protected override bool SubdivideTriangle(RoamTriangle triangle)
{
if (triangle.Material > 1)
{
return(false);
}
return(triangle.Level < MaxLevels);
}
protected override void ComputeVertexAltitude(RoamVertex vertex, RoamTriangle triangle)
{
vertex.LinearPosition = Vector3d.MiddlePoint(triangle.Vertexes0.LinearPosition, triangle.Vertexes2.LinearPosition);
vertex.Normal = Vector3d.Normalize(vertex.LinearPosition);
var t = MathHelper.SphericalToTextureCoords(vertex.Normal);
double h = _elevationTexture.ReadBilinearPixel(t.x, t.y, true, false);
double hAvg = _elevationTextureBlur.ReadBilinearPixel(t.x, t.y, true, false);
double r = PlanetRadius + (h - hAvg) * ElevationScale + hAvg;
vertex.Position = Vector3d.Multiply(vertex.Normal, r);
}
protected override void ComputeVertexAltitude(RoamVertex vertex, RoamTriangle triangle)
{
vertex.LinearPosition = Vector3d.MiddlePoint(triangle.Vertexes0.LinearPosition, triangle.Vertexes2.LinearPosition);
//vertex.Normal = Vector3d.Normalize(vertex.LinearPosition);
var tex = Vector2d.MiddlePoint(triangle.TextureCoords0, triangle.TextureCoords2);
double z = vertex.LinearPosition.z;
if (triangle.Material == 0)
{
z += 0.17 + 0.000030 * _topElevationBitmap.ReadBilinearPixel(tex.x, tex.y, false, false);
}
else if (triangle.Material == 1)
{
z -= 0.22 + 0.000034 * _bottomElevationBitmap.ReadBilinearPixel(tex.x, tex.y, false, false);
}
vertex.Position = new Vector3d(vertex.LinearPosition.x, vertex.LinearPosition.y, z);
}
protected override bool SubdivideTriangle(RoamTriangle triangle)
{
return(triangle.Level < MaxLevels);
}
