
            DebugLine l = { prev, cur, Color32(color), duration };
            debugDrawData.DefaultLines.Add(l);
        }
        else
        {
            Vertex l = { prev, Color32(color) };
            debugDrawData.OneFrameLines.Add(l);
            l.Position = cur;
            debugDrawData.OneFrameLines.Add(l);
        }
        prev = cur;
    }
}

void DebugDraw::DrawWireTriangle(const Vector3& v0, const Vector3& v1, const Vector3& v2, const Color& color, float duration, bool depthTest)
{