UnityEditor.AvatarPreview.RenderPreviewShadowmap C# (CSharp) Méthode

        private RenderTexture RenderPreviewShadowmap(Light light, float scale, Vector3 center, Vector3 floorPos, out Matrix4x4 outShadowMatrix)
        {
            Camera camera = this.m_PreviewUtility.m_Camera;
            camera.orthographic = true;
            camera.orthographicSize = scale * 2f;
            camera.nearClipPlane = 1f * scale;
            camera.farClipPlane = 25f * scale;
            camera.transform.rotation = light.transform.rotation;
            camera.transform.position = center - ((Vector3) (light.transform.forward * (scale * 5.5f)));
            CameraClearFlags clearFlags = camera.clearFlags;
            camera.clearFlags = CameraClearFlags.Color;
            Color backgroundColor = camera.backgroundColor;
            camera.backgroundColor = new Color(0f, 0f, 0f, 0f);
            RenderTexture targetTexture = camera.targetTexture;
            RenderTexture texture2 = RenderTexture.GetTemporary(0x100, 0x100, 0x10);
            texture2.isPowerOfTwo = true;
            texture2.wrapMode = TextureWrapMode.Clamp;
            texture2.filterMode = FilterMode.Bilinear;
            camera.targetTexture = texture2;
            this.SetPreviewCharacterEnabled(true, false);
            this.m_PreviewUtility.m_Camera.Render();
            RenderTexture.active = texture2;
            GL.PushMatrix();
            GL.LoadOrtho();
            this.m_ShadowMaskMaterial.SetPass(0);
            GL.Begin(7);
            GL.Vertex3(0f, 0f, -99f);
            GL.Vertex3(1f, 0f, -99f);
            GL.Vertex3(1f, 1f, -99f);
            GL.Vertex3(0f, 1f, -99f);
            GL.End();
            GL.LoadProjectionMatrix(camera.projectionMatrix);
            GL.LoadIdentity();
            GL.MultMatrix(camera.worldToCameraMatrix);
            this.m_ShadowPlaneMaterial.SetPass(0);
            GL.Begin(7);
            float x = 5f * scale;
            GL.Vertex(floorPos + new Vector3(-x, 0f, -x));
            GL.Vertex(floorPos + new Vector3(x, 0f, -x));
            GL.Vertex(floorPos + new Vector3(x, 0f, x));
            GL.Vertex(floorPos + new Vector3(-x, 0f, x));
            GL.End();
            GL.PopMatrix();
            Matrix4x4 matrixx = Matrix4x4.TRS(new Vector3(0.5f, 0.5f, 0.5f), Quaternion.identity, new Vector3(0.5f, 0.5f, 0.5f));
            outShadowMatrix = (matrixx * camera.projectionMatrix) * camera.worldToCameraMatrix;
            camera.orthographic = false;
            camera.clearFlags = clearFlags;
            camera.backgroundColor = backgroundColor;
            camera.targetTexture = targetTexture;
            return texture2;
        }