public static unsafe void TestRasterize()
{
Rasterizer.StartRasterize(CRenderSettings.ResolutionF);
RenderBuffer <float> tex0 = new RenderBuffer <float>(CRenderSettings.Resolution, 3);
CharRenderBuffer <float> texChar = new CharRenderBuffer <float>(tex0);
Vector2 *points = stackalloc Vector2[4];
for (float i = 0; i < JMath.PI_TWO; i += .02f)
{
Vector2 dir = new Vector2(MathF.Cos(i) * .3f, MathF.Sin(i) * .3f);
Vector2 orthoDir = new Vector2(-dir.Y, dir.X);
points[0] = new Vector2(.5f, .5f) + dir;
points[1] = new Vector2(.5f, .5f) - dir;
points[2] = new Vector2(.5f, .5f) + orthoDir;
points[3] = new Vector2(.5f, .5f) - orthoDir;
LinePrimitive *line = stackalloc LinePrimitive[1] {
new LinePrimitive(points, null, 0)
};
Rasterizer.Rasterize <Line, LinePrimitive>(line);
tex0.WritePixel(Rasterizer.ContriveResult(), new GenericVector <float>(3)
{
1f, 1f, 1f
});
CRenderer.Render(texChar);
tex0.Clear();
Thread.Sleep(16);
}
Rasterizer.EndRasterize();
}
public static unsafe void TestRasterizerLine()
{
Vector2 *coords = stackalloc Vector2[2] {
Vector2.Zero, Vector2.One
};
Rasterizer.StartRasterize(new Vector2(100, 100));
LinePrimitive *line = stackalloc LinePrimitive[1] {
new LinePrimitive(coords, null, 0)
};
Rasterizer.Rasterize <Line, LinePrimitive>(line);
var resultArr = Rasterizer.ContriveResult();
Assert.AreEqual(resultArr.Length, 100, 1);
Rasterizer.EndRasterize();
}
}
public void Rasterize(LinePrimitive *linePtr)
{
Vector2 *verticesPtr = linePtr->CoordsPtr;
float ** verticesDataPtr = linePtr->VerticesDataPtr;
int verticesDataCount = linePtr->VerticesDataCount;
Vector2 from = verticesPtr[0] * Resolution, to = verticesPtr[1] * Resolution;
float xSub = to.X - from.X,
ySub = to.Y - from.Y;
//0: X-major 1:Y-major
int dir;
int dirStep, otherDirStep;
float slopeAbs;
if (Math.Abs(xSub) >= Math.Abs(ySub))
{
dir = 0;
}
else
{
dir = 1;
float temp = xSub;
xSub = ySub;
ySub = temp;
}
dirStep = Math.Sign(xSub);
otherDirStep = Math.Sign(ySub);
slopeAbs = Math.Abs(ySub / xSub);
bool ifInterpolate = verticesDataCount > 0;
if (ifInterpolate)
{
LineInterpolator.SetInterpolation(verticesDataPtr[0], verticesDataPtr[1], verticesDataCount, Math.Abs(xSub));
}
Vector2Int resultPoint = new Vector2Int(JMath.RoundToInt(from.X), JMath.RoundToInt(from.Y));
if (resultPoint.X == Resolution.X)
{
resultPoint.X--;
}
if (resultPoint.Y == Resolution.Y)
{
resultPoint.Y--;
}
//End coordinate in Int
int end = JMath.RoundToInt(to[dir]);
for (float otherDirFrac = slopeAbs; resultPoint[dir] != end; otherDirFrac += slopeAbs, resultPoint[dir] += dirStep)
{
if (ifInterpolate)
{
RasterizerEntry.OutputRasterization(resultPoint, LineInterpolator.InterpolatedValues);
LineInterpolator.IncrementStep();
}
else
{
RasterizerEntry.OutputRasterization(resultPoint, LineInterpolator.InterpolatedValues);
}
if (otherDirFrac >= 1f)
{
resultPoint[1 - dir] += otherDirStep;
otherDirFrac--;
}
}
}
