private static int ColourPixels(ref Color[] cols, IBrush brush, Vector2[] triangleUVs, Vector3[] triangleVerts, Transform modelTransform, Rect uvRect, Rect bigUVRect, int texWidth, int texHeight)
{
int pixels = 0;
int xOffset = Mathf.FloorToInt((uvRect.xMin - bigUVRect.xMin) * texWidth);
int yOffset = Mathf.FloorToInt((uvRect.yMin - bigUVRect.yMin) * texHeight);
int width = Mathf.FloorToInt(uvRect.width * texWidth);
int height = Mathf.FloorToInt(uvRect.height * texHeight);
int colsStride = Mathf.FloorToInt(bigUVRect.width * texWidth);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
int i = (y + yOffset) * colsStride + x + xOffset;
Vector2 texPos = new Vector2(uvRect.xMin + (float)x / texWidth, uvRect.yMin + (float)y / texHeight);
Vector3 bary = GetBarycentricCoordFromUV(texPos, triangleUVs, triangleVerts);
float baryMag = bary.magnitude;
float min = -0.1f, max = 1.1f, maxMag = 1.1f;
if (!(bary.x < min || bary.y < min || bary.z < min || bary.x > max || bary.y > max || bary.z > max || baryMag > maxMag))
{
Vector3 modelPosOfUV = bary.x * triangleVerts[0] + bary.y * triangleVerts[1] + bary.z * triangleVerts[2];
Vector3 worldPosOfUV = modelTransform.TransformPoint(modelPosOfUV);
if (brush.IsInsideBrushStroke(worldPosOfUV))
{
cols[i] = brush.Colour;
pixels++;
}
}
}
}
return(pixels);
}