| children | Type:(simple-array terrain-node (4)). |
|---|---|
| cull-centre | The the vertex which lies at the midpoint in
the x-y plane and mid-way between the highest and lowest actual z values of
other vertices (I think it only looks at the current value, probably not all
children at the moment). Initform:(make-array
3
element-type
'single-float); Type:(simple-array
single-float
(3)). |
| cull-radius | The distance between the cull-centre and the
furthest vertex in this node's vertices (just the corners of this node, again,
I think, and not the childrens' geometry. Type:single-float. |
| east | Neighbour patch to the east. Accessors:east-of; Type:terrain-patch. |
| height | The base height for this node. These will be all the
same for each other node in the same hierachical level. Each successive level
has half of the height of the former. Ie. root node level 0 has *base-height*,
level 1 *base-height*/2, level 2 *base-height*/4, etc. Initform:*base-height*, Initargs::height; Type:single-float. |
| level | The level of this node in the hierachy, 0 is root, 1 next, etc. Initform:0; Accessors:level; Type:integer. |
| master | Whether this node is at the ‘master’ level, ie. has a
terrain patch. This might not be necessary actually, as we could just check
whether or not terrain-patch is bound. Initargs::master; Accessors:master; Type:boolean. |
| ne | The coordinate location of the actual north-east vertex
of this node. The z value has been ‘compressed’ here. Initform:(make-array
3
element-type
'single-float); Type:(simple-array
single-float
(3)). |
| north | Neighbour patch to the north. Accessors:north-of; Type:terrain-patch. |
| nw | The coordinate location of the actual north-west vertex
of this node. The z value has been ‘compressed’ here. Initform:(make-array
3
element-type
'single-float); Type:(simple-array
single-float
(3)). |
| rne | The raw ‘seed’ or ‘uncompressed’ heightmap value
for the north-east vertex of the node. Used to calculate child heights. Type:single-float. |
| rnw | The raw ‘seed’ or ‘uncompressed’ heightmap value
for the north-west vertex of the node. Used to calculate child heights. Type:single-float. |
| rse | The raw ‘seed’ or ‘uncompressed’ heightmap value
for the south-east vertex of the node. Used to calculate child heights. Type:single-float. |
| rsw | The raw ‘seed’ or ‘uncompressed’ heightmap value
for the south-west vertex of the node. Used to calculate child heights. Type:single-float. |
| se | The coordinate location of the actual south-east vertex
of this node. The z value has been ‘compressed’ here. Initform:(make-array
3
element-type
'single-float); Type:(simple-array
single-float
(3)). |
| south | Neighbour patch to the south. Accessors:south-of; Type:terrain-patch. |
| sw | The coordinate location of the actual south-west vertex
of this node. The z value has been ‘compressed’ here. Initform:(make-array
3
element-type
'single-float); Type:(simple-array
single-float
(3)). |
| terrain-patch | The terrain patch related to this node. Initargs::terrain-patch; Accessors:terrain-patch-of; Type:terrain-patch. |
| west | Neighbour patch to the west. Accessors:west-of; Type:terrain-patch. |
| x | The longitudinal index of this node in its level. Initform:0, Initargs::x; Reader:x; Type:(unsigned-byte
16). |
| y | The latitudinal index of this node in its level. Initform:0, Initargs::y; Reader:y; Type:(unsigned-byte
16). |
| for-each-visible-triangle | |
|---|---|
| size-x | |
| size-y | |
| x | |
| y |