public GpuImplSoft()
{
TriangleRasterizer = new TriangleRasterizer <Triangle>((int y, ref RasterizerResult a, ref RasterizerResult b, ref Triangle triangle) =>
{
//Console.WriteLine($"{a.Ratio} {b.Ratio} {triangle.P0.Color} : {triangle.P1.IColor}");
var P0 = triangle.P0;
var P1 = triangle.P1;
var P2 = triangle.P2;
var C0 = P0.Color;
var C1 = P1.Color;
var C2 = P2.Color;
//Console.WriteLine(triangle.P0.T);
if (VertexType.HasTexture)
{
var texA = LerpRatios(P0.T, P1.T, P2.T, a.Ratios);
var texB = LerpRatios(P0.T, P1.T, P2.T, b.Ratios);
//Console.WriteLine($"{P0.T} {P1.T} {P2.T} {a.Ratios} {b.Ratios} {texA} {texB}");
DrawRowFastTextureLookup(y, a.X, b.X, texA, texB);
}
else if (C0 == C1 && C0 == C2)
{
DrawRowFastSingleColor(y, a.X, b.X, triangle.P0.RgbaColor);
}
else
{
var colorA = LerpRatios(C0, C1, C2, a.Ratios).Clamp(0, 1);
var colorB = LerpRatios(C0, C1, C2, b.Ratios).Clamp(0, 1);
//Console.WriteLine($"{a.Ratio0}, {a.Ratio1}, {a.Ratio2}");
DrawRowFastInterpolateTwoColors(y, a.X, b.X, colorA, colorB);
}
}, 0, 271, 0, 511);
}
public void TestRasterization()
{
const int dimension = 192;
var buffer = new byte[dimension * dimension];
Span <Vector2> vertices = stackalloc Vector2[3]
{
new Vector2(5.5f, 10.2f),
new Vector2(5.5f + 16, 10.2f + 5.0f),
new Vector2(5.5f - 5, 10.2f + 5.0f)
};
TriangleRasterizer.Rasterize(dimension, dimension, buffer, vertices, 0xFF);
using var image = Image.LoadPixelData <L8>(buffer, dimension, dimension);
ImageComparison.AssertImagesEqual(image, "FogOfWar/tesselated_expected.png");
}
}
