public static MeshNode generate_arbitrary_quad(Vector3 v0, Vector3 v1,
Vector3 v2, Vector3 v3, Vector3 center, float uvMult)
{
MeshNode n0 = new MeshNode(v0, v0 - center, new Vector2(1.0f * uvMult, 1.0f * uvMult));
MeshNode n1 = new MeshNode(v1, v1 - center, new Vector2(2.0f * uvMult, 1.0f * uvMult));
MeshNode n2 = new MeshNode(v2, v2 - center, new Vector2(1.0f * uvMult, 2.0f * uvMult));
MeshNode n3 = new MeshNode(v3, v3 - center, new Vector2(2.0f * uvMult, 2.0f * uvMult));
//connect square
//0_____1
//|\ |
//| \ |
//| \ |
//| \ |
//| \|
//2_____3
//
//border edges
n0.AddEdge(n1);
n0.AddEdge(n2);
n1.AddEdge(n3);
n2.AddEdge(n3);
//cross edge
n0.AddEdge(n3);
//return v0 as center point
return(n0);
}
private static void cone_recurse(MeshNode n0, MeshNode n1)
{
List <MeshNode> edgesCopy = new List <MeshNode>(n0.edges);
n0.visited = true;
n0.AddEdge(n1);
for (int i = 0; i < edgesCopy.Count; i++)
{
if (edgesCopy[i].visited == false)
{
cone_recurse(edgesCopy[i], n1);
}
}
}
// Add a point on the edge between this and n0
public MeshNode SplitEdge(MeshNode n0, Vector3 position, Vector3 normal)
{
MeshNode insert = new MeshNode(position, normal,
new Vector2((uv.x + n0.uv.x) / 2.0f, (uv.y + n0.uv.y) / 2.0f));
//add insert in the middle
insert.AddEdge(this);
insert.AddEdge(n0);
this.RemoveEdge(n0);
//TODO check this
//set insert as visited initially
insert.visited = false;
//now add shared edges to create new tris
for (int i = 0; i < n0.edges.Count; i++)
{
if (this.edges.Contains(n0.edges[i]) && n0.edges[i] != insert)
{
insert.AddEdge(n0.edges[i]);
}
}
return(insert);
}
//TODO write this function to draw the cross values
private static void cylinder_recurse(MeshNode n0, MeshNode n1, MeshNode back)
{
List <MeshNode> edgesCopy = new List <MeshNode>(n0.edges);
List <MeshNode> edgesCopy2 = new List <MeshNode>(n1.edges);
bool last_node = true;
n0.visited = true;
n1.visited = true;
n0.AddEdge(n1);
for (int i = 0; i < edgesCopy.Count; i++)
{
if (edgesCopy[i].visited == false)
{
edgesCopy[i].AddEdge(n1);
cylinder_recurse(edgesCopy[i], edgesCopy2[i], back);
last_node = false;
}
}
if (last_node == true)
{
n1.AddEdge(back);
}
}
//use meshnode n0 to return the non directional graph of a cube
public static MeshNode generate_cube(float x, float y, float z, float a0, float a1, float a2)
{
Vector3 center = new Vector3(x, y, z);
//statically declare al 8 vertices
//TODO figure out UV
MeshNode n0 = new MeshNode(
new Vector3(x - 0.5f * a0, y - 0.5f * a1, z - 0.5f * a2),
new Vector3(x - 0.5f * a0 - center.x, y - 0.5f * a1 - center.y, z - 0.5f * a2 - center.z),
new Vector2(0, 0));
MeshNode n1 = new MeshNode(
new Vector3(x + 0.5f * a0, y - 0.5f * a1, z - 0.5f * a2),
new Vector3(x + 0.5f * a0 - center.x, y - 0.5f * a1 - center.y, z - 0.5f * a2 - center.z),
new Vector2(1, 0));
MeshNode n2 = new MeshNode(
new Vector3(x - 0.5f * a0, y + 0.5f * a1, z - 0.5f * a2),
new Vector3(x - 0.5f * a0 - center.x, y + 0.5f * a1 - center.y, z - 0.5f * a2 - center.z),
new Vector2(0, 1));
MeshNode n3 = new MeshNode(
new Vector3(x + 0.5f * a0, y + 0.5f * a1, z - 0.5f * a2),
new Vector3(x + 0.5f * a0 - center.x, y + 0.5f * a1 - center.y, z - 0.5f * a2 - center.z),
new Vector2(1, 1));
MeshNode n4 = new MeshNode(
new Vector3(x - 0.5f * a0, y - 0.5f * a1, z + 0.5f * a2),
new Vector3(x - 0.5f * a0 - center.x, y - 0.5f * a1 - center.y, z + 0.5f * a2 - center.z),
new Vector2(0, 1));
MeshNode n5 = new MeshNode(
new Vector3(x + 0.5f * a0, y - 0.5f * a1, z + 0.5f * a2),
new Vector3(x + 0.5f * a0 - center.x, y - 0.5f * a1 - center.y, z + 0.5f * a2 - center.z),
new Vector2(1, 1));
MeshNode n6 = new MeshNode(
new Vector3(x - 0.5f * a0, y + 0.5f * a1, z + 0.5f * a2),
new Vector3(x - 0.5f * a0 - center.x, y + 0.5f * a1 - center.y, z + 0.5f * a2 - center.z),
new Vector2(0, 0));
MeshNode n7 = new MeshNode(
new Vector3(x + 0.5f * a0, y + 0.5f * a1, z + 0.5f * a2),
new Vector3(x + 0.5f * a0 - center.x, y + 0.5f * a1 - center.y, z + 0.5f * a2 - center.z),
new Vector2(1, 0));
//cube vertices
//4______6
//|\ |\
//| \ | \
//| \5__|__7
//0___|__2 |
// \ | \ |
// \ | \ |
// \1_____3
//create edges all basic triangles <3
//direct
n0.AddEdge(n1);
n0.AddEdge(n2);
n0.AddEdge(n4);
n1.AddEdge(n3);
n1.AddEdge(n5);
n2.AddEdge(n3);
n2.AddEdge(n6);
n3.AddEdge(n7);
n4.AddEdge(n5);
n4.AddEdge(n6);
n5.AddEdge(n7);
n6.AddEdge(n7);
//diags
n0.AddEdge(n6);
n1.AddEdge(n4);
n2.AddEdge(n7);
n3.AddEdge(n5);
n5.AddEdge(n6);
n1.AddEdge(n2);
return(n0);
}
public static MeshNode generate_square(float x, float y, float z, float width, Axis axis, Vector3 center, float uvMult)
{
Vector3 v0, v1, v2, v3;
//center point
Vector3 v4 = new Vector3(x, y, z);
switch (axis)
{
case Axis.X_AXIS:
v0 = new Vector3(x, y - 0.5f * width, z - 0.5f * width);
v1 = new Vector3(x, y + 0.5f * width, z - 0.5f * width);
v2 = new Vector3(x, y - 0.5f * width, z + 0.5f * width);
v3 = new Vector3(x, y + 0.5f * width, z + 0.5f * width);
break;
case Axis.Y_AXIS:
v0 = new Vector3(x - 0.5f * width, y, z - 0.5f * width);
v1 = new Vector3(x + 0.5f * width, y, z - 0.5f * width);
v2 = new Vector3(x - 0.5f * width, y, z + 0.5f * width);
v3 = new Vector3(x + 0.5f * width, y, z + 0.5f * width);
break;
case Axis.Z_AXIS:
v0 = new Vector3(x - 0.5f * width, y - 0.5f * width, z);
v1 = new Vector3(x + 0.5f * width, y - 0.5f * width, z);
v2 = new Vector3(x - 0.5f * width, y + 0.5f * width, z);
v3 = new Vector3(x + 0.5f * width, y + 0.5f * width, z);
break;
default:
v0 = new Vector3(0, 0, 0);
v1 = new Vector3(0, 0, 0);
v2 = new Vector3(0, 0, 0);
v3 = new Vector3(0, 0, 0);
break;
}
MeshNode n0 = new MeshNode(v0, v0 - center, new Vector2(1.0f * uvMult, 1.0f * uvMult));
MeshNode n1 = new MeshNode(v1, v1 - center, new Vector2(2.0f * uvMult, 1.0f * uvMult));
MeshNode n2 = new MeshNode(v2, v2 - center, new Vector2(1.0f * uvMult, 2.0f * uvMult));
MeshNode n3 = new MeshNode(v3, v3 - center, new Vector2(2.0f * uvMult, 2.0f * uvMult));
MeshNode n4 = new MeshNode(v4, v4 - center, new Vector2(1.5f * uvMult, 1.5f * uvMult));
//connect square
//0_____1
//|\ /|
//| \ / |
//| 4 |
//| / \ |
//|/ \|
//2_____3
//
//border edges
n0.AddEdge(n1);
n0.AddEdge(n2);
n1.AddEdge(n3);
n2.AddEdge(n3);
//cross edges
n4.AddEdge(n0);
n4.AddEdge(n1);
n4.AddEdge(n2);
n4.AddEdge(n3);
//return head as center point
return(n4);
}