package main

import (
	log "github.com/sirupsen/logrus"
)

func getPart(pixelmatrix [][][4]uint32, partCount, partTotal, partBegin int) [][][4]uint32 {
	xLength := len(pixelmatrix)
	if xLength < partTotal {
		log.Fatal("more parts then rows not possible")
		return nil
	}
	partSize := (xLength / partTotal)

	// last part should return last rows
	if partBegin + partCount == partTotal {
		return pixelmatrix[ partBegin * partSize : ]
	}
	return pixelmatrix[ partBegin * partSize : (partBegin + partCount) * partSize]
}