public void SetBackgroundColor(Pixel backColor)
{
this.BackgroundColor = new Color4(backColor.r, backColor.g, backColor.b, backColor.a);
}
// Draws a line from (x1,y1) to (x2,y2)
public void DrawLine(int x1, int y1, int x2, int y2, Pixel p, uint pattern = 0xFFFFFFFF)
{
if (p == default(Pixel))
{
p = Pixel.WHITE;
}
int x, y, dx, dy, dx1, dy1, px, py, xe, ye, i;
dx = x2 - x1; dy = y2 - y1;
Func <uint, uint> rol = (pat) =>
{
pat = (pat << 1) | (pat >> 31);
return(pat);
};
// straight lines idea by gurkanctn
if (dx == 0) // Line is vertical
{
if (y2 < y1)
{
swap(ref y1, ref y2);
}
for (y = y1; y <= y2; y++)
{
pattern = rol(pattern);
if ((pattern & 1) == 1)
{
Draw((uint)x1, (uint)y, p);
}
}
return;
}
if (dy == 0) // Line is horizontal
{
if (x2 < x1)
{
swap(ref x1, ref x2);
}
for (x = x1; x <= x2; x++)
{
pattern = rol(pattern);
if ((pattern & 1) == 1)
{
Draw((uint)x, (uint)y1, p);
}
}
return;
}
// Line is Funk-aye
dx1 = Math.Abs(dx);
dy1 = Math.Abs(dy);
px = 2 * dy1 - dx1;
py = 2 * dx1 - dy1;
if (dy1 <= dx1)
{
if (dx >= 0)
{
x = x1; y = y1; xe = x2;
}
else
{
x = x2; y = y2; xe = x1;
}
pattern = rol(pattern);
if ((pattern & 1) == 1)
{
Draw((uint)x, (uint)y, p);
}
for (i = 0; x < xe; i++)
{
x = x + 1;
if (px < 0)
{
px = px + 2 * dy1;
}
else
{
if ((dx < 0 && dy < 0) || (dx > 0 && dy > 0))
{
y = y + 1;
}
else
{
y = y - 1;
}
px = px + 2 * (dy1 - dx1);
}
pattern = rol(pattern);
if ((pattern & 1) == 1)
{
Draw((uint)x, (uint)y, p);
}
}
}
else
{
if (dy >= 0)
{
x = x1; y = y1; ye = y2;
}
else
{
x = x2; y = y2; ye = y1;
}
pattern = rol(pattern);
if ((pattern & 1) == 1)
{
Draw((uint)x, (uint)y, p);
}
for (i = 0; y < ye; i++)
{
y = y + 1;
if (py <= 0)
{
py = py + 2 * dx1;
}
else
{
if ((dx < 0 && dy < 0) || (dx > 0 && dy > 0))
{
x = x + 1;
}
else
{
x = x - 1;
}
py = py + 2 * (dx1 - dy1);
}
pattern = rol(pattern);
if ((pattern & 1) == 1)
{
Draw((uint)x, (uint)y, p);
}
}
}
}
// Draws a single line of text
public void DrawString(int x, int y, string sText, Pixel col, uint scale = 1)
{
if (col == default(Pixel))
{
col = Pixel.WHITE;
}
int sx = 0;
int sy = 0;
BlendMode m = this.PixelBlendMode;
if (col.a != 255)
{
this.PixelBlendMode = BlendMode.ALPHA;
}
else
{
this.PixelBlendMode = BlendMode.MASK;
}
foreach (var c in sText)
{
if (c == '\n')
{
sx = 0;
sy += (int)(8 * scale);
}
else
{
int ox = (c - 32) % 16;
int oy = (c - 32) / 16;
if (scale > 1)
{
for (uint i = 0; i < 8; i++)
{
for (uint j = 0; j < 8; j++)
{
if (fontSprite.GetPixel((uint)(i + ox * 8), (uint)(j + oy * 8)).r > 0)
{
for (uint is_ = 0; is_ < scale; is_++)
{
for (uint js = 0; js < scale; js++)
{
Draw((uint)(x + sx + (i * scale) + is_), (uint)(y + sy + (j * scale) + js), col);
}
}
}
}
}
}
else
{
for (uint i = 0; i < 8; i++)
{
for (uint j = 0; j < 8; j++)
{
if (fontSprite.GetPixel((uint)(i + ox * 8), (uint)(j + oy * 8)).r > 0)
{
Draw((uint)(x + sx + i), (uint)(y + sy + j), col);
}
}
}
}
sx += (int)(8 * scale);
}
}
this.PixelBlendMode = m;
}
public Triangle()
{
this.p = new vec3d[3];
this.t = new vec2d[3];
this.col = new Pixel();
}