{ "openapi": "3.1.1", "info": { "title": "Voxel Height Grid Builder API", "version": "1.0.0", "summary": "Build an editable voxel model from rows of integer heights.", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://renderloomvoxelheightgrid.usefulweb.site" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Build an editable voxel model from rows of integer heights.", "description": "Turn a rectangular grid of integer heights into a colored voxel model. Download a transparent isometric SVG, an OBJ/MTL mesh, a single-model VOX file, and an editable project for Renderloom Voxel Desk.\n\nMethodology:\n- Each cell specifies the number of voxels in a solid vertical column. Zero leaves a column empty. Values must be integers from 0 to 64; rows must have equal widths.\n- The highest voxel in each nonempty column uses the top color and all lower voxels use the base color.\n- A voxel occupies one integer grid cell; X and Y span each row and Z is the vertical axis. The preview is a transparent orthographic isometric illustration with fixed face shading.\n- The model supports dimensions of 1–64 cells per axis, up to 32,768 occupied cells and up to 64 opaque palette colors.\n- The VOX export is a single-model VOX 150 file with opaque palette colors. The OBJ mesh contains outward-facing quads only where a voxel has no occupied neighbor. It uses palette-based MTL diffuse colors; it does not include textures, animation or physically based material properties.\n\nThis creates solid vertical columns from the grid. The preview uses fixed illustration shading; it is not a physically based render.", "tags": [ "apps" ], "x-mcp-tool": "renderloom_voxel_height_grid", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/RenderloomVoxelHeightGridInput" }, "examples": { "example1": { "summary": "A small stepped hill", "value": {} }, "example2": { "summary": "A terraced platform", "value": { "grid": "1, 1, 1, 1\n1, 3, 3, 1\n1, 3, 3, 1\n1, 1, 1, 1", "base": "#687886", "top": "#eed5a3" } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/RenderloomVoxelHeightGridResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "RenderloomVoxelHeightGridInput": { "type": "object", "additionalProperties": false, "properties": { "grid": { "title": "Height grid (0–64; one row per line)", "type": "string", "maxLength": 16000, "default": "0, 1, 2, 1, 0\n1, 2, 3, 2, 1\n2, 3, 4, 3, 2\n1, 2, 3, 2, 1\n0, 1, 2, 1, 0" }, "base": { "title": "Base color (#rrggbb)", "type": "string", "maxLength": 7, "default": "#8b5e3c" }, "top": { "title": "Top color (#rrggbb)", "type": "string", "maxLength": 7, "default": "#7ba85c" } }, "required": [] }, "RenderloomVoxelHeightGridResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "project", "report", "preview", "mesh", "projectFile", "openInApp" ], "properties": { "project": { "type": "object", "additionalProperties": false, "required": [ "format", "version", "name", "width", "height", "depth", "palette", "voxels" ], "properties": { "format": { "const": "renderloom-voxel" }, "version": { "const": 1 }, "name": { "type": "string", "maxLength": 120 }, "width": { "type": "integer", "minimum": 1, "maximum": 64 }, "height": { "type": "integer", "minimum": 1, "maximum": 64 }, "depth": { "type": "integer", "minimum": 1, "maximum": 64 }, "palette": { "type": "array", "minItems": 1, "maxItems": 64, "items": { "type": "string", "pattern": "^#[0-9a-fA-F]{6}$" } }, "voxels": { "type": "array", "maxItems": 32768, "items": { "type": "object", "additionalProperties": false, "required": [ "x", "y", "z", "color" ], "properties": { "x": { "type": "integer", "minimum": 0, "maximum": 63 }, "y": { "type": "integer", "minimum": 0, "maximum": 63 }, "z": { "type": "integer", "minimum": 0, "maximum": 63 }, "color": { "type": "integer", "minimum": 0, "maximum": 63 } } } } } }, "report": { "type": "object", "additionalProperties": false, "required": [ "width", "height", "depth", "voxels", "surfaceFaces", "usedColors", "paletteColors" ], "properties": { "width": { "type": "integer" }, "height": { "type": "integer" }, "depth": { "type": "integer" }, "voxels": { "type": "integer" }, "surfaceFaces": { "type": "integer" }, "usedColors": { "type": "integer" }, "paletteColors": { "type": "integer" } } }, "preview": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "mesh": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "projectFile": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "openInApp": { "type": [ "string", "null" ] } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }