{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "$id": "ignis.schema.json",
    "title": "Ignis Scene Description",
    "description": "Ignis scene description language",
    "type": "object",
    "properties": {
        "technique": {
            "$ref": "#/definitions/Technique"
        },
        "camera": {
            "$ref": "#/definitions/Camera"
        },
        "film": {
            "$ref": "#/definitions/Film"
        },
        "externals": {
            "description": "List of external files",
            "type": "array",
            "items": {
                "$ref": "#/definitions/External"
            },
            "uniqueItems": true
        },
        "textures": {
            "description": "List of textures",
            "type": "array",
            "items": {
                "$ref": "#/definitions/Texture"
            },
            "uniqueItems": true
        },
        "bsdfs": {
            "description": "List of bsdfs",
            "type": "array",
            "items": {
                "$ref": "#/definitions/BSDF"
            },
            "uniqueItems": true
        },
        "media": {
            "description": "List of volumes",
            "type": "array",
            "items": {
                "$ref": "#/definitions/Medium"
            },
            "uniqueItems": true
        },
        "shapes": {
            "description": "List of shapes",
            "type": "array",
            "items": {
                "$ref": "#/definitions/Shape"
            },
            "uniqueItems": true
        },
        "entities": {
            "description": "List of entities",
            "type": "array",
            "items": {
                "$ref": "#/definitions/Entity"
            },
            "uniqueItems": true
        },
        "lights": {
            "description": "List of lights",
            "type": "array",
            "items": {
                "$ref": "#/definitions/Light"
            },
            "uniqueItems": true
        }
    },
    "definitions": {
        "External": {
            "description": "External properties",
            "type": "object",
            "required": [
                "filename"
            ],
            "properties": {
                "type": {
                    "type": "string"
                },
                "filename": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Technique": {
            "description": "Technique properties",
            "type": "object",
            "required": [
                "type"
            ],
            "properties": {
                "type": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Camera": {
            "description": "Camera properties",
            "type": "object",
            "required": [],
            "properties": {
                "type": {
                    "type": "string"
                },
                "transform": {
                    "$ref": "#/definitions/Transform"
                }
            },
            "additionalProperties": true
        },
        "Film": {
            "description": "Film/Image properties",
            "type": "object",
            "required": [
                "size"
            ],
            "properties": {
                "size": {
                    "$ref": "#/definitions/Size"
                },
                "sampler": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Texture": {
            "description": "Texture properties",
            "type": "object",
            "required": [
                "type",
                "name"
            ],
            "properties": {
                "type": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "BSDF": {
            "description": "BSDF properties",
            "type": "object",
            "required": [
                "type",
                "name"
            ],
            "properties": {
                "type": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Medium": {
            "description": "Medium/Volume properties",
            "type": "object",
            "required": [
                "type",
                "name"
            ],
            "properties": {
                "type": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Shape": {
            "description": "Shape properties",
            "type": "object",
            "required": [
                "type",
                "name"
            ],
            "properties": {
                "type": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                },
                "filename": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Entity": {
            "description": "Entity properties",
            "type": "object",
            "required": [
                "name",
                "shape"
            ],
            "properties": {
                "type": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                },
                "transform": {
                    "$ref": "#/definitions/Transform"
                },
                "bsdf": {
                    "type": "string"
                },
                "shape": {
                    "type": "string"
                },
                "inner_medium": {
                    "type": "string"
                },
                "outer_medium": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Light": {
            "description": "Light properties",
            "type": "object",
            "required": [
                "type",
                "name"
            ],
            "properties": {
                "type": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                }
            },
            "additionalProperties": true
        },
        "Transform": {
            "description": "Transform properties (proxy)",
            "oneOf": [
                {
                    "$ref": "#/definitions/TransformObject"
                },
                {
                    "$ref": "#/definitions/Matrix3x3"
                },
                {
                    "$ref": "#/definitions/Matrix3x4"
                },
                {
                    "$ref": "#/definitions/Matrix4x4"
                }
            ]
        },
        "TransformObject": {
            "description": "Transform properties",
            "type": "array",
            "required": [],
            "items": [
                {
                    "type": "object",
                    "properties": {
                        "translate": {
                            "$ref": "#/definitions/Vector3"
                        }
                    }
                },
                {
                    "type": "object",
                    "properties": {
                        "rotate": {
                            "$ref": "#/definitions/Vector4"
                        }
                    }
                },
                {
                    "type": "object",
                    "properties": {
                        "scale": {
                            "oneOf": [
                                {
                                    "$ref": "#/definitions/Vector3"
                                },
                                {
                                    "type": "number"
                                }
                            ]
                        }
                    }
                },
                {
                    "type": "object",
                    "properties": {
                        "matrix": {
                            "oneOf": [
                                {
                                    "$ref": "#/definitions/Matrix3x3"
                                },
                                {
                                    "$ref": "#/definitions/Matrix3x4"
                                },
                                {
                                    "$ref": "#/definitions/Matrix4x4"
                                }
                            ]
                        }
                    }
                },
                {
                    "type": "object",
                    "properties": {
                        "lookat": {
                            "$ref": "#/definitions/Lookat"
                        }
                    }
                }
            ]
        },
        "Lookat": {
            "description": "Lookat properties",
            "type": "object",
            "required": [],
            "properties": {
                "origin": {
                    "$ref": "#/definitions/Vector3"
                },
                "up": {
                    "$ref": "#/definitions/Vector3"
                },
                "target": {
                    "$ref": "#/definitions/Vector3"
                },
                "direction": {
                    "$ref": "#/definitions/Vector3"
                }
            }
        },
        "Size": {
            "type": "array",
            "minItems": 2,
            "maxItems": 2,
            "items": {
                "type": "number"
            }
        },
        "Vector3": {
            "type": "array",
            "minItems": 3,
            "maxItems": 3,
            "items": {
                "type": "number"
            }
        },
        "Vector4": {
            "type": "array",
            "minItems": 4,
            "maxItems": 4,
            "items": {
                "type": "number"
            }
        },
        "Matrix3x3": {
            "type": "array",
            "minItems": 9,
            "maxItems": 9,
            "items": {
                "type": "number"
            }
        },
        "Matrix3x4": {
            "type": "array",
            "minItems": 12,
            "maxItems": 12,
            "items": {
                "type": "number"
            }
        },
        "Matrix4x4": {
            "type": "array",
            "minItems": 16,
            "maxItems": 16,
            "items": {
                "type": "number"
            }
        }
    }
}