private Tuple <DynamicVao, DynamicVao> TryBuildVaoForLight(Light light)
{
_hullVertices.Clear();
_shadowVertices.Clear();
_shadowIndices.Clear();
_hullIndices.Clear();
int numSegments = 0;
int shadowIndexOffset = 0;
int hullIndexOffset = 0;
int hullCount = _engine.Hulls.Count;
for (int i = 0; i < hullCount; i++)
{
Hull hull = _engine.Hulls[i];
if (!hull.Enabled ||
!hull.Valid ||
light.IgnoredHulls.Contains(hull) ||
!light.Intersects(hull))
{
continue;
}
Polygon points = hull.WorldPoints;
Vector2 prevPoint = points[points.Count - 1];
int pointCount = points.Count;
numSegments += pointCount;
for (int j = 0; j < pointCount; j++)
{
Vector2 currentPoint = points[j];
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(0.0f, 0.0f)));
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(1.0f, 0.0f)));
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(0.0f, 1.0f)));
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(1.0f, 1.0f)));
_shadowIndices.Add(shadowIndexOffset * 4 + 0);
_shadowIndices.Add(shadowIndexOffset * 4 + 1);
_shadowIndices.Add(shadowIndexOffset * 4 + 2);
_shadowIndices.Add(shadowIndexOffset * 4 + 1);
_shadowIndices.Add(shadowIndexOffset * 4 + 3);
_shadowIndices.Add(shadowIndexOffset * 4 + 2);
prevPoint = currentPoint;
shadowIndexOffset++;
}
_hullVertices.AddRange(hull.WorldPoints);
int indexCount = hull.Indices.Count;
for (int j = 0; j < indexCount; j++)
{
_hullIndices.Add(hull.Indices[j] + hullIndexOffset);
}
hullIndexOffset += pointCount;
}
if (numSegments == 0)
{
return(null);
}
Tuple <DynamicVao, DynamicVao> lightVaos;
if (!_lightsVaos.TryGetValue(light, out lightVaos))
{
lightVaos = Tuple.Create(
DynamicVao.New(_engine.Device, VertexShadow.Layout, PrimitiveType.TriangleList, _shadowVertices.Count, _shadowIndices.Count, useIndices: true),
DynamicVao.New(_engine.Device, VertexPosition2.Layout, PrimitiveType.TriangleList, _hullVertices.Count, _hullIndices.Count, useIndices: true));
_lightsVaos.Add(light, lightVaos);
}
lightVaos.Item1.SetVertices(_shadowVertices);
lightVaos.Item1.SetIndices(_shadowIndices);
lightVaos.Item2.SetVertices(_hullVertices);
lightVaos.Item2.SetIndices(_hullIndices);
return(lightVaos);
}
private void BuildVaosForLight(Light light, LightVaos lightVaos)
{
_hullVertices.Clear();
_shadowVertices.Clear();
_shadowIndices.Clear();
_hullIndices.Clear();
int numSegments = 0;
int shadowIndexOffset = 0;
int hullIndexOffset = 0;
int hullCount = _engine.Hulls.Count;
for (int i = 0; i < hullCount; i++)
{
Hull hull = _engine.Hulls[i];
if (!hull.Enabled ||
!hull.Valid ||
light.IgnoredHulls.Contains(hull) ||
!light.Intersects(hull))
{
continue;
}
Polygon points = hull.WorldPoints;
Vector2 prevPoint = points.Items[points.Count - 1];
int pointCount = points.Count;
numSegments += pointCount;
for (int j = 0; j < pointCount; j++)
{
Vector2 currentPoint = points.Items[j];
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(0.0f, 0.0f)));
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(1.0f, 0.0f)));
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(0.0f, 1.0f)));
_shadowVertices.Add(new VertexShadow(prevPoint, currentPoint, new Vector2(1.0f, 1.0f)));
_shadowIndices.Add(shadowIndexOffset * 4 + 0);
_shadowIndices.Add(shadowIndexOffset * 4 + 1);
_shadowIndices.Add(shadowIndexOffset * 4 + 2);
_shadowIndices.Add(shadowIndexOffset * 4 + 1);
_shadowIndices.Add(shadowIndexOffset * 4 + 3);
_shadowIndices.Add(shadowIndexOffset * 4 + 2);
prevPoint = currentPoint;
shadowIndexOffset++;
}
_hullVertices.AddRange(hull.WorldPoints);
int indexCount = hull.Indices.Count;
for (int j = 0; j < indexCount; j++)
{
_hullIndices.Add(hull.Indices.Items[j] + hullIndexOffset);
}
hullIndexOffset += pointCount;
}
lightVaos.Enabled = numSegments > 0;
if (!lightVaos.Enabled)
{
return;
}
if (lightVaos.ShadowVao == null)
{
lightVaos.ShadowVao = DynamicVao.New(
_engine.Device,
VertexShadow.Layout,
PrimitiveType.TriangleList,
_shadowVertices.Count,
_shadowIndices.Count,
useIndices: true);
lightVaos.HullVao = DynamicVao.New(
_engine.Device,
VertexPosition2.Layout,
PrimitiveType.TriangleList,
_hullVertices.Count,
_hullIndices.Count,
useIndices: true);
}
lightVaos.ShadowVao.SetVertices(_shadowVertices);
lightVaos.ShadowVao.SetIndices(_shadowIndices);
lightVaos.HullVao.SetVertices(_hullVertices);
lightVaos.HullVao.SetIndices(_hullIndices);
}