private static void AddCgfToWorld(CgfLoader cgf, ref Matrix xform,
Vector3 position, GeoSpace geoSpace)
{
s_tempVertices.Clear();
// traverse nodes
cgf.TraverseNodes((node, transform) =>
NodeHandler(cgf, node, position, transform), ref xform);
// Add collected vertices as a new mesh.
geoSpace.AddCollidableMeshToTree(s_tempVertices);
}
private void DrawCgfInWorld(CgfLoader cgf, ref Matrix xform, Vector3 position, CgfDrawStyle style,
List <VertexPositionColor> vertices,
List <VertexPositionColor> collisionVertices,
List <VertexPositionColor> lineVertices)
{
// Collect collidable meshes
int collisionStart = collisionVertices.Count;
// traverse nodes
cgf.TraverseNodes((node, transform)
=> NodeHandler(cgf, node, position, transform, vertices, collisionVertices, lineVertices, style),
ref xform);
// Add collected vertices as a new mesh.
m_geoSpace.AddCollidableMeshToTree(collisionVertices, collisionStart, collisionVertices.Count - collisionStart);
}
// load terrain vertices for collision testing
public void LoadIntoGeoSpace(GeoSpace geoSpace)
{
if (isEmpty)
{
return;
}
// Rules:
// - subdivide X & Y to create smaller AABBs for geospace.
// - remove steep slopes.
const int subdivide = 8;
var meshTriangleVertices = new List <Vector3>();
for (int sectorY = 0; sectorY < width - 1; sectorY += subdivide)
{
for (int sectorX = 0; sectorX < width - 1; sectorX += subdivide)
{
meshTriangleVertices.Clear();
// can reduce to 2 triangles only if all vertices are the same height and none are removed.
// TODO - use a real poly reduction algorithm instead of fixed size.
bool optimizationAllowed = true;
int endX = Math.Min(width - 1, sectorX + subdivide);
int endY = Math.Min(width - 1, sectorY + subdivide);
for (int y = sectorY; y < endY; y++)
{
for (int x = sectorX; x < endX; x++)
{
var p1 = VertexLookup(x, y);
var p2 = VertexLookup(x, y + 1);
var p3 = VertexLookup(x + 1, y);
var p4 = VertexLookup(x + 1, y + 1);
// TODO - replace with a correct slope test.
// TODO - test if any maps have unit size other than 2.
if (Math.Abs(p1.Z - p2.Z) >= 2 || Math.Abs(p1.Z - p3.Z) >= 2)
{
optimizationAllowed = false;
continue;
}
meshTriangleVertices.Add(p1);
meshTriangleVertices.Add(p3);
meshTriangleVertices.Add(p2);
meshTriangleVertices.Add(p2);
meshTriangleVertices.Add(p4);
meshTriangleVertices.Add(p3);
}
}
if (meshTriangleVertices.Count == 0)
{
continue;
}
if (optimizationAllowed)
{
// if all points have the same Z, replace with 2 triangles.
if (meshTriangleVertices.All(v => v.Z == meshTriangleVertices[0].Z))
{
// don't optimize if there is a mix of 3F and non-3F mats, as this would break cutouts.
// a mix would be rare, so for simplicity, just don't optimize when 3F is found.
bool anyMat3F = false;
for (int y = sectorY; y < endY; y++)
{
for (int x = sectorX; x < endX; x++)
{
if (IsCutout(x, y))
{
anyMat3F = true;
goto exitMatCheck;
}
}
}
exitMatCheck:
if (!anyMat3F)
{
var p1 = VertexLookup(sectorX, sectorY);
var p2 = VertexLookup(sectorX, endY);
var p3 = VertexLookup(endX, sectorY);
var p4 = VertexLookup(endX, endY);
if (p1.Z != meshTriangleVertices[0].Z ||
p2.Z != meshTriangleVertices[0].Z ||
p3.Z != meshTriangleVertices[0].Z ||
p4.Z != meshTriangleVertices[0].Z)
{
throw new InvalidOperationException("Z mismatch");
}
meshTriangleVertices.Clear();
meshTriangleVertices.Add(p1);
meshTriangleVertices.Add(p3);
meshTriangleVertices.Add(p2);
meshTriangleVertices.Add(p2);
meshTriangleVertices.Add(p4);
meshTriangleVertices.Add(p3);
}
}
}
geoSpace.AddCollidableMeshToTree(meshTriangleVertices);
}
}
}