struct TexturingBatch in Tinman.Terrain.Meshing

A batch for smooth texturing of a mesh sector.

struct	TexturingBatch	implements	IComparable<TexturingBatch>
			IEquatable<TexturingBatch>

Remarks

TexturingBatch values have this sort order:

1. TextureIndex of BaseTexture in Atlas (ascending)
2. TextureIndex of Texture in Atlas (ascending)

Public / Attributes

Atlas

The associated TextureAtlas object.

public readonly field	Atlas
type	TextureAtlas

BaseSector

The parent mesh sector.

public readonly field	BaseSector
type	int32

BaseTexture

The base texture to use, as returned by TileLookup.

public readonly field	BaseTexture
type	int32

Batch

The mesh sector batch.

public readonly field	Batch
type	SectorBatch

Blend0

Coefficient vector for distance-based texture tile blending on the GPU.

public readonly field	Blend0
type	Vec4F

Remarks:

Tile blending is necessary in order to avoid visible artifacts due to swapping of texture tiles; it can be performed on the GPU with the Blend0 and Blend1 coefficients according to this formula:

        /    1 \
        |    u |
f     = |    v | * (Blend0 / x + Blend1)
        \  u*v /

pixel = (1 - f) * S0 + (factor) * S1;

Values on the GPU:

    u, v   : texture coordinates
    x      : Distance between camera and vertex
    S0     : Sample of parent texture tile
    S1     : Sample of child texture tile
    Blend0 : Shader constant (per-texture state)
    Blend1 : Shader constant (per-texture state)

The texture coordinates u and v have been set up with TileSetup and been computed on the GPU as described there. The blend factor f can optionally be modified by a smoothstep function (e.g. SmootherStep). This will make the transition slope steeper at the center. Additionally, the texture tile age (see TileFadeReset and TileFadeFactor) can be used to fade in freshly loaded tiles.

Blend1

Coefficient vector for distance-based texture tile blending on the GPU.

public readonly field	Blend1
type	Vec4F

Remarks:

See remarks of Blend0 for details.

Coords

The pyramid tile coordinates of this texturing batch.

public readonly field	Coords
type	PyramidCoords

Texture

The texture to use, as returned by TileLookup.

public readonly field	Texture
type	int32

Public / Methods

CompareTo

public method	CompareTo (TexturingBatch other)
type	int32
params	other

Equals

public method	Equals (TexturingBatch other)
type	bool
params	other