if (shadowType == stHARD) {
                        inShadow = (sv.z - bias > shadowMap.access(sv.x, sv.y)) ? 1.0f : 0.0f;
                    } else {
                        int xShadowEnv, yShadowEnv;
                        float sum = 0;
                        for (int x = -1; x < 2; ++x) {
                            for (int y = -1; y < 2; ++y) {
                                xShadowEnv = sv.x+x;
                                yShadowEnv = sv.y+y;
                                if (sv.z - bias > shadowMap.access(xShadowEnv, yShadowEnv)) {
                                    sum += 1.0f;
                                }
                            }
                        }
                        inShadow = sum / 9.0f;
                        //std::cout << inShadow << std::endl;
                    }