private void writeFaceWithOffsets()

in commons-geometry-io-euclidean/src/main/java/org/apache/commons/geometry/io/euclidean/threed/obj/ObjWriter.java [253:291]

31 lines of code
8 McCabe index (conditional complexity)


    private void writeFaceWithOffsets(final int vertexOffset, final int[] vertexIndices,
            final int normalOffset, final int[] normalIndices) {
        if (vertexIndices.length < EuclideanUtils.TRIANGLE_VERTEX_COUNT) {
            throw new IllegalArgumentException("Face must have more than " + EuclideanUtils.TRIANGLE_VERTEX_COUNT +
                    " vertices; found " + vertexIndices.length);
        } else if (normalIndices != null && normalIndices.length != vertexIndices.length) {
            throw new IllegalArgumentException("Face normal index count must equal vertex index count; expected " +
                    vertexIndices.length + " but was " + normalIndices.length);
        }

        write(ObjConstants.FACE_KEYWORD);

        int vertexIdx;
        int normalIdx;
        for (int i = 0; i < vertexIndices.length; ++i) {
            vertexIdx = vertexIndices[i] + vertexOffset;
            if (vertexIdx < 0 || vertexIdx >= vertexCount) {
                throw new IndexOutOfBoundsException("Vertex index out of bounds: " + vertexIdx);
            }

            write(SPACE);
            write(vertexIdx + 1); // convert to OBJ 1-based convention

            if (normalIndices != null) {
                normalIdx = normalIndices[i] + normalOffset;
                if (normalIdx < 0 || normalIdx >= normalCount) {
                    throw new IndexOutOfBoundsException("Normal index out of bounds: " + normalIdx);
                }

                // two separator chars since there is no texture coordinate
                write(ObjConstants.FACE_VERTEX_ATTRIBUTE_SEP_CHAR);
                write(ObjConstants.FACE_VERTEX_ATTRIBUTE_SEP_CHAR);

                write(normalIdx + 1); // convert to OBJ 1-based convention
            }
        }

        writeNewLine();
    }