// This crops a polygon with a plane and keeps only a certain part of the polygon
protected void CropPoly(ref WallPolygon poly, Plane p, bool keepfront)
{
const float NEAR_ZERO = 0.01f;
float sideswitch = keepfront ? 1 : -1;
WallPolygon newp = new WallPolygon(poly.Count);
poly.CopyProperties(newp);
if (poly.Count > 0)
{
// First split lines that cross the plane so that we have vertices on the plane where the lines cross
Vector3D v1 = poly[poly.Count - 1];
float side1 = p.Distance(v1) * sideswitch;
for (int i = 0; i < poly.Count; i++)
{
// Fetch vertex and determine side
Vector3D v2 = poly[i];
float side2 = p.Distance(v2) * sideswitch;
// Front?
if (side2 > NEAR_ZERO)
{
if (side1 < -NEAR_ZERO)
{
// Split line with plane and insert the vertex
float u = 0.0f;
p.GetIntersection(v1, v2, ref u);
Vector3D v3 = v1 + (v2 - v1) * u;
newp.Add(v3);
}
newp.Add(v2);
}
// Back?
else if (side2 < -NEAR_ZERO)
{
if (side1 > NEAR_ZERO)
{
// Split line with plane and insert the vertex
float u = 0.0f;
p.GetIntersection(v1, v2, ref u);
Vector3D v3 = v1 + (v2 - v1) * u;
newp.Add(v3);
}
}
else
{
// On the plane
newp.Add(v2);
}
// Next
v1 = v2;
side1 = side2;
}
}
poly = newp;
}
public bool Setup(Effect3DFloor extrafloor)
{
Vector2D vl, vr;
Sidedef sourceside = extrafloor.Linedef.Front;
this.extrafloor = extrafloor;
int lightvalue = Sidedef.Fields.GetValue("light", 0);
bool lightabsolute = Sidedef.Fields.GetValue("lightabsolute", false);
Vector2D tscale = new Vector2D(sourceside.Fields.GetValue("scalex_mid", 1.0f),
sourceside.Fields.GetValue("scaley_mid", 1.0f));
Vector2D toffset1 = new Vector2D(Sidedef.Fields.GetValue("offsetx_mid", 0.0f),
Sidedef.Fields.GetValue("offsety_mid", 0.0f));
Vector2D toffset2 = new Vector2D(sourceside.Fields.GetValue("offsetx_mid", 0.0f),
sourceside.Fields.GetValue("offsety_mid", 0.0f));
// Left and right vertices for this sidedef
if (Sidedef.IsFront)
{
vl = new Vector2D(Sidedef.Line.Start.Position.x, Sidedef.Line.Start.Position.y);
vr = new Vector2D(Sidedef.Line.End.Position.x, Sidedef.Line.End.Position.y);
}
else
{
vl = new Vector2D(Sidedef.Line.End.Position.x, Sidedef.Line.End.Position.y);
vr = new Vector2D(Sidedef.Line.Start.Position.x, Sidedef.Line.Start.Position.y);
}
// Load sector data
SectorData sd = mode.GetSectorData(Sidedef.Sector);
// Texture given?
if ((sourceside.MiddleTexture.Length > 0) && (sourceside.MiddleTexture[0] != '-'))
{
// Load texture
base.Texture = General.Map.Data.GetTextureImage(sourceside.LongMiddleTexture);
if (base.Texture == null)
{
base.Texture = General.Map.Data.MissingTexture3D;
setuponloadedtexture = sourceside.LongMiddleTexture;
}
else
{
if (!base.Texture.IsImageLoaded)
{
setuponloadedtexture = sourceside.LongMiddleTexture;
}
}
}
else
{
// Use missing texture
base.Texture = General.Map.Data.MissingTexture3D;
setuponloadedtexture = 0;
}
// Get texture scaled size
Vector2D tsz = new Vector2D(base.Texture.ScaledWidth, base.Texture.ScaledHeight);
tsz = tsz / tscale;
// Get texture offsets
Vector2D tof = new Vector2D(Sidedef.OffsetX, Sidedef.OffsetY);
tof = tof + toffset1 + toffset2;
tof = tof / tscale;
if (General.Map.Config.ScaledTextureOffsets && !base.Texture.WorldPanning)
{
tof = tof * base.Texture.Scale;
}
// For Vavoom type 3D floors the ceiling is lower than floor and they are reversed.
// We choose here.
float sourcetopheight = extrafloor.VavoomType ? sourceside.Sector.FloorHeight : sourceside.Sector.CeilHeight;
float sourcebottomheight = extrafloor.VavoomType ? sourceside.Sector.CeilHeight : sourceside.Sector.FloorHeight;
// Determine texture coordinates plane as they would be in normal circumstances.
// We can then use this plane to find any texture coordinate we need.
// The logic here is the same as in the original VisualMiddleSingle (except that
// the values are stored in a TexturePlane)
// NOTE: I use a small bias for the floor height, because if the difference in
// height is 0 then the TexturePlane doesn't work!
TexturePlane tp = new TexturePlane();
float floorbias = (sourcetopheight == sourcebottomheight) ? 1.0f : 0.0f;
tp.trb.x = tp.tlt.x + Sidedef.Line.Length;
tp.trb.y = tp.tlt.y + (sourcetopheight - sourcebottomheight) + floorbias;
// Apply texture offset
tp.tlt += tof;
tp.trb += tof;
// Transform pixel coordinates to texture coordinates
tp.tlt /= tsz;
tp.trb /= tsz;
// Left top and right bottom of the geometry that
tp.vlt = new Vector3D(vl.x, vl.y, sourcetopheight);
tp.vrb = new Vector3D(vr.x, vr.y, sourcebottomheight + floorbias);
// Make the right-top coordinates
tp.trt = new Vector2D(tp.trb.x, tp.tlt.y);
tp.vrt = new Vector3D(tp.vrb.x, tp.vrb.y, tp.vlt.z);
// Get ceiling and floor heights
float fl = sd.Floor.plane.GetZ(vl);
float fr = sd.Floor.plane.GetZ(vr);
float cl = sd.Ceiling.plane.GetZ(vl);
float cr = sd.Ceiling.plane.GetZ(vr);
// Anything to see?
if (((cl - fl) > 0.01f) || ((cr - fr) > 0.01f))
{
// Keep top and bottom planes for intersection testing
top = extrafloor.Floor.plane;
bottom = extrafloor.Ceiling.plane;
// Create initial polygon, which is just a quad between floor and ceiling
WallPolygon poly = new WallPolygon();
poly.Add(new Vector3D(vl.x, vl.y, fl));
poly.Add(new Vector3D(vl.x, vl.y, cl));
poly.Add(new Vector3D(vr.x, vr.y, cr));
poly.Add(new Vector3D(vr.x, vr.y, fr));
// Determine initial color
int lightlevel = lightabsolute ? lightvalue : sd.Ceiling.brightnessbelow + lightvalue;
PixelColor wallbrightness = PixelColor.FromInt(mode.CalculateBrightness(lightlevel));
PixelColor wallcolor = PixelColor.Modulate(sd.Ceiling.colorbelow, wallbrightness);
poly.color = wallcolor.WithAlpha(255).ToInt();
// Cut off the part above the 3D floor and below the 3D ceiling
CropPoly(ref poly, extrafloor.Floor.plane, false);
CropPoly(ref poly, extrafloor.Ceiling.plane, false);
// Cut out pieces that overlap 3D floors in this sector
List <WallPolygon> polygons = new List <WallPolygon>(1);
polygons.Add(poly);
foreach (Effect3DFloor ef in sd.ExtraFloors)
{
// Same 3D floor and other floors that are not translucent will clip my walls
if ((ef.Alpha == 255) || (ef.Linedef.Front.Sector == extrafloor.Linedef.Front.Sector))
{
int num = polygons.Count;
for (int pi = 0; pi < num; pi++)
{
// Split by floor plane of 3D floor
WallPolygon p = polygons[pi];
WallPolygon np = SplitPoly(ref p, ef.Ceiling.plane, true);
if (np.Count > 0)
{
// Split part below floor by the ceiling plane of 3D floor
// and keep only the part below the ceiling (front)
SplitPoly(ref np, ef.Floor.plane, true);
if (p.Count == 0)
{
polygons[pi] = np;
}
else
{
polygons[pi] = p;
polygons.Add(np);
}
}
else
{
polygons[pi] = p;
}
}
}
}
// Process the polygon and create vertices
List <WorldVertex> verts = CreatePolygonVertices(polygons, tp, sd, lightvalue, lightabsolute);
if (verts.Count > 0)
{
if (extrafloor.Alpha < 255)
{
// Apply alpha to vertices
byte alpha = (byte)General.Clamp(extrafloor.Alpha, 0, 255);
if (alpha < 255)
{
for (int i = 0; i < verts.Count; i++)
{
WorldVertex v = verts[i];
PixelColor c = PixelColor.FromInt(v.c);
v.c = c.WithAlpha(alpha).ToInt();
verts[i] = v;
}
}
this.RenderPass = RenderPass.Alpha;
}
else
{
this.RenderPass = RenderPass.Mask;
}
base.SetVertices(verts);
return(true);
}
}
return(false);
}
// This builds the geometry. Returns false when no geometry created.
public override bool Setup()
{
Vector2D vl, vr;
int lightvalue = Sidedef.Fields.GetValue("light", 0);
bool lightabsolute = Sidedef.Fields.GetValue("lightabsolute", false);
Vector2D tscale = new Vector2D(Sidedef.Fields.GetValue("scalex_mid", 1.0f),
Sidedef.Fields.GetValue("scaley_mid", 1.0f));
Vector2D toffset = new Vector2D(Sidedef.Fields.GetValue("offsetx_mid", 0.0f),
Sidedef.Fields.GetValue("offsety_mid", 0.0f));
// Texture given?
if ((Sidedef.MiddleTexture.Length > 0) && (Sidedef.MiddleTexture[0] != '-'))
{
// Left and right vertices for this sidedef
if (Sidedef.IsFront)
{
vl = new Vector2D(Sidedef.Line.Start.Position.x, Sidedef.Line.Start.Position.y);
vr = new Vector2D(Sidedef.Line.End.Position.x, Sidedef.Line.End.Position.y);
}
else
{
vl = new Vector2D(Sidedef.Line.End.Position.x, Sidedef.Line.End.Position.y);
vr = new Vector2D(Sidedef.Line.Start.Position.x, Sidedef.Line.Start.Position.y);
}
// Load sector data
SectorData sd = mode.GetSectorData(Sidedef.Sector);
SectorData osd = mode.GetSectorData(Sidedef.Other.Sector);
if (!osd.Updated)
{
osd.Update();
}
// Texture given?
if ((Sidedef.MiddleTexture.Length > 0) && (Sidedef.MiddleTexture[0] != '-'))
{
// Load texture
base.Texture = General.Map.Data.GetTextureImage(Sidedef.LongMiddleTexture);
if (base.Texture == null)
{
base.Texture = General.Map.Data.MissingTexture3D;
setuponloadedtexture = Sidedef.LongMiddleTexture;
}
else
{
if (!base.Texture.IsImageLoaded)
{
setuponloadedtexture = Sidedef.LongMiddleTexture;
}
}
}
else
{
// Use missing texture
base.Texture = General.Map.Data.MissingTexture3D;
setuponloadedtexture = 0;
}
// Get texture scaled size
Vector2D tsz = new Vector2D(base.Texture.ScaledWidth, base.Texture.ScaledHeight);
tsz = tsz / tscale;
// Get texture offsets
Vector2D tof = new Vector2D(Sidedef.OffsetX, Sidedef.OffsetY);
tof = tof + toffset;
tof = tof / tscale;
if (General.Map.Config.ScaledTextureOffsets && !base.Texture.WorldPanning)
{
tof = tof * base.Texture.Scale;
}
// Determine texture coordinates plane as they would be in normal circumstances.
// We can then use this plane to find any texture coordinate we need.
// The logic here is the same as in the original VisualMiddleSingle (except that
// the values are stored in a TexturePlane)
// NOTE: I use a small bias for the floor height, because if the difference in
// height is 0 then the TexturePlane doesn't work!
TexturePlane tp = new TexturePlane();
float floorbias = (Sidedef.Sector.CeilHeight == Sidedef.Sector.FloorHeight) ? 1.0f : 0.0f;
float geotop = (float)Math.Min(Sidedef.Sector.CeilHeight, Sidedef.Other.Sector.CeilHeight);
float geobottom = (float)Math.Max(Sidedef.Sector.FloorHeight, Sidedef.Other.Sector.FloorHeight);
if (Sidedef.Line.IsFlagSet(General.Map.Config.LowerUnpeggedFlag))
{
// When lower unpegged is set, the middle texture is bound to the bottom
tp.tlt.y = tsz.y - (float)(geotop - geobottom);
}
tp.trb.x = tp.tlt.x + Sidedef.Line.Length;
tp.trb.y = tp.tlt.y + ((float)Sidedef.Sector.CeilHeight - ((float)Sidedef.Sector.FloorHeight + floorbias));
// Apply texture offset
tp.tlt += tof;
tp.trb += tof;
// Transform pixel coordinates to texture coordinates
tp.tlt /= tsz;
tp.trb /= tsz;
// Left top and right bottom of the geometry that
tp.vlt = new Vector3D(vl.x, vl.y, (float)Sidedef.Sector.CeilHeight);
tp.vrb = new Vector3D(vr.x, vr.y, (float)Sidedef.Sector.FloorHeight + floorbias);
// Make the right-top coordinates
tp.trt = new Vector2D(tp.trb.x, tp.tlt.y);
tp.vrt = new Vector3D(tp.vrb.x, tp.vrb.y, tp.vlt.z);
// Keep top and bottom planes for intersection testing
top = sd.Ceiling.plane;
bottom = sd.Floor.plane;
// Create initial polygon, which is just a quad between floor and ceiling
WallPolygon poly = new WallPolygon();
poly.Add(new Vector3D(vl.x, vl.y, sd.Floor.plane.GetZ(vl)));
poly.Add(new Vector3D(vl.x, vl.y, sd.Ceiling.plane.GetZ(vl)));
poly.Add(new Vector3D(vr.x, vr.y, sd.Ceiling.plane.GetZ(vr)));
poly.Add(new Vector3D(vr.x, vr.y, sd.Floor.plane.GetZ(vr)));
// Determine initial color
int lightlevel = lightabsolute ? lightvalue : sd.Ceiling.brightnessbelow + lightvalue;
PixelColor wallbrightness = PixelColor.FromInt(mode.CalculateBrightness(lightlevel));
PixelColor wallcolor = PixelColor.Modulate(sd.Ceiling.colorbelow, wallbrightness);
poly.color = wallcolor.WithAlpha(255).ToInt();
// Cut off the part below the other floor and above the other ceiling
CropPoly(ref poly, osd.Ceiling.plane, true);
CropPoly(ref poly, osd.Floor.plane, true);
// Determine if we should repeat the middle texture
if (Sidedef.Fields.ContainsKey("wrapmidtex"))
{
repeatmidtex = Sidedef.Fields.GetValue("wrapmidtex", false);
}
else
{
repeatmidtex = Sidedef.Line.IsFlagSet("wrapmidtex");
}
if (!repeatmidtex)
{
// First determine the visible portion of the texture
float textop, texbottom;
// Determine top portion height
if (Sidedef.Line.IsFlagSet(General.Map.Config.LowerUnpeggedFlag))
{
textop = geobottom + tof.y + tsz.y;
}
else
{
textop = geotop + tof.y;
}
// Calculate bottom portion height
texbottom = textop - tsz.y;
// Create crop planes (we also need these for intersection testing)
topclipplane = new Plane(new Vector3D(0, 0, -1), textop);
bottomclipplane = new Plane(new Vector3D(0, 0, 1), -texbottom);
// Crop polygon by these heights
CropPoly(ref poly, topclipplane, true);
CropPoly(ref poly, bottomclipplane, true);
}
if (poly.Count > 2)
{
// Keep top and bottom planes for intersection testing
top = osd.Ceiling.plane;
bottom = osd.Floor.plane;
// Process the polygon and create vertices
List <WorldVertex> verts = CreatePolygonVertices(poly, tp, sd, lightvalue, lightabsolute);
if (verts.Count > 0)
{
// Apply alpha to vertices
byte alpha = SetLinedefRenderstyle(true);
if (alpha < 255)
{
for (int i = 0; i < verts.Count; i++)
{
WorldVertex v = verts[i];
PixelColor c = PixelColor.FromInt(v.c);
v.c = c.WithAlpha(alpha).ToInt();
verts[i] = v;
}
}
base.SetVertices(verts);
return(true);
}
}
}
return(false);
}
// This splits a polygon with a plane and returns the other part as a new polygon
// The polygon is expected to be convex and clockwise
protected WallPolygon SplitPoly(ref WallPolygon poly, Plane p, bool keepfront)
{
const float NEAR_ZERO = 0.01f;
WallPolygon front = new WallPolygon(poly.Count);
WallPolygon back = new WallPolygon(poly.Count);
poly.CopyProperties(front);
poly.CopyProperties(back);
if (poly.Count > 0)
{
// Go for all vertices to see which side they have to be on
Vector3D v1 = poly[poly.Count - 1];
float side1 = p.Distance(v1);
for (int i = 0; i < poly.Count; i++)
{
// Fetch vertex and determine side
Vector3D v2 = poly[i];
float side2 = p.Distance(v2);
// Front?
if (side2 > NEAR_ZERO)
{
if (side1 < -NEAR_ZERO)
{
// Split line with plane and insert the vertex
float u = 0.0f;
p.GetIntersection(v1, v2, ref u);
Vector3D v3 = v1 + (v2 - v1) * u;
front.Add(v3);
back.Add(v3);
}
front.Add(v2);
}
// Back?
else if (side2 < -NEAR_ZERO)
{
if (side1 > NEAR_ZERO)
{
// Split line with plane and insert the vertex
float u = 0.0f;
p.GetIntersection(v1, v2, ref u);
Vector3D v3 = v1 + (v2 - v1) * u;
front.Add(v3);
back.Add(v3);
}
back.Add(v2);
}
else
{
// On the plane, add to both polygons
front.Add(v2);
back.Add(v2);
}
// Next
v1 = v2;
side1 = side2;
}
}
if (keepfront)
{
poly = front;
return(back);
}
else
{
poly = back;
return(front);
}
}
// This builds the geometry. Returns false when no geometry created.
public override bool Setup()
{
Vector2D vl, vr;
int lightvalue = Sidedef.Fields.GetValue("light", 0);
bool lightabsolute = Sidedef.Fields.GetValue("lightabsolute", false);
Vector2D tscale = new Vector2D(Sidedef.Fields.GetValue("scalex_mid", 1.0f),
Sidedef.Fields.GetValue("scaley_mid", 1.0f));
Vector2D toffset = new Vector2D(Sidedef.Fields.GetValue("offsetx_mid", 0.0f),
Sidedef.Fields.GetValue("offsety_mid", 0.0f));
// Left and right vertices for this sidedef
if (Sidedef.IsFront)
{
vl = new Vector2D(Sidedef.Line.Start.Position.x, Sidedef.Line.Start.Position.y);
vr = new Vector2D(Sidedef.Line.End.Position.x, Sidedef.Line.End.Position.y);
}
else
{
vl = new Vector2D(Sidedef.Line.End.Position.x, Sidedef.Line.End.Position.y);
vr = new Vector2D(Sidedef.Line.Start.Position.x, Sidedef.Line.Start.Position.y);
}
// Load sector data
SectorData sd = mode.GetSectorData(Sidedef.Sector);
// Texture given?
if ((Sidedef.MiddleTexture.Length > 0) && (Sidedef.MiddleTexture[0] != '-'))
{
// Load texture
base.Texture = General.Map.Data.GetTextureImage(Sidedef.LongMiddleTexture);
if (base.Texture == null)
{
base.Texture = General.Map.Data.MissingTexture3D;
setuponloadedtexture = Sidedef.LongMiddleTexture;
}
else
{
if (!base.Texture.IsImageLoaded)
{
setuponloadedtexture = Sidedef.LongMiddleTexture;
}
}
}
else
{
// Use missing texture
base.Texture = General.Map.Data.MissingTexture3D;
setuponloadedtexture = 0;
}
// Get texture scaled size
Vector2D tsz = new Vector2D(base.Texture.ScaledWidth, base.Texture.ScaledHeight);
tsz = tsz / tscale;
// Get texture offsets
Vector2D tof = new Vector2D(Sidedef.OffsetX, Sidedef.OffsetY);
tof = tof + toffset;
tof = tof / tscale;
if (General.Map.Config.ScaledTextureOffsets && !base.Texture.WorldPanning)
{
tof = tof * base.Texture.Scale;
}
// Determine texture coordinates plane as they would be in normal circumstances.
// We can then use this plane to find any texture coordinate we need.
// The logic here is the same as in the original VisualMiddleSingle (except that
// the values are stored in a TexturePlane)
// NOTE: I use a small bias for the floor height, because if the difference in
// height is 0 then the TexturePlane doesn't work!
TexturePlane tp = new TexturePlane();
float floorbias = (Sidedef.Sector.CeilHeight == Sidedef.Sector.FloorHeight) ? 1.0f : 0.0f;
if (Sidedef.Line.IsFlagSet(General.Map.Config.LowerUnpeggedFlag))
{
// When lower unpegged is set, the middle texture is bound to the bottom
tp.tlt.y = tsz.y - (float)(Sidedef.Sector.CeilHeight - Sidedef.Sector.FloorHeight);
}
tp.trb.x = tp.tlt.x + Sidedef.Line.Length;
tp.trb.y = tp.tlt.y + ((float)Sidedef.Sector.CeilHeight - ((float)Sidedef.Sector.FloorHeight + floorbias));
// Apply texture offset
tp.tlt += tof;
tp.trb += tof;
// Transform pixel coordinates to texture coordinates
tp.tlt /= tsz;
tp.trb /= tsz;
// Left top and right bottom of the geometry that
tp.vlt = new Vector3D(vl.x, vl.y, (float)Sidedef.Sector.CeilHeight);
tp.vrb = new Vector3D(vr.x, vr.y, (float)Sidedef.Sector.FloorHeight + floorbias);
// Make the right-top coordinates
tp.trt = new Vector2D(tp.trb.x, tp.tlt.y);
tp.vrt = new Vector3D(tp.vrb.x, tp.vrb.y, tp.vlt.z);
// Get ceiling and floor heights
float fl = sd.Floor.plane.GetZ(vl);
float fr = sd.Floor.plane.GetZ(vr);
float cl = sd.Ceiling.plane.GetZ(vl);
float cr = sd.Ceiling.plane.GetZ(vr);
// Anything to see?
if (((cl - fl) > 0.01f) || ((cr - fr) > 0.01f))
{
// Keep top and bottom planes for intersection testing
top = sd.Ceiling.plane;
bottom = sd.Floor.plane;
// Create initial polygon, which is just a quad between floor and ceiling
WallPolygon poly = new WallPolygon();
poly.Add(new Vector3D(vl.x, vl.y, fl));
poly.Add(new Vector3D(vl.x, vl.y, cl));
poly.Add(new Vector3D(vr.x, vr.y, cr));
poly.Add(new Vector3D(vr.x, vr.y, fr));
// Determine initial color
int lightlevel = lightabsolute ? lightvalue : sd.Ceiling.brightnessbelow + lightvalue;
PixelColor wallbrightness = PixelColor.FromInt(mode.CalculateBrightness(lightlevel));
PixelColor wallcolor = PixelColor.Modulate(sd.Ceiling.colorbelow, wallbrightness);
poly.color = wallcolor.WithAlpha(255).ToInt();
// Process the polygon and create vertices
List <WorldVertex> verts = CreatePolygonVertices(poly, tp, sd, lightvalue, lightabsolute);
if (verts.Count > 0)
{
base.SetVertices(verts);
return(true);
}
}
return(false);
}