static protected void TrimToPlane(Vector4 plane, RoadStdRenderObj ro)
{
List <Int16> idxIn = new List <Int16>(ro.Indices);
List <Int16> idxOut = new List <Int16>(ro.Indices.Length);
List <RoadVertex> verts = new List <RoadVertex>(ro.Verts);
List <Vector4> planes = new List <Vector4>(1);
planes.Add(plane);
TrimIndexedTriList(planes, idxIn, idxOut, verts);
ro.Indices = new Int16[idxOut.Count];
idxOut.CopyTo(ro.Indices);
ro.Verts = new RoadVertex[verts.Count];
verts.CopyTo(ro.Verts);
ro.DirtyBuffers();
}
/// <summary>
/// Trim all geometry for two sections by the bisecting plane (if appropriate)
/// </summary>
/// <param name="plane"></param>
public virtual bool Trim(Road.Section first, Road.Section second)
{
RoadStdRenderObj roFirst = first.RenderObj as RoadStdRenderObj;
RoadStdRenderObj roSecond = second.RenderObj as RoadStdRenderObj;
if ((roFirst == null) || (roSecond == null))
{
return(false);
}
WayPoint.Node node0 = null;
WayPoint.Node node1 = null;
WayPoint.Node nodeC = null;
if (!FindBend(first, second, out nodeC, out node0, out node1))
{
return(false);
}
Vector2 edge0 = Vector2.Normalize(node0.Position2d - nodeC.Position2d);
Vector2 edge1 = Vector2.Normalize(node1.Position2d - nodeC.Position2d);
float dot = Vector2.Dot(edge0, edge1);
{
float cross = edge0.X * edge1.Y - edge0.Y * edge1.X;
double rads = Math.Atan2(cross, dot);
if (rads > 0.0)
{
Vector2 bisect = dot > -0.999f
? Vector2.Normalize(edge0 + edge1)
: new Vector2(-edge0.Y, edge0.X);
Vector3 norm = new Vector3(-bisect.Y, bisect.X, 0.0f);
float dist = Vector3.Dot(norm, nodeC.Position);
Vector4 plane = new Vector4(norm, dist);
TrimToPlane(-plane, roFirst);
TrimToPlane(plane, roSecond);
return(true);
}
}
return(false);
}
private void FlushBatch(Camera camera)
{
if (batch.Count > 0)
{
GraphicsDevice device = BokuGame.bokuGame.GraphicsDevice;
Effect effect = RoadStdRenderObj.Effect;
EffectTechnique technique = RoadStdRenderObj.Technique;
if (technique != null)
{
if (wireFrame)
{
device.RasterizerState = UI2D.Shared.RasterStateWireframe;
}
RoadStdRenderObj.Parameter(RoadStdRenderObj.EffectParams.WorldViewProjMatrix).SetValue(camera.ViewProjectionMatrix);
RoadStdRenderObj.Parameter(RoadStdRenderObj.EffectParams.WorldMatrix).SetValue(Matrix.Identity);
effect.CurrentTechnique = technique;
for (int iPass = 0; iPass < technique.Passes.Count; ++iPass)
{
EffectPass pass = technique.Passes[iPass];
pass.Apply();
foreach (RoadStdRenderObj obj in batch)
{
obj.RenderBatch(this);
}
}
if (wireFrame)
{
device.RasterizerState = RasterizerState.CullCounterClockwise;
}
}
batch.Clear();
}
}
/// <summary>
/// Generate a new section.
/// </summary>
/// <param name="section"></param>
public override void NewSection(Road.Section section)
{
section.RenderObj = null;
RoadVertex[] verts = GenVerts(section);
Int16[] indices = GenIndices(section);
if ((verts.Length > 0) && (indices.Length > 0))
{
RoadStdRenderObj ro = new RoadStdRenderObj();
ro.Verts = verts;
ro.Indices = indices;
ro.DiffuseTex0 = diffTex0;
ro.DiffuseTex1 = diffTex1;
ro.NormalTex0 = normTex0;
ro.NormalTex1 = normTex1;
ro.UVXfm = uvXfm;
ro.Shininess = Shininess;
section.RenderObj = ro;
}
}
/// <summary>
/// Add a renderable to the batching list pending FlushBatch.
/// </summary>
/// <param name="obj"></param>
public void AddBatch(RoadStdRenderObj obj)
{
batch.Add(obj);
}
protected virtual bool NewFan(
Road.Intersection isect,
Vector2 startRadial,
double rads,
List <Road.RenderObj> fans)
{
Road road = isect.Road;
int numRadials = (int)Math.Ceiling(rads / road.RadStep);
double radStep = rads / numRadials;
Vector2 center = isect.Node.Position2d;
int vertsPerRadial = VertsPerStep / 2;
int numVerts = (numRadials + 1) * vertsPerRadial + 1;
RoadVertex[] verts = new RoadVertex[numVerts];
Vector3 terrNormal = Vector3.UnitZ;
AABB box = AABB.EmptyBox();
int iVert = 0;
for (int iRadial = 0; iRadial <= numRadials; ++iRadial)
{
double ang = radStep * iRadial;
float cos = (float)Math.Cos(ang);
float sin = (float)Math.Sin(ang);
Vector2 radial = new Vector2(startRadial.X * cos - startRadial.Y * sin,
startRadial.X * sin + startRadial.Y * cos);
for (int iOut = 0; iOut < vertsPerRadial; ++iOut)
{
float width = widthTable[iOut];
float height = heightTable[iOut];
float arc = (float)(ang * width);
RoadVertex vtx = new RoadVertex();
Vector2 pos = center + width * radial;
//float baseHeight = isect.BaseHeight(pos);
//height += baseHeight;
vtx.pos.X = pos.X;
vtx.pos.Y = pos.Y;
vtx.pos.Z = height;
box.Union(vtx.pos);
vtx.norm = VtxNormal(terrNormal, radial, iOut);
vtx.uv.X = arc;
vtx.uv.Y = distTable[iOut];
vtx.texSelect = TexSelect(iOut);
verts[iVert++] = vtx;
}
}
float centerBaseHeight = 0.0f; // isect.BaseHeight(center);
float heightAtCenter = centerHeight + centerBaseHeight;
RoadVertex last = new RoadVertex();
last.pos.X = center.X;
last.pos.Y = center.Y;
last.pos.Z = heightAtCenter;
box.Union(last.pos);
last.norm = terrNormal;
last.uv.X = 0.0f;
last.uv.Y = 0.0f;
last.texSelect = TexSelect(0);
int centerIdx = iVert++;
verts[centerIdx] = last;
Debug.Assert(iVert == numVerts);
// First step per radial is a single tri,
// then the rest of the steps are quads
int quadsPerRadial = vertsPerRadial - 1;
int numTris = 0;
if (!skipTable[0])
{
numTris += numRadials;
numTris += numRadials * (quadsPerRadial - numSkips) * 2;
}
else
{
numTris += numRadials * (quadsPerRadial - (numSkips - 1)) * 2;
}
Int16[] indices = new Int16[numTris * 3];
int nextRad = vertsPerRadial;
int nextOut = 1;
int baseVtx = 0;
int idx = 0;
for (int iRadial = 0; iRadial < numRadials; ++iRadial)
{
if (!skipTable[0])
{
indices[idx++] = (Int16)(baseVtx);
indices[idx++] = (Int16)(centerIdx);
indices[idx++] = (Int16)(baseVtx + nextRad);
}
for (int iOut = 0; iOut < quadsPerRadial; iOut++)
{
if (!skipTable[iOut + 1])
{
indices[idx++] = (Int16)(baseVtx + iOut + nextRad);
indices[idx++] = (Int16)(baseVtx + iOut + nextRad + nextOut);
indices[idx++] = (Int16)(baseVtx + iOut);
indices[idx++] = (Int16)(baseVtx + iOut);
indices[idx++] = (Int16)(baseVtx + iOut + nextRad + nextOut);
indices[idx++] = (Int16)(baseVtx + iOut + nextOut);
}
}
baseVtx += nextRad;
}
Debug.Assert(idx == numTris * 3);
RoadStdRenderObj ro = null;
if ((verts.Length > 0) && (indices.Length > 0))
{
ro = new RoadStdRenderObj();
ro.Verts = verts;
ro.Indices = indices;
ro.DiffuseTex0 = diffTex0;
ro.DiffuseTex1 = diffTex1;
ro.NormalTex0 = normTex0;
ro.NormalTex1 = normTex1;
ro.UVXfm = uvXfm;
ro.Shininess = Shininess;
ro.Sphere = box.MakeSphere();
fans.Add(ro);
return(true);
}
return(false);
}
