Function DrawCone

Source/Engine/Debug/DebugDraw.cpp:2043–2088

    }

    void DrawCone(Array<DebugTriangle>* list, const Vector3& position, const Quaternion& orientation, float radius, float angleXY, float angleXZ, const Color& color, float duration)
    {
        PROFILE_MEM(EngineDebug);
        const float tolerance = 0.001f;
        const float angle1 = Math::Clamp(angleXY, tolerance, PI - tolerance);
        const float angle2 = Math::Clamp(angleXZ, tolerance, PI - tolerance);

        const float sinX1 = Math::Sin(0.5f * angle1);
        const float sinY2 = Math::Sin(0.5f * angle2);
        const float sinSqX1 = sinX1 * sinX1;
        const float sinSqY2 = sinY2 * sinY2;

        DebugTriangle t;
        t.Color = Color32(color);
        t.TimeLeft = duration;
        const Float3 positionF = position - Context->Origin;
        const Matrix world = Matrix::RotationQuaternion(orientation) * Matrix::Translation(positionF);
        t.V0 = world.GetTranslation();

        Float3 vertices[DEBUG_DRAW_CONE_RESOLUTION];
        for (uint32 i = 0; i < DEBUG_DRAW_CONE_RESOLUTION; i++)
        {
            const float alpha = (float)i / (float)DEBUG_DRAW_CONE_RESOLUTION;
            const float azimuth = alpha * TWO_PI;

            const float phi = Math::Atan2(Math::Sin(azimuth) * sinY2, Math::Cos(azimuth) * sinX1);
            const float sinPhi = Math::Sin(phi);
            const float cosPhi = Math::Cos(phi);
            const float sinSqPhi = sinPhi * sinPhi;
            const float cosSqPhi = cosPhi * cosPhi;

            const float rSq = sinSqX1 * sinSqY2 / (sinSqX1 * sinSqPhi + sinSqY2 * cosSqPhi);
            const float r = Math::Sqrt(rSq);
            const float s = Math::Sqrt(1 - rSq);

            Float3 vertex = Float3(2 * s * (r * cosPhi), 2 * s * (r * sinPhi), 1 - 2 * rSq) * radius;
            Float3::Transform(vertex, world, vertices[i]);
        }

        for (uint32 i = 0; i < DEBUG_DRAW_CONE_RESOLUTION; i++)
        {
            t.V1 = vertices[i];
            t.V2 = vertices[(i + 1) % DEBUG_DRAW_CONE_RESOLUTION];
            list->Add(t);
        }
    }
}

void DebugDraw::DrawCylinder(const Vector3& position, const Quaternion& orientation, float radius, float height, const Color& color, float duration, bool depthTest)