public void GenerateAt(int x, int y, int z)
{
int corners = 0;
for (int i = 0; i < 8; i++)
{
if (map[x + i / 4, y + i % 4 / 2, z + i % 2] < 0)
corners |= 1 << i;
}
if (corners == 0 || corners == 255)
return;
VertexPositionColor[] vs = new VertexPositionColor[24];
Color c = Color.LightSteelBlue;
vs[0] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 0)), c);
vs[1] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 0)), c);
vs[2] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 0)), c);
vs[3] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 0)), c);
vs[4] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 0)), c);
vs[5] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 0)), c);
vs[6] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 0)), c);
vs[7] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 0)), c);
vs[8] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 1)), c);
vs[9] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 1)), c);
vs[10] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 1)), c);
vs[11] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 1)), c);
vs[12] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 1)), c);
vs[13] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 1)), c);
vs[14] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 1)), c);
vs[15] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 1)), c);
vs[16] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 0)), c);
vs[17] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 1)), c);
vs[18] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 0)), c);
vs[19] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 1)), c);
vs[20] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 0)), c);
vs[21] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 1)), c);
vs[22] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 0)), c);
vs[23] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 1)), c);
OutlineBuffer.SetData<VertexPositionColor>(OutlineLocation * VertexPositionColor.VertexDeclaration.VertexStride, vs, 0, 24, VertexPositionColor.VertexDeclaration.VertexStride);
OutlineLocation += 24;
QEF3D qef = new QEF3D();
Vector3 average_normal = new Vector3();
for (int i = 0; i < 12; i++)
{
int c1 = edges[i, 0];
int c2 = edges[i, 1];
int m1 = (corners >> c1) & 1;
int m2 = (corners >> c2) & 1;
if (m1 == m2)
continue;
float d1 = map[x + c1 / 4, y + c1 % 4 / 2, z + c1 % 2];
float d2 = map[x + c2 / 4, y + c2 % 4 / 2, z + c2 % 2];
Vector3 p1 = new Vector3((float)((c1 / 4)), (float)((c1 % 4 / 2)), (float)((c1 % 2)));
Vector3 p2 = new Vector3((float)((c2 / 4)), (float)((c2 % 4 / 2)), (float)((c2 % 2)));
Vector3 intersection = Sampler.GetIntersection(p1, p2, d1, d2);
Vector3 normal = Sampler.GetNormal(intersection + new Vector3(x, y, z));//GetNormal(x, y);
average_normal += normal;
qef.Add(intersection, normal);
}
Vector3 p = qef.Solve2(0, 16, 0);
Vector3 n = average_normal / (float)qef.Intersections.Count;
VertexPositionColorNormal[] v2 = new VertexPositionColorNormal[1];
Vector3 c_v = n * 0.5f + Vector3.One * 0.5f;
c_v.Normalize();
Color clr = new Color(c_v);
v2[0] = new VertexPositionColorNormal(new Vector3((p.X + x), (p.Y + y), (p.Z + z)), clr, n);
VertexBuffer.SetData<VertexPositionColorNormal>(VertexCount * VertexPositionColorNormal.VertexDeclaration.VertexStride, v2, 0, 1, VertexPositionColorNormal.VertexDeclaration.VertexStride);
vertex_indexes[x, y, z] = VertexCount;
VertexCount++;
/*vs[0] = new VertexPositionColor(new Vector3((x + 0) , (y + 0) , 0), Color.Black);
vs[1] = new VertexPositionColor(new Vector3((x + 1) , (y + 0) , 0), Color.Black);
vs[2] = new VertexPositionColor(new Vector3((x + 1) , (y + 0) , 0), Color.Black);
vs[3] = new VertexPositionColor(new Vector3((x + 1) , (y + 1) , 0), Color.Black);
vs[4] = new VertexPositionColor(new Vector3((x + 1) , (y + 1) , 0), Color.Black);
vs[5] = new VertexPositionColor(new Vector3((x + 0) , (y + 1) , 0), Color.Black);
vs[6] = new VertexPositionColor(new Vector3((x + 0) , (y + 1) , 0), Color.Black);
vs[7] = new VertexPositionColor(new Vector3((x + 0) , (y + 0) , 0), Color.Black);
vs[8] = new VertexPositionColor(new Vector3((p.X + x) , (p.Y + y) , 0), Color.Black);
vs[9] = new VertexPositionColor(new Vector3((p.X + x + .1f) , (p.Y + y + .1f) , 0), Color.Black);
index = 10;
VertexBuffer.SetData<VertexPositionColor>(VertexCount * VertexPositionColor.VertexDeclaration.VertexStride, vs, 0, index, VertexPositionColor.VertexDeclaration.VertexStride);
VertexCount += index;*/
}
public void GenerateAt(int x, int y, int z)
{
int corners = 0;
for (int i = 0; i < 8; i++)
{
if (map[x + i / 4, y + i % 4 / 2, z + i % 2] < 0)
{
corners |= 1 << i;
}
}
if (corners == 0 || corners == 255)
{
return;
}
VertexPositionColor[] vs = new VertexPositionColor[24];
Color c = Color.LightSteelBlue;
vs[0] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 0)), c);
vs[1] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 0)), c);
vs[2] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 0)), c);
vs[3] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 0)), c);
vs[4] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 0)), c);
vs[5] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 0)), c);
vs[6] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 0)), c);
vs[7] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 0)), c);
vs[8] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 1)), c);
vs[9] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 1)), c);
vs[10] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 1)), c);
vs[11] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 1)), c);
vs[12] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 1)), c);
vs[13] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 1)), c);
vs[14] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 1)), c);
vs[15] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 1)), c);
vs[16] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 0)), c);
vs[17] = new VertexPositionColor(new Vector3((x + 0), (y + 0), (z + 1)), c);
vs[18] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 0)), c);
vs[19] = new VertexPositionColor(new Vector3((x + 0), (y + 1), (z + 1)), c);
vs[20] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 0)), c);
vs[21] = new VertexPositionColor(new Vector3((x + 1), (y + 0), (z + 1)), c);
vs[22] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 0)), c);
vs[23] = new VertexPositionColor(new Vector3((x + 1), (y + 1), (z + 1)), c);
OutlineBuffer.SetData <VertexPositionColor>(OutlineLocation * VertexPositionColor.VertexDeclaration.VertexStride, vs, 0, 24, VertexPositionColor.VertexDeclaration.VertexStride);
OutlineLocation += 24;
QEF3D qef = new QEF3D();
Vector3 average_normal = new Vector3();
for (int i = 0; i < 12; i++)
{
int c1 = edges[i, 0];
int c2 = edges[i, 1];
int m1 = (corners >> c1) & 1;
int m2 = (corners >> c2) & 1;
if (m1 == m2)
{
continue;
}
float d1 = map[x + c1 / 4, y + c1 % 4 / 2, z + c1 % 2];
float d2 = map[x + c2 / 4, y + c2 % 4 / 2, z + c2 % 2];
Vector3 p1 = new Vector3((float)((c1 / 4)), (float)((c1 % 4 / 2)), (float)((c1 % 2)));
Vector3 p2 = new Vector3((float)((c2 / 4)), (float)((c2 % 4 / 2)), (float)((c2 % 2)));
Vector3 intersection = Sampler.GetIntersection(p1, p2, d1, d2);
Vector3 normal = Sampler.GetNormal(intersection + new Vector3(x, y, z)); //GetNormal(x, y);
average_normal += normal;
qef.Add(intersection, normal);
}
Vector3 p = qef.Solve2(0, 16, 0);
Vector3 n = average_normal / (float)qef.Intersections.Count;
VertexPositionColorNormal[] v2 = new VertexPositionColorNormal[1];
Vector3 c_v = n * 0.5f + Vector3.One * 0.5f;
c_v.Normalize();
Color clr = new Color(c_v);
v2[0] = new VertexPositionColorNormal(new Vector3((p.X + x), (p.Y + y), (p.Z + z)), clr, n);
VertexBuffer.SetData <VertexPositionColorNormal>(VertexCount * VertexPositionColorNormal.VertexDeclaration.VertexStride, v2, 0, 1, VertexPositionColorNormal.VertexDeclaration.VertexStride);
vertex_indexes[x, y, z] = VertexCount;
VertexCount++;
/*vs[0] = new VertexPositionColor(new Vector3((x + 0) , (y + 0) , 0), Color.Black);
* vs[1] = new VertexPositionColor(new Vector3((x + 1) , (y + 0) , 0), Color.Black);
* vs[2] = new VertexPositionColor(new Vector3((x + 1) , (y + 0) , 0), Color.Black);
* vs[3] = new VertexPositionColor(new Vector3((x + 1) , (y + 1) , 0), Color.Black);
* vs[4] = new VertexPositionColor(new Vector3((x + 1) , (y + 1) , 0), Color.Black);
* vs[5] = new VertexPositionColor(new Vector3((x + 0) , (y + 1) , 0), Color.Black);
* vs[6] = new VertexPositionColor(new Vector3((x + 0) , (y + 1) , 0), Color.Black);
* vs[7] = new VertexPositionColor(new Vector3((x + 0) , (y + 0) , 0), Color.Black);
*
* vs[8] = new VertexPositionColor(new Vector3((p.X + x) , (p.Y + y) , 0), Color.Black);
* vs[9] = new VertexPositionColor(new Vector3((p.X + x + .1f) , (p.Y + y + .1f) , 0), Color.Black);
* index = 10;
*
* VertexBuffer.SetData<VertexPositionColor>(VertexCount * VertexPositionColor.VertexDeclaration.VertexStride, vs, 0, index, VertexPositionColor.VertexDeclaration.VertexStride);
* VertexCount += index;*/
}
/* The following code is more or less a copy/paste cleanup of the C++ implementation
* It's not clean, or efficient, but it works and is fairly straightforward
*/
public bool ConstructLeaf(List<VertexPositionColorNormal> vertices, int grid_size)
{
if (size != 1)
return false;
int corners = 0;
float[, ,] samples = new float[2, 2, 2];
for (int i = 0; i < 8; i++)
{
if ((samples[i / 4, i % 4 / 2, i % 2] = Sampler.Sample(position + new Vector3(i / 4, i % 4 / 2, i % 2))) < 0)
corners |= 1 << i;
}
if (corners == 0 || corners == 255)
return false;
//type = OctreeNodeType.Leaf;
//return true;
QEF3D qef = new QEF3D();
QEFProper.QEFSolver qefp = new QEFProper.QEFSolver();
Vector3 average_normal = Vector3.Zero;
for (int i = 0; i < 12; i++)
{
int c1 = edgevmap[i, 0];
int c2 = edgevmap[i, 1];
int m1 = (corners >> c1) & 1;
int m2 = (corners >> c2) & 1;
if (m1 == m2)
continue;
float d1 = samples[c1 / 4, c1 % 4 / 2, c1 % 2];
float d2 = samples[c2 / 4, c2 % 4 / 2, c2 % 2];
Vector3 p1 = new Vector3((float)((c1 / 4)), (float)((c1 % 4 / 2)), (float)((c1 % 2)));
Vector3 p2 = new Vector3((float)((c2 / 4)), (float)((c2 % 4 / 2)), (float)((c2 % 2)));
Vector3 intersection = Sampler.GetIntersection(p1, p2, d1, d2) + position;
Vector3 normal = Sampler.GetNormal(intersection);//GetNormal(x, y);
average_normal += normal;
qef.Add(intersection, normal);
qefp.Add(intersection, normal);
}
Vector3 n = average_normal / (float)qef.Intersections.Count;
n.Normalize();
draw_info = new OctreeDrawInfo();
//draw_info.position = position + qef.Solve2(0, 0, 0);
draw_info.position = qefp.Solve(1e-6f, 4, 1e-6f);
draw_info.corners = corners;
draw_info.averageNormal = n;
draw_info.qef = qefp;
//vertices.Add(new VertexPositionColorNormal(position + draw_info.position, Color.LightGreen, n));
type = OctreeNodeType.Leaf;
return true;
}
/* The following code is more or less a copy/paste cleanup of the C++ implementation
* It's not clean, or efficient, but it works and is fairly straightforward
*/
public bool ConstructLeaf(List <VertexPositionColorNormal> vertices, int grid_size)
{
if (size != 1)
{
return(false);
}
int corners = 0;
float[, ,] samples = new float[2, 2, 2];
for (int i = 0; i < 8; i++)
{
if ((samples[i / 4, i % 4 / 2, i % 2] = Sampler.Sample(position + new Vector3(i / 4, i % 4 / 2, i % 2))) < 0)
{
corners |= 1 << i;
}
}
if (corners == 0 || corners == 255)
{
return(false);
}
//type = OctreeNodeType.Leaf;
//return true;
QEF3D qef = new QEF3D();
QEFProper.QEFSolver qefp = new QEFProper.QEFSolver();
Vector3 average_normal = Vector3.Zero;
for (int i = 0; i < 12; i++)
{
int c1 = edgevmap[i, 0];
int c2 = edgevmap[i, 1];
int m1 = (corners >> c1) & 1;
int m2 = (corners >> c2) & 1;
if (m1 == m2)
{
continue;
}
float d1 = samples[c1 / 4, c1 % 4 / 2, c1 % 2];
float d2 = samples[c2 / 4, c2 % 4 / 2, c2 % 2];
Vector3 p1 = new Vector3((float)((c1 / 4)), (float)((c1 % 4 / 2)), (float)((c1 % 2)));
Vector3 p2 = new Vector3((float)((c2 / 4)), (float)((c2 % 4 / 2)), (float)((c2 % 2)));
Vector3 intersection = Sampler.GetIntersection(p1, p2, d1, d2) + position;
Vector3 normal = Sampler.GetNormal(intersection); //GetNormal(x, y);
average_normal += normal;
qef.Add(intersection, normal);
qefp.Add(intersection, normal);
}
Vector3 n = average_normal / (float)qef.Intersections.Count;
n.Normalize();
draw_info = new OctreeDrawInfo();
//draw_info.position = position + qef.Solve2(0, 0, 0);
draw_info.position = qefp.Solve(1e-6f, 4, 1e-6f);
draw_info.corners = corners;
draw_info.averageNormal = n;
draw_info.qef = qefp;
//vertices.Add(new VertexPositionColorNormal(position + draw_info.position, Color.LightGreen, n));
type = OctreeNodeType.Leaf;
return(true);
}
public void Simplify(float threshold, bool randomize = false)
{
if (type != OctreeNodeType.Internal)
return;
int[] signs = { -1, -1, -1, -1, -1, -1, -1, -1 };
int mid_sign = -1;
bool is_collapsible = true;
QEF3D qef = new QEF3D();
Random rnd = new Random();
float t = threshold;
for (int i = 0; i < 8; i++)
{
if (children[i] == null)
continue;
if (randomize)
t = (float)rnd.NextDouble() * (float)rnd.NextDouble() * 20.0f;
children[i].Simplify(t);
OctreeNode child = children[i];
if (child.type == OctreeNodeType.Internal)
is_collapsible = false;
else
{
qef.Add(child.draw_info.position, child.draw_info.averageNormal);
mid_sign = (child.draw_info.corners >> (7 - i)) & 1;
signs[i] = (child.draw_info.corners >> i) & 1;
}
}
if (!is_collapsible)
return;
Vector3 pos = qef.Solve2(0, 0, 0);
float error = qef.Error;
if (error > threshold)
return;
OctreeDrawInfo draw_info = new OctreeDrawInfo();
for (int i = 0; i < 8; i++)
{
if (signs[i] == -1)
draw_info.corners |= mid_sign << i;
else
draw_info.corners |= signs[i] << i;
}
Vector3 normal = new Vector3();
for (int i = 0; i < 8; i++)
{
if (children[i] != null)
{
OctreeNode child = children[i];
if (child.type == OctreeNodeType.Pseudo || child.type == OctreeNodeType.Leaf)
normal += child.draw_info.averageNormal;
}
}
normal.Normalize();
draw_info.averageNormal = normal;
draw_info.position = pos;
for (int i = 0; i < 8; i++)
{
children[i] = null;
}
type = OctreeNodeType.Pseudo;
this.draw_info = draw_info;
}
