public static void FillRect(CGContext context, RectangleF rect, CGColor color)
{
context.SaveState();
context.AddRect(rect);
context.Clip();
context.SetFillColor(color);
context.FillRect(rect);
context.RestoreState();
}
void RenderPixels(CGContext context, int x, int y, Edge edge32, Edge edge13, Edge edge21, int w1, int w2, int w3)
{
//VertexInterpoliation = A * x + B * y + C;
// float alpha = (edge32.A * x + edge32.B * y + edge32.C) * edge32.VertexFactor;
// float beta = (edge13.A * x + edge13.B * y + edge13.C) * edge13.VertexFactor;
// float gamma = (edge21.A * x + edge21.B * y + edge21.C) * edge21.VertexFactor;
// Determine barycentric coordinates
float alpha = (float)(w1 * edge32.VertexFactor);
float beta = (float)(w2 * edge13.VertexFactor);
float gamma = (float)(w3 * edge21.VertexFactor);
GradientLerp3 (alpha, beta, gamma);
// Set the color
context.SetFillColor (colorOutput [0], colorOutput [1], colorOutput [2], colorOutput [3]);
// Set our pixel location
pixelRect.X = x;
pixelRect.Y = y;
// Fill the pixel
context.FillRect (pixelRect);
}
/**
* This is fill of hackish stuff.
* Thought this was going to be easier but that just did not work out.
**/
protected void HatchSphere(CGContext context)
{
var hatchSize = getHatchWidth (hatchStyle);
var lineWidth = getLineWidth (hatchStyle);
initializeContext(context, hatchSize, false);
/* draw background in fore ground color*/
drawBackground (context, backColor, hatchSize, hatchSize);
context.SetStrokeColor(foreColor.ToCGColor());
context.SetFillColor(foreColor.ToCGColor());
context.SetLineWidth(1);
context.SetLineCap(CGLineCap.Square);
// Initialize work rectangle
RectangleF rect = new RectangleF(0,0,1,1);
float quad = hatchSize / 2.0f;
// Left lower quad
rect.Width = quad;
rect.Height = quad;
rect.X = 0;
rect.Y = 0;
context.StrokeRect(rect);
// right upper quad
rect.Width = quad;
rect.Height = quad;
rect.X = quad;
rect.Y = quad;
context.StrokeRect(rect);
// left upper quad
rect.Width = quad;
rect.Height = quad;
rect.X = 0;
rect.Y = quad + 1;
context.FillRect(rect);
// right lower quod
rect.Width = quad;
rect.Height = quad;
rect.X = quad + 1;
rect.Y = 0;
context.FillRect(rect);
// Now we fill in some corner bits with background
// This is a bad hack but now sure what else to do
context.SetFillColor(backColor.ToCGColor());
rect.Height = 1;
rect.Width = 1;
rect.X = 0;
rect.Y = 0;
setPixels(context, rect);
rect.X = 0;
rect.Y = quad;
setPixels(context, rect);
rect.X = 0;
rect.Y = quad;
setPixels(context, rect);
rect.X = quad;
rect.Y = 0;
setPixels(context, rect);
rect.X = quad;
rect.Y = quad;
setPixels(context, rect);
rect.X = quad;
rect.Y = hatchSize;
setPixels(context, rect);
rect.X = hatchSize;
rect.Y = 0;
setPixels(context, rect);
rect.X = hatchSize;
rect.Y = quad;
setPixels(context, rect);
rect.X = hatchSize;
rect.Y = hatchSize;
setPixels(context, rect);
// Now for the fake shiny thingys hack
// Probably could use a line here but it is already
// so hacky I will just use this.
rect.X = 5;
rect.Y = 3;
setPixels(context, rect);
rect.X = 6;
rect.Y = 3;
setPixels(context, rect);
rect.X = 1;
rect.Y = 7;
setPixels(context, rect);
rect.X = 2;
rect.Y = 7;
setPixels(context, rect);
}
void drawBackground(CGContext context, Color color, float width, float height)
{
context.SetFillColor(color.ToCGColor());
context.FillRect(new RectangleF(HALF_PIXEL_X, HALF_PIXEL_Y, width+HALF_PIXEL_X, height+HALF_PIXEL_Y));
context.FillPath();
}
void setPixels(CGContext context, RectangleF rect)
{
context.FillRect(rect);
}
