Jump to content

Illnab1024

Members
 View Profile  See their activity

  • Posts

    1,178

  • Joined

  • Last visited

  • Days Won

    1

 Content Type 

Posts posted by Illnab1024

    PVC Texturing?

    in Paint.NET Discussion and Questions

    Posted

    The best way to achieve the effect is with material settings; reflectivity, specular settings, etc. If you're looking for high-res, I suggest adding a bit of noise and doing brightness/contrast, and for any hemming you might have, you're likely going to have to draw a good bit of it yourself.

    EDIT: If you can't do lighting settings, then draw some highlights n a new layer, blur the layer, and maybe lower the layer opacity a bit. Mess around, see what you can get.

    Masking plugin

    in Paint.NET Discussion and Questions

    Posted

    Hmm.... A prototype for codelab, right here (Really, dirty and hacky)

    int Amount1=120; //Base Hue green=120, blue=240, reds aren't supported very well
int Amount2=50; //Hue Tolerance
int Amount3=16; //Value tolerance

const double HSV_UNDEFINED = -999.0;

void Render(Surface dst, Surface src, Rectangle rect)
{
   float BaseHue = Amount1;
   float HueTol = Amount2;
   float VTol = (float)Amount3;
   double H = 0, S = 0, V = 0;
   VTol /= 100f;
   for(int y = rect.Top; y < rect.Bottom; y++)
   {

       for (int x = rect.Left; x < rect.Right; x++)
       {
           ColorBgra col = src[x, y];

           EvanRGBtoHSV(col.R, col.G, col.B, ref H, ref S, ref V);
           if (V > VTol) {
               if (H > (BaseHue-HueTol+3)&&H > (BaseHue+HueTol-3)||H < (BaseHue-HueTol+3)&&H < (BaseHue-HueTol-3)) col.A=255;
               else col.A = 0;
               }
           dst[x, y] = col;
           }

       }

   }

public void EvanRGBtoHSV(int R, int G, int B, ref double outH, ref double outS, ref double outV)
{
// R, G, and B must range from 0 to 255
// Ouput value ranges:
// outH - 0.0 to 360.0
// outS - 0.0 to 1.0
// outV - 0.0 to 1.0

double dR = (double)R/255.0;
double dG = (double)G/255.0;
double dB = (double)B/255.0;
double dmaxRGB = EvanMax3(dR, dG, dB);
double dminRGB = EvanMin3(dR, dG, dB);
double delta = dmaxRGB - dminRGB;

// Set value
outV = dmaxRGB;

// Handle special case
if (dmaxRGB == 0)
{
outH = HSV_UNDEFINED;
outS = 0.0;
return;
}

outS = delta/dmaxRGB;
if (dmaxRGB == dminRGB)
{
outH = HSV_UNDEFINED;
return;
}

// Finally, compute hue
if (dR == dmaxRGB)
{
outH = (dG-dB)/delta*60.0;
}
else if (dG == dmaxRGB)
{
outH = (2.0+(dB-dR)/delta)*60.0;
}
else //if (dB == dmaxRGB)
{
outH = (4.0+(dR-dG)/delta)*60.0;
}

if (outH < 0)
{
outH += 360.0;
}
}

public double EvanMax3(double x, double y, double z)
{
return (x>y)?((x>z)?x:z)(y>z)?y:z);
}
public double EvanMin3(double x, double y, double z)
{
return (x(y}

    Last 3 functions were made by EvanOlds, best to attribute him.

    Okay, here's an example for the wine glass.

    I took the white background to blue because white is the most difficult color to mask out.

    blueglass.png

    Now, Amount1 = 240, for blue. Amount2 = 40, for good hue range. Amount3 = 56, to catch some of the edges.

    After:

    transglass.png

    The blue is still visible, but it's a prototype. ;)

×
×
  • Create New...