/*
* . v0
* / \
* v1 /___\ v2
*
*/
void BlitUpperTriangle(Vector2 v0, Vector2 v1, Vector2 v2, Vector2 uv0, Vector2 uv1, Vector2 uv2, PlotDelegate plotDelegate)
{
if (v1.x > v2.x)
{
MUtils.Swap(ref v1, ref v2);
}
var L1 = new RasterizedLine(v1, v0);
var i1 = L1.CreatePixelIterator();
int y0 = int.MinValue;
int x0;
int x1;
float dx = v2.x - v0.x;
float dy = v0.y - v2.y;
Vector2 newUv0 = Vector2.zero;
Vector3 newUv1 = Vector2.zero;
if (dy != 0)
{
while (NextY(i1, y0, out x0, out y0))
{
x1 = Mathf.RoundToInt(v2.x - dx * (y0 - v2.y) / dy);
BlitHorizontalLine(x0, x1, y0, newUv0, newUv1, plotDelegate);
}
}
}
/*
* v0 ---- v1
\ /
\/
\ v2
*/
void BlitTriangle(Vector2 v0, Vector2 v1, Vector2 v2, Vector2 uv0, Vector2 uv1, Vector2 uv2, PlotDelegate plotDelegate)
{
if (v0.x > v1.x)
{
MUtils.Swap(ref v0, ref v1);
}
var L1 = new RasterizedLine(v0, v2);
var L2 = new RasterizedLine(v1, v2);
var i1 = L1.CreatePixelIterator();
var i2 = L2.CreatePixelIterator();
Vector2 newUv0 = Vector2.zero;
Vector3 newUv1 = Vector2.zero;
var pList1 = ArrayPool <RasterizedLine.Pixel> .Get();
var pList2 = ArrayPool <RasterizedLine.Pixel> .Get();
CacheYOnChanged(i1, pList1);
CacheYOnChanged(i2, pList2);
if (CheckSequence(pList1, pList2))
{
for (int i = 0; i < pList1.length; ++i)
{
var a = pList1[i];
var b = pList2[i];
BlitHorizontalLine(a.x, b.x, a.y, newUv0, newUv1, plotDelegate);
}
}
else
{
for (int i = 0; i < pList1.length; ++i)
{
var a = pList1[i];
var b = pList2[-i - 1];
BlitHorizontalLine(a.x, b.x, a.y, newUv0, newUv1, plotDelegate);
}
}
ArrayPool <RasterizedLine.Pixel> .Release(pList1);
ArrayPool <RasterizedLine.Pixel> .Release(pList2);
}