mod_sim::TileFactory Class Reference

Makes drawable Tile objects from a section of heightmap. More...

#include <mod_sim_terrain_tile.hh>

List of all members.

Public Member Functions
	TileFactory (void)
	~TileFactory ()
void	Populate (const BoxVolume &quadrantBoxVolume, SharedPtr< Heightmap > heightmap)
Private Types
enum	{   TRI0_VIX0_LAT = 0, TRI0_VIX0_LON = 0, TRI0_VIX1_LAT = 1, TRI0_VIX1_LON = 0,   TRI0_VIX2_LAT = 0, TRI0_VIX2_LON = 1, TRI1_VIX0_LAT = 1, TRI1_VIX0_LON = 0,   TRI1_VIX1_LAT = 1, TRI1_VIX1_LON = 1, TRI1_VIX2_LAT = 0, TRI1_VIX2_LON = 1 }
Private Member Functions
void	Reset (void)
void	MakeTile (void)
void	MakeLocalVertexs (void)
void	MakeNormals (void)
void	MakeTexture (void)
void	MakeTriangles (void)
void	MakeTrianglesTexCoords (const fp worldLat, const fp worldLon)
void	MakeTileObject (void)
NormalVertex	ComputePolygonNormalOfTriangle0 (const fp worldLat, const fp worldLon)
NormalVertex	ComputePolygonNormalOfTriangle1 (const fp worldLat, const fp worldLon)
NormalVertex	ComputeVertexNormal (const fp worldLat, const fp worldLon)
Private Attributes
CLASS_VAR uint	msMedianHeight
	median height tracked for every Heightmap
TileArgs	mTileArgs
shptr< Heightmap >	mHeightmap
	Heightmap correlating to box volume.
fp	mWorldLat
fp	mWorldLon
	corner of Tile in World Space
WorldVertex	mPosition
TileGraph	mTileGraph
Classes
struct	TileArgs
struct	TileGraph

---

Detailed Description

Makes drawable Tile objects from a section of heightmap.

///
///    0  1  = 2 subdivisions per edge
///  +--+--+
///  | /| /|
///  |/ |/ |
///  +--+--+
///  | /| /|
///  |/ |/ |
///  +--+--+
///  0  1  2 = 3 vertexs per edge
///
/// 

---

Member Enumeration Documentation

anonymous enum [private]

Enumerator:

TRI0_VIX0_LAT
TRI0_VIX0_LON
TRI0_VIX1_LAT
TRI0_VIX1_LON
TRI0_VIX2_LAT
TRI0_VIX2_LON
TRI1_VIX0_LAT
TRI1_VIX0_LON
TRI1_VIX1_LAT
TRI1_VIX1_LON
TRI1_VIX2_LAT
TRI1_VIX2_LON

---

Constructor & Destructor Documentation

mod_sim::TileFactory::TileFactory

(

void

)

ctor/dtor. Init() substitutes.

mod_sim::TileFactory::~TileFactory

(

)

---

Member Function Documentation

void mod_sim::TileFactory::Populate	(	const BoxVolume &	quadrantBoxVolume,
		SharedPtr< Heightmap >	heightmap
	)

void mod_sim::TileFactory::Reset

(

void

)

[private]

Reset state to prepare for the building the next Tile. To be called at start of MakeTile().

void mod_sim::TileFactory::MakeTile

(

void

)

[private]

Inner-loop.

This is the inner-loop of that produces pairs of triangles of one Tile.

Parameters:

mWorldLat,mWorldLon

(implied)

void mod_sim::TileFactory::MakeLocalVertexs

(

void

)

[private]

Make nodes for local vertexs.

0 1 2 corner-relative tile coords -1 0 +1 center-relative tile coords +--+--+ subdivisionsEdge=2 | /| /| |/ |/ | +--+--+ | /| /| |/ |/ | +--+--+

void mod_sim::TileFactory::MakeNormals

(

void

)

[private]

Make nodes for polygon normals and vertex normals.

Two sets of polygon normals: ---------------------------- For a pair of triangles, mPolygonNormals0 and mPolygonNormals1 are two Array2D objects. They are catenated into one flat array. Therefore, the vixs of the second triangle begin at the middle of the flat array.

void mod_sim::TileFactory::MakeTexture

(

void

)

[private]

Make node for texture.

void mod_sim::TileFactory::MakeTriangles

(

void

)

[private]

Make nodes for triangles.

TileGraph::mLocalVertexs2D is needed here, not for the values but rather, for their indexs, to build vixs.

void mod_sim::TileFactory::MakeTrianglesTexCoords	(	const fp	worldLat,
		const fp	worldLon
	)			[private]

Map texture coordinates of triangle to terrain colormap.

void mod_sim::TileFactory::MakeTileObject

(

void

)

[private]

Make a drawable Tile Object from Graph.

NormalVertex mod_sim::TileFactory::ComputePolygonNormalOfTriangle0	(	const fp	worldLat,
		const fp	worldLon
	)			[private]

Compute polygon normal (normal vector on polygon). That is, compute polygon normals of the 2 triangles of a LandTile.

vix3 __ vix2 |\ | vix0 |_\| vix1

NormalVertex mod_sim::TileFactory::ComputePolygonNormalOfTriangle1	(	const fp	worldLat,
		const fp	worldLon
	)			[private]

NormalVertex mod_sim::TileFactory::ComputeVertexNormal	(	const fp	worldLat,
		const fp	worldLon
	)			[private]

Compute an average normal vector from 8 surrounding triangles contained in 4 surrounding quads. _____ |\ |\ | |_\._\| |\ |\ | |_\|_\|

---

Member Data Documentation

uint mod_sim::TileFactory::msMedianHeight [private]

median height tracked for every Heightmap

TileArgs mod_sim::TileFactory::mTileArgs [private]

shptr<Heightmap> mod_sim::TileFactory::mHeightmap [private]

Heightmap correlating to box volume.

fp mod_sim::TileFactory::mWorldLat [private]

fp mod_sim::TileFactory::mWorldLon [private]

corner of Tile in World Space

WorldVertex mod_sim::TileFactory::mPosition [private]

TileGraph mod_sim::TileFactory::mTileGraph [private]

---

The documentation for this class was generated from the following files:

• mod_sim_terrain_tile.hh
• mod_sim_terrain_tile.cc

Palomino 3D Engine documents generated by doxygen 1.5.3 on Fri Nov 23 11:26:31 2007