UnityEditor.LookDevResources.UpdateShadowInfoWithBrightestSpot C# (CSharp) Method

        public static void UpdateShadowInfoWithBrightestSpot(CubemapInfo cubemapInfo)
        {
            m_LookDevCubeToLatlong.SetTexture("_MainTex", cubemapInfo.cubemap);
            m_LookDevCubeToLatlong.SetVector("_WindowParams", new Vector4(10000f, -1000f, 2f, 0f));
            m_LookDevCubeToLatlong.SetVector("_CubeToLatLongParams", new Vector4(0.01745329f * cubemapInfo.angleOffset, 0.5f, 1f, 3f));
            m_LookDevCubeToLatlong.SetPass(0);
            int num = 250;
            int num2 = 0x7d;
            Graphics.Blit(cubemapInfo.cubemap, m_BrightestPointRT, m_LookDevCubeToLatlong);
            m_BrightestPointTexture.ReadPixels(new Rect(0f, 0f, (float) num, (float) num2), 0, 0, false);
            m_BrightestPointTexture.Apply();
            Color[] pixels = m_BrightestPointTexture.GetPixels();
            float num3 = 0f;
            for (int i = 0; i < num2; i++)
            {
                for (int j = 0; j < num; j++)
                {
                    Vector3 vector = new Vector3(pixels[(i * num) + j].r, pixels[(i * num) + j].g, pixels[(i * num) + j].b);
                    float num6 = ((vector.x * 0.2126729f) + (vector.y * 0.7151522f)) + (vector.z * 0.072175f);
                    if (num3 < num6)
                    {
                        Vector2 vector2 = LookDevEnvironmentWindow.PositionToLatLong(new Vector2(((((float) j) / ((float) (num - 1))) * 2f) - 1f, ((((float) i) / ((float) (num2 - 1))) * 2f) - 1f));
                        cubemapInfo.shadowInfo.latitude = vector2.x;
                        cubemapInfo.shadowInfo.longitude = vector2.y - cubemapInfo.angleOffset;
                        num3 = num6;
                    }
                }
            }
        }
    }

            public override void OnGUI(Rect rect)
            {
                GUILayout.BeginVertical();
                {
                    GUILayout.Label(styles.sEnvironment, EditorStyles.miniLabel);
                    EditorGUI.BeginChangeCheck();
                    float angleOffset = EditorGUILayout.Slider(styles.sAngleOffset, m_CubemapInfo.angleOffset % 360.0f, -360.0f, 360.0f);
                    if (EditorGUI.EndChangeCheck())
                    {
                        Undo.RecordObject(m_LookDevView.envLibrary, "Changed environment settings");
                        m_CubemapInfo.angleOffset      = angleOffset;
                        m_LookDevView.envLibrary.dirty = true;
                        m_LookDevView.Repaint();
                    }

                    if (GUILayout.Button(styles.sResetEnv, EditorStyles.toolbarButton))
                    {
                        Undo.RecordObject(m_LookDevView.envLibrary, "Changed environment settings");
                        m_CubemapInfo.ResetEnvInfos();
                        m_LookDevView.envLibrary.dirty = true;
                        m_LookDevView.Repaint();
                    }

                    using (new EditorGUI.DisabledScope(!m_LookDevView.config.enableShadowCubemap))
                    {
                        DrawSeparator();
                        GUILayout.Label(styles.sShadows, EditorStyles.miniLabel);

                        EditorGUI.BeginChangeCheck();
                        float shadowIntensity = EditorGUILayout.Slider(styles.sShadowIntensity, m_CubemapInfo.shadowInfo.shadowIntensity, 0.0f, 5.0f);
                        Color shadowColor     = EditorGUILayout.ColorField(styles.sShadowColor, m_CubemapInfo.shadowInfo.shadowColor);
                        if (EditorGUI.EndChangeCheck())
                        {
                            Undo.RecordObject(m_LookDevView.envLibrary, "Changed shadow settings");
                            m_CubemapInfo.shadowInfo.shadowIntensity = shadowIntensity;
                            m_CubemapInfo.shadowInfo.shadowColor     = shadowColor;
                            m_LookDevView.envLibrary.dirty           = true;
                            m_LookDevView.Repaint();
                        }

                        if (GUILayout.Button(styles.sBrightest, EditorStyles.toolbarButton))
                        {
                            Undo.RecordObject(m_LookDevView.envLibrary, "Changed shadow settings");
                            LookDevResources.UpdateShadowInfoWithBrightestSpot(m_CubemapInfo);
                            m_LookDevView.envLibrary.dirty = true;
                            m_LookDevView.Repaint();
                        }

                        if (GUILayout.Button(styles.sResetShadow, EditorStyles.toolbarButton))
                        {
                            Undo.RecordObject(m_LookDevView.envLibrary, "Changed shadow settings");
                            m_CubemapInfo.SetCubemapShadowInfo(m_CubemapInfo);
                            m_LookDevView.envLibrary.dirty = true;
                            m_LookDevView.Repaint();
                        }
                    }
                }
                GUILayout.EndVertical();
            }