public static Color GetColorBilinear(Color[] textureData, int width, int height, Vector2 uv)
{
Color color = Color.clear;
Vector2 pixelCoord = new Vector2(
Mathf.Lerp(0, width - 1, uv.x),
Mathf.Lerp(0, height - 1, uv.y));
//apply a bilinear filter
int xFloor = Mathf.FloorToInt(pixelCoord.x);
int xCeil = Mathf.CeilToInt(pixelCoord.x);
int yFloor = Mathf.FloorToInt(pixelCoord.y);
int yCeil = Mathf.CeilToInt(pixelCoord.y);
Color f00 = textureData[PUtilities.To1DIndex(xFloor, yFloor, width)];
Color f01 = textureData[PUtilities.To1DIndex(xFloor, yCeil, width)];
Color f10 = textureData[PUtilities.To1DIndex(xCeil, yFloor, width)];
Color f11 = textureData[PUtilities.To1DIndex(xCeil, yCeil, width)];
Vector2 unitCoord = new Vector2(
pixelCoord.x - xFloor,
pixelCoord.y - yFloor);
color =
f00 * (1 - unitCoord.x) * (1 - unitCoord.y) +
f01 * (1 - unitCoord.x) * unitCoord.y +
f10 * unitCoord.x * (1 - unitCoord.y) +
f11 * unitCoord.x * unitCoord.y;
return(color);
}
public static float GetValueBilinear(float[] data, int width, int height, Vector2 uv)
{
float value = 0;
Vector2 pixelCoord = new Vector2(
Mathf.Lerp(0, width - 1, uv.x),
Mathf.Lerp(0, height - 1, uv.y));
//apply a bilinear filter
int xFloor = Mathf.FloorToInt(pixelCoord.x);
int xCeil = Mathf.CeilToInt(pixelCoord.x);
int yFloor = Mathf.FloorToInt(pixelCoord.y);
int yCeil = Mathf.CeilToInt(pixelCoord.y);
float f00 = data[PUtilities.To1DIndex(xFloor, yFloor, width)];
float f01 = data[PUtilities.To1DIndex(xFloor, yCeil, width)];
float f10 = data[PUtilities.To1DIndex(xCeil, yFloor, width)];
float f11 = data[PUtilities.To1DIndex(xCeil, yCeil, width)];
Vector2 unitCoord = new Vector2(
pixelCoord.x - xFloor,
pixelCoord.y - yFloor);
value =
f00 * (1 - unitCoord.x) * (1 - unitCoord.y) +
f01 * (1 - unitCoord.x) * unitCoord.y +
f10 * unitCoord.x * (1 - unitCoord.y) +
f11 * unitCoord.x * unitCoord.y;
return(value);
}
public static Texture2D CreateTextureFromCurve(AnimationCurve curve, int width, int height)
{
Texture2D t = new Texture2D(width, height, TextureFormat.ARGB32, false);
t.wrapMode = TextureWrapMode.Clamp;
Color[] colors = new Color[width * height];
for (int x = 0; x < width; ++x)
{
float f = Mathf.InverseLerp(0, width - 1, x);
float value = curve.Evaluate(f);
Color c = new Color(value, value, value, value);
for (int y = 0; y < height; ++y)
{
colors[PUtilities.To1DIndex(x, y, width)] = c;
}
}
t.filterMode = FilterMode.Bilinear;
t.SetPixels(colors);
t.Apply();
return(t);
}
private void FillLine(int lineIndex, List <float> intersectX)
{
intersectX.Sort();
List <int> columnIndices = new List <int>();
for (int i = 0; i < intersectX.Count; ++i)
{
columnIndices.Add((int)(intersectX[i] * MASK_RESOLUTION));
}
int pairCount = columnIndices.Count / 2;
for (int p = 0; p < pairCount; ++p)
{
int c0 = columnIndices[p * 2 + 0];
int c1 = columnIndices[p * 2 + 1];
for (int c = c0; c <= c1; ++c)
{
mask[PUtilities.To1DIndex(c, lineIndex, MASK_RESOLUTION)] = 1.0f;
}
}
}
public static IEnumerable <Rect> CompareHeightMap(int gridSize, Color[] oldValues, Color[] newValues)
{
if (oldValues.LongLength != newValues.LongLength)
{
return(new Rect[1] {
new Rect(0, 0, 1, 1)
});
}
Rect[] rects = new Rect[gridSize * gridSize];
for (int x = 0; x < gridSize; ++x)
{
for (int z = 0; z < gridSize; ++z)
{
rects[PUtilities.To1DIndex(x, z, gridSize)] = GetUvRange(gridSize, x, z);
}
}
HashSet <Rect> dirtyRects = new HashSet <Rect>();
int index = 0;
int resolution = Mathf.RoundToInt(Mathf.Sqrt(newValues.LongLength));
for (int rectIndex = 0; rectIndex < rects.Length; ++rectIndex)
{
Rect r = rects[rectIndex];
int startX = (int)Mathf.Lerp(0, resolution - 1, r.min.x);
int startY = (int)Mathf.Lerp(0, resolution - 1, r.min.y);
int endX = (int)Mathf.Lerp(0, resolution - 1, r.max.x);
int endY = (int)Mathf.Lerp(0, resolution - 1, r.max.y);
for (int x = startX; x <= endX; ++x)
{
for (int y = startY; y <= endY; ++y)
{
index = PUtilities.To1DIndex(x, y, resolution);
if (oldValues[index].r == newValues[index].r &&
oldValues[index].g == newValues[index].g &&
oldValues[index].b == newValues[index].b &&
oldValues[index].a == newValues[index].a)
{
continue;
}
dirtyRects.Add(r);
Rect hRect = new Rect();
hRect.size = new Vector2(r.width * 1.2f, r.height);
hRect.center = r.center;
dirtyRects.Add(hRect);
Rect vRect = new Rect();
vRect.size = new Vector2(r.width, r.height * 1.2f);
vRect.center = r.center;
dirtyRects.Add(vRect);
break;
}
if (dirtyRects.Contains(r))
{
break;
}
}
}
return(dirtyRects);
}