{
    "description": "The task involves a trirectangular tetrahedron which forms a initially tight fit with its complementary base fixed on the table. Then, the trirectangular tetrahedron is released and falls under its own gravity.",
    "prompt": "Static frontal camera view: A solid wooden trirectangular tetrahedron (mass ≈ 84 g) is tightly wedged against its stationary matching base (mass ≈ 997 g) atop a black perforated optical table. The two components combine to form a single upright rectangular block divided by a diagonal contact seam. Coefficient of friction for wood-on-wood contact ≈ 0.39; coefficient of restitution ≈ 0.37. An out-of-frame tension string securing the tetrahedron is released, after which frictional forces alone are insufficient to retain the tetrahedron on the base’s inclined surface. The tetrahedron follows a sequence of rigid-body motion governed by gravity: sliding along the slope, detaching fully from the base, free falling through air, potentially bouncing or tumbling upon impact, and finally settling into a stable resting configuration. The complementary base remains entirely stationary for the full duration of the motion event.",
    "assets": {
        "teh": {
            "model": "../../assets/obj/teh.obj",
            "material": {
                "wood": {
                    "mass": 0.0839,
                    "density": 503.4,
                    "friction": 0.388428,
                    "restitution": 0.370309
                },
                "plastic": {
                    "mass": 0.0529,
                    "density": 317.4,
                    "friction": 0.182460,
                    "restitution": 0.307058
                }
            }
        },
        "base": {
            "model": "../../assets/obj/tehC.obj",
            "material": {
                "wood": {
                    "mass": 0.9969,
                    "density": 543.7636,
                    "friction": 0.388428,
                    "restitution": 0.370309
                },
                "plastic": {
                    "mass": 0.4104,
                    "density": 223.8545,
                    "friction": 0.182460,
                    "restitution": 0.307058
                }
            }
        }
    },
    "tasks": {
        "default": {
            "assets": ["teh", "base"],
            "translation": {
                "teh": {
                    "wood": [0.504278, 0.408961, 0.180622],
                    "plastic": [0.505473, 0.406877, 0.180174]
                },
                "base": {
                    "wood": [0.468923, 0.408961, 0.105622],
                    "plastic": [0.470118, 0.406877, 0.105174]
                },
                "ground": {
                    "wood":[0, 0, 0.005622],
                    "plastic": [0, 0, 0.005174]
                }
            },
            "orientation": {
                "teh": {
                    "wood": [0, 0, 0],
                    "plastic": [0, 0, 0]
                },
                "base": {
                    "wood": [0, 0, 0],
                    "plastic": [0, 0, 0]
                }
            },
            "fixed": {
                "teh": false,
                "base": true
            },
            "kinematic": {
                "teh": false,
                "base": false
            },
            "record": {
                "assets": ["teh"],
                "dim": ["x", "y", "z"],
                "fps": 30
            }
        }
    }
}