float CalculatePatchDistance(Patch p)
{
int centerX = (p.worldX + p.worldX+PATCH_SIZE) >> 1;
int centerY = (p.worldY + p.worldX + PATCH_SIZE) >> 1;
int centerZ = FetchFunction(centerX, centerY);
Vector3 center = new Vector3(centerX, centerZ, centerY);
float distance = (center - CameraPos).Length();
return distance;
}
bool IsPatchVisible(Patch p)
{
bool b = VisibleFunction(p.worldX, p.worldY + this.PATCH_SIZE,
p.worldX + this.PATCH_SIZE, p.worldY,
p.worldX, p.worldY);
b |= VisibleFunction(p.worldX + this.PATCH_SIZE, p.worldY,
p.worldX, p.worldY + this.PATCH_SIZE,
p.worldX + this.PATCH_SIZE, p.worldY + this.PATCH_SIZE);
return b;
}
public void Init()
{
MaxTris = NUM_PATCHES_PER_SIDE * NUM_PATCHES_PER_SIDE * 4;
nodeList = new TriTreeNode[MaxTris];
for (int i = 0; i < nodeList.Length; i++)
{
nodeList[i] = new TriTreeNode();
nodeList[i].Self = i;
}
Patches = new Patch[NUM_PATCHES_PER_SIDE, NUM_PATCHES_PER_SIDE];
for(int y = 0; y < NUM_PATCHES_PER_SIDE; y++)
for (int x = 0; x < NUM_PATCHES_PER_SIDE; x++)
{
Patch p = new Patch(this);
p.Init(x*PATCH_SIZE, y * PATCH_SIZE, x * PATCH_SIZE, y * PATCH_SIZE);
Patches[y, x] = p;
}
this.Reset();
this.RecreateVertices();
}
