public static int[] VectorLineToPixels(int canvasWidth, int canvasHeight, AdjancanyCondition adjacancy, params Vector2[] points) {
if (adjacancy != AdjancanyCondition.Line)
return VectorLineToPixelsViaSnaking (canvasWidth, canvasHeight, adjacancy, points);
List<int> pixels = new List<int>();
int currentPos = VectorToPosition(points[0], canvasWidth, canvasHeight);
pixels.Add(currentPos);
float stepSize = 0.5f;
for (int i = 1; i < points.Length; i++) {
Vector2 source = points [i - 1];
Vector2 target = points [i];
float lerpStep = 1f / (Vector2.Distance (source, target) / stepSize);
for (float t=0; t<=1f; t+=lerpStep) {
int nextPos = VectorToPosition (Vector2.Lerp (source, target, t), canvasWidth, canvasHeight);
if (nextPos != currentPos) {
pixels.Add (nextPos);
currentPos = nextPos;
}
}
}
return pixels.ToArray ();
}
static int[] VectorLineToPixelsViaSnaking(int canvasWidth, int canvasHeight, AdjancanyCondition adjacancy, params Vector2[] points) {
var offsets = GetOffsets (adjacancy, canvasWidth);
List<int> pixels = new List<int>();
int target;
int currentPos = VectorToPosition(points[0], canvasWidth, canvasHeight);
pixels.Add(currentPos);
int nextPos;
for (int i = 1; i < points.Length; i++) {
target = VectorToPosition(points [i], canvasWidth, canvasHeight);
while (CloserNeighbour(currentPos, target, offsets, canvasWidth, canvasHeight, out nextPos)) {
pixels.Add (nextPos);
currentPos = nextPos;
}
}
return pixels.ToArray ();
}
static int[] GetOffsets(AdjancanyCondition adjacancy, int canvasWidth) {
int[] offsets;
if (adjacancy == AdjancanyCondition.Compass)
offsets = new int[8];
else
offsets = new int[4];
offsets [0] = -1;
offsets [1] = 1;
offsets [2] = -canvasWidth;
offsets [3] = canvasWidth;
if (adjacancy == AdjancanyCondition.Compass) {
offsets [4] = -canvasWidth - 1;
offsets [5] = -canvasWidth + 1;
offsets [6] = canvasWidth + 1;
offsets [7] = canvasWidth - 1;
}
return offsets;
}
