protected void BuildEndCapCutNoHollow(bool top)
{
V3ToV3Xna XnaOMV = new V3ToV3Xna();
float z = top ? 0.5f : -0.5f;
for (int i = FirstOuterFace; i <= LastOuterFace; i++)
{
int pointCount = OuterFaces[i].GetNumPoints();
for (int j = 0; j < pointCount - 1; j++)
{
Vector3 first = XnaOMV.V3ToV3X(OuterFaces[i].GetRawVertex(j));
first.Z = z;
Vector3 second = XnaOMV.V3ToV3X(OuterFaces[i].GetRawVertex(j + 1));
second.Z = z;
Vector3 center = new Vector3(0, 0, z);
// TODO: Texturemapping stuff
//Vector2 t1 = texturemapping.GetTextureCoordinate(new Vector2(1 - (p1.x + 0.5), p1.y + 0.5));
//Vector2 t2 = texturemapping.GetTextureCoordinate(new Vector2(1 - (p2.x + 0.5), p2.y + 0.5));
float transformRatio = top ? 1 : 0;
first = Transform(first, transformRatio);
second = Transform(second, transformRatio);
center = Transform(center, transformRatio);
Vertexes.Add(new VertexPositionColor(first, color));
Vertexes.Add(new VertexPositionColor(second, color));
Vertexes.Add(new VertexPositionColor(center, color));
}
}
}
// Handles the first face in the cut, starting from cutstart,
// and running anticlockwise to first reference vertex
private float PopulateSingleCutFacePositiveDirection(ref CrossSection face, OpenMetaverse.Vector3 cutPoint, int quadrant,
float halfCubeWidth, bool outer)
{
V3ToV3Xna XnaOMV = new V3ToV3Xna();
quadrant = NormalizeQuadrant(quadrant);
face.RemoveAllPoints();
OpenMetaverse.Vector3 startPoint = cutPoint;
OpenMetaverse.Vector3 endPoint;
if (quadrant < NumberFaces - 1)
{
endPoint = XnaOMV.V3XToV3(ReferenceVertices[quadrant + 1] * halfCubeWidth / 0.5f);
}
else
{
endPoint = XnaOMV.V3XToV3(ReferenceVertices[0] * halfCubeWidth / 0.5f);
}
if (outer)
{
face.AddPoint(startPoint);
face.AddPoint(endPoint);
}
else
{
face.AddPoint(endPoint);
face.AddPoint(startPoint);
}
return OpenMetaverse.Vector3.Distance(startPoint, endPoint);
}
private float PopulateCompleteSide(ref CrossSection face, int quadrant, float halfCubeWidth, bool outer)
{
V3ToV3Xna XnaOMV = new V3ToV3Xna();
quadrant = NormalizeQuadrant(quadrant);
face.RemoveAllPoints();
OpenMetaverse.Vector3 startPoint = XnaOMV.V3XToV3(ReferenceVertices[quadrant]);
OpenMetaverse.Vector3 endPoint;
if (quadrant < NumberFaces - 1)
{
endPoint = XnaOMV.V3XToV3(ReferenceVertices[quadrant + 1]);
}
else
{
endPoint = XnaOMV.V3XToV3(ReferenceVertices[0]);
}
startPoint = startPoint * halfCubeWidth / 0.5f;
endPoint = endPoint * halfCubeWidth / 0.5f;
if (outer)
{
face.AddPoint(startPoint);
face.AddPoint(endPoint);
}
else
{
face.AddPoint(endPoint);
face.AddPoint(startPoint);
}
return 2f * halfCubeWidth;
}
private OpenMetaverse.Vector3 GetCutIntersect(float cut, float cubeHalfWidth)
{
V3ToV3Xna XnaOMV = new V3ToV3Xna();
int cutQuadrant = GetCutQuadrant(cut);
OpenMetaverse.Vector3 lineend;
OpenMetaverse.Vector3 linestart = XnaOMV.V3XToV3(ReferenceVertices[cutQuadrant] * cubeHalfWidth);
linestart = OpenMetaverse.Vector3.Divide(linestart, 0.5f);
if (cutQuadrant < NumberFaces - 1)
{
lineend = XnaOMV.V3XToV3(ReferenceVertices[cutQuadrant + 1] * cubeHalfWidth);
}
else
{
lineend = XnaOMV.V3XToV3(ReferenceVertices[0] * cubeHalfWidth);
}
lineend = OpenMetaverse.Vector3.Divide(lineend, 0.5f);
//
float angle = GetAngleWithXAxis(cut);
// CutVectorPerp is perpendicular to the radius vector
OpenMetaverse.Vector3 cutVectorPerp = new OpenMetaverse.Vector3((float)-Math.Sin(angle), (float)Math.Cos(angle), 0);
OpenMetaverse.Vector3 delta = lineend - linestart;
// From http://softsurfer.com/Archive/algorithm_0104/algorithm_0104B.htm
OpenMetaverse.Vector3 result = linestart - delta * OpenMetaverse.Vector3.Dot(cutVectorPerp, linestart) / OpenMetaverse.Vector3.Dot(cutVectorPerp, delta);
return result;
}
protected void BuildSideVertexes(CrossSection[] crossSection, int transforms)
{
V3ToV3Xna XnaOMV = new V3ToV3Xna();
float transformOffset = 1.0f / (float)transforms;
float currentOffset = -0.5f;
for (int i = 0; i < transforms; i++)
{
for (int j = 0; j < crossSection.Length; j++)
{
int pointCount = crossSection[j].GetNumPoints();
if (pointCount > 0)
{
for (int k = 0; k < pointCount - 1; k++)
{
Vector3 lower1, lower2, upper1, upper2;
float lowerRatio = (float)i / (float)transforms;
float upperRatio = (float)(i + 1) / (float)transforms;
lower1 = XnaOMV.V3ToV3X(crossSection[j].GetRawVertex(k));
lower2 = XnaOMV.V3ToV3X(crossSection[j].GetRawVertex(k + 1));
lower1.Z = currentOffset;
lower2.Z = currentOffset;
upper1 = lower1;
upper2 = lower2;
upper1.Z = currentOffset + transformOffset;
upper2.Z = currentOffset + transformOffset;
lower1 = Transform(lower1, lowerRatio);
lower2 = Transform(lower2, lowerRatio);
upper1 = Transform(upper1, upperRatio);
upper2 = Transform(upper2, upperRatio);
Vertexes.Add(new VertexPositionColor(lower1, color));
Vertexes.Add(new VertexPositionColor(lower2, color));
Vertexes.Add(new VertexPositionColor(upper2, color));
Vertexes.Add(new VertexPositionColor(lower1, color));
Vertexes.Add(new VertexPositionColor(upper2, color));
Vertexes.Add(new VertexPositionColor(upper1, color));
}
}
}
currentOffset += transformOffset;
}
}
protected void BuildEndCapNoCutNoHollow(bool top)
{
V3ToV3Xna XnaOMV = new V3ToV3Xna();
float z = top ? 0.5f : -0.5f;
for (int i = 0; i < OuterFaces.Length; i++)
{
int pointCount = OuterFaces[i].GetNumPoints();
if (pointCount > 0)
{
for (int j = 0; j < pointCount - 1; j++)
{
Vector3 first = XnaOMV.V3ToV3X((OuterFaces[i].GetRawVertex(j)));
first.Z = z;
Vector3 second = XnaOMV.V3ToV3X(OuterFaces[i].GetRawVertex(j + 1));
second.Z = z;
Vector3 center = new Vector3(0, 0, z);
float transformRatio = top ? 1 : 0;
// Apply the transformation to each vertex
first = Transform(first, transformRatio);
second = Transform(second, transformRatio);
center = Transform(center, transformRatio);
Vertexes.Add(new VertexPositionColor(first, color));
Vertexes.Add(new VertexPositionColor(second, color));
Vertexes.Add(new VertexPositionColor(center, color));
}
}
}
}