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ThiefLightmapper
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Per lightmap pixel raycasting

This commit is contained in:
Jarrod Doyle 2024-09-22 20:47:57 +01:00
parent 6a9aac972d
commit f4c4237306
Signed by: Jayrude
GPG Key ID: 38B57B16E7C0ADF7
1 changed files with 32 additions and 16 deletions
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48
KeepersCompound.Lightmapper/Program.cs
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@ -185,7 +185,7 @@ class Program
var cells = wr.Cells;
for (var cellIdx = 0; cellIdx < cells.Length; cellIdx++)
{
Console.Write($"\rResetting cell lighting... {cellIdx + 1}/{cells.Length}");
Console.Write($"\rLighting cell... {cellIdx + 1}/{cells.Length}\n");
var cell = cells[cellIdx];
var numPolys = cell.PolyCount;
@ -200,6 +200,7 @@ class Program
}
var maxPolyIdx = Math.Min(numRenderPolys, numPolys - numPortalPolys);
var cellIdxOffset = 0;
for (int polyIdx = 0; polyIdx < maxPolyIdx; polyIdx++)
{
var poly = cell.Polys[polyIdx];
@ -210,36 +211,51 @@ class Program
ResetLightmap(ambientLight, lightmap);
// Get world position of lightmap (0, 0)
var baseU = (4.0f / info.Width) * (renderPoly.TextureBases.Item1 + (0.5f - info.Bases.Item1) * 0.25f);
var baseV = (4.0f / info.Height) * (renderPoly.TextureBases.Item2 + (0.5f - info.Bases.Item2) * 0.25f);
var topLeft = cell.Vertices[cell.Indices[cellIdxOffset]];
topLeft -= baseU * (info.Width * 0.25f) * renderPoly.TextureVectors.Item1;
topLeft -= baseV * (info.Height * 0.25f) * renderPoly.TextureVectors.Item2;
foreach (var light in lights)
{
// Check if plane normal is facing towards the light
var direction = renderPoly.Center - light.position;
if (Vector3.Dot(plane.Normal, direction) >= 0)
// If it's not then we're never going to be (directly) lit by this
// light.
var centerDirection = renderPoly.Center - light.position;
if (Vector3.Dot(plane.Normal, centerDirection) >= 0)
{
continue;
}
// Cast from the light to the center (later each pixel)
var hitResult = scene.Trace(new Ray
for (var y = 0; y < lightmap.Height; y++)
{
Origin = light.position,
Direction = Vector3.Normalize(direction)
});
// cheeky epsilon
var hit = hitResult && Math.Abs(hitResult.Distance - direction.Length()) < 0.001;
if (hit)
{
for (var y = 0; y < lightmap.Height; y++)
for (var x = 0; x < lightmap.Width; x++)
{
for (var x = 0; x < lightmap.Width; x++)
var pos = topLeft;
pos += x * 0.25f * renderPoly.TextureVectors.Item1;
pos += y * 0.25f * renderPoly.TextureVectors.Item2;
// Cast from the light to the center (later each pixel)
var direction = pos - light.position;
var hitResult = scene.Trace(new Ray
{
Origin = light.position,
Direction = Vector3.Normalize(direction),
});
// cheeky epsilon
var hit = hitResult && Math.Abs(hitResult.Distance - direction.Length()) < 0.001;
if (hit)
{
lightmap.AddLight(0, x, y, (byte)light.color.X, (byte)light.color.Y, (byte)light.color.Z);
}
}
}
}
cellIdxOffset += poly.VertexCount;
}
}