io.github.mianalysis.mia.process.voxel.BresenhamRectangle Maven / Gradle / Ivy
package io.github.mianalysis.mia.process.voxel;
public class BresenhamRectangle {
public static int[][] getRectangle(int width, int length, int thetaDegs) {
double thetaRads = Math.toRadians((double) thetaDegs);
int x1 = (int) Math.round((-length / 2) * Math.cos(thetaRads) - (width / 2) * Math.sin(thetaRads));
int y1 = (int) Math.round((width / 2) * Math.cos(thetaRads) - (length / 2) * Math.sin(thetaRads));
int x2 = (int) Math.round((length / 2) * Math.cos(thetaRads) - (width / 2) * Math.sin(thetaRads));
int y2 = (int) Math.round((width / 2) * Math.cos(thetaRads) + (length / 2) * Math.sin(thetaRads));
int x3 = -x1;
int y3 = -y1;
int x4 = -x2;
int y4 = -y2;
int[][] line1 = BresenhamLine.getLine(x1, x2, y1, y2);
int[][] line2 = BresenhamLine.getLine(x2, x3, y2, y3);
int[][] line3 = BresenhamLine.getLine(x3, x4, y3, y4);
int[][] line4 = BresenhamLine.getLine(x4, x1, y4, y1);
int nCoords = line1.length + line2.length + line3.length + line4.length;
int[][] rect = new int[nCoords][2];
addCoords(rect, line1, 0);
addCoords(rect, line2, line1.length);
addCoords(rect, line3, line1.length + line2.length);
addCoords(rect, line4, line1.length + line2.length + line3.length);
return rect;
}
static void addCoords(int[][] output, int[][] input, int offset) {
for (int i = 0; i < input.length; i++) {
output[i + offset][0] = input[i][0];
output[i + offset][1] = input[i][1];
}
}
}